Geochemical evidence of arsenic transport in Shallow Ground Water, Bangladesh

Rahman Md Tauhid-Ur, Mano Akira, Keiko Udo, Yoshinobu Ishibashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationAdvances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS
PublisherSpringer Berlin Heidelberg
Pages769-774
Number of pages6
ISBN (Print)9783540894643
DOIs
Publication statusPublished - 2009
Event16th 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 - Nanjing, China
Duration: 2008 Oct 202008 Oct 23

Publication series

NameAdvances in Water Resources and Hydraulic Engineering - Proceedings of 16th IAHR-APD Congress and 3rd Symposium of IAHR-ISHS

Other

Other16th 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
CountryChina
CityNanjing
Period08/10/2008/10/23

Keywords

  • Arsenic
  • Desorption
  • Groundwater
  • Leaching
  • Sorption

ASJC Scopus subject areas

  • Civil and Structural Engineering

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