NDLI: Mercury speciation and dispersion from an active gold mine at the West Wits area, South Africa

Content Provider	Springer Nature Link
Author	Lusilao Makiese, J. G. Tessier, E. Amouroux, D. Tutu, H. Chimuka, L. Weiersbye, I. Cukrowska, E. M.
Copyright Year	2015
Abstract	Total mercury (HgTOT), inorganic mercury (IHg), and methylmercury (MHg) were determined in dry season waters, sediments, and tailings from an active mine which has long history of gold exploitation. Although HgTOT in waters was generally low (0.03 to 19.60 ng L−1), the majority of the samples had proportions of MHg of at least 90 % of HgTOT which denotes a substantial methylation potential of the mine watersheds. Mercury was relatively high in tailing materials (up to 867 μg kg−1) and also in the mine sediments (up to 837 μg kg−1) especially in samples collected near tailing storage facilities and within a receiving water dam. Sediment profiles revealed mercury enrichment and enhanced methylation rate at deeper layers. The presence of IHg and decaying plants (organic matter) in the watersheds as well as the anoxic conditions of bulk sediments are believed to be some of the key factors favoring the mercury methylation at the site.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISSN	01676369
Journal	Environmental Monitoring and Assessment
Volume Number	188
Issue Number	1
e-ISSN	15732959
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-12-21
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mercury Speciation Methylation Gold mine Tailings Environmental Monitoring/Analysis Environmental Management Ecotoxicology Atmospheric Protection/Air Quality Control/Air Pollution Ecology
Content Type	Text
Resource Type	Article
Subject	Pollution Medicine Management, Monitoring, Policy and Law

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