Sorption of 241Am by Aspergillus niger spore and hyphae
Author:
Yuanyou Yang,1* Ning Liu,1 Shunzhong Luo,2 Jiali Liao,1 Jiannan Jin,1 Taiming Zhang,2 Pengji Zhao2
Date: 1 May 2006
Abstract:
Biosorption of 241Am by a fungus A. niger, including the spore and hyphae, was investigated. The preliminary results showed that the adsorption of241Am by the microorganism was efficient. More than 96% of the total 241Am could be removed from 241Am solutions of 5.6-111 MBq/l (Co) byspore and hyphae of A. niger, with adsorbed 241Am metal (Q) of 7.2-142.4 MBq/g biomass, and 5.2-106.5 MBq/g, respectively. The biosorptionequilibrium was achieved within 1 hour and the optimum pH range was pH 1-3. No obvious effects on 241Am adsorption by the fungus wereobserved at 10-45 °C, or in solutions containing Au3+ or Ag+, even 2000 times above the 241Am concentration. The 241Am biosorption by thefungus obeys the Freundlich adsorption equation. There was no significant difference between the adsorption behavior of A. niger spore andhyphae.
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