Iron Oxide Nanoparticles to Remove Arsenic from Water
Arsenic contamination in water is a widespread problem globally. Millions of people depend on arsenic-contaminated groundwater. Arsenic poisoning leads to fatal diseases such as skin and internal cancers. Hence, the current regulation of drinking water standard has become more stringent and requires arsenic content to be reduced to a few parts per billion. Therefore, effective and inexpensive technologies for arsenic removal are needed. Majority of communities affected by arsenic contamination could not justify the cost and maintenance of installing centralized arsenic treatment systems. Thus, there is a need to develop point-of-use water treatment devices. Here we review arsenic contamination, it’s health effects, and available removal technologies. We then describe the development of a working prototype cartridge to remove arsenic from drinking water that meets international standard norms. For that we synthesized iron oxide nanoparticles using a chitosan biopolymer. Iron oxide originated from steel waste. Granules were thereafter packed in a column and evaluated for arsenic removal efficiency using simulated ground water compositions.
KeywordsArsenic Arsenic removal technologies Arsenic adsorption Arsenic remediation Water purification Iron oxide Drinking water Point-of-use water treatment Ground water contamination Arsenic toxicology
Authors would like to acknowledge Mr. Manish Kumar Bhadu and Dr. Monojit Dutta of Tata steel Ltd. Jamshedpur for providing iron oxide powder, participation in useful technical discussions and support. Authors would also like to acknowledge their colleagues of Tata Chemicals water purifier business Mr. Sabaleel Nandy, Mr. Ujas Dave and Dr. Kumaresan Nallasamy for their support. The authors would gratefully like to acknowledge support for this research from Tata Chemicals Ltd. through its President –Innovation Centre, Dr. Arup Basu, and Head –Innovation Centre, Dr. Anil Kumar.
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