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dc.contributor.authorRajpert, Liwia
dc.contributor.authorKolvenbach, Boris
dc.contributor.authorAmmann, Erik
dc.contributor.authorHockmann, Kerstin
dc.contributor.authorNachtegaal, Maarten
dc.contributor.authorEiche, Elisabeth
dc.contributor.authorSchäffer, Andreas
dc.contributor.authorCorvini, Philippe
dc.contributor.authorSklodowska, Aleksandra
dc.contributor.authorLenz, Markus
dc.date.accessioned2016-11-22T11:20:00Z
dc.date.available2016-11-22T11:20:00Z
dc.date.issued2016
dc.identifier.doi10.1021/acs.est.6b02037
dc.identifier.urihttp://hdl.handle.net/11654/23574
dc.description.abstractConcentrations of soil arsenic (As) in the vicinity of the former Złoty Stok gold mine (Lower Silesia, southwest Poland) exceed 1000 μg g–1 in the area, posing an inherent threat to neighboring bodies of water. This study investigated continuous As mobilization under reducing conditions for more than 3 months. In particular, the capacity of autochthonic microflora that live on natural organic matter as the sole carbon/electron source for mobilizing As was assessed. A biphasic mobilization of As was observed. In the first two months, As mobilization was mainly conferred by Mn dissolution despite the prevalence of Fe (0.1 wt % vs 5.4 for Mn and Fe, respectively) as indicated by multiple regression analysis. Thereafter, the sudden increase in aqueous As[III] (up to 2400 μg L–1) was attributed to an almost quintupling of the autochthonic dissimilatory As-reducing community (quantitative polymerase chain reaction). The aqueous speciation influenced by microbial activity led to a reduction of solid phase As species (X-ray absorption fine structure spectroscopy) and a change in the elemental composition of As hotspots (micro X-ray fluorescence mapping). The depletion of most natural dissolved organic matter and the fact that an extensive mobilization of As[III] occurred after two months raises concerns about the long-term stability of historically As-contaminated sites.
dc.description.urihttp://pubs.acs.org/doi/abs/10.1021/acs.est.6b02037
dc.language.isoen
dc.relation.ispartofEnvironmental Science and Technology
dc.accessRightsAnonymous
dc.titleArsenic Mobilization from Historically Contaminated Mining Soils in a Continuously Operated Bioreactor: Implications for Risk Assessment
dc.type01 - Zeitschriftenartikel, Journalartikel oder Magazin
dc.volume50
dc.issue17
dc.audienceScience
fhnw.publicationStatePublished
fhnw.ReviewTypeAnonymous ex ante peer review of a complete publication
fhnw.InventedHereYes
fhnw.PublishedSwitzerlandNo
fhnw.pagination9124–9132
fhnw.IsStudentsWorkno
fhnw.publicationOnlineJa


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