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http://nopr.niscpr.res.in/handle/123456789/21852| Title: | Comparative studies for chitosan yield and chelating ability of Aspergillus niger and Rhizopus oryzae |
| Authors: | Bhuvaneshwari, S Sivasubramanian, V |
| Keywords: | Aspergillus niger;Chitosan;Chromium;Copper;Rhizopus oryzae |
| Issue Date: | Jul-2013 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Chitosan is a natural polysaccharide comprising copolymer of glucosamine and N-acetyl glucosamine, and can be obtained by the deacetylation of chitin. Due to its biodegradability, biocompatibility and low toxicity, chitosan has received increased attention as one of the promising renewable polymeric materials for its various applications in the bioremediation, pharmaceutical, chemical and biomedical industries. In the present study, chitosan was extracted from cell walls of Aspergillus niger and Rhizopus oryzae, and characterized for mol wt, viscosity and degree of deacetylation. Further, effect of metal concentration, pH and contact time on the adsorption of heavy metals from aqueous solutions by extracted-chitosan was studied. The sorption properties were also compared using live biomass and the chitosan from A. niger and R. oryzae. It has been found that A. niger gave good yield and the extracted chitosan also had high sorption capacity compared to the chitosan derived from R. oryzae. The maximum adsorption capacity for copper (79.65%) and chromium (87.61%) was obtained using A. niger at optimized conditions. Fourier transform infrared (FT-IR) analysis indicated that hydroxyl and amine groups of chitosan structure were involved in the mechanism of copper and chromium adsorption. |
| Page(s): | 429-431 |
| ISSN: | 0975-0967 (Online); 0972-5849 (Print) |
| Appears in Collections: | IJBT Vol.12(3) [July 2013] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJBT 12(3) 429-431.pdf | 118.08 kB | Adobe PDF | View/Open |
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