2016 (4) 5

https://doi.org/10.15407/polymerj.38.04.307

Photocatalytic degradation of methyl orange in the presence of maleoylchitosan and titanium dioxide

S.M. Kobilinskiy, L.A. Goncharenko, S.V. Riabov

Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivs’ke shose, Kyiv, 02160, Ukraine

Polym. J., 2016, 38, no. 4: 307-311.

Section: Structure and properties.

Language: Ukrainian.

Abstract:

The photocatalytic destruction of methyl orange (MO) in the presence of titanium dioxide and maleoylchitosan in the concentrations range of dye from 30 to 270 mg/l was studied. It was shown that the addition of carboxyl-containing chitosan to TiO2 suspension accelerates the photodestruction of dye in aqueous solutions. For instance, after UV exposure of the dye solution with a concentration of 135 mg/l for 60 minutes in the presence of titanium dioxide only, the MO destruction is equal to 22.6%, the amount of MO adsorbed on maleoylchitosan at the same time – 63.4%, while the action of both components simultaneously led to remove 96.8% of dye. Moreover, it was shown the forming different types of MO aggregates (H and J) on the sorbent. Research of the sorption kinetics of methyl orange showed that the sorpion on the partially substituted chitosan took place much faster than fully substituted due to different binding mechanism. Time of the adsorption saturation depends on the initial concentration of MO and was ranged from 90 to 400 min.

Key words: methyl orange, photodegradation, dioxide titanium, maleoylchitosan.

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