Antioxidant activity of peat humic acids

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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 °С and high-temperature region 380-700 °С. 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.

Original languageEnglish
Title of host publicationEducation and Accreditation in Geosciences; Environmental Legislation, Multilateral Relations And Funding Opportunities
PublisherInternational Multidisciplinary Scientific Geoconference
Pages19-26
Number of pages8
Edition32
ISBN (Electronic)9786197105001, 9786197105988, 9786197105995, 9786197408003, 9786197408010, 9786197408027, 9786197408034, 9786197408041, 9786197408058, 9786197408065, 9786197408072, 9786197408089, 9786197408096, 9786197408102, 9786197408119, 9786197408126, 9786197408133
ISBN (Print)9786197408263
DOIs
Publication statusPublished - 2017
Event17th International Multidisciplinary Scientific Geoconference, SGEM 2017 - Albena, Bulgaria
Duration: 29 Jun 20175 Jul 2017

Publication series

NameInternational Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
Number32
Volume17
ISSN (Print)1314-2704

Conference

Conference17th International Multidisciplinary Scientific Geoconference, SGEM 2017
CountryBulgaria
CityAlbena
Period29.6.175.7.17

Keywords

  • Antioxidant activity
  • Humic acids
  • Macromolecule
  • Thermal-oxidative destruction
  • Treatment

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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