Progress in the Study of Degradation Schemes for Azo Dyes
Azo dyes are one of the longest and most widely used dyes,because of their chemical stability,low production cost and wide range of colors used in all major production fields.With the development of science and technology,industri-al production has led to excessive discharge of wastewater containing azo dyes,causing serious environmental pollution and some azo dyes have shown strong biological toxicity,so the degradation of azo dyes is very necessary.In this paper,the deg-radation schemes of azo dyes in recent years are presented from three aspects:biological,physical and chemical,respec-tively.
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