TY - GEN
T1 - Geochemical evidence of arsenic transport in Shallow Ground Water, Bangladesh
AU - Tauhid-Ur, Rahman Md
AU - Akira, Mano
AU - Udo, Keiko
AU - Ishibashi, Yoshinobu
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - High Arsenic (As) in the shallow groundwater (GW) of the Southern Western Bangladesh has been recognized as the natural catastrophe since 1990s. This paper aims to unveil the likely geochemical phenomena that may dominate in both release and transport of As in that shallow alluvial aquifer. Observed linear relationships between As and Iron (Fe) contents both in sediment (R2 = 0.42) and in GW (R = 0.46) reflect their probable co-existence and co-precipitation characteristics. Speciation analysis with geochemical code PHREEQC shows that some Fe minerals have already been reached at the super saturation state, indicating further the subsequent co-precipitation of the accompanying As. Linear Equilibrium partition coefficient Kd (As) was noticed to vary inversely with dissolved Fe in a relatively high pH, reflecting the leaching potentiality of As from sediment to groundwater, due to the loss of promising sorption sites. HCO3 was reportedly found as the efficient leaching (24.5 μg/l) agent in releasing adsorbed As from the aquifer sediment.
AB - High Arsenic (As) in the shallow groundwater (GW) of the Southern Western Bangladesh has been recognized as the natural catastrophe since 1990s. This paper aims to unveil the likely geochemical phenomena that may dominate in both release and transport of As in that shallow alluvial aquifer. Observed linear relationships between As and Iron (Fe) contents both in sediment (R2 = 0.42) and in GW (R = 0.46) reflect their probable co-existence and co-precipitation characteristics. Speciation analysis with geochemical code PHREEQC shows that some Fe minerals have already been reached at the super saturation state, indicating further the subsequent co-precipitation of the accompanying As. Linear Equilibrium partition coefficient Kd (As) was noticed to vary inversely with dissolved Fe in a relatively high pH, reflecting the leaching potentiality of As from sediment to groundwater, due to the loss of promising sorption sites. HCO3 was reportedly found as the efficient leaching (24.5 μg/l) agent in releasing adsorbed As from the aquifer sediment.
KW - Arsenic
KW - Desorption
KW - Groundwater
KW - Leaching
KW - Sorption
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U2 - 10.1007/978-3-540-89465-0_135
DO - 10.1007/978-3-540-89465-0_135
M3 - Conference contribution
AN - SCOPUS:84903440988
SN - 9783540894643
T3 - Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS
SP - 769
EP - 774
BT - Advances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS
PB - Springer Berlin Heidelberg
T2 - 16th Congress of Asia and Pacific Division of International Association of Hydraulic Engineering and Research, APD 2008 and the 3rd IAHR International Symposium on Hydraulic Structures, ISHS 2008
Y2 - 20 October 2008 through 23 October 2008
ER -