title: Analysis of estrogenic activity in environmental waters in Rio de Janeiro state (Brazil) using the yeast estrogen screen.
abstract: The estrogenicity of waters collected from an important hydrological system in Brazil (Paraiba do Sul and Guandu Rivers) was assessed using the yeast estrogen screen (YES) assay. Sampling was performed in rivers and at the outlets of conventional water treatment plants (WTP). The removal of estrogenic activity by ozonation and chlorination after conventional water treatment (clarification and sand filtration) was investigated employing samples of the Guandu River spiked with estrogens and bisphenol A (BPA). The results revealed a preoccupying incidence of estrogenic activity at levels higher than 1ngL(-1) along some points of the rivers. Another matter of concern was the number of samples from WTPs presenting estrogenicity surpassing 1ngL(-1). The oxidation techniques (ozonation and chlorination) were effective for the removal of estrogenic activity and the combination of both techniques led to good results using less amounts of oxidants.
authors.affiliation: Chemical Engineering Program - COPPE, Federal University of Rio de Janeiro, P.O. Box 68502, 21941-972 Rio de Janeiro, RJ, Brazil. Electronic address: amanda@peq.coppe.ufrj.br.
authors.forename: Amanda Cristina Vieira
authors.initials: AC
authors.lastname: Dias
authors.affiliation: Chemical Engineering Program - COPPE, Federal University of Rio de Janeiro, P.O. Box 68502, 21941-972 Rio de Janeiro, RJ, Brazil. Electronic address: fredwegenast@hotmail.com.
authors.forename: Frederico Wegenast
authors.initials: FW
authors.lastname: Gomes
authors.affiliation: Department of Environmental and Sanitary Engineering, State University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil. Electronic address: danielebilai@gmail.com.
authors.forename: Daniele Maia
authors.initials: DM
authors.lastname: Bila
authors.affiliation: Chemical Engineering Program - COPPE, Federal University of Rio de Janeiro, P.O. Box 68502, 21941-972 Rio de Janeiro, RJ, Brazil. Electronic address: lippel@peq.coppe.ufrj.br.
authors.forename: Geraldo Lippel
authors.initials: GL
authors.lastname: Sant'Anna
authors.affiliation: Chemical Engineering Program - COPPE, Federal University of Rio de Janeiro, P.O. Box 68502, 21941-972 Rio de Janeiro, RJ, Brazil. Electronic address: mdezotti@peq.coppe.ufrj.br.
authors.forename: Marcia
authors.initials: M
authors.lastname: Dezotti
mesh_terms: D001559:Benzhydryl Compounds / Q000032:analysis; D001681:Biological Assay / Q000379:methods; D001938:Brazil; D004967:Estrogens / Q000032:analysis*; D004968:Estrogens, Non-Steroidal / Q000032:analysis; D004970:Estrone; D005618:Fresh Water / Q000737:chemistry; D010636:Phenols / Q000032:analysis; D045483:Rivers; D012441:Saccharomyces cerevisiae / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D004967:Estrogens; D004968:Estrogens, Non-Steroidal; D004970:Estrone; D010636:Phenols; D014874:Water Pollutants, Chemical; C006780:bisphenol A; D000098826:Bisphenol A Compounds
keywords: Endocrine disrupting chemicals; Estrogens; River water quality; YES assay