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.
出处
《环境化学》
CAS
CSCD
北大核心
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).
关键词
土壤
氧化物
吸附
苄嘧磺隆
soils, oxides, adsorption, bensulfuron-methyl.
