Experimental Study of Coagulation Treatment of the Arsenic-Containing Rural Drinking Groundwater

Abstract

The arsenic-containing rural drinking groundwater was treated by coagulation method in the paper. It was studied that the varieties and dosages of coagulants, pH value and sedimentation time have an effect on removal of arsenic. The experimental results indicated that the rate of arsenic removal is able to reach 95.6% at room temperature and under the condition of neutral pH values, 20 mg of Fe2(SO4)3 as coagulant and 1 h of sedimentation time. The content of arsenic in the treated drinking groundwater can be up to the current national hygiene standards of rural drinking water (<0.05mg /L).