No silver bullet for arsenic in groundwater

96dd3fe831c7aa6e805ca26998c9b40dNo single method will work in all locations where arsenic needs to be removed from groundwater, says a United Nations University (UNU) review of 31 technologies developed over the past 20 years.

Released on 31 January, the review compares the effectiveness and costs of technologies tested in laboratories or through field trials to remove arsenic in groundwater — a health threat to at least 140 million people in 50 countries, according to the World Health Organisation. Long-term exposure to arsenic in drinking water and food can cause cancer and skin lesions.

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