Academic journal article Michigan Academician

Chemistry

Academic journal article Michigan Academician

Chemistry

Article excerpt

Removal of Lead(II), Iron(III), and Arsenic(III) from Drinking Water Using Chitosan Synthesized from Isolated Chitin. Denise Robaczewski and Stanley-Pierre Ngeyi, Madonna University, Department of Physical and Applied Sciences; Ellen Oliver Smith, Madonna University, Department of Biological and Health Sciences

Chitosan is a naturally abundant low cost biopolymer, which can easily be obtained from the exoskeleton of insects, fungus, yeast and crustaceans. Chitosan is of particular interest because the chemical structures of amine and hydroxyl groups act as chelating sites for the adsorption of metal ions, specifically heavy metal ions from aqueous solutions and drinking water. In this research, crab, shrimp, and lobster shells were deproteinized and decalcified, followed by deacetylation. The product was then washed, dried and used for analysis. FT-IR spectroscopy was used for structural verification of the product as chitosan. After verification the product was used to study the adsorption characteristics of lead, iron, and arsenic in sample solutions. The general conclusion is that chitosan acts as an excellent adsorbent for heavy metals and can thus be used for water purification. …

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