Biocalalyst effects of immobilized anthraquinone on the anaerobic reduction of azo dyes by the salt-tolerant bacteria

被引：118

作者：

Guo, Jianbo ^{[1
]}

Zhou, Jiti

Wang, Dong

Tian, Cunping

Wang, Ping

Uddin, M. Salah

Yu, Hui

机构：

[1] Dalian Univ Technol, Sch Environm & Biol Sci & Technol, Dalian 116023, Peoples R China

[2] Hebei Univ Sci & Technol, Sch Environm Sci & Engn, Shijiazhuang 050018, Peoples R China

来源：

WATER RESEARCH | 2007年 / 41卷 / 02期

关键词：

decolorization; azo dye; immobilized anthraquinone; calcium alginate; salt-tolerant bacteria;

D O I：

10.1016/j.watres.2006.10.022

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The accelerating effect of dissolved redox mediators has been studied in details in the biodecolorization processes, but there are little literatures about the non-dissolved redox mediators. Here we describe the accelerating effect of anthraquinone as a redox mediator in the bio-decolorization. Decolorization of azo dyes was carried out experimentally using the salt-tolerant bacteria under immobilized anthraquinone and high salt conditions. Anthraquinone as a redox mediator was able to increase the decolorization rate of azo dyes, and was immobilized by entrapment in calcium alginate (CA), Polyvinyl alcohol (PVA)-H3BO3 and agar, respectively. The effects of various operating conditions such as anthraquinone bead number, dissolved oxygen, temperature and pH on microbial decolorization were investigated experimentally. The reusability of the anthraquinone immobilization beads was evaluated with repeated-batch decolorization experiments. After four repeated experiments, the decolorization rate of CA immobilized anthraquinone retained over 90% of their original value. The experiments explored a great improvement of the redox mediator application and the new bio-treatment concept. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：426 / 432

页数：7

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