Environmental Chemistry•2026•DOI: 10.7524/j.issn.0254-6108.2025010802
Ozone (O3) pollution is a prominent issue in the Guanzhong Plain, necessitating effective control of its precursors, particularly volatile organic compounds (VOCs). However, studies on VOC pollution characteristics at the county level are scarce. To investigate the summer VOC pollution characteristics and sources in high-altitude towns of the Guanzhong Plain, continuous monitoring of 53 typical VOC species was conducted at two sites in Changwu County, Xianyang City (elevation 1200 m). The spatiotemporal variations of ambient VOCs and their ozone formation potential (OFP) were analyzed, and source apportionment was performed using the Positive Matrix Factorization (PMF) model. Results showed that average total VOC (TVOCs) concentrations at the Changwu Government and Changwu Middle School sites were 60.04×10⁻⁹ and 83.28×10⁻⁹, respectively. Oxygenated VOCs (OVOCs) dominated, accounting for 55.14% and 62.91% of TVOCs, followed by alkenes, aromatic hydrocarbons, and halogenated hydrocarbons. Industrial sources contributed the most (43.2%) to VOC emissions in Changwu County, but site-specific differences were observed: the Government site was primarily influenced by solvent use (30.7%) and motor vehicles (19.1%), while the Middle School site was dominated by domestic sources (27.6%) and motor vehicles (20.0%). The average OFP values at the Government and Middle School sites were 258.84×10⁻⁹ and 378.04×10⁻⁹, respectively, with alkenes and OVOCs as the main contributors, originating from industrial emissions, solvent use, and biogenic sources. EKMA curves indicated that Changwu County was in a VOC-limited regime during the observation period, confirming the effectiveness of VOC control for ozone mitigation. These findings provide scientific guidance for local ozone management and offer a paradigm for precise ozone pollution control in county-level regions of the Guanzhong Plain.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3933-9
The global cold chain consumes vast amounts of energy and emits greenhouse gases, while many regions lack proper refrigeration. To address this, we developed a dual-layer electrospun membrane (PZ-PML) for energy-free fruit preservation. The top PVDF-HFP/ZIF-8 layer offers 97.64% solar reflectance and 92.5% mid-infrared emissivity, providing 70 W/m2 radiative cooling. The bottom PAN/MIL-101/LiCl layer, with 2.18 g/g water uptake at 80% RH, delivers ~156 W/m2 evaporative cooling, lowering surface temperature by 6.1 °C under ~400 W/m2 irradiation. The membrane also shows ≥99% antibacterial efficiency against E. coli and S. aureus. Applied to strawberries, it reduced dehydration to 20.2% after 9 days, compared to 68.2% and 74.4% in controls. Additionally, it demonstrates durability, superhydrophobicity, and UV stability. This scalable solution offers energy-free fruit cooling, reducing postharvest losses while maintaining quality and safety.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3989-4
Organic-inorganic hybrid metal halides (OIMHs) based on Cu(I) ions exhibit broad application prospects in stimulus-responsive luminescent materials due to their rich structural diversity and highly adjustable electronic states. However, achieving sensitive and broad-temperature-range thermal responses remains a significant challenge. Here, we synthesize a zero-dimensional warm white-light emitting OIMH, MPC-W ((C9H20N2O)4(Cu2I4)(Cu2I6)(H2PO2)2), using 4-morpholinopiperidine (4-MP) and CuI. MPC-W features hybrid structures of [Cu2I4]2− and [Cu2I6]4−. The coexistence of three luminescent mechanisms—organic cluster luminescence (CL), self-trapped exciton (STE) emission of [Cu2I6]4−, and cluster-centered (CC) state luminescence of [Cu2I4]2−—endows MPC-W with temperature- and excitation-wavelength-dependent dynamic luminescence. From 77 to 297 K, the luminescence color continuously tunes from blue to cyan, green, yellow-green, and white. In the range of 217–463 K, MPC-W exhibits abnormal luminescence enhancement with increasing temperature. Upon chemical stimuli, MPC-W reversibly transforms into blue-emitting MPC-B ((C9H20N2O)Cu2I4) and yellow-emitting MPC-Y ((C9H18N2O)7Cu8I8). These dynamic luminescent properties position MPC-W for applications in temperature sensing, optical anti-counterfeiting, and password locks. This work provides new insights for developing wide-temperature-responsive multifunctional intelligent luminescent materials.
Chinese Journal of Environmental Engineering•2026•DOI: 10.12030/j.cjee.202408057
Urban waterlogging, exacerbated by climate change and rapid urbanization, poses increasing risks, particularly in coastal low-lying areas with dense river networks. This study simulated waterlogging in the Shajing River drainage area of the Maozhou River basin, Shenzhen, using the SOBEK hydrodynamic model. Under a 5-year return period rainfall, 47 manholes overflowed and 31.29% of stormwater pipes operated at full capacity. Twelve waterlogging-prone points were identified: eight due to insufficient drainage capacity and five due to river backflow from low elevation. Two optimization schemes were compared: enlarging pipe diameters and implementing Low Impact Development (LID) measures. Pipe enlargement reduced overflowing manholes by 32 and full-flow pipe length by 20%, effectively decreasing surface ponding. LID measures reduced overflowing manholes by only 4 and full-flow pipe length by 1.5%, but decreased maximum flooding depth by nearly 1 m, alleviating drainage system burden. The study highlights the complex causes of coastal urban waterlogging, especially river backflow under tidal influence, and recommends considering sea-level rise and storm surge in drainage design. The findings provide valuable references for attributing waterlogging causes and planning drainage network upgrades in coastal cities.
Environmental Chemistry•2026•DOI: 10.7524/j.issn.0254-6108.2025041409
High-entropy alloys (HEAs) have emerged as promising catalytic materials for organic wastewater treatment owing to their unique catalytic activity, structural stability, and corrosion resistance. This review systematically elaborates the physicochemical properties of HEAs and their multi-path degradation mechanisms, with emphasis on Fenton reactions, photocatalysis, and tribocatalysis. The influence of mainstream preparation techniques—mechanical alloying, arc melting, gas atomization, and impregnation adsorption—on catalytic performance is critically compared. To overcome practical bottlenecks such as low powder recovery and rapid active-site deactivation, synergistic optimization strategies including metal doping, morphological modification, and composite engineering are proposed. The review identifies key challenges in enhancing degradation efficiency, scaling up production, and designing composite materials, and outlines future research directions for HEAs in wastewater treatment. This work provides a theoretical foundation for developing efficient and stable HEA-based environmental catalysts.
Journal of Environmental Engineering Technology•2026•DOI: 10.13205/j.hjgc.202608024
Microbial remediation is a widely used technology for treating chromium pollution in groundwater. This study conducted a bibliometric analysis of 441 papers from the Web of Science Core Collection (2010–2024) using CiteSpace, VOSviewer, and Pajek. The publication trend increased over the period, with three developmental stages identified: early (2010–2016) focusing on basic treatment methods, intermediate (2017–2019) on intrinsic mechanisms, and recent (2020–2024) on process optimization. Biological adsorption and reduction were identified as the primary mechanisms. Correlation and principal component analyses of environmental factors (temperature, pH, initial Cr concentration, reaction time) revealed temperature as the key factor affecting remediation efficiency. The removal efficiencies and mechanisms of various dominant bacterial strains were summarized to guide strain selection. Future research should focus on microbial community synergy, nanomaterial integration, and environmental optimization to enhance remediation efficiency.
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3978-0
All-polymer solar cells (all-PSCs) are promising for flexible and wearable electronics due to their excellent stability and mechanical stretchability. However, achieving high performance remains challenging due to difficulties in controlling the morphology of polymer blend films. In this study, a novel polymer donor, PBDTF-DTP, incorporating a weak electron-withdrawing yet large-dipole-moment dithienylphthalimide (DTP-2T) unit, was rationally designed and synthesized for ternary all-PSCs. Introducing PBDTF-DTP as a guest donor enables complementary light absorption and deepens the highest occupied molecular orbital level, simultaneously improving short-circuit current density (J_SC) and open-circuit voltage (V_OC). The large dipole moment of DTP-2T increases the dielectric constant, suppressing non-radiative energy loss and further boosting V_OC. Notably, PBDTF-DTP exhibits a relatively higher molecular electrostatic potential than the host donor, effectively tuning compatibility with both polymer donor and acceptor, regulating blend morphology, and promoting formation of a nanoscale fibrillar network. This optimized morphology facilitates efficient charge generation and transport while suppressing charge recombination. Consequently, ternary all-PSCs based on PM6:PBDTF-DTP:PYIT achieve a synergistic enhancement in J_SC, V_OC, and fill factor, yielding a remarkable power conversion efficiency of 18.01%, significantly higher than that of binary PM6:PYIT devices (15.51%). This study demonstrates that combining electrostatic potential optimization with a ternary strategy provides an effective approach to regulate morphology and achieve high-efficiency all-PSCs.