Authors: ZherebtsovS.I., MalyshenkoN.V., VotolinK.S., AndrokhanovA.A., SokolovD.A., DugarjavJ., IsmagilovZ.R.

Title of the article: Humic preparations: relation between structural group composition and biological activity

Year: 2018, Issue: 5, Pages: 52-60

Branch of knowledge: Chemical technology

Index UDK: 662.73: 547.992.2: 631.811.98

DOI: 10.26730/1999-4125-2018-5-52-60

Abstract: Processes of territories’ desertification the South Russia, the countries of Central Asia, Kazakhstan and Mongolia represent a global environmental problem. Development of methods and preparations for combating desertification is a relevant problem. The native and modified humic acids (HA) from brown coals of Russia and Mongolia were studied. All HA have been characterized with the help of technical and elemental analysis, 13C NMR (CPMAS) spectroscopy. The biological activity of humic preparations in the form of humates of sodium and potassium is investigated depending on structural and group parameters: degrees of aromaticity (fa), hydrophilic-hydrophobic parameter (fhh) and aromaticity/aliphaticity parameter (far/al). Assessment of bio-logical activity of the native and modified humates was carried out on seeds of wheat and a garden radish. Destructive alkylation and removal of bitumen changes structural group composition of humic acids and increases degrees of aromaticity. Тhe biological activity of HA is directly proportional to the following structural parameters: degrees of aromaticity (fa), hydrophilic-hydrophobic parameter (fhh) and aromaticity/aliphaticity parameter (far/al).

Key words: desertification humic acids brown coal structural parameters biological activity

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