NDLI: The Weathering Behavior of Heavy Metals in Ore Processing Residues (Mansfeld Region, Germany)

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The Weathering Behavior of Heavy Metals in Ore Processing Residues (Mansfeld Region, Germany)

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The Weathering Behavior of Heavy Metals in Ore Processing Residues (Mansfeld Region, Germany)

Content Provider	Springer Nature Link
Author	Schubert, M. Morgenstern, P. Wennrich, R. Freyer, K. Weiss, H.
Copyright Year	2003
Abstract	One of the ore processing residues in the Mansfeld region of Germany is a flue dust, which was scrubbed out of the smelter process gases by spraying water into the hot gas stream. During the many years of ore processing, the resulting fine-grained sludge was washed into ponds for storage. These sludge deposits were covered by water and thus sealed off from the atmosphere. However, after the local copper works shut down in 1990, the ponds dried up, causing the sludge in the uppermost layers to oxidize. The need to assess the risk posed by these deposits today prompted questions over the depth to which the dried sludge can be altered by weathering and the extent of heavy metal emissions. A drill hole was bored at the center of a dry pond and the core samples analyzed. The samples indicated relatively constant levels of Cu and Pb with depth, but other metals, such as Cd, Mn, and Zn, were relatively depleted in the upper 50 cm of the sludge body. Such behavior can be explained by the solubilities of the respective secondary phases. It appears that the oxidation of metal sulfides and the subsequent dissolution of the respective secondary phases, especially sulfates, pose a potential problem for the quality of the nearby ground and surface water.
Starting Page	2
Ending Page	6
Page Count	5
File Format	PDF
ISSN	10259112
Journal	Mine Water and the Environment
Volume Number	22
Issue Number	1
e-ISSN	16161068
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-04-01
Publisher Institution	International Mine Water Association (IMWA)
Publisher Place	Berlin Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Geotechnical Engineering and Engineering Geology

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