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Title

Detection and evaluation of endocrine-disruption activity in water samples from Portuguese rivers

AuthorsQuirós, Laia ; Céspedes, Raquel; Lacorte Bruguera, Silvia; Viana, Paula; Raldúa, Demetrio; Barceló, Damià; Piña, Benjamín
KeywordsEndocrine disruption
Alkylphenols
Bisphenol A
Recombinant yeast assay
River monitoring
Issue DateFeb-2005
PublisherSETAC (Society)
CitationEnvironmental Toxicology and Chemistry 24(2): 389–395 (2005)
AbstractWater samples (n = 183) from Portuguese rivers were tested for the presence of endocrine disruptors using the recombinant yeast assay (RYA) combined with chemical identification of compounds having endocrine-disruption properties by liquid chromatography coupled to mass spectrometry. Ten selected locations were sampled monthly for a period of 20 months, from April 2001 to December 2002. More than 90% of samples showed either no detectable or low levels of estrogenicity (<0.1 ng/L of estradiol equivalents). The remaining samples (17 in total, 9.3%) showed estrogenicity values ranging from 0.1 to 1.7 ng/L of estradiol equivalents; only two samples showed values greater than 1 ng/L of estradiol equivalents. Most highly estrogenic samples (13 of 17 samples) originated in five sampling sites clustered in two zones near Porto and Lisbon. Chemical analysis detected alkylphenolic compounds (octyl- and nonylphenol plus nonylphenol ethoxylates) in all samples, albeit at concentrations less than 1 μg/L for each compound in 80% of samples. Total analyte concentration exceeded 10 μg/L in only 10 samples, with all but one of those originating from only two sampling sites. In these two locations, a good correlation was observed between the concentrations of octylphenol, nonylphenol, and to a lesser extent, bisphenol A in the samples and their estrogenicity values as calculated by RYA. We conclude that estrogenic activity can be explained by alkylphenol contamination in only these sites; for the remainder, we propose that pesticides and urban waste may be the main factors responsible for estrogenic contamination.
Description7 pages, 3 figures, 3 tables.-- PMID: 15719999 [PubMed]. Available online Jul 21, 2004.
Publisher version (URL)http://dx.doi.org/10.1897/04-121R.1
URIhttp://hdl.handle.net/10261/15458
DOI10.1897/04-121R.1
ISSN0730-7268
E-ISSN1552-8618
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