Journal
MARINE POLLUTION BULLETIN
Volume 62, Issue 11, Pages 2362-2369Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2011.08.036
Keywords
Nonylphenol; Sorption; Marine sediments; Linear isotherm model; Freundlich isotherm model
Funding
- National Science Fund for Distinguished Young Scholars of China [40525017]
- Changjiang Scholars Programme
- Ministry of Education of China
- Taishan Scholars Programme of Shandong Province, China
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The sorption behavior of nonylphenol (NP, a toxic endocrine disruptor) on marine sediments was studied in detail through a series of kinetic and thermodynamic sorption experiments. The results showed that the sorption reaction of NP on marine sediments reached equilibrium in 1.5 h and that it accorded well with the non-linear Ho-McKay pseudo-second-order model. The sorption isotherms of NP on H2O-treated sediments could be well described by the Linear isotherm model, while the sorption isotherm on H2O2-treated sediments could be well fitted with the Freundlich isotherm model. A positive correlation was found between the distribution coefficient (K-d) and the sediment organic carbon contents. The medium salinity showed a positive relation with the K-d and a negative relation with the dissolved organic carbon (DOC). Hexadecyl trimethyl ammonium bromide (CTAB) enhanced the sorption amount of NP the most, while sodium dodecylbenzenesulfonate (SDBS) enhanced it the least. The sorption reaction of NP on marine sediments was a spontaneous, physical, exothermic and entropy-decreasing process. (C) 2011 Elsevier Ltd. All rights reserved.
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