Degradation of imidacloprid in soil by ammonium ferrous(Ⅱ)sulfate activated sodium persulfate
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 66.0 μg/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.
万方数据
维普
