Heavy Metal contamination in groundwater

Researchers at the Indian Institute of Science (IISc) have developed a new three-step process to remove heavy metal contaminants, such as arsenic, from groundwater.

• IISc researchers collaborate with NGOs, including the INREM Foundation and Earthwatch, to test and deploy these systems in rural areas like Bhagalpur in Bihar and Chickballapur in Karnataka.

About IISc new method

• The IISc new method is designed to remove heavy contaminants from groundwater. 
• It not only removes arsenic but also guarantees safe and sustainable disposal of the contaminants.

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• • Further, It prevents them from re-entering the groundwater system. 
• This comprehensive approach addresses a major gap in existing arsenic removal technologies.
  • Three processes are:
    • Adsorption: Separating arsenic from water using a biodegradable absorbent.
    • Bioremediation: Reducing pollutant concentration.
    • Environmentally Friendly Disposal: Ensuring safe disposal of removed heavy metals.

Contamination Status in India

• Arsenic levels: Reports indicate 113 districts in 21 Indian states have arsenic levels above 0.01 mg per liter.
• Fluoride levels: Additionally, 223 districts in 23 states have fluoride levels exceeding 1.5 mg per liter.
  • These levels are above the permissible limits set by the Bureau of Indian Standards and the World Health Organization (WHO), posing health risks.

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