Water chemistry and trace metal concentrations in an acidic alum shale pit lake-effects of liming

被引：0

作者：

Allard, Bert ^{[1
]}

Backstrom, Mattias ^{[1
]}

Haller, Sara ^{[2
]}

Karlsson, Stefan ^{[1
]}

Panova, Elena ^{[3
]}

Grawunder, Anja ^{[4
]}

机构：

[1] Univ Orebro, Man Technol Environm Res Ctr, SE-70182 Orebro, Sweden

[2] Sweco Infrastruct AB, SE-65109 Karlstad, Sweden

[3] St Petersburg State Univ, Dept Geochem, St Petersburg 199034, Russia

[4] Friedrich Schiller Univ, Inst Geosci, D-07749 Jena, Germany

来源：

MINE WATER - MANAGING THE CHALLENGES: PROCEEDINGS OF THE INTERNATIONAL MINE WATER ASSOCIATION CONGRESS 2011 | 2011年

关键词：

Alum shale; pit lake; liming; neutralisation;

D O I：

暂无

中图分类号：

TD [矿业工程];

学科分类号：

0819 ;

摘要：

A former open pit where alum shale was mined during 1942-65 has been water filled since 1966. The water chemistry was dominated by calcium and sulphate and had a pH of 3.5 until 1997-98, when pH was gradually increasing. This was due to the intrusion of alkaline leachates from a dry part of the pit into the lake. A stable pH of around 7.5 was obtained after 6-7 years. The chemistry of the pit lake has changed due to the neutralisation. Concentrations of some dissolved metals, notably zinc and nickel, have gone down while other metals, notably uranium and molybdenum, still are present at elevated levels. Weathering of shale is still in progress despite the high pH.

引用

页码：503 / 508

页数：6