Seasonal Variations of Arsenic in the Ganges and Brahmaputra River, Bangladesh Journal Article uri icon



  • Dissolved arsenic concentrations in the Ganges, Brahmaputra Rivers and confluence of these two rivers show important seasonal variations and maximum arsenic concentrations are observed during the monsoon season (July–October). These seasonal variations of dissolved arsenic concentrations were closely related to intense river-water discharge during the monsoon season with high arsenic-rich suspended particulate matter (SPM) loads. These arsenic-rich SPM mainly are primarily originated from erosion of agricultural land in upstream region irrigated with arsenic contaminated shallow groundwater and to some extent weathering of bed rocks. Considerable amount of iron and manganese enriched SPM adsorbs arsenic and increased water temperature in the summer accelerates microbially-mediated reduction of arsenic (V) to more soluble arsenic (III). Additionally, dissolution of solid arsenic-bearing mineral phases also attributes to high arsenic concentrations in water and causes seasonal variations. It is realized that the SPM of these two major rivers primarily controls the arsenic inputs into the Ganges-Brahmaputra-Meghna delta system. The cycling of arsenic in this delta is related to the monsoon seasonal dynamics, land use patterns and biogeochemical processes.Keywords: Arsenic; Ganges; Brahmaputra; Seasonal variation; Bangladesh.© 2012 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: Sci. Res. 4 (1), 65-75 (2012)

publication date

  • December 23, 2011

has restriction

  • gold

Date in CU Experts

  • December 10, 2021 4:38 AM

Full Author List

  • Islam SMN; Rahman SH; Chowdhury DA; Rahman MM; Tareq SM

author count

  • 5

Other Profiles

International Standard Serial Number (ISSN)

  • 2070-0237

Electronic International Standard Serial Number (EISSN)

  • 2070-0245

Additional Document Info

start page

  • 65

end page

  • 65


  • 4


  • 1