ICP-AES studies on characteristics of distribution,accumulation and transportation of rare earth elements in soil-Dicranopteris dichotoma system

Abstract

Abstract: The contents of La,Ce,Pr,Nd,Sm,Gd,Dy,Yb and Y in soils and Dicranopteris dichotoma collected from 4 rare earth mining areas and 1 non-mining area in south Jiangxi Province were determined using the inductively coupled plasma atomic emission spectrometry(ICP-AES) method,and the distribution patterns and transportation characteristics of the rare earth elements (REEs) in soil profiles and Dicranopteris dichotoma tissues were discussed.The results showed that the REEs contents in the C horizon the soils were the highest,but Ce was relatively concentrated in A horizon.The total amount of the REEs in Dicranopteris dichotoma tissues was in order of leaf>root>stem>leaf stalk,but the distribution patterns of individual REE were various,ie.,La,Ce,Pr and Nd,leaf>root>stem>leaf stalk,Sm and Gd,leaf>root>stem>leaf stalk or root>leaf>stem>leaf stalk,and Dy,Yb and Y,leaf>root>stem>leaf stalk,root>leaf>stem>leaf stalk,or root>stem>leaf>leaf stalk.The REEs were obviously fractionated in their transportion processes in Dicranopteris dichotoma tissues and heavy REEs in stems,leaf stalks and leaves of the plant were relatively poor.

Key words: ICP-AES, Rare earth elements, Soil, Dicranopteris dichotoma, Distrbution, Transportation

CLC Number:

Q946.91

WEI Zhenggui, WAN Shoukang, ZHANG Xun, HONG Fashui, ZHAO Guiwen, TAO Ye. ICP-AES studies on characteristics of distribution,accumulation and transportation of rare earth elements in soil-Dicranopteris dichotoma system[J]. Chinese Journal of Applied Ecology, 2001, (6): 863-866.

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