Approaches for removal of arsenic from ground water of northeastern India

摘要

High concentration of arsenic (As) in groundwater in the northeastern states of India has become a major cause of concern in recent years. As in groundwater has been detected in some parts of Assam, Tripura, Manipur, Nagaland and Arunachal Pradesh. Recognizing the problem of As poisoning, simple and cheap methods to produce As-free water in rural areas is an urgent need. This article deals with As-free water production and may be recommended according to National Standard for use in rural areas of the north-eastern region. The article also explains the removal of As from water using wood charcoal and sand, by chemical treatment, by sedimentation method, by coagulation process or by removing the layer floating on As-bearing water. Using this method more than 90% removal of As can be achieved. Therefore, it is a possible option for use in rural areas.