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There is a global need to develop low-cost technologies to remove arsenic from water for individual household water supply. In this study, a purified and enriched waste material (treated magnetite waste, TMW) from the Trai Cau's iron ore mine in the Thai Nguyen Province in Vietnam was examined for its capacity to remove arsenic. The treatment system was packed with TMW that consisted of 75% of ferrous-ferric oxide (Fe 3 O 4 ) and had a large surface area of 89.7 m 2 /g. The experiments weredoi:10.2166/wst.2009.667 pmid:19901461 fatcat:apbfvbh5knhmdjde6rgl64ufxe