柞水银铅矿地表径流沉积物中污染物相态分析

THE ANALYSIS OF POLLUANT FORMS IN HTE RIVER SEDIMENTS OF SILVER LEAD MINE IN ZHASHUI

采自柞水银铅矿地表径流６个沉积物样品，用连续提取法提取了金属元素的５种化学相态（可交换相、碳酸盐相，铁锰氧化物结合相，有机质－硫化物结合相及残渣相），测定了各相中铜铅锌含量，分析了其分布特征。结果表明，在河流沉积物中，铜主要以残渣相和有机质相存在，铅、锌主要为铁锰水合氧化物相和碳酸盐相。在此基础上，对矿山开采中环境影响进行了讨论。

Samples of sediments at 6 locations in the river of silver lead mine were taken and five forms (exchangable, carbonate,organic,Fe/Mn oxide and residentual fractions)of heavy metals (Cu,Pb,Zn)were extracted by tessier method. The contents of the five forms for these metals (Cu,Pb,Zn)were determined by G6x-6A),and the patterns of there distribution have been discussed.In the river sediments,copper metal exist mainly in residual fraction and organic form,lead and zinc exist mainly in Fe/Mn oxide and carbonate forms.Therefore, the environmental impact on the mineral prospect has been discussed.