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... : En13-5/98-32E-PDF

"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.

Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.872704&sl=1

• Format MARC XML
• Format MARC HTML

Demander des formats alternatifs