Modification of Silica Gel with 1,10-Phenanthroline for Cd(II) and Pb(II) Adsorption

  • Ofelia D. Giron Institute of Chemistry/Natural Sciences Research Institute, University of the Philippines, Quezon City
  • Rio Carlo M. Lirag Natural Sciences Research Institute, University of the Philippines, Quezon City
  • Susan D. Arco Institute of Chemistry/Natural Sciences Research Institute, University of the Philippines, Quezon City
  • Leni L. Quirit Institute of Chemistry/Natural Sciences Research Institute, University of the Philippines, Quezon City
Keywords: silica gel, phenanthroline, Pb(II)-phenanthroline complex, Cd(II)-phenanthroline complex

Abstract

Silica  gel  was  modified  via  silylation  using  3-chloropropyltrimethylsilane  and functionalization  using  1,10-phenanthroline.  FTIR,  DSC  and  quantitative  SEM-EDX  data were obtained to confirm functionalization. The uptakes of cadmium (II) and lead (II) by the phenanthroline-modified  silica  (Phen-Si)  were  determined  using  equilibrium  and  dynamic methods.  For  the  equilibrium  method,  percent  adsorbed  for  5  to  200  ppm  metal  ion solutions  ranged  from  0  %  to  93.2  %  (for  Cd)  and  from  81.6  %  to  95.2  %  (for  Pb)  The maximum  uptake  of  Phen-Si  is  91.89  mg  Pb/g  silica  and  93.06  mg  Cd/g  silica  for  the equilibrium method while for the dynamic method, maximum uptake was 25.65 ± 6.52 mg Pb/g silica and 17.68 ± 2.33 mg Cd/g silica.

References

Coates GE, Green MLH, Powell P, Wade K. Principles of Organometallic Chemistry. London: Methuen and Co. Ltd.; 1965.

Huang X, Chang X, He Q, Cui Y, Zhai Y, Jiang N. Tris(2-aminoethyl) amine functionalized silica gel for solid-phase extraction and preconcentration of Cr(III), Cd(II) and Pb(II) from waters. J Hazard Mater. 2008; 157:154-160.

Jal PK, Patel S, Mishra BK. Chemical modification of silica surface by immobilization of functional groups for extractive concentration of metal ions. Talanta. 2004; 62(5):1005-1028.

Mikula B, Puzio B, Feist B. Application of 1,10-phenanthroline for preconcentration of selected heavy metals on silica gel. Microchim Acta. 2009; 166(3):337-341.

Padmaja N, Babu MS, Rao GN, Rao RS, Ramana KV. Effect of urea on the speciation of 1,10-phenanthroline complexes of toxic metal ions—computer augmented modelling studies. Polyhedron. 1990; 9(20):2497-2506.

Park JY, Jung K, Park KK, Eom TY. Hydrophobic Effects of o-Phenanthroline and 2,2′-Bipyridine on Adsorption of Metal(II) Ions onto Silica Gel Surface. J. Colloid Interf Sci. 1993; 160(2):324-331.

Silverstein RM, Webster FX, Kiemle DJ. Spectrometric Identification of Organic Compounds. 7th ed. New Jersey: John Wiley & Sons, Inc.; 2005. p. 120-121.

Zaporozhets O, Gawer O, Sukhan V. Determination of Fe(II), Cu(II) and Ag(I) by using silica gel loaded with 1,10-phenanthroline. Talanta. 1998; 46(6):1387-1394.

Zaytsev VN, Trofimchook AK. Ukr Khim Zh. 1984; 50:1126.

Published
2013-01-21
How to Cite
Giron, O. D., Lirag, R. C. M., Arco, S. D., & Quirit, L. L. (2013). Modification of Silica Gel with 1,10-Phenanthroline for Cd(II) and Pb(II) Adsorption. KIMIKA, 24(1), 18-24. https://doi.org/10.26534/kimika.v24i1.18-24
Section
Research Articles