SEQUENTIAL EXTRACTION-BASED SPECIATION OF HEAVY METALS IN CONTAMINATED MINING SOILS

Shukurov Nosir Egamovich; Makhammatov Anzor Bobir ugli

Authors

Shukurov Nosir Egamovich H.M. Abdullayev Institute of Geology and Geophysics
Makhammatov Anzor Bobir ugli PhD Candidate at the National University of Uzbekistan named after Mirzo Ulugbek

Keywords:

Mining industry, technogenic pollution, heavy metals, soil geochemistry, sequential extraction, chemical fractionation, metal migration, environmental monitoring.

Abstract

Mining and metallurgical activities lead to the emission of heavy metals and subsequent soil contamination. This study investigates the distribution and chemical speciation of heavy metals in soils from mining-affected areas. Sequential extraction (Tessier method) and atomic absorption spectroscopy (AAS) were applied to determine metal fractions. The results indicate that Cu, Pb, Zn, and Cd are mainly present in mobile and bioavailable forms, while Ni and Cr are predominantly associated with lithogenic fractions. These findings confirm the technogenic nature of soil pollution. The results are important for environmental monitoring, risk assessment, and sustainable land management.

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