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MOLECULAR ARRANGEMENT AND SECONDARY STRUCTURE OF HUMIC SUBSTANCES

1 KLUČÁKOVA Martina
Co-authors:
1 VĚŽNÍKOVÁ Kateřina 1 CHYTILOVÁ Aneta 1 KALINA Michal
Institution:
1 Brno University of Technology, Faculty of Chemistry, Materials Research Centre, Brno, Czech Republic, EU, klucakova@fch.vutbr.cz
Conference:
8th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 19th - 21st 2016
Proceedings:
Proceedings 8th International Conference on Nanomaterials - Research & Application
Pages:
762-767
ISBN:
978-80-87294-71-0
ISSN:
2694-930X
Published:
17th March 2017
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
513 views / 288 downloads
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Abstract

Humic acids were fractionated using universal buffer solutions in the range of pH values 2-12. The methods of dynamic light scattering and gel-permeation chromatography were used to investigate the molecular organization of humic acids in eluates. The obtained results were supplemented by ultraviolet/visible spectrometry, measurement of the zeta potential, conductivity and pH values. Fractionated humic acids had the supramolecular character and their molecular organization was strongly affected by pH value of surrounding medium. Observed changes in the secondary structure of humic acids were connected with the changes in colloidal stability, particle size distribution, and polydispersity.

Keywords: Humic substances, molecular arrangement, conformation, particle size, zeta potential

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