北京林业大学学报2013，Vol.35Issue(2)：118-124,7.
野鸭湖湿地土壤对正磷酸盐的吸附特性及机理分析
Adsorption properties and mechanism of orthophosphate adsorption on soils from the Yeyahu Wetland of Beijing
摘要
Abstract
In this study, the adsorption kinetics, isothermal adsorption model of orthophosphate ( P) on soil from the Yeyahu Wetland of Beijing were investigated. The effects of pH and organic matter content on P adsorption were also analyzed. The results showed that the P adsorption equilibrium time was about five hours and Langmuir cross-shaped isothermal adsorption model well fitted the experiment data. pH had a significant influence on P adsorption. The P adsorption capability achieved the maximum value when the initial pH of the incubation solution was 8. Soil P adsorption capability increased with dissolved organic matters (DOM) increasing. When the concentration of DOM was 100 mg/L, the P adsorption capability reached the highest value and increased by 37.81% , 35.52% and 64.98% , respectively, for soil samples No. 3 , 5 and 7 when compared with no DOM experiments. The results of XRD and FT-IR analysis of soil samples before and after P adsorption experiments reveal that kaolinite involved in P adsorption process and it is a key clay component for P adsorption on the Yeyahu Wetland soil of Beijing.关键词
湿地土壤/吸附/正磷酸盐/有机质/野鸭湖湿地Key words
wetland soil/ adsorption/ orthophosphate/ organic matter/ Yeyahu Wetland分类
农业科技引用本文复制引用
张晶,李敏,杨航,孙德智..野鸭湖湿地土壤对正磷酸盐的吸附特性及机理分析[J].北京林业大学学报,2013,35(2):118-124,7.基金项目
国家自然科学基金项目(50709001)、北京市自然科学基金项目(8083029)、中央高校基本科研业务费专项资金项目(YX2010-28). （50709001）
