用于从水环境中选择性去除内分泌干扰化合物的双分子印迹聚合物涂层磁性颗粒。
Duo-molecularly imprinted polymer-coated magnetic particles for class-selective removal of endocrine-disrupting compounds from aqueous environment.
机构信息
Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6.
出版信息
Environ Sci Pollut Res Int. 2013 May;20(5):3331-9. doi: 10.1007/s11356-012-1262-9. Epub 2012 Oct 25.
The removal of steroid and phenolic endocrine-disrupting compounds (EDCs) from an aqueous environment was investigated using magnetic particles encapsulated by a duo-molecularly imprinted polymer (duo-MIP). The effect of environmental variables on the binding efficiency was studied. Experimental results showed that the amount of EDCs adsorbed was neither affected by up to 10.0 mM NaCl nor significantly interfered by up to 10.0 mg/L humic acid. Negligible influence was observed from pH 3.3 to pH 6.8, but a decrease started at pH 9. Freundlich isotherm parameters indicated binding capacities in the order of DES > E2 ∼ E1 > BPA. The applicability of class-selective removal was verified using river water samples spiked with these EDCs at 10 μg/L; the binding efficiencies were 90, 90, 88, and 98 % for estrone (E1), 17β-estradiol (E2), bisphenol A (BPA), and diethylstilbestrol (DES), respectively. A reuse investigation verified constant binding capacities exhibiting <2 % reduction after seven cycles of regeneration.
采用双模板分子印迹聚合物（duo-MIP）包被的磁性颗粒，从水溶液中去除甾体和酚类内分泌干扰化合物（EDCs）。研究了环境变量对结合效率的影响。实验结果表明，高达 10.0 mM 的 NaCl 不会影响 EDCs 的吸附量，高达 10.0 mg/L 的腐殖酸也不会显著干扰。在 pH 3.3 到 pH 6.8 范围内几乎没有影响，但在 pH 9 时开始下降。Freundlich 等温线参数表明结合能力的顺序为 DES > E2 ∼ E1 > BPA。使用在 10 μg/L 浓度下添加这些 EDCs 的河水样品验证了类选择性去除的适用性；雌酮（E1）、17β-雌二醇（E2）、双酚 A（BPA）和己烯雌酚（DES）的结合效率分别为 90%、90%、88%和 98%。重复使用研究验证了在经过 7 次再生循环后，结合容量保持不变，仅降低了<2%。
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