00000nam 2200000zi 4500 9.870751 CaOODSP 20241203113647 m o d f cr nn||||||||| 190328s1991 oncbd ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn-qu En13-5/91-67E-PDF Maguire, R. J. (R. James) author. Occurrence of dyes in the Yamaska River, Quebec / R.J. Maguire and R.J. Tkacz. Burlington, Ontario : Rivers Research Branch, National Water Research Institute, Environment Canada, [1991]. 1 online resource (15, [5] pages) : maps, charts, figures. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 91-67 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (pages 8-10). "A study of the Yamaska River in Québec in the-period 1985 - 1987 has revealed the occurrence suspended of fifteen dyes in water, solids and sediment downstream from textile mills. The dyes were found in 1985 and 1986, but not in 1987. The most contaminated area was downstream from Granby, which has the largest concentration of textile mills in the basin. Three dyes were positively identified - Disperse Red 60, Disperse Blue 26 and Disperse Blue 79, the most widely used dye in the world. In addition, a mutagenic degradation product of Disperse Blue 79, 2-bromo-4, 6-dinitroaniline, was identified in sediment at a location about 6 km downstream from Granby. This product is a result of the reductive cleavage of the azo bond of Disperse Blue 79 in anaerobic sediments. Most of the dyes found are expected to be moderately stable in aerobic environments, but may degrade under anaerobic conditions. This is the first demonstration of the occurrence of dyes in the Canadian environment"--Abstract. Includes management perspective and abstract in English and French. gccst Rivers gccst Pollutants Dyes and dyeing Tkacz, Richard J., author. Canada. Environment Canada. National Water Research Institute (Canada). Rivers Research Branch. NWRI contribution ; 91-67. (CaOODSP)9.844121 PDF 2.21 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-91-67-eng.pdf