赣南稀土矿区农田土壤环境有效态稀土的分布  

The effective REES distribution in the farmland soil environment of rare earth mining region in southern Jiangxi

作　　者：张大超[1] 张菊花[1] 刘晓来[1] 关大明[1] 徐孝义[1] 胡姣姣[1] 

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2013年第3期87-90,共4页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(50904029)

摘　　要：以赣南离子型稀土矿区农田土壤环境受稀土金属污染为调查研究对象,采用矿区土壤采样分析测试的研究方法,对受稀土资源开发活动影响的矿区农田土壤环境的有效态稀土分布进行调查研究.结果表明:在稀土资源开发活动的影响下,稀土金属在农田土壤中累积效应显著;相较对照区土壤,矿区轻重稀土比显著增大;矿区稀土形态分布呈紧结有机态﹥可交换态﹥铁锰氧化物态﹥松结有机态﹥专性吸附与碳酸盐态﹥水溶态;矿区中,有效态稀土、轻稀土、重稀土沿土壤层自上而下呈A(淋溶层)﹥B(淀积层)﹥C(母质层)分布;矿区土壤稀土可交换态、松结有机态、专性吸附与碳酸盐态和紧结有机态呈A>B>C分布,水溶态和铁锰氧化物态呈B>A>C分布.This paper studies the effective ion-adsorption rare earth elements distribution in the farmland soil environment of rare earth mining region in southern Jiangxi province by testing the soil samples in the mining region. The results show that striking cumulative effect of rare earth metals exist in the soil of mining areas influenced by rare earth development activities.LREE/HREE ratio in the mining area is higher than the one in the control area; The distribution of rare earth form is compact organic form 〉 exchangeable form 〉 Fe-Mn oxide form 〉 loosely combined organic form 〉 specific adsorption and carbonate form ~ water soluble form; It is A（eluvial horizon） 〉 B（illuvial horizon） 〉 C（parent material horizon） of the effective form of rare earth, light rare earth and heavy rare earth in soil horizon of mining area; the distribution of exchangeable form, loosely combined organic form, specific adsorption and carbonate form, and compact organic form is A 〉 B 〉 C while the distribution of water soluble form and Fe-Mn oxide form is B 〉 A 〉 C.

关 键 词：稀土矿区 土壤环境 稀土元素 有效态分布 

分 类 号：X53[环境科学与工程—环境工程]