Competitive sorption between 17α-ethinyl estradiol and bisphenol A/4-n-nonylphenol by soils

作     者：Jianzhong Li Lu Jiang Xi Xiang Shuang Xu Rou Wen Xiang Liu 

作者机构：School of EnvironmentTsinghua University 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2013年第25卷第6期

页      面：1154-1163页

核心收录：

学科分类：082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 09[农学] 0903[农学-农业资源与环境] 

基　　金：supported by the Special Environmental Research Funds for Public Welfare (No. 201209053) the National High Technology Research and Development Program (863) of China (No. 2008AA062502) 

主　　题：competitive sorption 17α-ethinyl estradiol endocrine-disrupting chemicals distributed reactivity model black carbon 

摘      要：The sorption of 17α-ethinyl estradiol （EE2）, bisphenol A （BPA）, and 4-n-nonylphenol （NP） in single systems and the sorption of EE2 with different initial aqueous concentrations of BPA or NP were examined using three soils. Results showed that all sorption isotherms were nonlinear and fit the Freundlich model. The degree of nonlinearity was in the order BPA （0.537-0.686） 〉 EE2 （0.705-0.858） 〉 NP （0.875-0.0.951） in single systems. The isotherm linearity index of EE2 sorption calculated by the Freundlich model for Loam, Silt Loam and Silt increased from 0.758, 0.705 and 0.858, to 0.889, 0.910 and 0.969, respectively, when BPA concentration increased from 0 to 1000 μg/L, but the effect of NP was comparably minimal. Additionally, EE2 significantly suppressed the sorption of BPA, but insignificantly suppressed that of NE These findings can be attributed to the difference of sorption affinity of EE2, NP and BPA on the hard carbon （e.g., black carbon） of soil organic matter that dominated the sorption in the low equilibrium aqueous concentration range of endocrine-disrupting chemicals （EDCs）. Competitive sorption among EDCs presents new challenges for predicting the transport and fate of EDCs under the influence of co-solutes.