Chitosan Immobilized on Silica Surface for Wastewater Treatment

  • Tetyana BUDNYAK Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • Valentin TERTYKH Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • Elina YANOVSKA Taras Shevchenko National University of Kyiv
Keywords: adsorption, chitosan, silica, toxic metals removal, wastewater treatment

Abstract

Adsorbents of natural origin are widely used for industrial wastewater treatment in order to replace current costly methods of heavy metals removing from solutions. For that purpose, immobilization of chitosan on the silica gel surface by crosslinking of adsorbed biopolymer with glutaraldehyde was carried out. Anchorage of chitosan on the silica surface was confirmed by IR spectroscopy. Concentration of immobilized chitosan was estimated using thermogravimetric analysis. The adsorption of microquantities of Zn(II), Cu(II), Cd(II), Pb(II), Fe(III), V(V) and Mo(VI) ions from aqueous solutions by obtained composite has been studied. The highest sorption capacities were observed with respect to zinc (0.46 mmol/g), molybdenum- and vanadium-containing ions (0.31 mmol/g). Diffuse reflectance electronic spectra of samples with different content of adsorbed metal and kinetic adsorption characteristics of the composite adsorbent were estimated.

DOI: http://dx.doi.org/10.5755/j01.ms.20.2.4975

Author Biographies

Tetyana BUDNYAK, Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
PhD student, Chemisorption Department
Valentin TERTYKH, Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
Dr. (sci.), Professor of Chemistry, Head of Chemisorption Department
Elina YANOVSKA, Taras Shevchenko National University of Kyiv
PhD, Assosiate Professor of Inorganic Chemistry division of Chemistry Department
Published
2014-06-13
Section
POLYMERS AND COMPOSITES, WOOD