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
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