土壤镉吸附的研究进展

Review of studies on cadmium adsorption by soils

综述了土壤镉吸附的机理和土壤pH、有机质含量、粘粒矿物类型及含量、土壤溶液中竞争性阳离子、共存阴离子、土壤温度等土壤性质对土壤镉吸附的影响;总结了土壤镉的吸附量随土壤pH增加、温度升高及有机质、铁锰氧化物和粘土矿物含量增加而增加的机理;竞争性阳离子的存在抑制镉的吸附,土壤溶液中共存阴离子对镉吸附的影响取决于阴离子种类和土壤类型。

This paper introduced mechanisms of cadmium adsorption by soil, and effects of soil properties on them, which include soil pH, organic matter content, types and content of clay minerals, competitive cations, anions and soil temperature regime. Mechanisms of the increasing amount of cadmium adsorption with increase of pH, soil temperature and the contents of organic matter, iron and manganese oxide and clay minerals were reviewed. Coexisting competitive cations inhibited cadmium adsorption. Coexisting anions either inhibited or increased cadmium adsorption, depending on anions species and soil types.