Assessment of the levels of heavy metal pollution in roadside soils of Termiz – Taskent, Uzbekistan

Kholikulov, Shodi Turdukulovich; Erdem, Halil; Bobobekov, Isomiddin Nuriddinovich; Demir, Saniye; Gence, Cabir Çağrı

doi:10.12911/22998993/199700

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Tytuł artykułu

Assessment of the levels of heavy metal pollution in roadside soils of Termiz – Taskent, Uzbekistan

Autorzy

Kholikulov Shodi Turdukulovich , Erdem Halil , Bobobekov Isomiddin Nuriddinovich , Demir Saniye , Gence Cabir Çağrı

Treść / Zawartość

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26_Kholikulov_Assessment_JEE_2025_03.pdf

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Identyfikatory

DOI

10.12911/22998993/199700

Warianty tytułu

Języki publikacji

Abstrakty

This study investigates the contamination of roadside soils by heavy metals (Pb, Zn, Ni, and Mo) along the Tashkent-Termiz International M-39 highway, utilizing indices such as the enrichment factor (EF), geo-accumulation index (Igeo), and pollution load index (PLI). Soil samples collected at 21 distances (5–1000 m) indicate that metal concentrations decrease with distance from the road, with rapid reductions observed within the 5–100 m range. Pb levels decline from 24 mg kg^-1 at 5 m to 1.4 mg kg^-1 at 1000 m, while Zn reduces from 26.3 mg kg^-1 to 2.1 mg kg^-1. Ni and Mo follow similar trends, but Mo exhibits lower mobility. Pb, Zn, and Ni stand out as indicators of anthropogenic pollution, with high correlation values between their DTPA-extractable and total concentrations (R²: Pb = 0.953, Zn = 0.930, Ni = 0.932). The Igeo values reveal moderate to high contamination near the road, particularly for Pb and Zn. The EF values for Mo (2.06) suggest moderate enrichment due to anthropogenic sources, such as traffic emissions, while Pb (0.76), Zn (0.89), and Ni (0.93) show minimal enrichment. PLI values of 4.24, 4.03, 3.63, and 4.87 for Pb, Zn, Ni, and Mo, respectively, classify the area as “highly polluted” for most metals. These findings highlight the significant anthropogenic contribution to heavy metal accumulation, driven by vehicular emissions, tire wear, and industrial activities. The contamination poses risks to soil health, biodiversity, and human safety through bioaccumulation in the food chain. Sustainable environmental management and pollution mitigation strategies are urgently required to address these concerns and safeguard agricultural productivity and ecosystem functions.

Słowa kluczowe

contamination heavy metal pollution road soil Uzbekistan

Wydawca

Polskie Towarzystwo Inżynierii Ekologicznej
Lublin University of Technology

Czasopismo

Journal of Ecological Engineering

Rocznik

2025

Tom

Vol. 26, nr 3

Strony

283--295

Opis fizyczny

Bibliogr. 55 poz., rys., tab.

Twórcy

autor

Kholikulov Shodi Turdukulovich

Department of Soil Science and Agricultural Technologies, Samarkand State University, Samarkand, Uzbekistan

https://orcid.org/0000-0002-0736-0979

autor

Erdem Halil

erdemh@hotmail.com

Department of Soil Science and Plant Nutrition, Faculty of Agriculture, Tokat Gaziosmanpasa University, Tokat, Türkiye

https://orcid.org/0000-0002-3296-1549

autor

Bobobekov Isomiddin Nuriddinovich

Department of Soil Science and Agricultural Technologies, Samarkand State University, Samarkand, Uzbekistan

https://orcid.org/0009-0008-5550-6216

autor

Demir Saniye

Department of Soil Science and Plant Nutrition, Faculty of Agriculture, Tokat Gaziosmanpasa University, Tokat, Türkiye

https://orcid.org/0000-0003-3908-7070

autor

Gence Cabir Çağrı

Department of Plantal and Animal Production, Aksaray Technical Sciences Vocational School, Aksaray University, Aksaray, Türkiye

https://orcid.org/0000-0001-9748-1303

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