Abstract
The improvement and the refinement of non-viable Rhizopus arrhizus biomass were investigated via immobilization. Immobilization was carried out by using sodium alginate/CaCl2 solution and formaldehyde/HCl cross-linking with dead Rhizopus arrhizus biomass and were used for the sorption of radionuclides from low level effluent wastes. The sodium alginate/CaCl2 immobilized biomass (ratio 1:2) showed about 86% sorption for 241Am activity but due to its soft nature and tendency to undergo distortion in shape, is unsuitable for practical applications. The biomass cross-linked with 15% formaldehyde/0.1 M HCl solution has a relatively high mechanical strength and rigidity. It was showing a sorption of >99% for 241Am activity and has the sorption capacity of ~65 mg/g for americium and uranium. Hence, it can be utilized for the removal of radionuclides from radioactive waste effluents.
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Tripathi, S.C., Kannan, R., Dhami, P.S. et al. Modified Rhizopus arrhizus biomass for sorption of 241Am and other radionuclides. J Radioanal Nucl Chem 287, 691–695 (2011). https://doi.org/10.1007/s10967-010-0949-y
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DOI: https://doi.org/10.1007/s10967-010-0949-y