Synthesis, characterization, and adsorption performance of Pb(II)-imprinted polymer in nano-TiO2 matrix.
Surface ion-imprinted in combination with sol-gel process was applied to synthesis a new Pb(II)-imprinted polymer for selective separation and enrichment of trace PbO(II) from aqueous solution. The prepared material was characterized by using the infrared spectra, X-ray diffractometer, and scanning electron microscopy. The batch experiments were conducted to study the optimal adsorption condition of adsorption trace Pb(II) from aqueous solutions on Pb(II)-imprinted polymer. The equilibrium was achieved in approximately 4.0 h, and the experimental kinetic data were fitted the pseudo second-order model better. The maximum adsorption capacity was 22.7 mg/g, and the Langmuir equation fitted the adsorption isotherm data. The results of selectivity experiment showed that selectively adsorbed rate of Pb(II) on Pb(II)-imprinted polymer was higher than all other studied ions. Desorption conditions of the adsorbed Pb(II) from the Pb(II)-imprinted polymer were also studied in batch experiments. The prepared Pb(II)-imprinted polymer was shown to be promising for the separation and enrichment of trace Pb(II) from water samples. The adsorption and desorption mechanisms were proposed.
Li
Chunxiang
C
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China. cicity@hotmail.com
Gao
Jie
J
Pan
Jianming
J
Zhang
Zulei
Z
Yan
Yongsheng
Y
D000327:Adsorption; D048271:Chitosan / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007854:Lead / Q000302:isolation & purification*; D054802:Molecular Imprinting; D049329:Nanostructures; D011108:Polymers / Q000138:chemical synthesis; D017550:Spectroscopy, Fourier Transform Infrared; D013816:Thermodynamics; D014025:Titanium / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014961:X-Ray Diffraction
D011108:Polymers; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D007854:Lead; D048271:Chitosan; D014025:Titanium