Removal of water-soluble acid dyes from water environment using a novel magnetic molecularly imprinted polymer.
Novel magnetic and hydrophilic molecularly imprinted polymers (mag-MIPs) were prepared by an inverse emulsion-suspension polymerization to remove water-soluble acid dyes from contaminated water with 1-(α-methyl acrylate)-3-methylimidazolium bromide (1-MA-3MI-Br) being utilized as a new functional monomer. The thermal stability, chemical structure and magnetic property of the 1-MA-3MI-Br-mag-MIPs were characterized by the thermal-gravimetric analyzer (TGA), Fourier transform infrared spectrometer (FT-IR) and vibrating sample magnetometer (VSM), respectively. Moreover, effect of concentration and pH value of water-soluble acid dye solutions was optimized. Compared with the methyl acrylic acid and 4-vinylpyridine modified mag-MIPs, the 1-MA-3MI-Br-mag-MIPs showed enhanced removal efficiency. Kinetic studies depicted that the adsorption process on 1-MA-3MI-Br-mag-MIPs followed pseudo-second-order rate mechanism. Investigation results of 5 times removal-regeneration cycles by employing the 1-MA-3MI-Br-mag-MIPs showed that the resulting material was with high stability.
College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China. luoxubiao@126.com
Xubiao
X
Luo
Youcai
Y
Zhan
Yining
Y
Huang
Lixia
L
Yang
Xinman
X
Tu
Shenglian
S
Luo
D000143:Acids / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry / Q000302:isolation & purification*; D007700:Kinetics; D008280:Magnetics; D011108:Polymers / Q000737:chemistry*; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*
D000143:Acids; D004396:Coloring Agents; D011108:Polymers; D014874:Water Pollutants, Chemical; D014867:Water