Unraveling the synergistic effect of adsorption-photocatalysis in magnetically recyclable Fe3O4/metal-organic gels/sodium alginate beads for chlortetracycline hydrochloride elimination
CHEMICAL ENGINEERING JOURNAL(2024)
摘要
The development of highly efficient and easily recyclable materials remains at the forefront of chlortetracycline hydrochloride (CTC) remediation. Herein, two magnetic metal-organic gels (Fe3O4/Fe-MOG and Fe3O4/Al-MOG) are constituted by an ultrafast room-temperature synthesis of MOGs on the surface of carboxylated Fe3O4, affording exceptional adsorption-photocatalysis abilities towards CTC under visible light irradiation, along with favorable magnetic separation capabilities. Meanwhile, the proposed synergistic mechanisms of adsorption-photocatalysis, the probable degradation pathways of CTC, and the underlying toxicity evaluation of in-termediates are expounded. More importantly, we ingeniously develop Fe3O4/MOGs/SA beads with sodium alginate (SA) as the backbone and magnetic MOGs as the reaction center, which minimizes the loss of powdered Fe3O4/MOGs and ameliorates the recyclability. Attractively, Fe3O4/MOGs/SA beads achieve long-term contin-uous operation for CTC degradation in various water samples under visible light irradiation. Overall, this work highlights a new possibility for devising immobilized magnetic MOGs with adsorption-photocatalysis synergies in actual and large-scale wastewater remediation.
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关键词
Magnetic MOGs,Sodium alginate,Antibiotic,Adsorption-photocatalysis,Degradation pathways,Toxicity assessment
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