Document Type
Article
Source of Publication
Frontiers in Environmental Science
Publication Date
4-18-2023
Abstract
The metal composition of road-deposited dust along the Abu Dhabi-Liwa Highway was investigated to provide insight into the contamination profile and levels of road dust. The average concentrations of metals decreased in the order Al (28668 ± 4631 mg/kg)> Fe (21461 ± 2594 mg/kg) > Mn (711.8 ± 76.3 mg/kg) > Zn (210.6 ± 51.6 mg/kg) > Cu (94.9 ± 15.8 mg/kg) > Pb (83.6 ± 5.3 mg/kg) > Cd (75.1 ± 1.6 mg/kg) > Co (62.6 ± 6.4 mg/kg) > As (4.7 ± 2.9 mg/kg) > Ni (0.10 ± 0.19 mg/kg) > Cr (0.08 ± 0.06 mg/kg). The spatial variations of metals suggest different sources and contributing factors for these metals, with most dust metals having mixed traffic and non-traffic origins. The contamination factor (CF) and enrichment factor (EF) showed identically the same order, Cd> Pb> As> Zn> Co> Cu> Mn> Ni> Cr, whereas the geoaccumulation index (Igeo) follows a slightly different ranking, Cd> Pb> Zn> Co> As> Cu> Mn> Ni> Cr. Based on EF and CF levels, roadway dusts are enriched in all metals, except for Ni and Cr. Similarly, the average Igeo values show differing rates of pollution for all metals except for Mn, Ni, and Cr. All pollution indicators suggest extreme pollution with Cd. The pollution loading index values showed sites 1–10 are generally polluted, while sampling sites from 11 to 19 are unpolluted with decreasing pollution loadings. Dusts collected from both sides of highway were higher in metal content than those obtained from the central reservation area. This may be due to the prevailing southeast wind direction, resuspension of road dust, and farmlands, among others. Soils bordering the highway showed high metal contents with potential consequences on the agricultural products.
DOI Link
ISSN
Publisher
Frontiers Media SA
Volume
11
First Page
1157101
Last Page
1157101
Disciplines
Environmental Health
Keywords
metals, dust, highway, Abu Dhabi, pollution indicators
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Al-Taani, Ahmed A.; Nazzal, Yousef; Howari, Fares M.; Iqbal, Jibran; Naseem, Muhammad; Sharma, Manish; Xavier, Cijo; Papandreou, Dimitrios; Maloukh, Lina; Ambika, Lakshmi; Salem, Imen Ben; Bsoul, Abeer Al; and Farok, Haitham M., "Metal composition and contamination assessment of urban roadway dusts on the Abu Dhabi-Liwa Highway, UAE" (2023). All Works. 5797.
https://zuscholars.zu.ac.ae/works/5797
Indexed in Scopus
no
Open Access
yes
Open Access Type
Gold: This publication is openly available in an open access journal/series