с 01.01.2019 по 01.01.2023
Souk-Ahras, Алжир
Россия
Алжир
УДК 55 Геология. Геологические и геофизические науки
УДК 550.34 Сейсмология
УДК 550.383 Главное магнитное поле Земли
ГРНТИ 31.00 ХИМИЯ
ГРНТИ 31.19 Аналитическая химия
ГРНТИ 37.01 Общие вопросы геофизики
ГРНТИ 37.15 Геомагнетизм и высокие слои атмосферы
ГРНТИ 37.25 Океанология
ГРНТИ 37.31 Физика Земли
ГРНТИ 38.01 Общие вопросы геологии
ГРНТИ 36.00 ГЕОДЕЗИЯ. КАРТОГРАФИЯ
ГРНТИ 37.00 ГЕОФИЗИКА
ГРНТИ 38.00 ГЕОЛОГИЯ
ГРНТИ 39.00 ГЕОГРАФИЯ
ГРНТИ 52.00 ГОРНОЕ ДЕЛО
ОКСО 04.00.00 Химия
ОКСО 05.03.06 Экология и природопользование
ОКСО 05.00.00 Науки о Земле
ББК 26 Науки о Земле
ТБК 63 Науки о Земле. Экология
BISAC SCI SCIENCE
This study aimed to assess the contamination of sediments in Wadi Djedra and its tributaries by seven trace elements. The average concentrations of Mn, Pb, Zn, Cu, Ni, Cd, and Cr in the sediments ranged from 31.4 to 59.2, 1.2 to 18.4, 15.1 to 54.7, 11.2 to 19.7, 1.1 to 14.7, 0.1 to 0.3, and 0.1 to 4.3 mg/kg, respectively. Sediment contamination was evaluated using the enrichment factor (EF), geoaccumulation index (Igeo), and potential ecological risk index (Eri). The Igeo values for Cd indicated moderate contamination at sites S2, S4, S5, and S7, while for other sites and elements, the values were negative, indicating no contamination. The results revealed very high enrichment of Cd and Cu in the analyzed sediments, attributed to human activities. In contrast, chromium and manganese concentrations were comparable to those observed in the Earth's crust. Suggesting even a depletion of metals in the sediments (EF < 2). The Eri index measurements showed that the sediments in the Djedra basin exhibited moderate to high pollution levels for Cd at most study sites. Lithogenic sources, urban discharges, and agricultural activities were the main factors affecting the concentrations of Cd, Cu, Zn, and Pb in the studied sediments. Although the current contamination is not alarming in the short term, it should be considered in future monitoring and management efforts.
Djedra watershed, pollution, trace metals, sediments, ecological risks
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