Elsevier

Pedosphere

Volume 29, Issue 5, October 2019, Pages 665-675
Pedosphere

Sources and Ecological Risks of Heavy Metals in Soils Under Different Land Uses in Bangladesh

https://doi.org/10.1016/S1002-0160(17)60394-1Get rights and content

Abstract

Soil heavy metal pollution, influenced by both natural and anthropogenic factors, significantly reduces environmental quality. In this study, Cr, Ni, Cu, As, Cd, and Pb in eight different land-use soils from Patuakhali District in Bangladesh were assessed. Concentrations of Cr, Ni, Cu, As, Cd, and Pb in soils were 1–87, 5–271, 4–181, 0–80, 0.2–24.0, and 5–276 mg kg1, respectively, measured using an inductively coupled plasma-mass spectrometer. The enrichment factor, pollution load index (PLI), and contamination factor (Cif) of metal i were used to assess the ecological risk posed by metals in soils. The PLI ranged from 0.78 to 2.66, indicating baseline levels to progressive deterioration of soil due to metal contamination. However, Cif of Cd ranged from 1.8 to 12.0, which showed that the studied soils were strongly impacted by Cd. Considering the severity of the potential ecological risk of a single metal, the descending order was Cd > As > Pb > Cu > Ni > Cr. Soils under all land uses showed moderate to very high potential ecological risk.

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