Adsorption Properties of Bentonite with In Situ Immobilized Polyaniline Towards Anionic Forms of Cr(VI), Mo(VI), W(VI), V(V)

  • Kateryna RYABCHENKO Kyiv National Taras Shevchenko University
  • Elina YANOVSKA Kyiv National Taras Shevchenko University
  • Mariya MELNYK Kyiv National Taras Shevchenko University
  • Dariusz STERNIK Maria Curie-Skłodowska University
  • Olga KYCHKIRUK Ivan Franko Zhytomyr State University
  • Valentun TERTYKH Chuiko Institute of Surface Chemistry of the National Academy of Sciences of Ukraine
Keywords: bentonite, polyaniline, in situ immobilization, composite, adsorption, W-, Mo-, V- and Cr-containing ions

Abstract

A new composite material bentonite-PANI was synthesized by in situ immobilization of polyaniline (PANI) on the surface of natural mineral bentonite. It was established as a result of the modification of bentonite a surface area and an interlayer distance of mineral decrease and particles of bentonite transformed of irregular shape with different porosity on irregularly shaped particles of smaller size. It has been found that the total Cr(VI) ions extraction took place under the acid conditions (pH=12) and W(VI) ions have been well adsorbed in the pH range from 1 to 8 by the composite bentonite-PANI unlike the initial mineral. Whereas adsorption of oxo anions of V(V) and Mo(VI) made up some 50%. It is proved that the in situ immobilization of bentonite by polyaniline leads to increasing the value of adsorption capacity towards the investigated ions compared with the initial mineral. It was established that the adsorption properties of the synthesized composite with respect to the studied oxo ions were worse than the adsorption properties of composite vermiculite-PANI, similar to the composite Sokyryntsyy clinoptilolite-PANI and better than composites of polyaniline with Podilskyy saponite and Karelian shungite.

DOI: http://dx.doi.org/10.5755/j01.ms.22.2.6976

Author Biographies

Kateryna RYABCHENKO, Kyiv National Taras Shevchenko University
Chemistry Faculty
Elina YANOVSKA, Kyiv National Taras Shevchenko University
Chemistry Faculty
Mariya MELNYK, Kyiv National Taras Shevchenko University
Chemistry Faculty
Olga KYCHKIRUK, Ivan Franko Zhytomyr State University
Department of Sciences
Published
2016-06-01
Section
POLYMERS AND COMPOSITES