Sorption of 241Am by Aspergillus nigerspore and hyphae |
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| Authors: | Yuanyou Yang Ning Liu Shunzhong Luo Jiali Liao Jiannan Jin Taiming Zhang Pengji Zhao |
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| Affiliation: | (1) Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu, 610064, P.R. China;(2) Institute of Nuclear Physics and Chemistry, Chinese Academy of Engineering Physics (CAEP), P.O. Box 919-201, Mianyang Sichuan, 621900, P.R. China |
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| Abstract: | Biosorption of 241Am by a fungus A. niger, including the spore and hyphae, was investigated. The preliminary results showed that the adsorption of 241Am by the microorganism was efficient. More than 96% of the total 241Am could be removed from 241Am solutions of 5.6-111 MBq/l (C o) by spore and hyphaeof A. niger, with adsorbed 241Am metal (Q) of 7.2-142.4 MBq/g biomass, and 5.2-106.5 MBq/g, respectively. The biosorption equilibrium was achieved within 1 hour and the optimum pH range was pH 1-3. No obvious effects on 241Am adsorption by the fungus were observed at 10-45 °C, or in solutions containing Au3+ or Ag+, even 2000 times above the 241Am concentration. The 241Am biosorption by the fungus obeys the Freundlich adsorption equation. There was no significant difference between the adsorption behavior of A. nigerspore and hyphae. This revised version was published online in July 2006 with corrections to the Cover Date. |
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