期刊
ENVIRONMENTAL POLLUTION
卷 157, 期 2, 页码 698-703出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2008.08.007
关键词
Nonylphenol; Octylphenol; Sorption; Sediments; Field concentrations
资金
- European Union under the Global Change and Ecosystems [FP6]
- Water Cycle and Soil Related Aspects [505428 GOCE]
- Spanish Ministry of Education and Science [CTM2005-25168-E]
- Departament d'Universitats
- Recerca i Societat de la Informacio de la Generalitat de Catalunya [200417100856, 2006 BE-2 00082]
- Ministry of Science, Research
- Arts of Baden Wuertemberg [AZ33-7533.18-15-02/80]
This study reports sorption isotherms of the endocrine disruptors nonylphenol (NP) and octylphenol (OP) in three sediment samples from the Ebro River basin (NE Spain), with organic carbon fractions (foc) ranging from 0.0035 to 0.082 goc g(-1). All isotherms were fitted to the Freundlich model with slightly nonlinear exponents ranging from 0.80 to 0.94. The solubility of the compounds as well as the organic carbon (OC) content had the strongest influences on the sorption behavior of these compounds. Comparison of the laboratory-spiked samples with the native contamination of NP of 45 water and concurrent sediment samples resulted in reasonable matches between both data sets, even though the lowest concentrations in the field were not completely reached in laboratory tests. This good agreement indicates that sorption laboratory data can be extrapolated to environmental levels and therefore the distribution of nonylphenol between sediments and water can be predicted with a precision of one order of magnitude. Furthermore, laboratory experiments with simultaneous loading of NP and OP revealed negligible competition for sorption sites at low concentrations. (C) 2008 Elsevier Ltd. All rights reserved.
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