J Environ Sci (China)
September 2003
Azo dyes are among the oldest man-made chemicals and they are still widely used in the textile, printing and the food industries. About 10% - 15% of the total dyes used in the industry is released into the environment during the manufacturing and usage. Some dyes and some of their N-substituted aromatic bio-transformation products are toxic and/or carcinogenic and therefore these dyes are considered to be envionmental pollutants and health hazards.
View Article and Find Full Text PDFIn this study, advanced oxidation process utilizing Fenton's reaction was investigated for the decolorization and degradation of two commercial dyes viz., Red M5B, Blue MR and H-acid, a dye intermediate used in chemical industries for the synthesis of direct, reactive and azo dyes. Effect of Fe2 +, H2O2, pH, and contact time on the degradation of the dyes was studied.
View Article and Find Full Text PDFIndian J Environ Health
October 2001
Stone crushers are small scale industries in the unorganised sector. They provide basic material for road and building construction. They are highly labour intensive.
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