Contamination Of Agricultural Soil By Arsenic
Containing Irrigation Water In Bangladesh:
Overview Of Status And A Proposal For Novel
Biological Remediation
Author(s)
S. M. A. Islam, K. Fukushi & K. Yamamoto
Abstract
Arsenic toxicity in the groundwater of Bangladesh poses a serious threat to
public health. More than 35 million people are consuming arsenic-polluted
groundwater there. So far, a lot of effort has been made to find safe drinking
water but no suitable solution has yet been established, while continued cropping
with arsenic contaminated irrigation water increases the extent of contamination
in agricultural land. The objective of this paper is to review information on the
arsenic concentration in the agricultural soil of Bangladesh irrigated with
arsenic-contaminated water. In addition, this study overviews the literature,
which focus on the biological remediation of arsenic from soil. Arsenic as high
as 10 kg/ha per year is cycled through irrigated water and deposited on surface
soil of Bangladesh, which results in its cumulative accumulation. It was observed
to be as high as 83 mgAs/kg arsenic in the topsoil of irrigated agricultural land
whereas in non-irrigated land arsenic was reported as 3-9 mgAs/kg. Considering
the increasing trend of arsenic concentration in soil, it is necessary to establish
some procedure for arsenic cleanup from soil. Biological cleanup could be a
feasible solution for a developing country like Bangladesh. The feasibility of
biological removal of arsenic from soil has been established in one study.
Keywords: arsenic concentration, agricultural land soil, rice plant, biological
removal of arsenic, biological gasification of arsenic, soil column.
Keywords
arsenic concentration, agricultural land soil, rice plant, biological
removal of arsenic, biological gasification of arsenic, soil column.
Related Book
Other papers in this volume
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