Dieldrin and endrin removal from water by trioleinembedded adsorbent  

作　　者：HUO Jinxian LIU Huijuan QU Jiuhui RU Jia LIU Haining LI Guoting 

机构地区：[1]tate Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-environmental Science, Chinese Academy of Sciences,Beijing 100085, China

出　　处：《Chinese Science Bulletin》2005年第23期2696-2700,共5页

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.20337020);the National High-Tech Research and Development Plan(Grant No.2005AA642020);the China Postdoctoral Science Foundation.

摘　　要：A novel triolein-embedded adsorbent for re-moval of persistent organic pollutants (POPs) from water was developed. In this paper, taking dieldrin and endrin as the target pollutants, different factors (temperature, ion strength, pH, and concentration of humic acid) that affect the adsorption rate were investigated. Adsorption isotherms of these two pollutants fitted to Freundlich model well identi-fied the partition mechanism between the adsorbent and water. However, the equilibrium constant of dieldrin was larger than that of endrin due to larger octanol-water coeffi-cient of dieldrin. Adsorption rate of dieldrin increased with the increase of temperature, the decrease of ion strength, pH and concentration of humic acid, whereas adsorption rate of endrin decreased with the increase of temperature and pH. Humic acid firstly increased, and then decreased the adsorp-tion rate of endrin. Ion strength hardly affected the adsorp-tion rate of endrin.A novel triolein-embedded adsorbent for removal of persistent organic pollutants （POPs） from water was developed. In this paper, taking dieldrin and endrin as the target pollutants, different factors （temperature, ion strength, pH, and concentration of humic acid） that affect the adsorption rate were investigated. Adsorption isotherms of these two pollutants fitted to Freundlich model well identified the partition mechanism between the adsorbent and water. However, the equilibrium constant of dieldrin was larger than that of endrin due to larger octanoi-water coefficient of dieldrin. Adsorption rate of dieldrin increased with the increase of temperature, the decrease of ion strength, pH and concentration of humic acid, whereas adsorption rate of endrin decreased with the increase of temperature and pH. Humic acid firstly increased, and then decreased the adsorption rate of endrin. Ion strength hardly affected the adsorption rate of endrin.

关 键 词：含氯杀虫剂 狄氏剂 异狄氏剂 三油精 吸附剂 醇-水系数 持久性有机污染物 污水处理 

分 类 号：X703[环境科学与工程—环境工程]