PROCEEDINGS OF THE SHEVCHENKO SCIENTIFIC SOCIETY

Chemical Sciences

Archive / Volume LXVI 2021

Yuliia STETSIV, Іrynа ZHURAVETS’KA, Мykhaylo YATSYSHYN, Аnatoliy ZELINSKIY, Оleksandr RESHETNYAK

Ivan Franko National University of Lviv, Kyryla i Mefodiya Str., 6, 79005 Lviv, Ukraine. e-mail: yuliia.stetsiv@lnu.edu.ua

DOI: https://doi.org/10.37827/ntsh.chem.2021.66.019

THIN POLYANILINE FILMS ON A POLYETHYLENE TEREPHTHALATE SUBSTRATE AS Cr(VI) ADSORBENTS

This work deals with the modification of polyethylene terephthalate film substrate-matrix in situ by polyaniline in the aniline oxidation process, as well as their use as adsorbents to reduce the highly toxic Cr(VI) to less toxic Cr(III).
Polyethylene terephthalate films were coated with a layer of polyaniline in aqueous solutions of 0.5 M citric acid at a temperature of 293 K. The structure of polyethylene terephthalate/polyaniline films was examined by X-ray diffraction, scanning electron microscopy, FT-IR and UV-vis spectroscopy.
Adsorption was investigated on polyaniline films obtained and washed with distilled water after synthesis, as well as on films additionally doped in citric acid solution. The adsorption of Cr(VI) from aqueous solutions of different concentrations: 10 and 40 mg/L, was studied. The change in electronic spectra was observed using a UV-B spectrophotometer. It is shown that 80–85 % of Cr(VI) is adsorbed by polyaniline films in neutral media during 10 min.
It was found that polyaniline is oxidized to pernigraniline in the process of reduction of Cr(VI) to Cr(III). Adsorption studies have shown that polyaniline films on the surface of polyethylene terephthalate films can be an effective adsorbent of Cr(VI) from aqueous solutions. As a result of research, it have been proposed easy-to-prepare, ecological and highly efficient adsorbents based on polyaniline films on flexible polyethylene terephthalate film substrates for removing Cr(VI) from aqueous solutions.

Keywords: polyaniline, polyethyleneterephthalate, citric acid, chromium, adsorption

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How to Cite

STETSIV Y., ZHURAVETS’KA I., YATSYSHYN M., ZELINSKIY A., RESHETNYAK O. THIN POLYANILINE FILMS ON A POLYETHYLENE TEREPHTHALATE SUBSTRATE AS Cr(VI) ADSORBENTS. Proc. Shevchenko Sci. Soc. Chem. Sci. 2021 Vol. LXVI. P. 19-33.

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