J. Phys. IV France 107 (2003) 177
Use of "red earth"-low cost remedial option for arsenic removalR. Bhattacharyya1, 2, D. Chatterjee1 and G. Jacks2
1 Department of Chemistry, University of Kalyani, Nadia 741235, West Bengal, India
2 Department of Land & Water Resources Engineering, Royal Institute of Technology, 10044 Stockholm, Sweden
High arsenic groundwater has emerged as a niggling environmental problem in the recent decades. Elevated levels of groundwater arsenic ( >>50ppb) in the Bengal Delta Plain (BDP) threatens the lives of millions of people. The present study deals with the adsorption pattern of AsO 43- and AsO 33-, the predominant arsenic species in groundwater using red earth for the supply of potable water. The mineralogical study of red earth exhibits the predominance of iron and aluminium secondary phases. Cost calculated for the transportation of red earth approximates to US$ 16/ton/1000km whereas the treatment process estimates to US$ 0.6/100L contaminated water. Batch and column studies reveal the promising role of red earth in removing arsenic from water.
© EDP Sciences 2003