敌敌畏在颗粒物上吸附的支配因素  

Factors dominating adsorption of dichlorphos on the particulates.

作　　者：哈斯其木格[1] 杨宏伟[1] 

机构地区：[1]内蒙古师范大学化学与环境科学学院,内蒙古呼和浩特010022

出　　处：《农村生态环境》2005年第2期62-65,共4页Rural Eco-Environment

基　　金：内蒙古高等学校自然科学基金资助项目 (DZ99152 );内蒙古自然科学基金资助项目(批准号: 20001301)

摘　　要：研究了敌敌畏在颗粒物(呼和浩特土壤和黄河水体沉积物)上的吸附行为,探讨了颗粒物性质如有机质含量、粘粒含量、阳离子交换量(CEC)、pH值和离子强度等因素对吸附的影响。结果表明:敌敌畏在2种颗粒物上的吸附过程均符合一级动力学规律,可用Freundlich等温式描述,吸附常数Kd为5. 822 0和11. 738 8;颗粒物性质与吸附常数的相关分析发现:支配敌敌畏在颗粒物上吸附的主要因素是有机质含量、pH值和离子强度,随着pH值的增加和离子强度的降低,敌敌畏在2种颗粒物上的吸附量增大。Adsorption behaviors of DDVP on particulates(Huhhot soil and Yellow River sediment)were studied.Influences of properties of the particulates,such as organic matters,clay,CEC,pH value and ionic strength,on adsorption were discussed.Results show that dynamic processes of the adsorption of dichlorphos on the particulates(soil and sediment)consisted with the first order kinetics and could be described with the Freundlich isotherm.Its adsorption constant K_d was (5.820 0) and 11.738 8,respectively.Investigation of K_d vs.properties of the particulates discovered that soil organic matters,the pH and ionic strengths were the factors dominating adsorption of DDVP on the particulates,and the adsorption increased with the increase in pH value but the decrease in ionic strength.

关 键 词：敌敌畏 吸附 颗粒物 

分 类 号：S482.33[农业科学—农药学]