Chemical and isotopic compositions of As contaminated groundwater at Sonargaon, Bangladesh.

Abstract

Recently, natural occurrence arsenic pollution in groundwater has been reported from various areas of the world. In this study, we target the largest polluted area, Bangladesh. Sonargaon area located on 25km south east of Dhaka is affected the significant arsenic pollution. We sampled groundwater from there in rainy and dry season, and analyzed the chemical and isotopic compositions. Based on those chemical characteristics, we investigate the formation mechanism of arsenic polluted groundwater, and also refer the seasonal variation.