Hydrological control of As concentrations in Bangladesh groundwater

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dc.contributor.author Stute, M.
dc.contributor.author Zheng, Y.
dc.contributor.author Schlosser, P.
dc.contributor.author Horneman, A.
dc.contributor.author Dhar, R. K.
dc.contributor.author Datta, Saugata
dc.contributor.author Hoque, M. A.
dc.contributor.author Seddique, A. A.
dc.contributor.author Shamsudduha, M.
dc.contributor.author Ahmed, K. M.
dc.contributor.author Van Geen, A.
dc.date.accessioned 2012-06-01T13:55:31Z
dc.date.available 2012-06-01T13:55:31Z
dc.date.issued 2012-06-01
dc.identifier.uri http://hdl.handle.net/2097/13888
dc.description.abstract The elevated arsenic (As) content of groundwater from wells across Bangladesh and several other South Asian countries is estimated to slowly poison at least 100 million people. The heterogeneous distribution of dissolved arsenic in the subsurface complicates understanding of its release from the sediment matrix into the groundwater, as well as the design of mitigation strategies. Using the tritium-helium (3H/3He) groundwater dating technique, we show that there is a linear correlation between groundwater age at depths <20 m and dissolved As concentration, with an average slope of 19 μg L−1 yr−1 (monitoring wells only). We propose that either the kinetics of As mobilization or the removal of As by groundwater flushing is the mechanism underlying this relationship. In either case, the spatial variability of As concentrations in the top 20 m of the shallow aquifers can to a large extent be attributed to groundwater age controlled by the hydrogeological heterogeneity in the local groundwater flow system. en_US
dc.relation.uri http://www.agu.org/pubs/crossref/2007/2005WR004499.shtml en_US
dc.rights Copyright 2007 by the American Geophysical Union. en_US
dc.subject Arsenic en_US
dc.subject Bangladesh en_US
dc.subject Groundwater en_US
dc.subject Hydrological control en_US
dc.subject Tritium en_US
dc.subject Helium en_US
dc.title Hydrological control of As concentrations in Bangladesh groundwater en_US
dc.type Article (publisher version) en_US
dc.date.published 2007 en_US
dc.citation.doi doi:10.1029/2005WR004499 en_US
dc.citation.jtitle Water Resources Research en_US
dc.citation.spage W09417 en_US
dc.citation.volume 43 en_US
dc.contributor.authoreid sdatta en_US

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