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论文类型：期刊论文

发表时间：2009-11-15

发表刊物：JOURNAL OF HAZARDOUS MATERIALS

收录刊物：SCIE、PubMed

卷号：171

期号：1-3

页面范围：222-229

ISSN号：0304-3894

关键字：Acid Red 14; Azo dye; Decolorization; Redox mediator

摘要：The mediated effects of reduction products of some ortho-hydroxyl substituted azo dyes on biodecolorization were investigated. The results indicated that the addition of reduction products could effectively accelerate dye Decolorization by Shigella sp. QRZ-1. The best accelerating effect was obtained with the addition of reduction products of Acid Red 14(AR14), resulting in an over 3-fold increase in decolorization efficiency of many azo dyes. In sequencing batch reactor experiments, the accelerating effect of reduction products of AR14 was more obvious (1.5-fold) during the startup of the system. When the dye concentration was increased to 500 mg L(-1), the accelerated decolorization efficiency was still maintained around 95%. The presence of AR14 in the feed enhanced the decolorization performance of anaerobic sludge, indicating that the strategy may be beneficial for practical application. 1-Naphthol-2-amino-4-sulfonic acid, which is one of the reduction products of AR14, may function as redox mediator to speed up azo dye biodecolorization. (C) 2009 Elsevier B.V. All rights reserved.