Abstract
1-(2-Pyridylazo)-2-Naphthol (PAN) doped sol-gel silica has been investigated for removal of metal ions from aqueous media. In the doped sol-gel silica, the large reagent molecules are entrapped inside the pores while small metal ions can diffuse into the pores where they are complexed by the reagent and retained inside the pores. This new solid sorbent was applied for removal of Cd(II) from aqueous solutions. The kinetics, adsorption isotherm, equilibration time and pH effect on the removal were studied to optimize the conditions to be utilized on a large scale. It was observed that a sol gel loaded with 0.09 mmol PAN/g, had a capacity of 0.044 mmol Cd/g. The desorption of metal ions was carried by 1 M HCl and the sol-gel silica sorbent could be regenerated and reused repeatedly.
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References
A. Wilczak and T.M. Keinath, Wat. Environ. Res. 65, 238 (1993).
Y.H. Kim, Sep. Sci. Tech. 35, 2327 (2000).
M. Prasad, S.S. Amriphate, and S.S. Saxena, ibid, 35, 2431 (2000)
M. Pagano, D. Petruzzelli, G. Tiravanti, and R. Passino, Solvent. Ext. Ion. Exch. 18, 387 (2000).
B.B. Saha, M. Iglesias, I.W. Cumming, and M. Streat, ibid, 18, 133 (2000).
S.M. Hasany and M.H. Chadhry, J. Radioanal. Nucl. Chem. Art. 89(2), 353 (1985).
H.E. Fu, Gongmin Allen, and C.E. Cowan, Soil Sci. 152, 72 (1991).
J.M. Randall, R.L. Bermann, V. Garrett, and A.C. Waiss Jr. Biotechnology. Bioeng. 37, 266 (1991).
J.M. Randall, Forest Prod. J. 27, 51 (1977).
S. Karabulut, A. Karabakan, A. Denizili, and Y. Yurum, Sep. Sci. Tech. 36(16), 2657 (2001).
E. Büyuktüncel, A. Tuncel, Ö. Genc, and A. Denizli, Sep. Sci. Tech. 36(15), 3427 (2001).
I. Kuselman, B.I. Kuyavskaya, and O. Lev, Anal. Chim. Acta 256, 65 (1992).
J. Lin and D. Liu, Anal. Chim. Acta 408, 49 (2000).
P.W. Wong and J.D. Mackenzie, in Better Ceramics Through Chemistry VI, edited by A.K. Cheetam, C.J. Brinker, M.L. Mecartney, and C. Sanchez (Mater. Res. Soc. Proc. 346, Pittsburgh, PA, 1994), p. 323.
P.W. Wong and J.D. Mackenzie, in Better Ceramics Through Chemistry VI, edited by A.K. Cheetam, C.J. Brinker, M.L. Mecartney, and C. Sanchez (Mater. Res. Soc. Proc. 346, Pittsburgh, PA, 1994), p. 329.
I. Atsuya and K. Itoh, Fresenius Z. Anal. Chem. 329, 750 (1988).
R.G. Anderson and G. Nickless, Analyst 92, 207 (1967).
Yu. A. Zolotov, I.M. Maksimova, E.I. Morosanova, and A.A. Velikorodny, Anal. Chim. Acta 308, 378 (1995).
E.J.A. Pope and J.D. Mackenzie, J. Non-Cryst. Solids 87, 185 (1986).
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Khan, A., Mahmood, F., Ahmed, S. et al. Removal of Cd Ions by Sol-Gel Silica Doped with 1-(2-Pyridylazo)-2-Naphthol. Journal of Sol-Gel Science and Technology 27, 221–224 (2003). https://doi.org/10.1023/A:1023762920505
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DOI: https://doi.org/10.1023/A:1023762920505