稀土
稀土
희토
CHINESE RARE EARTHS
2001年
3期
1-5
,共5页
稀土元素%形态分组%土壤
稀土元素%形態分組%土壤
희토원소%형태분조%토양
本文提出了土壤中稀土元素形态分组的方法，对我国20种土壤中稀土元素形态分组特征进行了评价。结果表明，土壤中稀土元素主要以残渣态存在，其次为氧化铁结合态和松结有机态。在碱性土壤中碳酸盐结合态仅次于氧化铁结合态，中酸性土壤中紧结有机态仅次于松结有机态，而碱性土壤中紧结有机态极低。土壤中交换态和氧化锰结合态稀土元素均比较低。
本文提齣瞭土壤中稀土元素形態分組的方法，對我國20種土壤中稀土元素形態分組特徵進行瞭評價。結果錶明，土壤中稀土元素主要以殘渣態存在，其次為氧化鐵結閤態和鬆結有機態。在堿性土壤中碳痠鹽結閤態僅次于氧化鐵結閤態，中痠性土壤中緊結有機態僅次于鬆結有機態，而堿性土壤中緊結有機態極低。土壤中交換態和氧化錳結閤態稀土元素均比較低。
본문제출료토양중희토원소형태분조적방법，대아국20충토양중희토원소형태분조특정진행료평개。결과표명，토양중희토원소주요이잔사태존재，기차위양화철결합태화송결유궤태。재감성토양중탄산염결합태부차우양화철결합태，중산성토양중긴결유궤태부차우송결유궤태，이감성토양중긴결유궤태겁저。토양중교환태화양화맹결합태희토원소균비교저。
A sequential extraction procedure was developed for fractionation of rare earths in soil.RE forms in 20 types of soils have been studied using this method.The result shows that the main part of total RE in soil is in residue form,its distribution ratio accounts to 56.59±10.37%.The followings are Fe oxide bond and weak bond in organic matter forms.The amount of carbonate bond and strong bond in organic matter forms depends on soil types.Exchangeable and Mn oxide bond forms are low in soils.Exchangeable forms vary strongly in different types of soils,its C.V.could be 122% in 20 types of soils.
