介质阻挡放电
化学
紫外线
矿化(土壤科学)
反应速率常数
降级(电信)
水溶液
光化学
环境化学
氮气
动力学
材料科学
有机化学
光电子学
物理
物理化学
电极
电信
量子力学
计算机科学
作者
Jing Lou,Jing An,Xiangyou Wang,Xiaonan Yang,Guanglu Lu,Yunlong Wang,Zitong Zhao
出处
期刊:Chemosphere
[Elsevier]
日期:2023-09-01
卷期号:335: 139021-139021
被引量:3
标识
DOI:10.1016/j.chemosphere.2023.139021
摘要
A systematic investigation of coupling dielectric barrier discharge (DBD) plasma and different ultraviolet bands (UVA, UVB, UVC, and VUV) was constructed for antibiotic-contaminant wastewater treatment. Compared with DBD, UV, or other combined DBD/UV systems, the DBD/VUV/UVC system exhibited excellent degradation and mineralization efficiencies for oxytetracycline (OTC), achieving 93.2% removal rate (reaction rate constant 1.05 min−1) and higher decarbonization efficiency (mineralization rate 0.47 mg C min−1) within 2.5 min treatment. The radical quenching tests revealed that HO⋅, O2·-, and 1O2 were all involved in the decomposition of OTC in the DBD/VUV/UVC system, among which O2·- played a dominant role. Possible degradation pathways of OTC in the DBD/VUV/UVC process were proposed using density functional theory and detected intermediates. Four indexes were used to assess the toxicity of OTC and its degraded intermediates. The inorganic anions and HA slightly reduced the degradation efficiency of the DBD/VUV/UVC system. This research provides new ideas to broaden the application of plasma and alleviate the water environment crisis.
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