期刊
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
卷 101, 期 6, 页码 504-508出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jenvrad.2010.03.002
关键词
Immobilized beads; Aspergillus fumigatus; Biosorption; Uranium (VI); Pseudo-second order
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. (C) 2010 Elsevier Ltd. All rights reserved.
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