林丹
介质阻挡放电
六氯环己烷
化学
分解
降级(电信)
电子顺磁共振
激进的
环境化学
光化学
污染物
等离子体
杀虫剂
有机化学
物理化学
电信
物理
电极
核磁共振
量子力学
计算机科学
农学
生物
作者
Yanan Liu,Jinping Duan,Quan Zhou,Luxiang Zhu,Nan Liu,Zhuyu Sun
出处
期刊:Chemosphere
[Elsevier]
日期:2023-10-01
卷期号:338: 139607-139607
标识
DOI:10.1016/j.chemosphere.2023.139607
摘要
Lindane is a broad-spectrum organochlorine insecticide which has been included in the persistent organic pollutants (POPs) list together with its two hexachlorocyclohexane (HCH) isomers. Due to its continuous use in the past decades, the environmental impacts of HCHs are still severe now. Therefore, in the present study, dielectric barrier discharge (DBD) plasma was used as an advanced oxidation process for the destruction of HCHs in water. The result indicated that in air-DBD system, over 95.4% of the initial 5 mg L−1 lindane was degraded within 60 min. Moreover, DBD plasma displayed high degradation efficiencies of other HCH isomers including α, β, and δ-HCH. Electron spin resonance spectra, scavenging experiments and theoretical calculations revealed that the synergistic effects of various reactive species were the main reason for the high efficiency of DBD plasma. For instance, both hydroxyl radicals (•OH) and electrons (e−) could initiate the degradation of HCHs, while other reactive species such as 1O2 and ONOOH played important roles in the decomposition of intermediates. Therefore, the present study not only provided an effective approach for the treatment of HCHs, but also revealed the underlying mechanism based on in-depth experimental investigation and theoretical calculation.
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