Pedosphere 29(5): 665--675, 2019
ISSN 1002-0160/CN 32-1315/P
©2019 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Sources and Ecological Risks of Heavy Metals in Soils Under Different Land Uses in Bangladesh
Mohammad Saiful ISLAM1,2, Mohammad Kawser AHMED3, Mohammad Habibullah AL-MAMUN2,4, Shah Mohammad Asraful ISLAM5
1Department of Soil Science, Patuakhali Science and Technology University, Dumki, Patuakhali 8602(Bangladesh)
2Environment and Information Sciences, Yokohama National University, Yokohama 240-8501(Japan)
3Department of Oceanography, University of Dhaka, Dhaka 1000(Bangladesh)
4Department of Fisheries, University of Dhaka, Dhaka 1000(Bangladesh)
5Department of Plant Pathology, Patuakhali Science and Technology University, Dumki, Patuakhali 8602(Bangladesh)
Corresponding Author:Mohammad Saiful ISLAM
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 kg-1, respectively, measured using an inductively coupled plasma-mass spectrometer. The enrichment factor, pollution load index (PLI), and contamination factor (Cfi) 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, Cfi 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.
Key Words:  Cd,contamination factor,degree of contamination,enrichment factor,environmental quality,pollution load index,soil deterioration,soil pollution
Citation: Islam M S, Ahmed M K, Al-Mamun M H, Islam S M A. 2019. Sources and ecological risks of heavy metals in soils under different land uses in Bangladesh. Pedosphere. 29(5): 665-675.
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