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Study of spectral and fluorescent properties of different samples of humic acids
Author(s): Irina V. Sokolova; Anastasia A. Kudlatskaya; Svetlana B. Selyanina; Olga N. Tchaikovskaya; Georgiy V. Mayer
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Paper Abstract

Depending on their origin and structure, humic acids (HAs) have a remarkable ability to absorb light and transfer this energy to other substrates and in some cases strongly affect photolysis of xenobiotics. This search exhibits several examples of spectral and fluorescent study of humics acids with different genesis. The group of studied HAs was isolated from an unditourified high-moor peat with different humidity in the Mezensky District of the Arkhangelsk Region. The standard commercial preparation of humic acids Aldrich was also studied. For photochemical studies, an excilamp on working molecules KrCl with λrad = 222 nm, developed at the Institute of High Current Electronics of the SB RAS, was used as sources of UV radiation. The results of direct and sensitized (in the presence of HAs) photolysis are discussed. For samples of HAs from the Arkhangelsk region, the dependence of the absorption spectra and fluorescence on the duration of drying and the depth of occurrence was found. The longer is the duration of drying of the samples, the lower is the optical density of the absorption spectra. In the process of humification and with the duration of peat drying, the fluorescence intensity of the HAs increases. The dependence of the fluorescence spectra of the studied samples on the wavelength of fluorescence excitation was found.

Paper Details

Date Published: 11 December 2019
PDF: 4 pages
Proc. SPIE 11322, XIV International Conference on Pulsed Lasers and Laser Applications, 113220L (11 December 2019); doi: 10.1117/12.2548710
Show Author Affiliations
Irina V. Sokolova, National Research Tomsk State Univ. (Russian Federation)
Anastasia A. Kudlatskaya, National Research Tomsk State Univ. (Russian Federation)
Svetlana B. Selyanina, Federal Scientific Research Centrum for Complex Learning of the Arctic (Russian Federation)
Olga N. Tchaikovskaya, National Research Tomsk State Univ. (Russian Federation)
Georgiy V. Mayer, National Research Tomsk State Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 11322:
XIV International Conference on Pulsed Lasers and Laser Applications
Victor F. Tarasenko; Anton V. Klimkin; Maxim V. Trigub, Editor(s)

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