2017-6-8Arsenic is ubiquitous in the earths crust in low concentrations. Elevated levels can be found in mineral deposits and ores. Arsenic from such deposits leaches into the groundwater in the form of arsenite AsO 3 3 and arsenate AsO 4 3 , causing its contamination. In addition to the arsenic originating from natural sources, industry and agriculture contribute to the contamination to.
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