Ozonation of an azo dye CI Remazol Black 5 and toxicological assessment of its oxidation products

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Ozonation of an azo dye CI Remazol Black 5 and toxicological assessment of its oxidation products
	Wang, CX; Yediler, A; Lienert, D; Wang, ZJ; Kettrup, A
刊名	CHEMOSPHERE
	2003
卷号	52 期号:7 页码:1225-1232
关键词	reactive dyes ozonation acute toxicity biodegradability BOD5/28 oxidation by-products bioluminescence test the neutral red cytotoxicity assay
英文摘要	The effect of ozonation (20.5 mg 1(-1)) on the degradation processes of an azo dye, Remazol Black 5 (RB5; Cl) was studied. Conventional parameters such as chemical oxygen demand (COD), total organic carbon (TOC), pH, conductivity, colour removal, biodegradability (BOD5/28), and toxic potential of the dye and its degradation products were monitored during the process. The results obtained indicated that ozonation is a highly effective way to remove the colour of a corresponding dye solution. However, a considerable organic load still remained as indicated by high COD and TOC residues. The COD, TOC reductions were about 40% and 25% for 6 h ozonation of 2 g 1(-1) RB5 aqueous solution. During the ozonation process the rapid decrease of pH and the sharp increase of conductivity indicated the formation of acidic by-products and small fragments and ions which were identified by high performance ion chromatography. The BOD28 data revealed that first by-products after partial ozonation (10-150 min) of RB5 were more biodegradable than the parent compound and ozonation can enhance the biodegradability of azo dyes. During the first 150 min of total 360 min of oxidation, the formation of first by-products with high toxic potential took place as it could be confirmed by two acute toxicity-screening tests, the bioluminescence test (Vibrio fischerii) and the neutral red cytotoxicity assay (rat hepatoma cells). The significant enhancement of microbial biodegradability after long-term ozonation could also be seen as a decrease of toxic intermediates in correlation with the ozonation time as indicated in BOD28 biological degradation test results. (C) 2003 Elsevier Science Ltd. All rights reserved.
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:000183945500014
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/23768]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Wang, CX,Yediler, A,Lienert, D,et al. Ozonation of an azo dye CI Remazol Black 5 and toxicological assessment of its oxidation products[J]. CHEMOSPHERE,2003,52(7):1225-1232.
APA	Wang, CX,Yediler, A,Lienert, D,Wang, ZJ,&Kettrup, A.(2003).Ozonation of an azo dye CI Remazol Black 5 and toxicological assessment of its oxidation products.CHEMOSPHERE,52(7),1225-1232.
MLA	Wang, CX,et al."Ozonation of an azo dye CI Remazol Black 5 and toxicological assessment of its oxidation products".CHEMOSPHERE 52.7(2003):1225-1232.