Arsenic residual generated by water treatment, it's handling and disposal
Arsenic in groundwater beyond allowable concentration of 0.05 mg/lit in some parts of India, has posed serious threat to well being of large section of people. As one of the major mitigation, the contaminant is being removed from extracted groundwater and then the water is pressed for essential use of the people. There are several methods being employed for removal of arsenic in it's pentavalent as well as trivalent forms. The sludge generated from co-precipitated flocs or backwater water from absorbed/adsorbed/Ion exchangers etc.