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Removing arsenic from groundwater for the developing world--a review
1Department of Civil Engineering, University of Surrey, Guildford, UK.
Summary
This study reviews arsenic removal from water using oxidation, coagulation, and adsorption. These methods effectively reduce arsenic levels, but require validation for cost and maintenance in developing regions.
Area of Science:
- Environmental Chemistry
- Water Treatment Technologies
- Public Health
Background:
- Arsenic (As) is a highly carcinogenic and toxic substance found in surface and groundwater.
- Contaminated water poses significant public health risks globally.
- Effective arsenic removal strategies are crucial for safe drinking water.
Purpose of the Study:
- To summarize the effectiveness of oxidation, coagulation/precipitation, and adsorption processes for arsenic removal from water.
- To evaluate the efficiency of these technologies in reducing arsenic concentrations.
- To highlight the need for further assessment of these methods in diverse socio-economic contexts.
Main Methods:
- Review of existing literature on arsenic treatment technologies.
- Analysis of data on arsenic removal efficiencies.
- Comparison of different treatment processes: oxidation, coagulation/precipitation, and adsorption.
Main Results:
- Oxidation, coagulation/precipitation, and adsorption are efficient in removing arsenic from water.
- Influent arsenic concentrations ranging from 10-500 pg/l can be reduced to 5-10 pg/l in the effluent.
- These technologies demonstrate significant potential for arsenic remediation.
Conclusions:
- The reviewed technologies are effective for arsenic removal from contaminated water sources.
- Further research is needed to validate the efficiency, cost-effectiveness, and maintenance requirements of these methods.
- Consideration of local resources and socio-economic factors is essential for implementing arsenic removal solutions in developing countries.