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Extraction of polycyclic aromatic hydrocarbons from natural systems to establish the source of their supply
DOI: 10.21443/1560-9278-2026-29-2-299-311
Abstract. Polycyclic aromatic hydrocarbons have marker properties and serve as indicators of pollution sources associated with natural or man-made processes. During the extraction of PAHs from model mixtures using various solvents, it has been found that the use of n-hexane ensures high efficiency of compound extraction from surface water samples taken in areas with different anthropogenic loads (extract weight of 400–1900 µg/L). Using high-performance liquid chromatography, individual PAHs have been identified and their total content in the samples has been determined. Water from the area affected by the oil spill contains 0.25–0.37 µg/L PAHs, 78 % of which are low-molecular compounds (naphthalene, fluorene, phenanthrene). In waters from the area where oil production facilities are located, the total content is determined in the range of 0.40–1.10 µg/L; the main contribution (77 %) is made by high-molecular compounds [fluoranthene, pyrene, chrysene and benzo(a)pyrene]. Surface waters from coal mining areas contain PAHs in amounts of 0.24–0.88 µg/l; the presence of dibenz(a,h)anthracene (0.01–0.05 µg/l) has been noted in them. When calculating indicator ratios, it has been determined that the sources of PAH entry into surface waters from oil spill and coal mining areas are mainly natural, petrogenic and pyrogenic in nature. In areas with a load from the activities of oil producing enterprises, the entry of PAHs is caused by both petrogenic (fluid influx from strata) and anthropogenic (spill or combustion of oil products) processes.
Printed reference: Mukhortina N. A. Extraction of polycyclic aromatic hydrocarbons from natural systems to establish the source of their supply // Vestnik of MSTU. 2026. V. 29, No 2. P. 299-311.
Electronic reference: Mukhortina N. A. Extraction of polycyclic aromatic hydrocarbons from natural systems to establish the source of their supply // Vestnik of MSTU. 2026. V. 29, No 2. P. 299-311. URL: https://vestnik.mauniver.ru/v29_2_n108/12_Mukhortina_299-311.pdf.
