Ultrasonication‐assisted synthesis of molecularly imprinted polymer‐encapsulated magnetic nanoparticles for rapid and selective removal of 17β‐estradiol from aqueous environment

Abstract

Molecularly imprinting technique was combined with magnetic nanoparticles to synthesize molecularly imprinted polymer‐encapsulated particles for selective removal and efficient separation of estrogenic compounds from water. The core‐shell‐structured particles were successfully prepared by a novel 2‐h ultrasonication‐assisted synthesis in a mixture of water and organic solvent using dual‐layer surfactant‐modified magnetic particles as core, the most physiologically active estrogenic compound (17β‐estradiol) as template, and widely adapted methacrylic acid as functional monomer. Ultraviolet–visible spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, and magnetic separation were used to characterize the particles. High‐performance liquid chromatography–tandem mass spectrometry was used for quantitative binding performance analysis at low‐nanogram per milliliter levels. The particles exhibited satisfactory recognition of 17β‐estradiol in water. They possessed great potential for rapid, cost‐effective, and efficient separation of estrogenic compounds from aqueous environment with specificity. POLYM. ENG. SCI., 2012. © 2012 Society of Plastics Engineers

Molecularly imprinted poly(acrylonitrile‐co‐acrylic acid) matrix with sclareol

“…Batch binding experiments are common experiments for testing the adsorption capacities of the prepared MIPs . In this work, the variation of the binding capacity of the imprinted polymers depending on the analyte concentration (five concentrations: 0.1, 0.2, 0.3, 0.4, and 0.5% sclareol in ethanol) was evaluated from batch binding adsorption studies carried in the following conditions: 30 vials, five for each type of polymer pearls (S‐MIP‐AN:AA‐90:10, S‐MIP‐AN:AA‐80:20, S‐MIP‐AN:AA‐70:30, NIP‐AN:AA‐90:10, NIP‐AN:AA‐80:20, and NIP‐AN:AA‐70:30), each one containing 100 mg pearls were contacted with 8 mL from the initially prepared ethanol solutions (0.1–0.5% sclareol).…”

“…The Fourier transform infrared (FT‐IR) spectroscopy measurements are also very much applied, being able to prove the new bonds created in the imprinting process and the breaking of these bonds in the extraction process . For example, using the FT‐IR spectroscopy, it was confirmed the presence of the imprinted sites for the estrone template .…”

Magnetic hydrogel for better adsorption of heavy metals from aqueous solutions

“…31 Nanosized magnetic materials are recently developed and it has 32 applications in many fields including separation, drug delivery, 33 tissue engineering [11][12][13] etc. The magnetic materials with 34 modified surface functionalities are recently been developed for 35 removal of heavy metals and dyes from aqueous solution [14][15][16]. 36 Hydrogels, a three dimensional polymeric materials can be used as 37 a template for the synthesis of magnetic nano particles and 38 structures.…”

“…Cd reaches the water 13 bodies through paint, deterioration of galvanised pipes etc. 14 According to Indian standard specifications for drinking water 15 (IS:10500) and United State Environmental Protection Agency 16 (EPA) the desirable limit of Zn and Cd in drinking water is 5.0- 17 10.0 mg L À1 and 0.01 mg L À1 , respectively. The level of Zn beyond 18 5 mg L À1 can cause astringent taste, appear opalescent in water 19 and cause health problems such as stomach cramps, nausea and 20 pancreas damage if taken in excess.…”

Preparation of Surface-Imprinted Polymer Magnetic Nanoparticles with Miniemulsion Polymerization for Recognition of Salicylic Acid

“…B. Wang et al 2006;Zhang et al 2009), sol-gel (Chang, Chen, and Li 2012;Gao et al 2011;), emulsion polymerization (Gu et al 2010;Xia, Lai, and Ormeci 2012), and miniemulsion polymerization (Ji et al 2009;Tan and Tong 2007;Tan et al 2008). MMIPs microspheres were synthesized by suspension polymerization (X.…”