Kenson Associates

Report on Practical Methods for Removal of Arsenic from Subsurface Aquifiers and Drinking Water Systems

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Courtesy of Kenson Associates

In some areas of the world, arsenic presence in subsurface aquifiers and drinking water systems is a potentially serious human health hazard. In certain areas of Bangladesh and also in parts of the West Bengal district of India, for example, a majority of shallow subsurface aquifiers and tube wells are contaminated with arsenic at levels which are orders of magnitude above the recommended arsenic level of 50 micrograms/liter. Serious adverse health effects, including human mortality, from arsenic contamination of drinking water are well documented by numerous scientific studies (ref.1). Removal of arsenic from drinking water is therefore a worldwide priority.

This summary report is concerned with practical and proven methods for the removal of arsenic from groundwater aquifiers and drinking water systems. A separate section of this report summarizes point-of-use arsenic removal methods for individual households and small groups of households. It should be noted that methods for arsenic removal in point-of-use systems are not always able to be scaled up for large municipal water system applications. Other references (refs. 2, 3, 4, 5) cover point-of-use systems well and should be consulted for any such arsenic removal systems not covered by this report.

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