Speciation and solubility relationships of Al, Cu and Fe in solutions associated with sulfuric acid leached mine waste rock

被引：25

作者：

Shum, M ^{[1
]}

Lavkulich, L ^{[1
]}

机构：

[1] Univ British Columbia, Dept Soil Sci, Vancouver, BC V6T 1Z4, Canada

来源：

ENVIRONMENTAL GEOLOGY | 1999年 / 38卷 / 01期

关键词：

mine water chemistry; secondary mineral dissolution; saturation indices; waste rock solution;

D O I：

10.1007/s002540050401

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Solutions from oxidized waste rock originating from an acid-leached waste dump were studied. The dissolution data suggest that after the majority of the soluble solid phases are removed, remaining solid phases continued to buffer the solutions in the acidic pH range. Incorporating the solution data into MINTEQA2 identified controls on the solubility of Al, Cu and Fe at pH values from about 2.5 to slightly over 5. Sulfate appears to play a significant role in the formation of solubility controlling solid phases for Al and Cu. This is not the case for Fe, and is suggested that Fe and Cu solubility may be controlled by cupric ferrite at low pH values.

引用

页码：59 / 68

页数：10

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