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Contamination assessment of heavy metals in agricultural soil, in the liwa area (UAE)
Toxics
  • Ahmed A. Al-Taani, Zayed University
  • Yousef Nazzal, Zayed University
  • Fares M. Howari, Zayed University
  • Jibran Iqbal, Zayed University
  • Nadine Bou Orm, Zayed University
  • Cijo Madathil Xavier, Zayed University
  • Alina Bărbulescu, Universitatea Transilvania din Brasov
  • Manish Sharma, Zayed University
  • Cristian Stefan Dumitriu, Universitatea Transilvania din Brasov
Document Type
Article
Publication Date
3-1-2021
Abstract

The Liwa area is a primary food production area in the United Arab Emirates (UAE) and has intensively been used for agriculture. This study investigates the pollution levels with heavy metals in agricultural soils from the Liwa area. Thirty-two soil samples were analyzed for Mn, Zn, Cr, Ni, Cu, Pb, Cd, Co, and As. Results revealed that heavy metal levels varied in the ranges 220.02– 311.21, 42.39–66.92, 43.43–71.55, 32.86–52.12, 10.29–21.70, 2.83–8.84, 0.46–0.69, 0.03–0.37 mg/kg for Mn, Zn, Cr, Ni, Cu, Pb, Cd, Co, and As, respectively. All samples presented low As concentrations with an average of 0.01 mg/kg. The variations in bulk metal contents in the soil samples were related to multiple sources, including agrochemicals, atmospheric dust containing heavy metals, and traf-fic-related metals. Enrichment factor analysis indicates that Cd, Ni, Zn, and Cr were highly enriched in soils, and they could originate from non-crustal sources. Based on the geo-accumulation index (Igeo), the soil samples appeared uncontaminated with Mn, Cr, Zn, Pb, Co, As, Cu, uncontaminated to moderately contaminated with Ni and moderately contaminated with Cd. The contamination factors suggest low contamination, except for Ni, which showed moderate contamination. The average pollution load index (PLI) revealed unpolluted to low pollution of all soil samples. The ecological risk assessment (PERI) showed that all heavy metals posed a low risk, except for Cd which exhibited a high ecological risk.

Publisher
MDPI AG
Disciplines
Keywords
  • Abu Dhabi,
  • Agriculture,
  • Ecological risk assessment,
  • Heavy metals,
  • Liwa,
  • Pollution indices,
  • Soil,
  • UAE
Scopus ID

85102919545

Creative Commons License
Creative Commons Attribution 4.0 International
Indexed in Scopus
Yes
Open Access
Yes
Open Access Type
Gold: This publication is openly available in an open access journal/series
Citation Information
Ahmed A. Al-Taani, Yousef Nazzal, Fares M. Howari, Jibran Iqbal, et al.. "Contamination assessment of heavy metals in agricultural soil, in the liwa area (UAE)" Toxics Vol. 9 Iss. 3 (2021)
Available at: http://works.bepress.com/yousef-nazzal/8/