铁、铝氧化物和土壤对苄嘧磺隆的吸附  

ADSORPTION OF BENSULFURON-METHYL IN OXIDES AND SOILS

作　　者：刘永红[1] 叶发兵[1] 岳霞丽[1] 董元彦[1] 

机构地区：[1]华中农业大学理学院,武汉430070

出　　处：《环境化学》2006年第6期714-717,共4页Environmental Chemistry

基　　金：国家自然科学基金重点资助项目(No.49831005).

摘　　要：用平衡吸附法研究了苄嘧磺隆在两种土壤(广州赤红壤、湖南红壤)和两种人工合成氧化物(针铁矿、铝氧化物)中的吸附,以及pH对吸附的影响.结果表明:(1)用Langmu ir,Freund lich和Temk in等温方程描述供试样品对苄嘧磺隆的吸附,其中Freund lich吸附等温方程拟合的结果较佳.在苄嘧磺隆的实验浓度范围内和一定的pH条件下,吸附苄嘧磺隆的量随其浓度的升高而增加,其顺序为:铝氧化物>湖南红壤>针铁矿>广州赤红壤.(2)苄嘧磺隆在供试样品中的吸附量随溶液pH值的升高而减小.the isothermal data were described with Langmuir, Freundlich, Temkin equations, but the Freundlich equation was the optimal one. Within the range of bensulfuron-methyl concentrations used in experiment, the amount of adsorption increased with the increase concentrations of BSM, and in some extent of pH, the amount of adsorption as followed ： latosolic red soil 〈 goethite 〈 red-soil 〈 Al oxide. Besides, the amount of BSM adsorption in the oxides decreased with the increase pH of the solution. The trend of the decrease was different because of their characteristics and composition.

关 键 词：土壤 氧化物 吸附 苄嘧磺隆 

分 类 号：X132[环境科学与工程—环境科学]