Beudantite: a natural sink for As and Pb in sulphide oxidation processes
Authors: Nieto, J. M.; Capitán, M. A.; Sáez, R.; Almodóvar, G. R.
Source: Applied Earth Science, Volume 112, Number 3, 2003 , pp. 293-296(4)
Publisher: Maney Publishing
Abstract:Gossans are the products of intense oxidation of massive sulphide deposits exposed at the surface. In the Filón Sur deposit (Tharsis, Huelva), a detailed petrological and mineralogical study of the gossan has allowed us to establish the distribution and abundance of the main mineral phases in the gossan profile. Among these mineral phases, beudantite is present in the whole profile, although it tends to concentrate towards the lower part, where this mineral can reach up to 40%. Chemical analyses of beudantite have shown the presence of significant amounts of As and Pb in the structure. Since the content of As and Pb in the original sulphides is very low, beudantite acts as a sink for these two elements during the gossan formation process. This natural mechanism of As and Pb fixation can have important implications for remediation of areas affected by acid mine drainage.
Document Type: Research Article
Publication date: 2003-12-01
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