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Title: ANTIOXIDANT ACTIVITY OF PEAT HUMIC ACIDS
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ANTIOXIDANT ACTIVITY OF PEAT HUMIC ACIDS
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1314-2704
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English
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32
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The article presents the study on the effect of thermal and acidic hydrolysis treatment on the antioxidant activity of humic acids. It clarifies the changes in macromolecule structure resulted from the variations in periphery/nucleus ratio. Using the differential-thermal analysis, kinetic parameters of humic acid thermal-oxidative destruction were determined. The studied samples of humic acids were divided into three groups: humic acids extracted from air-dried fen and terrestrial fuscum peat, humic acids subjected to the two-stage hydrolysis with 10% solutions of HCl and HF, humic acids thermally treated in decomposing gases of fen and terrestrial fuscum peat and subjected to the two-stage acidic hydrolysis. The relationship between DSC, DTG, TG curves characteristic parameters and peculiarities resulted from the treatment of humic acid macromolecule was established. The kinetic parameters of thermal-oxidative destruction within two temperature regions were defined: low-temperature region 150-380 °? and high-temperature region 380-700 °?. Z coefficient that allowed defining the number of low-molecular fractions in humic acid macromolecule was calculated. It was proved that treatment of humic acid increases its antioxidant activity.
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conference
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17th International Multidisciplinary Scientific GeoConference SGEM 2017
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17th International Multidisciplinary Scientific GeoConference SGEM 2017, 29 June - 5 July, 2017
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
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19-26
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29 June - 5 July, 2017
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website
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cdrom
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3395
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humic acids; treatment; thermal-oxidative destruction; macromolecule; antioxidant activity.
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