title: Duo-molecularly imprinted polymer-coated magnetic particles for class-selective removal of endocrine-disrupting compounds from aqueous environment.
abstract: 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.
authors.affiliation: Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6.
authors.forename: Xinlong
authors.initials: X
authors.lastname: Xia
authors.forename: Edward P C
authors.initials: EP
authors.lastname: Lai
authors.forename: Banu
authors.initials: B
authors.lastname: Örmeci
mesh_terms: D002851:Chromatography, High Pressure Liquid; D052244:Endocrine Disruptors / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010636:Phenols / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013256:Steroids / Q000737:chemistry; D053719:Tandem Mass Spectrometry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014877:Water Pollution, Chemical / Q000517:prevention & control*
chemical_list: D052244:Endocrine Disruptors; D058185:Magnetite Nanoparticles; D010636:Phenols; D011108:Polymers; D013256:Steroids; D014874:Water Pollutants, Chemical; D012965:Sodium Chloride