Biosorption of uranium (VI) by immobilized Aspergillus fumigatus beads.
Biosorption of uranium (VI) ions by immobilized Aspergillus fumigatus beads was investigated in a batch system. The influences of solution pH, biosorbent dose, U (VI) concentration, and contact time on U (VI) biosorption were studied. The results indicated that the adsorption capacity was strongly affected by the solution pH, the biosorbent dose and initial U (VI) concentration. Optimum biosorption was observed at pH 5.0, biosrobent dose (w/v) 2.5%, initial U (VI) concentration 60 mg L(-1). Biosorption equilibrium was established in 120 min. The adsorption process conformed to the Freunlich and Temkin isothermal adsorption models. The dynamic adsorption model conformed to pseudo-second order model.
Wang
Jing-song
JS
School of Urban Construction, University of South China, 28 West Changsheng Road, Hengyang, Hunan 421001, PR China. xhwjs@163.com
Hu
Xin-jiang
XJ
Liu
Yun-guo
YG
Xie
Shui-bo
SB
Bao
Zheng-lei
ZL
D001232:Aspergillus fumigatus / Q000166:cytology / Q000378:metabolism*; D018914:Cells, Immobilized / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D014501:Uranium / Q000378:metabolism*
D014501:Uranium