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Preparation of Modified Silica for Heavy Metal Removal
School of Chemical Engineering, Seoul National University, San 56-1, Shinlim, Seoul 151-742, Korea
Korean Journal of Chemical Engineering, January 2000, 17(1), 118-121(4), 10.1007/BF02789264
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Abstract
2-hydroxy-5-nonyl-acetophenoneoxime, di-2,4,4-trimethylpentyl phosphinic acid, a teriary amine were bound on the silica surface after surface modification. The adsorption of the metal chelating agents appears to be due to physical attraction such as van der Waals interactions and not covalent bonding. Stability tests show that the adsorbents are stable under acidic conditions. Batch tests were conducted for heavy metal ion adsorption and elution. Heavy metal ions which were adsorbed to the surface of the adsorbents could be recovered by elution with 0.1 M HCI.
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References
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Deorkar NV, Tavlarides LL, Ind. Eng. Chem. Res., 36(2), 399 (1997)
Fadeeva VI, Tikhomirova TI, Yuferova IB, Kudryavtsev GV, Anal. Chim. Acta, 219, 201 (1989)
Mahmoud M, Soliman E, Talanta, 44, 15 (1997)
Marshall M, Mottola H, Anal. Chem., 55, 2089 (1983)
Ritcey G, Ashbrook A, "Solvent Extraction," Part I, Elsevier, Amsterdam (1984)
Shriver DF, Atkins PW, Langford CH, "Inorganic Chemistry," Oxford University Press (1994)
Stumn W, "Chemistry of the Solid-Water Interface," John Wiley & Sons, Inc. (1992)
Tikhomirova TI, Fadeeva VI, Kudryavtsev GV, Nesterenko PN, Talanta, 38, 267 (1991)
Unger KK, "Packing and Stationary Phases in Chromatographic Techniques," Marcel Dekker, New York (1990)
Valsaraj KT, Sep. Sci. Technol., 27, 1633 (1992)
Warshawsky, "Extraction with Solvent Impregnated Resins, Ion Exchange and Solvent Extraction," Marinsky, J. and Marcus, Y., eds., Marcel Dekker, New York, 8 (1981)
Weetall HH, "Covalent Coupling Methods for Inorganic Supports Materials," Methods in Enzymology, Academic Press, 135 (1987)
Wu J, Harwell JH, O'Rear EA, Colloids Surf., 26, 155 (1987)
