摘要
研究了砷、矾与镉交互作用及其对土壤吸附镉的影响 .结果表明 :江西红壤、海南砖红壤、湖南红壤和北京褐土等四种土壤吸附镉的等温线符合Freundlich方程 ,吸附常数K的大小顺序为 :北京褐土 >湖南红壤 >江西红壤 >海南砖红壤 .pH值是决定土壤吸附镉的关键因素之一 。
A series of experiments were conducted to investigate the adsorption of cadmium by soils and the effects of arsenate and vanadium on the adsorption of cadmium.It is shown that the adsorption data of the four soils studied could be fitted satisfactorily using the Freundlich equation.The Freundlich parameter K ,the adsorption coefficient,which is related to the cadmium adsorption capa city ,in dicated that the adsorption capacity of the four soils as follows is:Beijing>Hunan>Jiangxi>Hainan.pH is the most important factor to control the soil adsorption capacity.The presence of arsenate or vanadium enhances the adsorption of Cadmium by soils.This is probable due to the fact that the adsorption of arsenate and vanadium by soils could increase the negative surface charge,or that arsenate and vanadium could form complex precipitation with cadmium.
出处
《环境化学》
CAS
CSCD
北大核心
2004年第4期409-412,共4页
Environmental Chemistry
基金
中国科学院知识创新工程重大项目 (KZCX1 SW 1 9)
科技部 973计划 ( 2 0 0 2CB 41 0 80 8)资助项目
