Global Groundwater Arsenic Contamination: Impacts on Agriculture, Human Health and Social Life- A Short Review (original) (raw)

Abstract

Arsenic (As) poisoning via groundwater has become a worldwide problem, with 21 countries experiencing groundwater arsenic contamination. Most documented As contaminated groundwater in Asia are as follows: (a) Bangladesh: most districts including Chandpur, Munshiganj, Noakhali, Satkhira; (b) India: West Bengal, Bihar; (c) China: Inner Mongolia, Xinjiang and Shanxi Province; (d) Nepal: Terai region. Arsenic sulfides, arsenic-rich pyrite, and arsenic-rich iron oxyhydroxides are the most commonly found natural sources of arsenic contamination in groundwater worldwide and most researchers agree that arsenic contamination comes from the reductive dissolution of arsenic-rich iron oxyhydroxide. Over the past 14 years, research scientists collected and analysed 52,202 hand tubewell water samples from 64 districts in Bangladesh. These investigations found that, out of 64 districts, the arsenic level in 60 districts have exceeded WHO recommended guidelines of 10 µg/L and in 51 districts it exc...

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