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Peroxymonosulfate Activation by Cu–OMS-2 Nanofibers for Efficient Degradation of N-Containing Heterocycles in Aquatic Solution

化学 催化作用 降级(电信) 水溶液 核化学 矿化(土壤科学) 人体净化 吸附 超纯水 苯并三唑 无机化学 环境化学 化学工程 有机化学 废物管理 电信 计算机科学 氮气 工程类
作者
Yongxin Chen,Zihan Yang,Jun Cui,Yingqin Wu,Xilong Zhang,Xiang Liu
出处
期刊:Langmuir [American Chemical Society]
卷期号:39 (47): 16954-16964 被引量:1
标识
DOI:10.1021/acs.langmuir.3c02819
摘要

In this research, the degradation of different types of N-containing heterocycle (NHC) contaminants by Cu-OMS-2 via peroxymonosulfate (PMS) activation in an aqueous environment was investigated. First, the effects of different reaction parameters were optimized using benzotriazole (BTR) as the model contaminant, and the optimal reaction conditions were 8 mM PMS, 0.35 g/L Cu-OMS-2, and 30 °C. Nine different types of NHC contaminants were effectively degraded under these reaction conditions, and the degradation efficiencies and the mineralization rates of those NHCs were more than 68 and 46%, respectively. Moreover, the Cu-OMS-2/PMS process presented excellent performance at a wide pH ranging from 3.0 to 11.0 and in the presence of some representative anions (NO3- and SO42-) and dissolved organic matter (fumaric acid). The inhibition sequence of anions on BTR removal during the Cu-OMS-2/PMS process was H2PO4- > HCO3- > Cl- > CO32- > NO3- > SO42-. It was also found that 74.5 and 71.3% BTR degradation rates were achieved in actual water bodies, such as tap water and Yellow River water, respectively. Besides, the Cu-OMS-2 heterogeneous catalyst had excellent stability and reusability, and the degradation rate of BTR was still at 77.0% after 5 cycles. Finally, electron paramagnetic resonance analysis and scavenging tests showed that 1O2 and SO4- • were the primary reactive oxygen species. Accordingly, Cu-OMS-2 nanomaterial was an efficient and sustainable heterogeneous catalyst to activate PMS for the decontamination of BTR in water remediation.
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