利用热激活过硫酸钾技术降解噻虫胺

摘要

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 in-crease of reaction temperature and S2O82-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 in-spect 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.%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S2O82-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.