【作者】 赵启红； 钱卉； 张倩倩； 彭磊； 杨小弟；

【Author】 Qi-Hong Zhao,Hui Qian,Qian-Qian Zhang,Lei Peng,*Xiao-Di Yang Nanjing Normal University,210097,Nanjing

【机构】 南京师范大学化学与环境科学学院；

【Abstract】 Sodium percarbonate (SPC) is a highly active compound which is safe to the environment and used widely. In present thesis, its efficiency on the degradation of organophosphorus pesticides was studied and a promising method for the degradation of the pesticides were obtained. The degradation rates of 20μg/mL dichlorvos, 20μg/mL omethoate and 20μg/mL dimethoate with 40mg SPC after 8h treatment were 100%,100%,74.7%respectively, which was much faster than their natural degradation rates. The effect of different initial pH were studi ed, the result obtained showed that the pesticides disappearance was quite slow at the pH 5,and fast at alkaline or high acidity,in which a rapid concentration drop was observed at high basic condition. The influence of the reaction time, the temperature were also studied. As time went by, the degradation rates increased. At 20℃ ,the degradation of dichlorvos , omethoate and dimethoate were 47.37%、40.88%、34.94% respectively., when at 40 ℃ their rates were 90.92%、69.50%、62.26% .更多还原