Adsorption and biodegradation of azo dye in biofilm processes

被引：25

作者：

Li, J ^{[1
]}

Bishop, PL

机构：

[1] Univ Wisconsin, Dept Civil Engn & Mech, Milwaukee, WI 53201 USA

[2] Univ Cincinnati, Dept Civil & Environm Engn, Cincinnati, OH 45221 USA

来源：

WATER SCIENCE AND TECHNOLOGY | 2004年 / 49卷 / 11-12期

关键词：

acid orange 7; adsorption; azo dye; biodegradation; biofilm;

D O I：

10.2166/wst.2004.0851

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The removal of a common azo dye, acid orange 7 (AO7), in biofilm systems was investigated in this study. The abiotic and biotic fate of AO7 was examined under a variety of operating conditions: aerobic nitrification, anoxic denitrification and anaerobic digestion. A comparison of the performance between biofilm and activated sludge treatment processes was made. The adsorption of AO7 onto biofilm matrix and activated sludge flocs was found to fit the Langmuir equation. However, there is a significant difference in the adsorption capacities between biofilm and activated sludge. AO7 was recalcitrant in both biofilm and activated sludge systems under aerobic conditions. Under anaerobic conditions, AO7 was readily decolorized. AO7 decolorization was also observed under anoxic conditions. However, the presence of nitrate inhibited AO7 decolorization.

引用

页码：237 / 245

页数：9

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