PREDICTION OF WATER-SOLUBLE METAL CONCENTRATIONS IN FLUVIALLY DEPOSITED TAILINGS SEDIMENTS, UPPER CLARK FORK VALLEY, MONTANA, USA

被引：63

作者：

NIMICK, DA

MOORE, JN

机构：

[1] Department of Geology, University of Montana, Missoula

来源：

APPLIED GEOCHEMISTRY | 1991年 / 6卷 / 06期

关键词：

D O I：

10.1016/0883-2927(91)90074-Y

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Mine tailings deposited by historic floods contaminate large areas of the upper Clark Fork floodplain. Metal sulfates precipitate on the floodplain surface as byproducts of sulfide weathering and are concentrated by evaporation of soil moisture. These salts dissolve readily releasing high concentrations of Al, As, Cd, Cu, Fe, Mn, Zn and H+ to rainwater and cause periodic fish kills when contaminated runoff reaches the river. A pollution index is proposed to quantify the average enrichment of water-soluble metals over aquatic hazard levels which occur in floodplain surface sediments. A strong correlation between pH and the pollution index was observed. Because the pollution index can be predicted from pH, reconnaissance mapping of metal contamination in surface sediments on the Clark Fork floodplain and in other contaminated river systems can be conducted simply with a pH meter.

引用

页码：635 / 646

页数：12

共 47 条

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