江西省典型水稻土对铜、镉吸附解吸特性和环境风险评估  

Characteristics of Adsorption and Desorption of Copper and Cadmium by Typical Paddy Soils in Jiangxi Province and Environmental Risk Assessment

作　　者：常娟[1] 白玲[1] 冷婧[1] 汪小强[1] 

机构地区：[1]江西农业大学理学院,江西南昌330045

出　　处：《江西农业大学学报》2016年第3期581-587,共7页Acta Agriculturae Universitatis Jiangxiensis

基　　金：江西省教育厅科技研究项目(GJJ14289);江西省环境保护科研项目(JXHBKJ2013-4);江西省普通本科高校中青年教师发展计划访问学者专项资金(赣教高函(2014)15号)~~

摘　　要：以江西省2种典型水稻土(潜育型、潴育型)为试材,采用振荡平衡法研究铜、镉在水稻土中的单一和竞争吸附-解吸情况,并利用吸附分配系数对铜和镉在水稻土中的环境风险进行评估。结果表明:等比例条件下水稻土对重金属离子的吸附亲和力为铜大于镉,吸附能力潴育型水稻土明显大于潜育型;与单一体系相比,竞争条件下水稻土对重金属离子的吸附量均明显降低,但解吸率则明显升高;铜和镉的环境风险随p H升高而减小,且铜和镉共存时明显增大。Two typical paddy soils（ gley type,waterloggogenic type） in Jiangxi Province were chosen as the test material,the single and competitive adsorption of copper and cadmium by paddy soil were investigated with the batch equilibrium method,and the environmental risk of the presence of copper and cadmium in these soils was assessed with distribution coefficient.The results showed that under equal scale conditions the adsorption affinity of copper was greater than that of cadmium by paddy soil,and the adsorption ability of waterloggogenic paddy soil（ WPS） was significantly higher than the gley type paddy soil（ GTPS）.The adsorption capacity of heavy metal ions in competitive conditions was obviously lower than that in a single system,but the desorption rate was significantly elevated.The environmental risk of copper and cadmium decreased with the increase of p H,and it increased significantly when copper and cadmium coexisted.

关 键 词：水稻土 铜和镉 竞争吸附和解吸 环境风险评估 

分 类 号：S153[农业科学—土壤学]