Sains Malaysiana 39(5)(2010): 829–835

 

Synthesis and Characterization of a Molecularly Imprinted Polymer for Pb2+ Uptake Using 2-vinylpyridine as the Complexing Monomer

(Sintesis dan Pencirian Polimer Cetak Molekul untuk Pengambilan Pb2+ Menggunakan 2-vinilpyridin Sebagai Monomer Pengkompleks)

 

Nor Azah Yusof*, Appri Beyan, Md. Jelas Haron & Nor Azowa Ibrahim

Chemistry Department, Faculty of Science

Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia

 

Diserahkan: 19 November 2009 / Diterima: 8 Februari 2010

 

ABSTRACT

 

Molecularly imprinted polymer (MIP) particles for selective extraction of Pb2+ ion from aqueous media were prepared using non-covalent molecular imprinting methods. 2-vinylpyridine was chosen as the complexing monomer. The imprinted polymer was synthesised by radical polymerisation. The template (Pb2+) was removed by leaching with 0.1 M HCl. The polymer particles (imprinted and non-imprinted) were characterised by spectroscopy. The effect of different parameters such as pH, kinetic, adsorption isotherm and selectivity were evaluated. The maximum adsorption capacity is 150 μg Pb2+/mg MIP. The adsorption efficiently occurred at pH 6. The selectivity coefficients of the imprinted polymer particles for Pb2+/Zn2+ and Pb2+/Al3+ were 13.55 and 1.71, respectively.

 

Keywords: Ion imprinting; metal extraction; molecular recognition; Pb2+ removal

 

ABSTRAK

 

Partikel polimer cetak molekul (MIP) untuk pengekstrakan selektif Pb2+ daripada media akuas telah disediakan menggunakan kaedah cetakan molekul bukan kovalen. 2-vinylpyridine telah dipilih sebagai monomer pengkompleks. Polimer cetak telah disintesis menggunakan pempolimeran radikal. Templat (Pb2+) telah disingkirkan menerusi pelunturan dengan 0.1 M HCl. Partikel polimer (cetakan dan bukan cetakan) telah dibuat pencirian menggunakan IR. Kesan bagi pelbagai parameter seperti pH, kinetic, isotem jerapan dan selektiviti telah dinilaikan. Kebolehan jerapan maksimum adalah 150 μg Pb2+/mg MIP. Jerapan adalah cekap pada pH 6. Pekali selektiviti bagi partikel polimer cetak bagi Pb2+/Zn2+ dan Pb2+/Al3+ adalah masing-masing 13.55 dan 1.71.

 

Kata kunci: Cetakan ion; pengecaman molekul; pengekstrakan logam; penyingkiran Pb2+

 

RUJUKAN

 

Allen S.J., Mckay G. & Porter J.F. 2004. Adsorption isotherm models for basic dye adsorption by peat in single and binary component systems. Journal of Colloid and Interface Science 280: 322-333.

Andac M., Mirel S., Senel S., Say R., Ersoz A. & Denzli A. 2007. Ion-imprinted beads for molecular recognition based mercury removal from human serum. Biological Macromolecules 40: 159-166.

Andac M., Say R. & Denizli A. 2004. Molecular recognition based cadmium removal from human plasma. Journal of Chromatography B 811: 119-126.

Araki K., Maruyama T., Kamiya N. & Goto M. 2005. Metal ion-selective membrane prepared by surface molecular imprinting. Journal of Chromatography B. 818 141-145.

Birlik E., Ersoz A., Acikkalp E., Denizli A. & Say R.. 2006. Cr (III) imprinted polymeric beads: Sorption and preconcentration studies. Journal of Hazardous Materials 140 (1-2): 110-116.

Blanco-Lo’pez M.C., Lobo-Castan”o’n M.J., Miranda-Ordieres A.J. & Tun”o’n-Blanco P. 2003. Voltammetric sensor for vanillylmandelic acid based on molecularly imprinted polymer-modified electrodes. Biosensors and Bioelectronics 18: 353-362.

B”uy”uktiryaki S., Say R., Denizli A. & Ers”oz A. 2007. Mimicking receptor for methylmercury preconcentration based on ion-imprinting. Talanta 71: 699-705.

Elinde C. G. & Friberg L.1980. Handbook on The Toxicology of Metals. Amsterdam: Elsevier North-Holland Biomedical Press.

Khajeh M., Yamini Y., Ghasemi E., Fasih J. & Shamsipur M. 2007. Imprinted polymer particles for selenium uptake: Synthesis, characterization and analytical applications. Analytica Chimica Acta 581: 208-213.

Liu Y., Chang X., Wang S., Guo Y., Din B. & Meng S. 2004. Solid-phase extraction and preconcentration of cadmium(II) in aqueous solution with Cd(II)-imprinted resin (poly-Cd(II)-DAAB-VP) packed columns. Analytica Chimica Acta 519: 173-179.

Mayes A.G. & Whitcombe M.J. 2005. Synthetic strategies for the generation of molecularly imprinted organic polymers. Advanced drug Delivery Reviews 57: 1742-1778.

Milojkovic S.S., Dusan K., Comor J.J. & Nedeljkovic J.M. 1997. Radiation induced synthesis of molecularly imprinted polymers. Polymer 38(11): 2853-2855.

Moral N. P. & Mayes A.G. 2004. Comparative study of imprinted polymer particles prepared by different polymerization methods. Anal. Chim. Acta 504: 15-21.

Nishide H., Deguchi J. & Thuchida E. 1977. Adsorption of metal Ions on Crosslinked Poly(4-vinylpyridine)Resin Prepared with a Metal Ion as Template. Journal of Polymer Science 15: 3023-3029.

Say R., Birlik E., Ersoz A., Yilmaz F., Gedikbey T. & Denizli A. 2003. Preconcentration of Copper on Ion-selective imprinted polymer microbeads. Analytica Chimica Acta 480: 251-258.

Yavuz H., Say R. & Denizli A. 2005. Iron removal from human plasma based on molecular recognition using imprinted beads. Materials Science & Engineering C 25: 521-528.

Zhang L.Y., Chend G.X. & Fu C. 2003. Synthesis and characteristic of tyrosinase imprinted beads via suspension polymerization. React. Funct. Polym. 56: 167-173.

 

*Pengarang untuk surat-menyurat; email: azah@science.upm.edu.my

   

 

 

sebelumnya