Cerium-Based Magnetic Y-Type Molecular Sieve for Deep Removal of Fluoride Ions from Water

• • Ce-FMSY achieved 86.2% F− removal within 30 min at Ce/Fe mass ratio 2:1 and Ce loading 1.0%, with a maximum adsorption capacity of 4.139 mg·g−1, demonstrating rapid kinetics suitable for continuous flow treatment. • • The adsorbent exhibited a saturated magnetization of 13.4 emu·g−1, enabling efficient magnetic separation, which addresses the common bottleneck of adsorbent recovery in slurry reactors. • • Over an initial pH range of 3–9, Ce-FMSY maintained a stable fluoride removal rate of 77.1%–96.8%, indicating robustness against pH fluctuations in real wastewater streams. • • After five adsorption-desorption cycles, the adsorbent retained approximately 72.3% of its initial F− removal efficiency, showing good reusability and potential for cost-effective operation.