Modified Rhizopus arrhizus biomass for sorption of Am-241 and other radionuclides

作者：Tripathi S C^*; Kannan R; Dhami P S; Naik P W; Munshi S K; Dey P K; Salvi N A; Chattopadhyay S

来源：Journal of Radioanalytical and Nuclear Chemistry, 2011, 287(3): 691-695.

DOI：10.1007/s10967-010-0949-y

• Rhizopus arrhizus
• Dead biomass
• Immobilization
• Radionuclides
• Sorption

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 Am-241 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 Am-241 activity and has the sorption capacity of similar to 65 mg/g for americium and uranium. Hence, it can be utilized for the removal of radionuclides from radioactive waste effluents.

• 出版日期2011-3