00000nam 2200000zi 4500 9.872704 CaOODSP 20241203113648 m o d f cr bn||||||||| 190509s1998 onca ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- En13-5/98-32E-PDF Lee, H. B., author. Occurrence and elimination of nonylphenol ethoxylates and metabolites in municipal wastewater and effluents / by Hing-Biu Lee and Thomas E. Peart, Aquatic Ecosystem Protection Branch, National Water Research Institute, Environment Canada. Burlington, Ontario : National Water Research Institute = Institut national de recherche sur les eaux, [1998] 1 online resource (4 unnumbered pages, 20 pages) : illustration. text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; no. 98-032 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "A survey of the concentrations of nonylphenol ethoxylates (NPEO) and their metabolites in wastewater samples collected from a Canadian sewage treatment plant using primary and secondary treatment is presented. 24h-Hr composite raw sewage, primary effluent and final effluent samples were collected monthly over a one-year period. Levels of NPnEO (n=1 to 17) and their metabolites, nonylphenol (NP) and nonylphenoxy carboxylic acids (NPEC), in these samples were determined by HPLC and GC/MS methods. While ca. 85% of the total alkylphenolics in raw sewage are ethoxylates, the major component (nearly 80%) in the final effluent was in the form of carboxylic acids. During this study period, the median total alkylphenolic concentrations in raw sewage and final effluent were 526 and 248 nmol/L, respective1y, representing an overall elimination rate of 53%. The estimated daily discharge of the nonylphenolics to the aquatic environment varied from 15 to 44 moles, with a median value of 20 moles. These data suggested that conventional sewage treatments are ineffective in the removal of the surfactant-derived metabolites"--Abstract. Includes management perspective and abstract in French. gccst Pollutants gccst Waste water Peart, Thomas E., author. Canada. Environment Canada. National Water Research Institute (Canada). Aquatic Ecosystem Protection Branch. National Water Research Institute (Canada) NWRI contribution ; no. 98-032. (CaOODSP)9.844121 PDF 894 KB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-98-32-eng.pdf