Home > Archive > No. 1–2 (193–194) 2024 > 113–129
Geology & Geochemistry of Combustible Minerals No. 1–2 (193–194) 2024, 113–129
https://doi.org/10.15407/ggcm2024.193-194.113
Myroslava YAKOVENKO1, Yurii KHOKHA2
Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine, e-mail: 1 myroslavakoshil@ukr.net; 2 khoha_yury@ukr.net
Abstract
The problems of peat analysis using near-infrared reflectance (NIR) and mid-infrared reflectance (MIR) spectroscopy methods are considered.
Infrared spectroscopic researches of selected peat samples in a vertical section (depth 0–140 cm) from the Honchary deposit of the Lviv Region were carried out using instrumental analytical methods of infrared spectroscopy (near-infrared reflectance, NIR and mid-infrared reflectance, MIR) in order to determine the characteristics of the chemical group composition, mineral and organic components of peat to assess the quality of peat and its further exploitation in various industries.
As a result, the spectra of chemical compounds were identified, among which the largest number are: hydroxyl, methylene, methyl and aromatic groups.
Direct analysis of infrared spectrogram sections of the studied peat showed significantly greater informativeness of IR spectroscopy in the mid-infrared range (400–4000 cm−1) in contrast to the mid-infrared frequency range (from 3900 to 7400 cm−1).
The possibility and effectiveness of using near- and mid-infrared spectroscopy methods to analyze the chemical composition of peat and obtain information on the structure of organic matter at the level of functional groups has been assessed.
The advantage of this method in comparison with other instrumental research methods is also its speed and expressivity – the total time required for the preparation and analysis of peat samples was less than 5 minutes compared to 10–16 hours required for determining the content of moisture, proteins, lipids and ash by reference standard methods.
Near-infrared reflectance (NIR) and mid-infrared reflectance (MIR) spectroscopy methods can be used and effectively applied in combination with other methods as an analytical tool for peat quality monitoring, simultaneous measurement of several quality parameters and its further use in various industries and development of environmentally friendly technologies.
Keywords
peat, mineral and organic composition, infrared spectroscopy, near-infrared spectroscopy, mid-infrared spectroscopy, functional groups, peat quality
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