Work

Ce-modified NH2-MIL-88B enhances catalytic ozonation for effective antibiotic degradation

Year: 2025

Type: article

Abstract: A Ce-doped NH 2 -MIL-88B(Fe) composite (Ce-NM8B) was synthesized via a hydrothermal method and used to catalyze ozone oxidation to degrade levofloxacin (LEF) in water. Moreover, comprehensive characterization of Ce-NM8B, including crystal structure, surface morphology , and electrochemical properties , was performed using XRD , SEM, BET, XPS , FT-IR, and ICP techniques. As a result, the Ce-NM8B/O 3 system achieved an 84.2 % degradation of 10 mg/L LEF within 40 min under optimal conditions (0.20 g/L catalyst dosage, 0.20 L/min ozone flow, pH 7). Furthermore, EPR and radical quenching experiments confirmed the generation of ·OH, O 2 · - , and 1 O 2 species, in addition to direct ozone oxidation and catalytic adsorption. Additionally, HPLC-MS analysis identified key degradation pathways, including piperazine, quinolone, and morpholine ring cleavage, alongside decarboxylation, defluorination, and demethylation. In terms of toxicity, evaluation using T.E.S.T. revealed that intermediate products exhibited reduced toxicity. Moreover, Ce-NM8B demonstrated stable performance over three cycles. Finally, the system's applicability and practical potential were confirmed through the degradation of several antibiotics and testing in natural water substrates.

Source: Environmental Research

DOI: 10.1016/j.envres.2025.121388

Authors: Ying Yang, Shengwen Zhou, Yaoru Mao, Yuerong Zhou, Xiuwen Cheng

Institution: Lanzhou University

Language: English

Topic: Advanced oxidation water treatment

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $3,880