Risk assessment of arsenic mitigation options in Bangladesh

被引:0
|
作者
Howard, Guy
Ahmed, M. Feroze
Shamsuddin, Abu Jafar
Mahmud, Shamsul Gafur
Deere, Daniel
机构
[1] DPHE Bhaban, Arsen Policy Support Unit, Dhaka 1000, Bangladesh
[2] Bangladesh Univ Engn & Technol, Int Training Network, Dhaka 1000, Bangladesh
[3] Water Futures, Dundas Valley, NSW 2117, Australia
关键词
arsenic; arsenic mitigation; water pollution; water supply; water quality; risk assessment; DALYs; pathogens; technology choice; Bangladesh;
D O I
暂无
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The provision of alternative water sources is the principal arsenic mitigation strategy in Bangladesh, but can lead to risk substitution. A study of arsenic mitigation options was undertaken to assess water quality and sanitary condition and to estimate the burden of disease associated with each technology in disability-adjusted life years (DALYs). Dugwells and pond-sand filters showed heavy microbial contamination in both dry and monsoon seasons, and the estimated burden of disease was high. Rainwater was of good quality in the monsoon but deteriorated in the dry season. Deep tubewells showed microbial contamination in the monsoon but not in the dry season and was the only technology to approach the World Health Organization's reference level of risk of 10(-6) DALYs. A few dugwells and one pond-sand filter showed arsenic in excess of 50 mu g/L. The findings suggest that deep tubewells and rainwater harvesting provide safer water than dugwells and pond-sand filters and should be the preferred options.
引用
收藏
页码:346 / 355
页数:10
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