11 research outputs found
Seasonal variation of alkylphenols and bisphenol A in waters and clams from a Spanish-Portuguese river estuary
Occurrence, distribution and bioaccumulation of endocrine disrupting compounds in water, sediment and biota samples from a European river basin
The occurrence, distribution and bioaccumulation of five endocrine disrupting compounds (4-tert-octylphenol,
4-n-octylphenol, 4-n-nonylphenol, nonylphenol and bisphenol A) in water, sediment and biota (Corbicula
fluminea) collected along the Minho River estuary (NW Iberian Peninsula) were examined. Samples were
collected in two campaigns(May andNovember, 2012) and analyzed by different extraction procedures followed
by liquid chromatography tandem mass spectrometry determination. The presence of linear isomers (4-noctylphenol
and 4-n-nonylphenol) was scarcely observed whereas branched isomers (4-tert-octylphenol and
nonylphenol) were measured in almost all samples.Wastewater treatment plant effluents and nautical, fishing
and agricultural activities are considered the primary source of pollution of the river by alkylphenols. The
presence of bisphenol A in the river could be mainly associated to punctual sources of contamination from
industrial discharges. A decrease in the total concentration of phenolic compounds in water was observed
from spring to autumn (from 0.888 μg L−1 in May to 0.05 μg L−1 in November), while similar values were
shown in C. fluminea samples from the two campaigns (1388 and 1228 ng g−1 dw in spring and autumn,
respectively). In sediments, the total concentration of the target compounds varied between 13 and 4536 ng g−1 dw (average of 1041 ng g−1 dw). Sediment–water partition coefficient (Kd), bioaccumulation factor
(BAF) and biota–sediment accumulation factor (BSAF) were estimated and highest values were obtained for
nonylphenol. Calculated risk quotients showed low and moderate risk for the aquatic environment from the
presence of the target compounds at all sampling points. The estimation of the daily intake of the studied
compounds via water and biota ingestion indicated no risk for human health.Versión del editor3,258
Levels of Alkylphenols and Bisphenol A in mussel samples from the North-Northwest coast of Spain.
Occurrence of endocrine disrupting compounds in five estuaries of the northwest coast of Spain: Ecological and human health impact
The occurrence and spatial distribution of alkylphenols (4-tert-octylphenol, 4-n-octylphenol, 4-n-nonylphenol, nonylphenol) and bisphenol A were examined in five estuaries along the Northwest coastal area of Spain. As far as we know, no previous works about this topic could be found in the literature. A total of 98 seawater samples were collected during May 2011–July 2012 and analyzed by a highly sensitive DLLME–LC–MS/MS methodology recently developed. Results indicated nonylphenol was the most ubiquitous compound with maximal concentration of 0.337 μg L−1 (Ría de Vigo). The environmental quality standards (EQS) established in Directive 2013/39/EU for 4-tert-octylphenol were slightly exceeded in some sampling points. Fishing harbours, water treatment plant and industrial discharges were supposed as the main sources of contamination. Low and medium ecological risk was determined in all estuaries. Possible endocrine effects on biota and population were estimated in terms of estrogenic activity and daily intake respectively, and no risk was found in any case.En prensa3,206
Behavior of fluorine and chlorine in Spanish coal fired power plants with pulverized coal boilers and fluidized bed boiler
Occurrence of alkylphenols and bisphenol A in wild mussel samples from the Spanish Atlantic coast and Bay of Biscay
Wild mussels (Mytilus galloprovincialis) were selected as bioindicators of chemical pollution to evaluate the occurrence and spatial distribution of five endocrine disrupting compounds in the Spanish Atlantic coast and Bay of Biscay. A total of 24 samples were collected in May, 2011 and analysed by selective pressurized liquid extraction followed by liquid chromatography tandem mass spectrometry determination. Branched alkylphenols (4-tert-octylphenol and nonylphenol) were determined in more than 90% of the analysed samples whereas the presence of linear alkylphenols (4-n-octylphenol and 4-n-nonylphenol) was scarcely detected (< 12% of the samples). Wastewater treatment plants discharges and nautical, fishing and shipping activities were considered the primary sources of contamination by alkylphenols. Bisphenol A was found in 16% of the analysed samples associated to punctual industrial discharges. A total endocrine disrupting compound (alkylphenols and bisphenol A) average concentration of 604 ng g− 1 dw was calculated and nonylphenol was the main contributor in almost all sampling points.Versión del edito