Nickel(II)-Imprinted Monolithic Columns for Selective Nickel Recognition

作者：Demiralay Ebru Cubuk; Andac Muge; Say Ridvan; Alsancak Guleren; Denizli Adil^*

来源：Journal of Applied Polymer Science, 2010, 117(6): 3704-3714.

DOI：10.1002/app.32269

• adsorption
• molecular imprinting
• molecular recognition

Ni(2+)-imprinted monolithic column was prepared for the removal of nickel ions from aqueous solutions. N-Methacryloyl-L-histidine was used as a complexing monomer for Ni(2+) ions in the preparation of the Ni(2+)-imprinted monolithic column. The Ni(2+)-imprinted poly(hydroxyethyl methacrylate-N-methacryloyl-L-histidine) (PHEMAH) monolithic column was synthesized by bulk polymerization. The template ion (Ni(2+)) was removed with a 4-(2-pyridylazo) resorcinol (PAR):NH(3)- NH(4)Cl solution. The water-uptake ratio of the PHEMAH-Ni(2+) monolith increased compared with PHEMAH because of the formation of nickel-ion cavities in the polymer structure. The adsorption of Ni(2+) ions on both the PHEMAH-Ni(2+) and PHEMAH monoliths were studied. The maximum adsorption capacity was 0.211 mg/g for the PHEMAH-Ni(2+) monolith. Fe(3+), Cu(2+), and Zn(2+) ions were used as competitive species in the selectivity experiments. The PHEMAH-Ni(2+) monolithic column was 268.8, 25.5, and 10.4 times more selective than the PHEMAH monolithic column for the Zn(2+), Cu(2+), and Fe(3+) ions, respectively. The PHEMAH-Ni(2+) monolithic column could be used repeatedly without a decrease in the Ni(2+) adsorption capacity.

• 出版日期2010-9-15