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论文类型：期刊论文

发表时间：2015-01-01

发表刊物：JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY

收录刊物：SCIE、EI、Scopus

卷号：90

期号：1

页面范围：158-165

ISSN号：0268-2575

关键字：anaerobic biodecolorization; Fe(III)-reducing bacteria; Sphingomonas strain DJ; azo dye

摘要：BACKGROUNDAnaerobic technology is one of the most highly efficient methods for the biological treatment of dye wastewater by means of the reductive cleavage of the azo linkages. Dissimilatory Fe(III)-reducing microorganisms play crucial roles in a number of processes of environmental concern. The main objective of the study was to investigate the novel Fe(III)-reducing strain isolated from a BES enhanced by addition of Fe(OH)(3).
   RESULTSIn this study, a new electrogen, Sphingomonas strain DJ, was isolated from a microbial electrochemical reactor with Fe(OH)(3) added. The iron-reduction and the dye decolorization efficiencies of this strain achieved 69.04% and 97.65%, respectively. Cyclic voltammetry showed that strain DJ had electrochemical activity. The dye concentration, operating temperature and pH had obvious effects on the performance of the strain. Addition of Fe(III) into the medium further enhanced the decolorization efficiency. The possible pathway of the reduction of AO7 with the new strain was proposed.
   CONCLUSIONThe model developed for this study could provide a new method for enriching electroactively Fe(III)-reducing bacteria to treat other refractory wastewaters. (c) 2013 Society of Chemical Industry