Effects of reduction products of ortho-hydroxyl substituted azo dyes on biodecolorization of azo dyes.
Effects of reduction products of ortho-hydroxyl substituted azo dyes on biodecolorization of azo dyes.
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DOI：
10.1016/j.jhazmat.2009.05.136
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发表时间：
2009-11
影响因子：
13.6
通讯作者：
Guangfei Liu;Jing Wang;Hong Lu;Ruofei Jin;Ji-ti Zhou;Long Zhang
中科院分区：
文献类型：
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作者：
Guangfei Liu;Jing Wang;Hong Lu;Ruofei Jin;Ji-ti Zhou;Long Zhang
研究了几种邻羟基取代偶氮染料的还原产物对生物脱色的介导作用。结果表明，加入还原产物能有效地促进志贺氏菌QRZ-1对染料的脱色。以酸性红14 （AR14）还原产物的加入加速效果最好，许多偶氮染料的脱色效率提高了3倍以上。在序批式反应器实验中，系统启动时，AR14还原产物的加速效应更为明显（1.5倍）。当染料浓度增加到500mgL−1时，加速脱色效率仍保持在95%左右。饲料中AR14的存在提高了厌氧污泥的脱色性能，表明该策略可能有利于实际应用。AR14的还原产物1-萘酚-2-氨基-4-磺酸可能作为氧化还原介质加速偶氮染料的生物脱色。
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 500mgL−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.