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Published Research PapersFiltered: Year 2026 • 44 • 4

Showing 28 of 127 peer-reviewed papers with full Graphical Abstracts.

Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604006• Jan 15, 2026

Synergistic Regulation by Long- and Short-Chain Quorum Sensing Signaling Molecules Enhances Sulfamethoxazole Metabolism in Electroactive Biofilms within a Microbial Electrolysis Cell Coupled Anaerobic Digestion System

Authors: LONG Xi, ZHANG Baowen, TIAN Jing, XIONG Jianbing, SUN Wenyu, WANG Tao

High-strength sulfamethoxazole (SMX) wastewater severely inhibits anaerobic microorganisms, reducing organic degradation and methane yield. This study investigated the effects of short-chain (C6-HSL) and long-chain (C12-HSL) N-acyl-homoserine lactone (AHL) signaling molecules, individually and in combination, on the construction, performance, and antibiotic resistance gene (ARG) profiles of anaerobic electroactive biofilms within a microbial electrolysis cell coupled anaerobic digestion (MEC-AD) system. Compared to the control (no AHLs), SMX removal efficiency increased by 9.26%, 7.44%, and 10.67% for C6-HSL (T1), C12-HSL (T2), and combined (T3) treatments, respectively. Methane production rates rose by 20.4%, 16.9%, and 23.1% for T1, T2, and T3, respectively. AHLs promoted extracellular polymeric substance secretion, enhancing electroactive microbe attachment to the anode. Microbial community analysis revealed increased diversity and modulated key functional genera. Notably, Georgenia abundance increased by 16.77% (T1) and 36.47% (T3) but decreased by 15.99% (T2). ARG analysis showed that single AHLs elevated intI1, sul1, and sul2 abundances, whereas combined AHLs (T3) exhibited a milder response, with sul2 abundance reduced by 4.92% relative to control. This suggests synergistic AHLs suppress ARG host proliferation. This study first demonstrates that combined short- and long-chain AHLs enhance electroactive biofilm formation, maintain microbial community stability, and modulate ARG dissemination risk, offering a quorum sensing-based strategy for antibiotic wastewater treatment and risk management.

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Synergistic Regulation by Long- and Short-Chain Quorum Sensing Signaling Molecules Enhances Sulfamethoxazole Metabolism in Electroactive Biofilms within a Microbial Electrolysis Cell Coupled Anaerobic Digestion System

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604007• Jan 15, 2026

Preparation of Solid-Phase Carbon Sources with Different Ratios and Their Carbon Release Properties

Authors: ZHU Shenghui, ZHOU Gang, ZHU Ye, MIAO Lingzhan, HOU Jun

Low C/N ratios in wastewater treatment plant effluent necessitate external carbon sources for denitrification, but conventional liquid carbon sources are costly and unstable. This study prepared nine composite solid-phase carbon sources by combining PHBV with natural cellulose materials (straw, sawdust, corncob) at different mass ratios. Dynamic release experiments, DOC analysis, UV-Vis spectroscopy, and EEM fluorescence were employed to characterize carbon release. Results showed that increasing cellulose proportion in corncob-based sources led to release patterns opposite to those of straw- and sawdust-based sources. For straw and sawdust, higher cellulose ratios accelerated release rates, increased total release and duration, reduced aromaticity and molecular weight of released DOM, and promoted protein-like components (tryptophan, tyrosine), indicating enhanced bioavailability. Under identical ratios, corncob-based sources exhibited moderate total release, release durations exceeding 134 h, lower DOM aromaticity and molecular weight, and lower humic substance proportion, indicating superior bioavailability and engineering potential. Among the nine sources, JG5, MX5, and CC4 (PHBV:cellulose mass ratios of 4:5, 4:5, and 1:1, respectively) showed optimal comprehensive performance with low theoretical maximum release, long release periods, and high mass transfer coefficients. EEM-PARAFAC identified three DOM components (protein-like C1, C2; humic-like C3), with protein-like components dominating. This study validates the relationship between cellulose proportion and release kinetics and reveals synergistic regulation of DOM components, offering guidance for designing effective solid-phase carbon sources.

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Preparation of Solid-Phase Carbon Sources with Different Ratios and Their Carbon Release Properties

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604010• Jan 15, 2026

Enhancement of Anaerobic Digestion Operational Efficiency for Guar Gum Production Wastewater Using a Microaerobic-Biochar Coupled System

Authors: DONG Yuanyuan, YU Jianchang, SHAN Yu, XU Tian, BU Jiuhe, WANG Tao

Guar gum production wastewater contains 1,2-propanediol, which in conventional anaerobic treatment causes propionate accumulation and microbial inhibition. Microaerobic conditions foster fermentative bacterial metabolism, enhancing organic substrate conversion, while biochar promotes anaerobic microbial aggregation and oxygen tolerance. This study treated actual guar gum wastewater using three configurations: blank control, anaerobic, and microaerobic-biochar (O2/BC) coupled systems. Under mesophilic conditions (37 °C), with micro-aeration at 0.2 mL/(g VS·d) and biochar dosage of 15 g/L, the O2/BC system achieved a COD removal efficiency of 90%, 10.6 percentage points higher than the anaerobic control. Effluent COD and propionate concentrations dropped to 3800 mg/L and 0.15 g/L, respectively, representing reductions of 49.6% and 98.4% versus the control. Biogas production was 1.64 times that of the control, with a maximum methane concentration of 77.2%. Fourier transform infrared spectroscopy (FT-IR) indicated increased abundance of –OH, –CH2–, and C–O functional groups on sludge surfaces, revealing biochar's adsorption enhancement. Scanning electron microscopy (SEM) showed dense microbial aggregates dominated by long bacilli, distinct from conventional anaerobic sludge. Microbial community analysis revealed increased abundance of Clostridium and Comamonas, modulating the propionate-to-acetate ratio and optimizing acidification efficiency, thereby promoting complex organic degradation. This study provides a novel technical pathway for biological treatment of alcohol-rich organic wastewater.

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Enhancement of Anaerobic Digestion Operational Efficiency for Guar Gum Production Wastewater Using a Microaerobic-Biochar Coupled System

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604001• Jan 15, 2026

Occurrence Characteristics, Source Apportionment, and Ecological Risk Assessment of Pesticides in Plateau Lakes: A Case Study of Dianchi Lake

Authors: WANG Jialin, ZHOU Lü, CHENG Chen, ZHOU Xun, LI Xinhua, LUO Jingyang, LIU Jianchao

This study systematically investigated the occurrence, spatial distribution, sources, and ecological risks of 160 pesticides in Dianchi Lake, a typical plateau lake impacted by agricultural activities. A total of 37 pesticides were detected in the water, with total concentrations ranging from 64.2 to 1132.8 ng/L (average 610.0 ng/L). Fungicides, including boscalid (BOS), fluopicolide (FPC), and dimethomorph (DMM), were dominant, contributing up to 65.0% of the total concentration. Spatially, the southern lake region exhibited significantly higher concentrations (672.5 ng/L) than the north, attributed to intensive facility agriculture. Highly hydrophobic pesticides, such as penconazole (PEN), showed a tendency to enrich in bottom layers. Source apportionment identified inflowing rivers and wastewater treatment plant effluents as primary input sources, with average concentrations 7 and 9 times higher than lake water, respectively. Ecological risk assessment revealed that pesticides posed the highest risk to algae, followed by daphnia and fish. Prometryn (PMT) was identified as a high-risk factor for algae, while profenofos (PFF) and carbendazim (CBD) posed potential threats to higher trophic levels. These findings provide fundamental data and technical support for understanding pesticide pollution in plateau lake ecosystems.

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Occurrence Characteristics, Source Apportionment, and Ecological Risk Assessment of Pesticides in Plateau Lakes: A Case Study of Dianchi Lake

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604009• Jan 15, 2026

Microbiome Mechanisms of Composite Carbon Sources for Enhancing Denitrification and Reducing N2O Emissions

Authors: LIU Yilin, XU Yunrong, LIANG Yunyao, XIE Xiaojing, ZHENG Haixin, YUAN Jing, CHEN Liping, WEI Chaohai, QIU Guanglei

Biological nitrogen removal in wastewater treatment plants (WWTPs) is often limited by insufficient influent carbon sources, necessitating external carbon addition to enhance denitrification. Conventional single carbon sources, such as sodium acetate, frequently fail to meet the metabolic demands of complex microbial communities, compromising nitrogen removal efficiency and stability. Composite carbon sources, by providing multiple electron donors, can improve metabolic cooperation among microorganisms, yet their underlying microbial mechanisms remain insufficiently understood. In this study, activated sludge from a municipal WWTP was used to investigate the microbial mechanisms of composite carbon sources during denitrification. Batch denitrification experiments were conducted in combination with metagenomic and metatranscriptomic analyses to systematically characterize microbial community structure and functional gene expression under different carbon source conditions. Results showed that, compared with sodium acetate as the single carbon source, the composite carbon source system (sodium acetate: sodium succinate: ethanol = 2:1:3) increased the denitrification rate from (6.822 ± 0.141) mg/(L·h) to (8.370 ± 0.186) mg/(L·h), representing a 22.7% improvement, while reducing N2O accumulation by approximately 55%. Metagenomic analysis revealed that Ottowia, Rubrivivax, Thauera, and Zoogloea were the dominant denitrifying genera. Metatranscriptomic results further demonstrated that the composite carbon sources significantly upregulated the transcription of key denitrification genes, with nirS, norB, and nosZ increasing by 37.8%, 27.4%, and 48.6%, respectively. In addition, the composite carbon sources promoted complementary carbon metabolic strategies among different microbial communities, enhancing electron donor supply and improving denitrification efficiency. These findings indicate that composite carbon sources synergistically enhance denitrification performance through regulation of functional gene transcription in complex microbial communities, providing a theoretical basis for carbon source optimization in WWTPs.

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Microbiome Mechanisms of Composite Carbon Sources for Enhancing Denitrification and Reducing N2O Emissions

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604004• Jan 15, 2026

Key Environmental Behaviors and Pollution Control Strategies of Tire Wear Particles in Aquatic Environments

Authors: YU Yirui, WEI Jin, WEI Yongping, WEI Zhenlei, LIU Jun, LI Keyan, ZHANG Xianbing

Tire wear particles (TWPs) are emerging pollutants and constitute the dominant type of microplastics (MPs) in urban stormwater runoff, accounting for up to 90% of MPs in some cases. They are characterized by small size, high mobility, complex composition, and significant toxicity. Current research on TWPs remains fragmented, lacking a comprehensive understanding of their environmental behaviors and pollution control in aquatic systems. This review systematically analyzes the enrichment and vectoring roles of TWPs for coexisting pollutants, and their environmental fate, including ecotoxicological impacts, detection methodologies, release of intrinsic additives, and aggregation and sedimentation behaviors. Drawing on insights from other microplastic studies, the paper explores control technologies across the pollution pathway—source, transport, and terminal treatment—and proposes feasible management strategies. Key findings indicate that TWPs can adsorb heavy metals and organic contaminants, with adsorption capacities influenced by aging processes. Their aggregation is governed by solution chemistry, with critical coagulation concentrations varying with ionic strength and pH. The release of additives such as zinc and benzothiazoles is significant, posing ecological risks. Future research should focus on real-water aggregation mechanisms, additive release under natural conditions, long-term performance of treatment facilities like constructed wetlands under TWPs stress, enzymatic degradation pathways, and integration of AI, big data, and IoT for cost-effective detection and risk modeling. This review provides a scientific basis for developing targeted pollution control measures for TWPs in aquatic environments.

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Key Environmental Behaviors and Pollution Control Strategies of Tire Wear Particles in Aquatic Environments

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604011• Jan 15, 2026

Spatial Heterogeneity of Reverse Osmosis Membrane Fouling During Long-Term Reclaimed Water Treatment: A 3.5-Year Field Study

Authors: LIU Jin, LI Yawen, LI Jiayang, ZHOU Yifan, CHEN Chen, MA Liyuan, SHANG Xingying

Reverse osmosis (RO) membrane fouling remains a critical bottleneck in reclaimed water production, yet its spatial heterogeneity over extended operation is poorly understood. This study investigated fouling characteristics and microbial community dynamics on RO membranes after 3.5 years of operation in a full-scale microfiltration-reverse osmosis (MF-RO) system treating reclaimed water. Long-term monitoring showed stable effluent quality (turbidity <0.1 NTU, conductivity <400 μS/cm), but RO inlet pressure exhibited seasonal fluctuations of 15%–22% between summer and winter, attributed to water viscosity changes. Membrane autopsies revealed distinct fouling layers at the inlet (RO1) and outlet (RO2) ends. RO1 featured a dense bio-inorganic composite fouling layer with CaSO4 crystals and rod-shaped microbial aggregates (5–10 μm), dominated by Proteobacteria (77.11%), particularly Alphaproteobacteria (71.49%) and Xanthobacteraceae (35.29%), which secreted extracellular polymeric substances (EPS) to form biofilms. In contrast, RO2, exposed to higher salinity, showed reduced microbial abundance (Proteobacteria decreased to 64.79%) and a shift toward halotolerant taxa, including Microbacteriaceae (23.73%) and Actinobacteriota (24.76%), with EPS secretion increased by 42%. Alphaproteobacteria relative abundance dropped by 19.3%, while Gammaproteobacteria rose to 12.54%. These findings elucidate salinity-driven microbial succession and spatial heterogeneity of fouling, providing a basis for targeted antifouling strategies and 'zonal-graded' cleaning protocols in reclaimed water plants.

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Spatial Heterogeneity of Reverse Osmosis Membrane Fouling During Long-Term Reclaimed Water Treatment: A 3.5-Year Field Study

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604003• Jan 15, 2026

Non-targeted Analysis of Emerging Contaminant Characteristics and Distribution Differences in Wastewater from a Metro Maintenance Depot

Authors: PAN Jihao, LIU Zhiying, ZHOU Zailing, WU Rongchu, CHEN Zhenguo, QIU Guanglei

Emerging contaminants (ECs) in wastewater from urban transportation infrastructure remain poorly characterized. This study employed high-resolution mass spectrometry (HRMS)-based non-target screening to systematically identify the composition and spatial distribution of ECs in wastewater from three functional zones of a metro maintenance depot: storeroom (S1), office/residential area (S2), and final discharge outlet (S3). A total of 417 contaminants were detected, spanning eight categories including industrial materials, pharmaceuticals, pesticides, and natural products. Among these, 48 substances were identified with Level 1 confidence via spectral matching. Pesticides exhibited the highest detection frequency and concentration levels, representing the primary contaminant load. Semi-quantitative concentration heatmaps of 24 pesticides revealed significant spatial variation: S2 showed the highest number and concentration of contaminants, reflecting inputs from landscaping and vector control; S1 and S3 showed lower levels, indicating dilution, migration, and attenuation. Representative pesticide bifenox displayed a clear concentration gradient (S2 > S1 > S3), suggesting transport mechanisms such as surface runoff, hydraulic transfer, and sorption. These findings underscore the complexity and diversity of EC sources in metro depot wastewater, highlight the need to prioritize pesticides in regulatory management, and provide fundamental data for understanding EC environmental behavior and informing water environment risk assessment.

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Non-targeted Analysis of Emerging Contaminant Characteristics and Distribution Differences in Wastewater from a Metro Maintenance Depot

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604005• Jan 15, 2026

Effects of Exogenous Antibiotic-Resistant Bacteria Exposure on Wheat Seedling Growth and Its Root Endophytes and Rhizosphere Bacterial Communities

Authors: ZHANG Chongmiao, SUN Shijing, LI Yongqiang, LIU An

To elucidate the effects of exogenous antibiotic-resistant bacteria (ARB) exposure on wheat growth and associated bacterial community assembly, the inhibitory impacts of exogenous ARB on wheat seedling root and shoot length, shifts in root endophytic and rhizosphere bacterial communities, and the horizontal transfer of exogenous antibiotic resistance genes (ARGs) to indigenous endophytic bacteria were investigated using plate culture counting and 16S rRNA high-throughput sequencing. The results showed that exogenous ARB exposure significantly suppressed wheat seedling root and shoot growth, with inhibition rates increasing in an ARB concentration-dependent manner. At an exogenous ARB concentration of 108 CFU/mL, the inhibition rates of seedling root and shoot length reached 68.83% and 36.87%, respectively. During the period of ARB exposure, the relative abundance of Clostridium_sensu_stricto_5 in root endophytic bacteria increased rapidly, becoming the most dominant genus (45.02%) by the end of the exposure period. In contrast, Betaproteobacteriales remained the dominant order in the rhizosphere bacterial community throughout the experiment, with its relative abundance increasing continuously over time. The proportion of ARB-carrying endophytic bacteria initially decreased and then increased during exposure, showing a significant positive correlation with the relative abundances of Clostridium_sensu_stricto_5, Clostridium_sensu_stricto_1, Bacillus, and Paenibacillus (P<0.05). In summary, exogenous ARB exposure significantly inhibits wheat seedling growth and alters the community structure of both root endophytic and rhizosphere bacteria. Sustained ARB exposure leads to the transfer of exogenous ARGs to root endophytes, and Clostridium_sensu_stricto species may act as potential hosts for ARGs in wheat seedling roots.

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Effects of Exogenous Antibiotic-Resistant Bacteria Exposure on Wheat Seedling Growth and Its Root Endophytes and Rhizosphere Bacterial Communities

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604002• Jan 15, 2026

Determination of 22 Per- and Polyfluoroalkyl Substances in Surface Water by Solid-Phase Extraction with Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry

Authors: TANG Shi, SUN Tao, SUN Pan, CHEN Jie

A robust analytical method was developed for the simultaneous determination of 22 per- and polyfluoroalkyl substances (PFAS) in surface water using ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). To address the loss of particle-bound PFAS, the method incorporates a methanol extraction step for particulate matter retained on filters, followed by combining the extract with the filtrate. Samples were then concentrated and purified using weak anion exchange (WAX) solid-phase extraction (SPE) cartridges. After nitrogen evaporation, the residue was reconstituted in methanol/water (8:2, v/v) and filtered prior to analysis. Quantification was performed using isotope dilution. The method exhibited excellent linearity (R² > 0.995) over a concentration range of 1–250 µg/L. Method detection limits ranged from 0.2 to 0.6 ng/L, and method quantification limits from 0.8 to 2.4 ng/L. Recoveries in blank water and surface water matrices were 85.3%–139% and 76.4%–127%, respectively, with relative standard deviations (RSD, n=6) below 15%. Compared to conventional methods without particulate extraction, this approach significantly improved recovery rates in surface water, effectively eliminating negative bias caused by particle adsorption. The method is sensitive, accurate, and reliable, making it suitable for routine monitoring of PFAS in surface water.

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Determination of 22 Per- and Polyfluoroalkyl Substances in Surface Water by Solid-Phase Extraction with Ultra-High Performance Liquid Chromatography-Tandem Mass Spectrometry

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604008• Jan 15, 2026

A Pilot-Scale Study on Iron-Driven Autotrophic Denitrification Enhanced by CF-Fe-CS Cathode for Low C/N Wastewater Treatment

Authors: LÜ Tonghui, AN Facai, SUN Dezhi

Municipal wastewater treatment plant (WWTP) effluent in China typically exhibits a low carbon-to-nitrogen (C/N) ratio, necessitating substantial external carbon addition for conventional heterotrophic denitrification, which incurs high costs and secondary pollution risks. Nitrate-dependent ferrous oxidation (NDFO) offers a promising alternative, yet suffers from unsustainable iron sources and surface passivation. This study constructed a pilot-scale electrochemical-biological coupled system (CF-Fe-CS/NAFO) with an effective volume of 200 L and a treatment capacity of 100 L/d, incorporating a composite cathode (5% apparent filling rate of carbon felt-iron-chitosan, CF-Fe-CS). A constant potential of -1.0 V (vs. Ag/AgCl) was applied to the cathode to achieve in-situ electrochemical reduction of Fe(III). During stable operation from day 16 to 60 with a hydraulic retention time (HRT) of 48 h and synthetic influent containing 15 mg/L NO3-N, effluent NO3-N remained below 6.5 mg/L, achieving total nitrogen (TN) removal of 50-60%, whereas the control reactor (no applied potential) exhibited effluent NO3-N above 12 mg/L and TN removal below 20%. From day 61 to 74, treating real secondary sedimentation tank effluent (influent NO3-N: 15.29 mg/L), the system reduced effluent NO3-N to 6.06 mg/L, maintaining TN removal above 50%. From day 74 to 98, as HRT was sequentially reduced from 48 h to 24, 12, 6, and 3 h, effluent NO3-N increased to 9.5, 11.9, 13.6, and 14.6 mg/L, with TN removal efficiencies of 32.6%, 19.9%, 10.9%, and 5.8%, respectively. These results demonstrate that the CF-Fe-CS/NAFO system achieves long-term, stable, advanced nitrogen removal from WWTP secondary effluent without external organic carbon.

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A Pilot-Scale Study on Iron-Driven Autotrophic Denitrification Enhanced by CF-Fe-CS Cathode for Low C/N Wastewater Treatment

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604012• Jan 15, 2026

Design and Operational Performance of a Modified Bardenpho Process in a Wastewater Treatment Plant

Authors: LIN Lifeng, WANG Long, JIANG Luman

A newly constructed wastewater treatment plant with a design capacity of 100,000 m3/d receives influent containing approximately 15% industrial wastewater, resulting in water quality and quantity fluctuation coefficients of 1.2–1.5, refractory organic matter (as COD) exceeding 35% of total COD, and a total nitrogen (TN) concentration up to 55 mg/L. To ensure stable effluent compliance and enhance shock resistance, a modified Bardenpho process was implemented, integrating multi-point influent distribution, post-anoxic and post-aerobic zones, and supplemented with an equalization basin, high-efficiency sedimentation tank, and denitrifying deep-bed filter. During commissioning and operation, the process achieved average removal efficiencies of 96.10% for COD, 98.24% for NH3-N, 83.89% for TN, and 98.29% for TP. Effluent concentrations stabilized at 15.4 mg/L COD, 0.57 mg/L NH3-N, 7.94 mg/L TN, and 0.12 mg/L TP, consistently meeting the Class 1A standard of GB 18918—2002. The modified Bardenpho process demonstrates strong adaptability and stability for treating wastewater with high nitrogen and refractory organic loads, improving carbon source utilization and reducing energy consumption. Design parameters and operational experience provide valuable references for similar municipal plants, particularly those receiving significant industrial wastewater fractions.

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Design and Operational Performance of a Modified Bardenpho Process in a Wastewater Treatment Plant

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604013• Jan 15, 2026

Enhanced Treatment of Reclaimed Water Using Functional Manganese-Sand Media in Constructed Wetlands

Authors: XU Bin, LIU Xiaoyu, GAO Mengjia, ZHAO Wei, LIU Hao, LIU Li, CHANG Feng, BI Xuejun, CAI Yan'an

Reclaimed water serves as an alternative water source for replenishing natural water bodies, yet residual pollutants pose ecological risks. A pilot-scale hybrid vertical flow constructed wetland filled with manganese ore sand, quartz sand, and cobblestones was operated for approximately 140 days to assess nutrient and organic matter removal, ecotoxicity, and the suitability of manganese sand as a functional medium. Influent concentrations were up to 0.4 mg/L ammonia, 0.2 mg/L phosphate, 8 mg/L nitrate, and 30 mg/L COD. After 2–3 months of operation, ammonia and phosphate removal efficiencies exceeded 90% and 80%, respectively. Average reductions for nitrate and COD were 0.67 mg/L and 4.2 mg/L. Manganese sand enhanced organic decomposition, reducing maximum 3D fluorescence intensity by 26%, humic substances by 48%, UV254 by 38%, and achieving 70.8% removal of four target antibiotics. Purified water exhibited no significant genotoxicity, with micronucleus rates approaching tap water levels, and non-concentrated samples showed no acute biotoxicity. However, concentrated samples displayed acute toxicity, suggesting different causative pollutants for genotoxicity and acute toxicity. The study supports manganese sand as an effective medium for improving reclaimed water quality and controlling ecological risks.

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Enhanced Treatment of Reclaimed Water Using Functional Manganese-Sand Media in Constructed Wetlands

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604014• Jan 15, 2026

CFD-Based Investigation of Ice Slurry Pigging and Optimization of Cleaning Parameters

Authors: LI Ziyi, TAO Hui, ZHU Qixuan, SHEN Zhouwei, TANG Yangyang, LIN Tao

Ice slurry pigging is an emerging technology for cleaning water supply pipelines, yet quantitative understanding of its cleaning mechanisms and optimal operating conditions remains limited. This study developed a computational fluid dynamics (CFD) model integrating the kinetic theory of granular flows (KTGF), the Euler-Euler method, and the shear stress transport (SST) model to simulate ice slurry flow and wall shear stress distribution. The model was validated against experimental data, showing a 6.4% error in particle concentration distribution, a 3.3% average error in solid-phase velocity in the mainstream region, and a pressure drop error within 20%. A total of 125 simulations were performed under varying initial concentrations (20%–60%), particle diameters (0.3–1.0 mm), and flow velocities (0.2–1.0 m/s). Results indicate that higher initial concentrations (60%) achieve effective cleaning of both upper and lower pipe walls, with an effective shear stress ratio of 77.39%. Larger particles exhibit pronounced upward movement, increasing non-uniformity in solid distribution. Flow velocity is the dominant factor affecting wall shear stress; at 1.0 m/s, the effective shear stress ratio reaches 83.16%. The optimal parameters for cumulative shear stress were identified as 50% initial concentration, 0.5 mm particle diameter, and 1.0 m/s flow velocity, yielding an average cumulative shear stress of 11.59 Pa·s. For effective cumulative shear stress, the same parameters produced 9.89 Pa·s, while the highest effective shear stress ratio (88.50%) was achieved with 0.3 mm particles at 1.0 m/s and 50% concentration. This research provides theoretical guidance for ice slurry pigging operations in water supply pipelines.

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CFD-Based Investigation of Ice Slurry Pigging and Optimization of Cleaning Parameters

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604015• Jan 15, 2026

Preparation of Microemulsion and Its In-Situ Oil Removal Performance on Oily Sludge from Shale Gas Drilling Platforms

Authors: HE Linglin, LIAO Song, ZHAO Ziyu, ZHAO Mengting, GAO Wen, WANG Wei, LIU Shengyu

Shale gas extraction generates hazardous oily sludge, necessitating effective in-situ treatment. Microemulsion technology offers low energy consumption, cost efficiency, and high oil removal without heating. This study investigates single-surfactant microemulsions using sodium dodecyl sulfate (SDS) and alpha-olefin sulfonate (AOS), and composite microemulsions with sodium silicate (Na2SiO3). Phase behavior and effects of surfactant, alcohol, and salt concentrations on oil removal were examined. Optimal single formulations achieved removal rates of 86.33% for SDS (SDS:alcohol:NaCl = 2.72%:13.21%:2.17% mass ratio) and 87.45% for AOS (SDS:alcohol:NaCl = 2.72%:15.41%:2.17%). SDS microemulsions showed superior phase stability despite slightly lower removal efficiency. Composite SDS-Na2SiO3 microemulsion achieved 92.47% oil removal, outperforming single systems, and could be recycled five times while meeting national secondary reuse standards. AOS-Na2SiO3 exhibited better salt resistance, whereas SDS-Na2SiO3 showed better alcohol resistance. This work provides a novel approach for in-situ oily sludge treatment.

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Preparation of Microemulsion and Its In-Situ Oil Removal Performance on Oily Sludge from Shale Gas Drilling Platforms

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604027• Jan 15, 2026

CO Emission Factors of Typical Magnesia Production Processes

Authors: LÜ Chen, WANG Huili, LU Yong, CAI Bofeng

Magnesia production processes generate carbon monoxide (CO) emissions, yet publicly available measured data on CO emission factors for these processes remain scarce, constraining the accuracy of emission accounting and mitigation assessment in the industry. To address this data gap, this study selected three representative magnesia-producing enterprises in Anshan, Liaoning Province, China, covering three typical technological routes: the two-stage calcination process (light burning-briquetting-shaft kiln dead burning), the suspension calcination-dead burning sintering process, and the electric arc furnace melting process. Under the condition that enterprises were not equipped with online CO monitoring modules, an estimation approach coupling manual measurements with conventional indicators from the Continuous Emission Monitoring System (CEMS) was developed. By establishing characteristic concentration ratios between CO and nitrogen oxides (NOx) or particulate matter (PM), and combining them with annual CEMS monitoring data, product-level CO emission factors were calculated. The results showed that the CO emission factors for the two-stage calcination process, the suspension calcination–dead burning sintering process, and the electric arc furnace melting process were 5.35, 5.18, and 1.40 kg/t, respectively, among which the emission level of the electric arc furnace melting process was significantly lower than that of sintering-based processes. This study provides enterprise-level measured CO parameters for the magnesia industry, filling the data gap in emission factors for typical technological routes. It also proposes an emission factor estimation method applicable under conditions where online CO monitoring data are unavailable, which can provide methodological support for pollutant emission accounting and emission inventory development in similar data-constrained industries.

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CO Emission Factors of Typical Magnesia Production Processes

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604023• Jan 15, 2026

Synthesis of A- and H-type Zeolites from Fly Ash and Their Adsorption Mechanisms for SO2, CO2, and NO

Authors: DAI Ruijia, ZHAO Yongqi, DOU Jinxiao, YU Jianglong

Fly ash, a byproduct of coal combustion, poses severe environmental challenges. This study synthesizes A- and H-type zeolites from fly ash via hydrothermal treatment and evaluates their adsorption performance for low-concentration acidic gases (SO2, CO2, NO) at 1000 mg/m3. The zeolites exhibited pore sizes of 3–5 nm, with specific surface areas of 18.59 m2/g (A-type) and 22.32 m2/g (H-type). At 20 °C, A-type zeolite achieved maximum saturated adsorption capacities of 1.07 mmol/g for SO2, 0.26 mmol/g for CO2, and 0.048 mmol/g for NO; H-type zeolite showed higher capacities: 1.12, 0.29, and 0.053 mmol/g, respectively. In-situ DRIFTS revealed that T–O (T=Si/Al) groups serve as key active sites, with adsorption energies for A-type zeolite calculated as -5.11 kJ/mol (SO2), -4.07 kJ/mol (CO2), and -1.41 kJ/mol (NO). Kinetic analysis indicated conformity to the Arrhenius equation. The results demonstrate that fly ash-based zeolites are promising adsorbents for acidic gas removal, with H-type outperforming A-type due to larger surface area and more silanol sites. This work provides a theoretical basis for utilizing fly ash in gas purification, contributing to the circular economy.

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Synthesis of A- and H-type Zeolites from Fly Ash and Their Adsorption Mechanisms for SO2, CO2, and NO

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604022• Jan 15, 2026

Synergistic Benefits of Pollution Reduction and Carbon Mitigation from Converting Food Waste into Carbon Sources for Wastewater Treatment Plants

Authors: SHEN Guiyan, WEI Wei, XIAO Xiong, HUANG Jingjie, JIAO Xudong, DU Huanzheng, ZHANG Li, YUAN Wenyi, WANG Tao

The resource utilization of food waste contributes to reducing environmental pollution, driving nutrient cycling and biomass energy development, and promoting the resource recycling industry, achieving a win-win outcome for environment and economy. This study evaluated the resource recovery performance and environmental impacts of producing carbon sources for wastewater treatment through hydrolysis and acidification of food waste, comparing with two conventional alternatives: anaerobic fermentation and incineration. Results showed that among the three technologies, hydrolysis for carbon source production ranked middle in resource recycling efficiency, but its environmental benefits were superior to incineration and anaerobic fermentation. The hydrolysis process did not produce additional wastewater requiring treatment, and its greenhouse gas emissions and solid waste generation intensity were relatively low, at -40.7 kg CO2-eq/t and 9.3%, respectively. Carbon sources derived from food waste can replace commercial alternatives, reducing wastewater treatment costs and promoting synergies between pollution reduction and carbon mitigation. Sensitivity analysis revealed that water content in food waste significantly influences solid impurity generation and energy recovery efficiency of hydrolysis technology. In regions with high food waste generation and carbon source demand, hydrolysis technology is recommended to facilitate large-scale synergistic treatment of wastewater and food waste.

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Synergistic Benefits of Pollution Reduction and Carbon Mitigation from Converting Food Waste into Carbon Sources for Wastewater Treatment Plants

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604024• Jan 15, 2026

Enhanced Sludge Dewatering Efficiency and Mechanism of MnFe2O4/BC-Activated PMS

Authors: YOU Kun, LIU Juntong, WANG Zinan, ZHAO Jingrui

To enhance sludge dewatering efficiency, an MnFe2O4/BC/PMS system was constructed for sludge disintegration. Single-factor and multi-factor experiments were conducted to investigate the effects of MnFe2O4/BC (MFB) dosage, PMS dosage, and reaction time on sludge dewatering performance, establishing the optimal process parameters and the primary-secondary relationships among environmental factors. Active species identification in the MnFe2O4/BC/PMS system revealed the main free radicals responsible for sludge disintegration and the primary pathways of EPS breakdown. Results showed that the influence order of environmental factors on sludge moisture content (Wc) and total organic carbon (TOC) was MFB > PMS > reaction time, while the interaction effects followed MFB-PMS > PMS-reaction time > MFB-reaction time. Optimal dewatering occurred at MFB dosage of 132.99 mg/g DS, PMS dosage of 421.80 mg/g DS, and 18 min reaction time, achieving Wc of 45.8% and TOC of 489.2 mg/L. The ·OH and SO4−· radicals released from MnFe2O4/BC-activated PMS oxidized protein main chains, causing peptide chain breakage. This primarily reduced protein content in sludge from 174.6 mg/L to 75.7 mg/L, with TB-EPS protein content decreasing from 91.8 mg/L to 36.3 mg/L, thereby reducing EPS hydrophilicity and improving sludge dewatering efficiency.

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Enhanced Sludge Dewatering Efficiency and Mechanism of MnFe2O4/BC-Activated PMS

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604016• Jan 15, 2026

River Health Assessment and Control Countermeasures for the Lower Yellow River in Henan

Authors: WANG Wanwan, LIANG Shuai, CAO Yongtao, ZHANG Zhanshuo, TIAN Shimin, LIU Bairan

River and lake health assessment is an important technical means to evaluate the health status of rivers and lakes, scientifically analyze river and lake problems, and strengthen the implementation of the river and lake head system. Based on the Guidelines for River and Lake Health Assessment (Trial) and the characteristics and actual basin conditions of the lower Yellow River in Henan, this study determined the river health evaluation index system for this reach. Through collection of basic data and special investigations and monitoring, the health status in 2020 was evaluated from four criteria layers: 'basin', 'water', biology, and social service function. The overall score was 83.4, corresponding to a 'healthy' grade. The four criteria layer scores were 73.7, 95.0, 62.1, and 95.5, respectively. The evaluation identified main problems including low aquatic biodiversity, suboptimal shoreline conditions, and pressure on water supply security. Corresponding governance and protection measures were proposed, such as strengthening ecological protection, improving river regulation works, enhancing shoreline management, and upgrading water diversion facilities. The results provide scientific basis for river health management and the implementation of the river chief system in the lower Yellow River.

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River Health Assessment and Control Countermeasures for the Lower Yellow River in Henan

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604021• Jan 15, 2026

Numerical Simulation Study of a Novel Pulse-Jet Cleaning Blowpipe for Cartridge Filters

Authors: GU Dongrui, DENG Zhihua

A novel pulse-jet cleaning blowpipe was designed and numerically investigated to enhance the cleaning performance of cartridge filters. The blowpipe has an inner diameter of 40 mm and a total length of 660 mm, with 6 mm diameter orifices spaced at 110 mm intervals along its circumference. These orifices direct high-pressure gas jets directly onto the inner wall of the filter cartridge, achieving cleaning through combined impact force and static pressure. Computational fluid dynamics (CFD) simulations were performed under a pulse pressure of 0.3 MPa. Pressure contour maps of longitudinal and cross-sections were analyzed at various time points and blowing distances. Total pressure, dynamic pressure, and static pressure peaks were monitored at four key locations: directly in front of orifices, between front orifices, at side orifices, and between side orifices. Results indicate that the system reaches a stable state at 60 ms, significantly shortening the cleaning cycle. The highest total pressure peak (3939.22 Pa) occurs directly in front of the orifices, while the lowest static pressure peak (-134.23 Pa) is observed at side orifices, where dynamic pressure reaches a maximum, contributing to cleaning effectiveness. The cleaning intensity is superior in the upper part of the filter cartridge compared to the lower part, and side orifices exhibit better uniformity than front orifices. Compared to conventional nozzles and built-in rotators, the novel blowpipe demonstrates improved cleaning performance and uniformity, though challenges remain for complete upper-section cleaning.

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Numerical Simulation Study of a Novel Pulse-Jet Cleaning Blowpipe for Cartridge Filters

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604017• Jan 15, 2026

Multi-Scenario Simulation of Water Yield Services in the Shule River Basin Based on Climate and Land Use Changes

Authors: SHI Peng, JIA Yiyang, ZHOU Dongmei, JIANG Jing, MA Jing, ZHU Xiaoyan, ZHANG Jun

The Shule River Basin, a typical arid inland river basin, faces critical water scarcity that threatens ecological security and sustainable development. This study integrated the FLUS and InVEST models to simulate water yield in 2030 and 2050 under three climate scenarios (SSP119, SSP245, SSP585). Geographic detectors quantified the driving mechanisms of natural and human factors. Results showed: (1) Desert dominates land use (78.6% in 2020). Under SSP119, desert area decreases by 0.69% by 2050, while under SSP585 it expands by 5.7%, with grassland loss of 23.0%, indicating severe ecological degradation. (2) Water yield exhibits a south-high, north-low spatial pattern, with high values in glacier-covered and high-altitude areas. SSP119 yields the most significant increase (147.6×10^8 t by 2050), whereas SSP585 shows minimal increase (43.9×10^8 t) due to extreme climate. (3) Precipitation and DEM are core driving factors; the interaction between land use type and precipitation has the strongest influence, implying that artificial land use changes can significantly regulate water yield. This multi-scenario framework provides decision support for water resource management and ecological governance in arid inland river basins.

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Multi-Scenario Simulation of Water Yield Services in the Shule River Basin Based on Climate and Land Use Changes

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604018• Jan 15, 2026

Analysis of Exhaust Gas Dispersion Patterns and Design of High-Efficiency Gas Collection Systems in Semi-Steel Tire Vulcanization Production Lines

Authors: YAN Zimeng, DANG Xiaoqing, ZHENG Huachun, JI Shuo, QU Jiaxin, HAN Wei, WANG Leifeng, ZHANG Chunhui

To address the issues of high air volume and unorganized emissions of waste gas in semi-steel vulcanization production lines, a combined approach of experimental testing and numerical simulation was employed to study the diffusion characteristics of VOCs-containing waste gas and the air volume of the collection system. The structure of the semi-enclosed hood was optimized, and pipe diameters were adjusted to achieve negative pressure balance, enabling efficient waste gas collection. Results showed that toluene concentration distributions from numerical simulation were largely consistent with experimental measurements, with a maximum average error of -3.9%. Existing hood inlet wind speeds ranged from 0.04 to 0.2 m/s, indicating uneven distribution. Under calm wind conditions, toluene diffusion in enclosed and semi-enclosed hoods was similar, with concentrations of 248 mg/m³ and 115 mg/m³, respectively, and deposition observed in trenches. For a single vulcanizer, at a design air volume of 2700 m³/h, the enclosed hood achieved a toluene concentration of 80 mg/m³ versus 63 mg/m³ for the semi-enclosed hood, demonstrating superior capture of hot fumes. Optimizing the semi-enclosed hood with soft curtains and a height of 1200 mm, at a total design air volume of 1.0×10⁵ m³/h, yielded an average hood inlet velocity of 0.35 m/s but still uneven distribution. Adding 900 mm gradual reducers and adjusting branch pipe diameters resulted in total air volume deviations of -0.44% and 0.38% for branches I and II, respectively, with individual hood deviations below 10%. This achieved negative pressure balance, effective collection, and improved workshop hygiene.

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Analysis of Exhaust Gas Dispersion Patterns and Design of High-Efficiency Gas Collection Systems in Semi-Steel Tire Vulcanization Production Lines

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604025• Jan 15, 2026

A Multi-Pollutant Time-Series Prediction Model Based on Long Short-Term Memory Networks

Authors: ZHOU Yongquan, ZHUANG Jiawei, WANG Chuan, OUYANG Chuang, ZHAO Chunlong, LIN Kunsen, ZHAO Youcai

To meet the minute-level early-warning requirements for odor and multi-pollutant emissions at waste treatment facilities, this study proposed a multivariate short-term time-series prediction framework applicable to multi-tier scenarios covering source and boundary points (i.e., workshops and plant boundaries). Based on continuous online monitoring data with a 5-second resolution, a long short-term memory (LSTM) model using a sliding-window and recursive multi-step prediction strategy was constructed to jointly model odor concentration (OU) and pollutants including VOCs, NH3, H2S, and CH3SH (mg/m³). An evaluation protocol aligned with environmental supervision practice was established, incorporating mean absolute error (MAE), root mean square error (RMSE), goodness-of-fit (R²), skill scores (SS) relative to a persistence baseline, and threshold-based error stratification to characterize uncertainty during peak emission periods. The results showed that at workshop monitoring sites with relatively stable operating conditions, VOCs, NH3, H2S, and CH3SH exhibited a high goodness of fit and low prediction errors. In contrast, at boundary sites affected by plume arrival delays and diffusion-dilution non-stationarity, OU and VOCs displayed significantly amplified errors during peak episodes, and the skill score advantage over the baseline became unstable at certain sites. Stratified analysis consistently revealed that non-peak periods outperformed peak periods, indicating that event-driven fluctuations were the main sources of error. Accordingly, this study suggested incorporating exogenous variables such as wind speed and direction, ventilation and gate access control, and operational rhythms, along with peak-sensitive loss functions, into the model to enhance its capacity to characterize and provide early warnings for transient emission pulses. Overall, this study established a reusable methodological baseline and evaluation paradigm for minute-scale multi-pollutant prediction, providing quantitative support for the operational management and source-to-boundary coordinated control of waste treatment facilities.

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A Multi-Pollutant Time-Series Prediction Model Based on Long Short-Term Memory Networks

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604019• Jan 15, 2026

Simultaneous Removal of Fine Particles and VOCs by a Two-Stage Electrostatic Precipitator Based on Sawtooth-Rod Electrode Discharge Charging

Authors: ZHAI Yicong, WANG Hongchang, JIANG Nan, SHENG Zunrong, LI Jie

A two-stage electrostatic precipitator (ESP) integrating a sawtooth-rod electrode precharging unit and a plate-plate collection unit was developed for simultaneous removal of fine particles and volatile organic compounds (VOCs) from catering fumes. Using KCl particles and toluene as surrogates, the system achieved a fine particle (<0.3 µm) collection efficiency of 91% and a total particle collection efficiency exceeding 98% at applied voltages of +12 kV (sawtooth-rod) and -8.5 kV (plate-plate), with an ozone concentration of 176.9 mg/m³. The presence of particles enhanced toluene degradation, increasing removal efficiency from 29.2% to 53.1%. Positive DC discharge on the sawtooth-rod electrode yielded a higher corona current (800 µA vs. 375 µA for negative) and lower ozone generation (101.4 mg/m³ vs. 176.9 mg/m³), indicating superior suitability for catering fume treatment. The stable discharge characteristics of the sawtooth-rod electrode reduce energy consumption and extend operational cycles, offering a promising technical pathway for efficient, compact, and intelligent ESP systems in catering fume purification.

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Simultaneous Removal of Fine Particles and VOCs by a Two-Stage Electrostatic Precipitator Based on Sawtooth-Rod Electrode Discharge Charging

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604026• Jan 15, 2026

MIL-88A(Fe) Adsorption-Photocatalytic Synergistic Degradation of Phenanthrene-Pyrene Composite Pollutants in Soil

Authors: ZHANG Chengxue, ZHANG Shuai, ZHAO Saisai, WANG Xiaocong, XIA Meng

Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants ubiquitously present in soils, posing severe risks to ecosystems and human health. This study synthesized MIL-88A(Fe) via a hydrothermal solvent method and applied it to the photocatalytic degradation of phenanthrene-pyrene (PHE-PYR) composite contaminants in soil, investigating the adsorption-photocatalytic synergy. Results demonstrated that adsorption of PHE-PYR onto MIL-88A(Fe) was dominated by physical and monolayer surface adsorption, with a maximum adsorption capacity of 97.25 mg/kg. This strong adsorption increased pollutant concentration near active sites, accelerating photocatalytic degradation. Under optimal conditions—3% catalyst dosage, 40% soil water content, 60 min visible light irradiation, initial pollutant concentration of 200 mg/kg, and acidic soil—the total degradation efficiency reached 79.20%. Photoelectrochemical characterization revealed significant visible-light response (200–600 nm), a narrow bandgap of 3.04 eV, and favorable band structure facilitating efficient electron-hole separation. Quenching experiments identified superoxide radicals (·O2−) and holes (h+) as primary reactive species. GC-MS analysis of intermediates indicated that PYR undergoes hydroxylation, oxidation, and ring-opening to form PHE, which is further hydroxylated and oxidized, ultimately mineralizing to CO2 and H2O. This work provides an efficient strategy for remediating PAH-contaminated soils.

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MIL-88A(Fe) Adsorption-Photocatalytic Synergistic Degradation of Phenanthrene-Pyrene Composite Pollutants in Soil

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604020• Jan 15, 2026

VOCs Abatement Evaluation of Supercritical Carbon Dioxide Green Spraying in Industrial Surface Coating

Authors: LI Yawen, DING Shiwen, LI Kaiqi

Source reduction of volatile organic compounds (VOCs) from industrial emissions is a core task for air quality improvement during China's 15th Five-Year Plan period. Supercritical carbon dioxide (ScCO2) spraying technology emerges as a cutting-edge VOCs abatement approach, as it reduces both VOCs content in coatings and coating consumption. However, empirical research on coating efficiency enhancement and VOCs emission reduction at demonstration scale remains scarce. This study selected three solvent-based coating systems widely used in Chinese industry: wooden furniture-polyurethane, wooden furniture-acrylic, and metal parts-fluorocarbon. A calculation method for ScCO2 spraying efficiency and VOCs emission reduction rate was established, and emission reduction performance was systematically measured. Results indicated that compared with high-pressure airless spraying, average coating efficiency improvement rates of ScCO2 spraying at spray distances of 60 cm and 40 cm across the three scenarios were (30.62±8.75)% and (31.74±12.83)%, respectively. Correspondingly, average VOCs emission reduction rates were (62.10±1.59)% (60 cm) and (53.73±11.78)% (40 cm). VOCs content reduction rates for the three systems were 46.03%, 23.80%, and 37.60%, respectively. Diluent addition was reduced from 60% to 10%, achieving a substitution rate of 83%. The study confirms that ScCO2 spraying can achieve significant reductions in VOCs and solvent emissions in wooden furniture and metal parts coating processes, providing empirical support for industrial promotion.

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VOCs Abatement Evaluation of Supercritical Carbon Dioxide Green Spraying in Industrial Surface Coating

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Original ResearchVol. 44, Issue 4 • pp. 100-112DOI: 10.13205/j.hjgc.202604028• Jan 15, 2026

Spatio-temporal Evolution Patterns of Carbon Budget in the Xinjiang Production and Construction Corps

Authors: CHEN Dongqin, CHENG Zhiyun, XIONG Wencheng, LU Xiangjun

Accurate accounting of county-level carbon budgets and their spatio-temporal evolution is essential for formulating low-carbon development strategies tailored to each division and achieving carbon peak and neutrality goals. This study constructed a comprehensive, accurate, and unified model to measure terrestrial ecosystem carbon absorption, anthropogenic carbon emissions, and net carbon budget from 2010 to 2020 across the Xinjiang Production and Construction Corps and its divisions. Results indicate: (1) Terrestrial ecosystems consistently acted as net carbon sinks, but total carbon absorption declined slowly, with carbon sequestration capacity persistently decreasing. Cultivated land, the sole carbon source, expanded rapidly into forests and grasslands. Anthropogenic carbon emissions rose steadily, with growth rates sharply decelerating after 2015, exhibiting a spatial pattern of "high in the north and east, low in the south and west." (2) Total carbon emissions/absorptions increased rapidly from 2010 to 2015, then slowed from 2015 to 2020. Energy consumption dominated, contributing over 95% of emissions in each division and 99% regionally. High-emission zones expanded eastward from the 8th Division in the Junggar Basin; by 2020, the 8th, 13th, and 6th Divisions, occupying 26.52% of the land area, carried 78.16% of net carbon emissions, marking them as high-density emission zones. (3) Carbon balance zoning in 2020 identified one carbon sink functional zone, nine low-carbon maintenance zones, and three high-carbon optimization zones, the latter concentrated in a strip in the central-eastern region covering 26.52% of the area.

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Spatio-temporal Evolution Patterns of Carbon Budget in the Xinjiang Production and Construction Corps

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