Degradation of clothianidin by heat-activated potassium persulfate process

doi:10.11894/1005-829x.2016.36(3).066

Abstract

Abstract:

The influences of various influential factors on the degradation of clothianidin by heat-activated potassium persulfate process are discussed, and the kinds of active free radicals in the reaction system are detected. The results show that the degradation of clothianidin complies with the rules of pseudo first-order reaction kinetics. With the increase of reaction temperature and S₂O₈^2- concentration, the degradation rate of clothianidin increases. Under acidic and neutral pH conditions, the degradation rate is higher than that under basic condition. The existence of Cl^- and HCO₃^- in water solution has influence on the clothianidin degradation result. The free radical probe experiments inspect and verify that there are two kinds of free radicals(SO₄^-·, ·OH)simultaneously in the reaction system. Under acidic and neutral conditions, the main radicals are SO₄^-·, while under basic condition ·OH content is higher.

Key words: clothianidin, potassium persulfate, pesticide wastewater

摘要：

探讨了多种影响因素对热激活过硫酸钾技术降解噻虫胺的影响,并检测反应体系中的活性自由基种类。结果表明,噻虫胺的降解符合准一级反应动力学规律。提高反应温度和S₂O₈^2-浓度,噻虫胺的降解速率都迅速增大;酸性和中性条件下的降解速率高于碱性条件;水溶液中Cl^-和HCO₃^-的存在影响噻虫胺的降解效果;自由基探针实验验证了反应体系中同时存在SO₄^-·和·OH两种自由基,酸性和中性条件下,以SO₄^-·为主,碱性时·OH含量较多。

关键词: 噻虫胺, 过硫酸钾, 农药废水

CLC Number:

X703.1

Zheng Liqing, Lin Yidong, Li Chunli, Zhao Yuan. Degradation of clothianidin by heat-activated potassium persulfate process[J]. INDUSTRIAL WATER TREATMENT, 2016, 36(3): 66-70.

郑立庆, 林宜动, 李春立, 赵源. 利用热激活过硫酸钾技术降解噻虫胺[J]. 工业水处理, 2016, 36(3): 66-70.

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URL: https://www.iwt.cn/EN/10.11894/1005-829x.2016.36(3).066

https://www.iwt.cn/EN/Y2016/V36/I3/66

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