2008
DOI: 10.1007/s10661-008-0192-y
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Distribution of endocrine disruptors in the Mondego River estuary, Portugal

Abstract: Recent studies in the Mondego River estuary demonstrated signs of pollution in the area, but the nature of the contamination remains unexplored. Because there seems to be any studies in that zone checking for the simultaneous presence of xenoestrogenic endocrine disrupting compounds, either of animal (estradiol and estrone), vegetal (daidzein, genistein and biochanin A), pharmaceutical (17α-ethynylestradiol) or industrial (bisphenol A, 4-octylphenol, 4-nonylphenol) origins, the main objective of this study was… Show more

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Cited by 62 publications
(20 citation statements)
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“…The presence of nutrients, chlorophyll a and DO are important parameters for evaluation of the eutrophization status. The levels of nutrients such as nitrates, nitrites, ammonium and orthophosphates were very high compared to other studies performed in this estuary in 2005 and 2009 (Rocha et al , 2009a. Besides, levels of nitrates were above the maximum values recommended in the Portuguese legislation (Decreto-Lei no 236/98, up to 50 mg L -1 ) in all seasons (Ambiente 1998).…”
Section: Physicochemical Parameterscontrasting
confidence: 52%
“…The presence of nutrients, chlorophyll a and DO are important parameters for evaluation of the eutrophization status. The levels of nutrients such as nitrates, nitrites, ammonium and orthophosphates were very high compared to other studies performed in this estuary in 2005 and 2009 (Rocha et al , 2009a. Besides, levels of nitrates were above the maximum values recommended in the Portuguese legislation (Decreto-Lei no 236/98, up to 50 mg L -1 ) in all seasons (Ambiente 1998).…”
Section: Physicochemical Parameterscontrasting
confidence: 52%
“…The relative rise in OP and NP concentrations determined in the summer in comparison with the cooler autumn and winter periods was indicated by Xu et al (2006) in river water in China. Similarly, in the Mondego river estuary in Portugal Ribeiro et al (2009) found higher concentrations at stations of higher water temperature and higher dissolved oxygen concentration. Higher water temperature in the summer period is conducive to microbiological activity, which triggers more rapid decomposition of precursors (alkylphenol etoxylates), in turn giving rise to free alkylphenols (Ying et al, 2002;Xu Manzano et al (1999) found that alkylphenol etoxylate decomposition was 30% faster at a temperature of 25°C than at 7°C.…”
Section: River Mouthsmentioning
confidence: 77%
“…Microbiological decomposition of alkylphenol etoxylates (0.5 P r 6 1.0) and BPA (À0.5 P r 6 À0.7) occurs in well-oxygenated waters (Table 4). Many authors have indicated fast bisphenol A and alkylphenol decomposition in aerobic conditions (Ying et al, 2002;Kang et al, 2006a;Ying, 2006;Ribeiro et al, 2009).…”
Section: River Mouthsmentioning
confidence: 99%
“…At the same time, point-source pollution from wastewater, waste management, industry and contaminated land has also potentially increased. As a result, pesticides, pharmaceuticals (Leston et al, 2011;Santos et al, 2010), endocrine disruptors (Baptista et al, 2013;Nunes et al, 2011;Ribeiro et al, 2009), metals (Couto et al, 2013), organic material, salt, ammonia and other urban contaminants might have increased in the system, though treatment plants can be successful in removing some of them (EPA, 2010). Such alterations in the type and pattern of LULC driving forces could have implications not only on future management policies, but also on monitoring plans and on the selection of biological indicators.…”
Section: Lulc As Driving Forces and Dynamics Over The Yearsmentioning
confidence: 99%