BIOLOGICALLY ACTIVE SUBSTANCES FOR REDUCING HEAVY METAL MIGRATION IN CONTAMINATED SOILS
ЛАСТАНҒАН ТОПЫРАҚТАРДАҒЫ АУЫР МЕТАЛДАРДЫҢ МИГРАЦИЯСЫН ТӨМЕНДЕТУГЕ АРНАЛҒАН БИОЛОГИЯЛЫҚ БЕЛСЕНДІ ЗАТТАР
БИОЛОГИЧЕСКИ АКТИВНЫЕ ВЕЩЕСТВА ДЛЯ СНИЖЕНИЯ МИГРАЦИИ ТЯЖЁЛЫХ МЕТАЛЛОВ В ЗАГРЯЗНЁННЫХ ПОЧВАХ
Sunakbaeva D.Kh. Yuldashbek D.Kh. Aitekova K. Ergashev Y.T.
2025National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2025#2025Issue 6230 - 245 pp.
With increasing anthropogenic pressure on the lithosphere and rising soil contamination by heavy metals (Pb, Cd, Zn, Cu, As), developing environmentally safe land-rehabilitation methods has become a key task in geotechnical and engineering geology. This study examines the influence of biologically active substances (Alt-6, Alt-7, Alt-S, Bentaktiv-alt-S) on heavy-metal mobility and uptake in the “soil–plant” system under controlled laboratory and micro-field conditions. The research focuses on surface soil horizons (0-20 cm), the upper layer of the lithogenic profile where contamination processes are most active. The effectiveness of biostimulants was assessed using atomic absorption spectrophotometry and stripping voltammetry. Results showed that applying these substances reduced the mobility and bioavailability of heavy metals, lowering their accumulation in edible plant parts by 10-86%, depending on the element and treatment. The greatest effect was achieved through combined pre-sowing seed treatment and foliar spraying, which also decreased soil toxicity and increased yields by 25-61%. The chemical composition of the tested substances was additionally considered: humic-containing regulators were characterized by humic acid fraction (52-58%), fulvic acids (12-15%), pH 6.5-7.2 and medium-molecular polymer structure, which determines their chelating ability. These findings are valuable for professionals in environmental monitoring, geoecology, soil protection, reclamation, and bioremediation. The study highlights the potential of biotechnological approaches in engineering-geological practices aimed at restoring agricultural productivity in areas affected by industrial activity, including mining and processing zones. The proposed methods can help mitigate environmental risks and enhance agroecosystem resilience in contaminated regions.
biologically active substances , environmental remediation , heavy metals , phytotoxicity , soil contamination
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Khoja Akhmet Yassawi International Kazakh-Turkish University, Turkestan, Kazakhstan
International Taraz university named after Sherkhan Murtaza, Taraz, Kazakhstan
Tashkent State Technical University, Tashkent, Uzbekistan
Khoja Akhmet Yassawi International Kazakh-Turkish University
International Taraz university named after Sherkhan Murtaza
Tashkent State Technical University
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Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026