Activation CuFe 2 O 4 by Hydroxylamine for Oxidation of Antibiotic Sulfamethoxazole

作者：Jianfei Yan, Jiali Peng, Leiduo Lai, Fangzhou Ji, Yunhong Zhang, Bo Lai, Qixuan Chen, Gang Yao, Xi Chen, Liping Song · 发表于：Environmental Science & Technology · 年份：2018 · DOI：10.1021/acs.est.8b03340 · 被引用次数：252 · 研究领域：Advanced oxidation water treatment、Advanced Photocatalysis Techniques、Pharmaceutical and Antibiotic Environmental Impacts

A new potential oxidation process is provided by CuFe 2 O 4 /hydroxylamine (HA) system for degradation of antibiotics in water. The CuFe 2 O 4 /HA system can generate reactive oxygen species (ROS) for the degradation of sulfamethoxazole (SMX). The addition of radical scavengers, including benzoquinone (BQ) and catalase (CAT), inhibited the oxidation of SMX in CuFe 2 O 4 /HA system. Electron transfer in the CuFe 2 O 4 /HA system played a key function for the generation of ROS and the degradation of SMX. The main ROS, was the superoxide radical (O 2 •– ) mainly generated from adsorbed oxygen (O 2(A) ), which came from the oxidation of the lattice oxygen (O 2– (L) ) in CuFe 2 O 4 . The CuFe 2 O 4 /HA system was effectively applicable for a broad pH range (approximately 5–10). In addition, the activation mechanism for CuFe 2 O 4 /HA system was studied with the target contaminant SMX. Finally, the degradation pathways of SMX were proposed under the optimal conditions in CuFe 2 O 4 /HA system.