Journal
MARINE POLLUTION BULLETIN
Volume 124, Issue 2, Pages 753-759Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.06.068
Keywords
17 alpha-ethyl estradiol (EE2); Bisphenol A (BPA); Hong Kong marine sediment; Adsorption; Competitive adsorption
Funding
- Research Grants Council, University Grants Committee (RGC, UGC) of the Hong Kong SAR Government [C7044-14G, 17208515]
- State Key Laboratory in Marine Pollution (SKLMP)
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The present experimental study was to characterize the adsorption behavior of 17 alpha-ethyl estradiol (EE2) onto marine sediment in both the single and binary solute systems. Stepwise spiking was innovatively performed to better understand the competition effects. Adsorption of EE2 on the marine sediment can be well fitted by the Freundlich model with an affinity coefficient (K-F) varying from 15.8 to 39.8 L/kg. It was significantly influenced by SOM and the particle properties. Co-presence of BPA brought about a significant competition effect on the adsorption of EE2, leading to a reduced EE2 adsorption. The competitive effect imposed.by EE2 to BPA, however, was even more serious owing probably to the large molecular structure and high hydrophobicity of EE2. The sediment sample with the highest SOM and SSA presented a mild competition effect, while the sediment with the lowest SOM and largest particle size exhibited the most serious competition effect.
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