摘要
研究了腐殖质存在条件下膨润土对两种有机磷农药(毒死蜱和辛硫磷)的吸附作用及腐殖质含量、吸附时间、膨润土用量、农药浓度、pH等因素对吸附作用的影响。结果发现:膨润土对毒死蜱和辛硫磷的吸附能力随腐殖质含量的升高而升高,分别在腐殖质含量为8%,6%时达最大,之后处于持平状态;膨润土对毒死蜱和辛硫磷的吸附分别在1.5 h和2 h时达到平衡,可用双速率吸附模型解释;腐殖质含量固定时膨润土用量加大对两种农药的去除率均增加,但吸附量随之下降;随着农药浓度的升高,膨润土对两种有机磷农药的吸附量加大,但去除率下降;pH升高对吸附有利。
The adsorption of bentonite on two organophosphorous pesticides （Chlorpyrifos and Phoxim） in existence of humus was investigated, analyzing the effects of humus content, adsorption time, the amount of bentonite, pesticide concentration, and pH. The results shows that firstly the adsorption capacity of bentonite on Chlorpyrifos and Phoxim were increasing when humus content was increasing, reaching the top at the humus content 8% and 6% respectively, then drop. The adsorption achieved balance at 1.5 h of Chlorpyrifos and 2 h of Phoxim, which can be explained by double rate adsorption model. When humus content was fixed, the removal rates of bentonite on the two pesticides were increasing but adsorption amount were decreasing with increasing of the amount of bentonite. The adsorption amount of bentonite on the two pesticides were increasing when concentration of pesticide was increasing while the removal rates decreasing, pH was propitious to the adsorption.
出处
《环境科学与管理》
CAS
2009年第12期48-51,共4页
Environmental Science and Management
基金
江苏省重点自然科学基金资助项目(BK2001208)
江苏省高校自然科学基金资助项目(04KJD610093)资助
