化学
降级(电信)
双金属片
催化作用
活性氧
硫酸盐
羟基自由基
电子转移
磺胺甲恶唑
激进的
光化学
有机化学
生物化学
电信
抗生素
计算机科学
作者
Xin Qing,Siqi Liu,Shixiang Lu,Zhenyu Chen,Ping-Hsuan Han,Shuaishuai Xin,Qianwen Wang,Guocheng Liu,Chengzhi Zhou,Guocheng Liu,Qinghua Yan
标识
DOI:10.1016/j.cej.2023.144453
摘要
In this study, a fast and efficient Cu2Fe0.5Al0.5-LDH/PMS water purification system was constructed to degrade sulfamethoxazole (SMX). The optimized Cu2Fe0.5Al0.5-LDH/PMS reaction system degraded 50% SMX for only 0.5 min, and 98.25% SMX for 10 min. The advanced characterization techniques proved that the abundant hydroxyl groups of Cu2Fe0.5Al0.5-LDH can form ≡M−(O)OSO3− complexes with PMS, resulting in reactive oxygen species (ROS) and promoting SMX degradation. Moreover, the electron transfer between the active bimetallic components played a synergistic role in the generation of ROS species. Compared with the electron transfer degradation mechanism, ROS mechanism contributed more to SMX degradation, in which surface-bound SO4− was the dominated active species. The possible degradation pathway and intermediate toxicity of SMX were proposed. This work provided a strategy to fully explore the catalytic degradation mechanism of heterogeneous catalysts in wastewater purification.
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