Kinetics of oxidation of an arabinogalactan from larch (Larix sibirica L.) in an aqueous medium in the presence of hydrogen peroxide |
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| Authors: | Borisov I M Shirokova E N Mudarisova R Kh Muslukhov R R Zimin Yu S Medvedeva S A Tolstikov G A Monakov Yu B |
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| Institution: | (1) Bashkir State University, 32 ul. Frunze, 450074 Ufa, Russian Federation;(2) Institute of Organic Chemistry, Ufa Research Center of the Russian Academy of Sciences, 71 prosp. Oktyabrya, 450054 Ufa, Russian Federation |
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| Abstract: | The oxidation of an arabinogalactan in an aqueous medium under the action of hydrogen peroxide and dioxygen is accompanied by accumulation of carbonyl and carboxy groups in the oxidized polysaccharide macromolecules and derived oligomers. The addition of iron sulfate accelerates the radical oxidation of the biopolymer, while the addition of phenol inhibits the oxidation. The influence of the temperature and the initial H2O2 and arabinogalactan concentrations on the kinetics of the initial oxidation stage of the natural polysaccharide was studied. |
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| Keywords: | polysaccharides arabinogalactan hydrogen peroxide oxidation process kinetics radical mechanism functionalization |
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