Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
Mar Pollut Bull. 2011 Nov;62(11):2362-9. doi: 10.1016/j.marpolbul.2011.08.036. Epub 2011 Sep 25.
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 (Kd) and the sediment organic carbon contents. The medium salinity showed a positive relation with the Kd 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.
通过一系列动力学和热力学吸附实验，详细研究了壬基酚（NP，一种有毒内分泌干扰物）在海洋沉积物上的吸附行为。结果表明，NP 在海洋沉积物上的吸附反应在 1.5 小时内达到平衡，且符合非线性 Ho-McKay 拟二级模型。H2O 处理沉积物上 NP 的吸附等温线可以很好地用线性等温线模型来描述，而 H2O2 处理沉积物上 NP 的吸附等温线可以很好地用 Freundlich 等温线模型来拟合。分配系数（Kd）与沉积物有机碳含量之间呈正相关关系。中盐度与 Kd 呈正相关，与溶解有机碳（DOC）呈负相关。十六烷基三甲基溴化铵（CTAB）对 NP 的吸附量增加最多，而十二烷基苯磺酸钠（SDBS）对 NP 的吸附量增加最少。NP 在海洋沉积物上的吸附反应是自发的、物理的、放热的和熵减少的过程。
