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The tolerance of Rhizopus arrihizus to U(VI) and biosorption behavior of U(VI) onto R. arrihizus

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成果类型:
期刊论文
作者:
Wang, Jing-song;Hu, Xin-jiang;Wang, Jie;Bao, Zheng-lei;Xie, Shui-bo;Yang, Jin-hui
通讯作者:
Wang, J.-S.
作者机构:
[Wang, Jing-song; Yang, Jin-hui; Hu, Xin-jiang; Wang, Jie; Bao, Zheng-lei] School of Urban Construction, University of South China, Hengyang, Hunan 421001, China
[Xie, Shui-bo; Wang, Jing-song] Hunan Key Laboratory of Pollution Control and Resource Reuse, University of South China, Hengyang, Hunan 421001, China
[Hu, Xin-jiang] College of Environmental Science and Engineering, Hunan University, Changsha 410082, China
通讯机构:
[Wang, Jing-song] Univ S China, Hunan Key Lab Pollut Control & Resource Reuse, Changsheng Rd 28, Hengyang 421001, Hunan, Peoples R China.
Hunan Key Laboratory of Pollution Control and Resource Reuse, University of South China, Changsheng Road 28, Hengyang, China
语种:
英文
关键词:
Batch systems;Biosorption;Functional groups;Rhizopus arrihizus;Tolerance;Uranium
期刊:
Biochemical Engineering Journal
ISSN:
1369-703X
年:
2010
卷:
51
期:
1-2
页码:
19-23
基金类别:
National Natural Science Foundation of China [20707008, 10775065]; Scientific Research Fund of Hunan Provincial Education Department [06B082]; Construct Program of the Key Discipline in Hunan province
机构署名:
本校为第一且通讯机构
院系归属:
土木工程学院
摘要:
This work focused on U(VI) biosorption using suspended Rhizopus arrihizus. To understand the biosorption process, the tolerance of the strain to U(VI) and the effects of solution pH, initial U(VI) concentration, temperature, and contact time on U(VI) removal were investigated in batch systems. The results demonstrated that R. arrihizus can grow normally in 200mgL<sup>-1</sup> uranium-contained medium. Optimum biosorption was observed at solution pH 4.0 and the maximum biosorption capacity (112.2mgg<sup>-1</sup>) was obtained at initial U(VI) concentration of 200mgL<sup>-1</sup>. The biosorption process appeared to be temperature independent. Biosorption equilibrium was established within 90min and the pseudo second-order model was found to fit accurately with the experimental data. FT-IR analysis and SEM morphology indicated that the structure of the strain remained integral after biosorption. Amino group plays an important role in the biosorption process, hydroxyl and carboxyl groups are also involved in U binding. &copy;2010 Elsevier B.V.

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