Targeting arsenic-safe aquifers for drinking water supplies |
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Authors: | Jochen Bundschuh Marta I Litter Prosun Bhattacharya |
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Institution: | 1.Institute for Applied Research,Karlsruhe University of Applied Sciences,Karlsruhe,Germany;2.Department of Land and Water Resources Engineering,Royal Institute of Technology,Stockholm,Sweden;3.Gerencia Química, Comisión Nacional de Energía Atómica, and Escuela de Posgrado,Universidad de Gral. San Martín,San Martín,Argentina;4.KTH-International Groundwater Arsenic Research Group, Department of Land and Water Resources Engineering,Royal Institute of Technology (KTH),Stockholm,Sweden |
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Abstract: | At present, 70 countries worldwide are affected by groundwater contamination by arsenic (As) released from predominantly geogenic
sources. Consequently, the As problem is becoming a global issue. The option to target As-safe aquifers, which uses geological,
geochemical, hydrogeological, morphological and climatic similarities to delimit As-safe aquifers, appears as a sustainable
mitigation option. Two pilot areas, Meghna Flood Plain in Matlab Upazila, representative of Bengal Delta in Bangladesh, and
Río Dulce Alluvial Cone, representing a typical aquifer setting in the Chaco-Pampean Plain in Argentina groundwater As occurrence,
were compared. In rural Bangladesh, As removal techniques have been provided to the population, but with low social acceptance.
In contrast, “targeting As-safe aquifers” was socially accepted in Bangladesh, where sediment color could be used to identify
As-safe aquifer zones and to install safe wells. The investigation in Argentina is more complex because of very different
conditions and sources of As. Targeting As-safe aquifers could be a sustainable option for many rural areas and isolated peri-urban
areas. |
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