Funct. Mater. 2020; 27 (1): 210-217.

doi:https://doi.org/10.15407/fm27.01.210

Adsorption properties of silica gel in situ modified with copolymers of 4-vinylpyridine and styrene towards ions of toxic metals

E.S.Yanovska1, L.O.Vretik1, O.U.Kondratenko2, O.A.Nikolaeva1, D.Sternik3

1T. Shevchenko Kyiv National University, 12 L.Tolstogo Str., 01033 Kyiv, Ukraine
2I. Franko Zhytomyr State University, 40 Velyka Berdychivska Str., 10008 Zhytomyr, Ukraine
3M. Curie-Sklodowska University, 2 Maria Curie-Sklodowska Sq., 20-031 Lublin, Poland

Abstract: 

In situ modification of silica gel surface was carried out with immobilization of organic copolymers synthesized by radical copolymerization of 4-vinylpyridine and styrene at different starting molar ratios. Immobilization of organic polymers on the silica gel surface was proved by IR-spectroscopy, thermogravimetric analysis coupled with mass spectrometry. All of the composites have adsorption activity towards microquantities of Cu(II), Pb(II) and Fe(III) ions in a neutral water medium. Composites based on the copolymer with an initial molar ratio 4-vinylpyridine:styrene 3:1 exhibited the best adsorption properties in accordance with the data of adsorption isotherms.

Keywords: 
adsorption, in situ modification, poly(4-vinylpyridine-co-styrene), organo-mineral composite.

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