摘要
研究了敌敌畏在2种土壤(东胜土壤和杭锦2#土)中的吸附特性,观察了土壤的性质如w(有机质),w(粘粒),CEC,pH和离子强度等因素对吸附的影响.结果表明:敌敌畏在2种土壤中的吸附过程符合一级动力学规律,可用线性等温式描述,分配常数Kd分别为0.119 0和0.369 3 mL/g;敌敌畏在杭锦2#土中的吸附量比较大,在东胜土壤中的吸附速率比较快.土壤性质与分配常数的相关分析发现:支配敌敌畏在土壤中吸附的主要因素是pH和离子强度,随着pH的增加和离子强度的降低,敌敌畏在2种土壤中的吸附量增大.
The adsorption characteristic of dichlorphos on the soils （Dong Sheng soil and Hang Jin 2^# soil） was studied. The influence properties of soils, such as organic matters, granule of viscosity, CEC, pH and ionic strength on adsorption were observed. It was shown that the adsorption dynamic process of dichlorphos on both soils was first order reaction and the adsorption isotherms were linear on both soils, with adsorption constant Kd being O. 119 0 and 0.369 3 mL/g, respectively; the adsorption quantity was greater on the Hang Jin 2^# soil and the adsorption rate was quicker on the Dong Sheng soil ; investigation of Kd versus properties of the soils discovered that pH and ionic strength were the factors dominating adsorption of dichlorphos on the soils, and the adsorption increased with the increase in pH but the decrease in ionic strength.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2006年第2期35-38,共4页
Research of Environmental Sciences
基金
国家自然科学基金资助项目(20467002)
内蒙古高等学校自然科学基金资助项目(ZD991502)
关键词
敌敌畏
吸附
土壤
dichlorphos
adsorption
soil
