红壤中稀土元素的有效性及其环境意义

Availability Research of Rare Earth Element (REE) in Red Soils and Its Environmental Significance

摘要: 研究了不同母质来源的红壤剖面层中稀土元素结合形态的变化以及可溶态稀土元素含量的变化，结果表明，红壤中稀土元素的有效性较其他类型土壤为高，可溶态稀土元素在土壤稀土总量中所占的比例可达6%~7%左右，稀土的有效性主要与土壤中粘土矿物及有机质等组分对稀土的吸附有关。

Abstract: Changes of chemical forms of REE in the profiles of red soils with different parent materials and changes of soluble REE contents show that availability degree of REE in red soils is higher than that in other soils, the mean total content of soluble REE accounts for 6%～7% of the total amounts of REE, and the main source of available REE is correlative to the adsorption of clay minerals and organic matter in red soils to REE.