硫酸亚铁铵活化过硫酸钠降解土壤吡虫啉的研究  

Degradation of imidacloprid in soil by ammonium ferrous(Ⅱ)sulfate activated sodium persulfate

作　　者：赵志燊 余磊[1] 赵杰[1] 武思齐[1,2] ZHAO Zhishen;YU Lei;ZHAO Jie;WU Siqi(Key Laboratory for Degradation Technologies of Pesticide Residues with Superior Agricultural Products in Guizhou Ecological Environment,Guiyang University,Guiyang Guizhou 550005;College of Biological and Environmental Engineering,Guiyang University,Guiyang Guizhou 550005)

机构地区：[1]贵阳学院贵州生态环境中优势农产品残留农药降解关键技术研究重点实验室,贵州贵阳550005 [2]贵阳学院生物与环境工程学院,贵州贵阳550005

出　　处：《环境污染与防治》2024年第4期519-524,共6页Environmental Pollution & Control

基　　金：贵州省普通高等学校特色重点实验室建设项目(黔教合KY字[2018] 005)。

摘　　要：为探究硫酸亚铁铵与过硫酸钠对土壤中吡虫啉降解率的影响,实验设定两种降解试剂添加量均为0.2、0.5、1.0 mmol,土壤中吡虫啉质量浓度为33.0、49.5、66.0μg/g,农作物土壤为水稻、玉米与茶叶土壤,温度为-4、25℃。结果表明:1.0 mmol过硫酸钠与0.2 mmol硫酸亚铁铵对水稻土壤中吡虫啉的降解率最佳,最高可达98.8%,且前120 min内降解速率较快。3种吡虫啉浓度的降解效果没有显著差异(p>0.05);温度对降解率的影响不显著(p>0.05)。土壤中有机碳与pH越低,越有利于过硫酸钠与硫酸亚铁铵降解土壤中吡虫啉。To investigate the effect of ammonium ferrous(Ⅱ)sulfate and sodium persulfate on the degradation efficiency of imidacloprid in soil,the experiment set the addition amounts of both degradation reagents to be 0.2,0.5,and 1.0 mmol,and the mass concentrations of imidacloprid in soil were 33.0,49.5,and 66.0μg/g,respectively,crop soil was rice,corn,and tea soil,with temperatures of-4,25℃.The results showed that the degradation rate of imidacloprid was optimal for 1.0 mmol sodium persulfate and 0.2 mmol ammonium ferrous(Ⅱ)sulfate,with a maximum of 98.8%in rice soil,and the degradation rate was faster within the first 120 minutes.There was no significant difference in the degradation effect of the three levels of imidacloprid(p>0.05),neither was temperature(p>0.05).The lower the pH value and organic carbon content,the more favorable the degradation of imidacloprid in soil by mixed reagents.

关 键 词：过硫酸钠 硫酸亚铁铵 吡虫啉 农作物土壤 降解 

分 类 号：X53[环境科学与工程—环境工程]