Selective removal of U(VI) by immobilized sulfate-reducing bacteria

被引：0

作者：

Tang, Zhen-Ping ^{[1
]}

Zhou, Shuai ^{[1
]}

Wang, Wen-Tao ^{[1
]}

Xie, Shui-Bo ^{[1
,2
]}

Gao, Yuan-Yuan ^{[1
]}

Ma, Hua-Long ^{[1
]}

机构：

[1] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China

[2] Key Discipline Lab of National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China

来源：

Yuanzineng Kexue Jishu/Atomic Energy Science and Technology | 2014年 / 48卷 / 04期

关键词：

Immobilization; Selective removal; Sulfate-reducing bacteria; U(VI);

D O I：

10.7538/yzk.2014.48.04.0583

中图分类号：

学科分类号：

摘要：

The sulfate-reducing bacteria immobilized in polyvinyl alcohol-sodium alginate beads were prepared. The impacts of Zn2+, Cu2+, acetate, oxalate and citrate on the reduction of U(VI) were investigated. Furthermore, selective removal of U(VI) or heavy metals was assessed. The results indicate that the existing of Zn2+ or Cu2+ doesn't affect U(VI) removal appreciably when their concentrations are less than 100 mg/L, but they can inhibit U(VI) removal completely while their concentrations reach 150 mg/L. In the presence of monodentate ligand (acetate), U(VI) can be removed readily, whereas multidentate ligands (oxalate and citrate) impose an inhibition on U(VI) removal. In organic-free wastewater, direct selective removal of U(VI) can be achieved based on thermodynamic considerations and optimized by appropriately lowering COD/SO42-. In wastewater containing multidentate organics, U(VI) can be firstly complexed during precipitation of Zn2+ and Cu2+, and then removed directively after degradation of organic ligands.

引用

页码：583 / 590

页数：7

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