About: Geological controls on groundwater chemistry and arsenic mobilization: Hydrogeochemical study along an E-W transect in the Meghna basin, Bangladesh     Goto   Sponge   Distinct   Permalink

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  • Hydrogeochemical investigations along an E-W transect in the middle Meghna basin show groundwater chemistry and redox condition vary considerably with the change in geology. Groundwater in the Holocene shallow (<150 m bgl) alluvial aquifer in western part of the transect is affected by high arsenic concentration (As >10 μg/l) and salinity. On the other hand, groundwater from the Pliocene Dupi Tila sandy aquifer in the eastern part is fresh and low in As (<10 μg/l). The Holocene shallow aquifers are high in dissolved As, HCO-3, Fe and dissolved organic carbon (DOC), but generally low in SO2-4 and NO-3. High HCO3 concentrations (250-716 mg/l) together with high DOC concentrations (1.4-21.7 mg/l) in these aquifers reflect active sources of degradable natural organic matter that drives the biogeochemical process. There is generally de-coupling of As from other redox-sensitive elements. In contrast, the Pliocene aquifers are low in As, HCO3 and DOC. Molar ratio of
  • Hydrogeochemical investigations along an E-W transect in the middle Meghna basin show groundwater chemistry and redox condition vary considerably with the change in geology. Groundwater in the Holocene shallow (<150 m bgl) alluvial aquifer in western part of the transect is affected by high arsenic concentration (As >10 μg/l) and salinity. On the other hand, groundwater from the Pliocene Dupi Tila sandy aquifer in the eastern part is fresh and low in As (<10 μg/l). The Holocene shallow aquifers are high in dissolved As, HCO-3, Fe and dissolved organic carbon (DOC), but generally low in SO2-4 and NO-3. High HCO3 concentrations (250-716 mg/l) together with high DOC concentrations (1.4-21.7 mg/l) in these aquifers reflect active sources of degradable natural organic matter that drives the biogeochemical process. There is generally de-coupling of As from other redox-sensitive elements. In contrast, the Pliocene aquifers are low in As, HCO3 and DOC. Molar ratio of (en)
Title
  • Geological controls on groundwater chemistry and arsenic mobilization: Hydrogeochemical study along an E-W transect in the Meghna basin, Bangladesh
  • Geological controls on groundwater chemistry and arsenic mobilization: Hydrogeochemical study along an E-W transect in the Meghna basin, Bangladesh (en)
skos:prefLabel
  • Geological controls on groundwater chemistry and arsenic mobilization: Hydrogeochemical study along an E-W transect in the Meghna basin, Bangladesh
  • Geological controls on groundwater chemistry and arsenic mobilization: Hydrogeochemical study along an E-W transect in the Meghna basin, Bangladesh (en)
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  • RIV/61989592:15310/09:00010664!RIV10-MSM-15310___
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  • 316306
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  • RIV/61989592:15310/09:00010664
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  • groundwater chemistry; redox conditions; transect; Bangladesh (en)
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  • NL - Nizozemsko
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  • [D21EFE3DCC7F]
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  • Journal of Hydrology
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  • 378
http://linked.open...iv/tvurceVysledku
  • Bhattacharya, Prosun
  • Jacks, Gunnar
  • Šráček, Ondřej
  • Hasan, Aziz
  • Brömssen Von, Mattias
  • Matin Ahmed, Kazi
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  • 0022-1694
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  • 15310
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