Ecological Risk assesment of pontentially toxic metals in soils around used automobile parts and mechanic workshops in lagos state, Nigeria
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Date
2017-04
Authors
Menkiti, N. D.
Oyeyiola, A. O.
Olayinka, K. O.
Journal Title
Journal ISSN
Volume Title
Publisher
ftstjournal
Abstract
Soil samples from 12 major automobile spare parts sales and car dismantling sites in Lagos and a control sample
were analysed for selected potentially toxic metals (PTM): Cd, Cr, Cu, Ni, Pb and Zn. The soil samples were
digested with aqua regia and analysed using a flame atomic absorption spectrophotometer. The concentrations
(mg/kg) of Cd, Cu, Cr, Ni, Pb, and Zn in the soil samples ranged from 2.73- 19.2, 7.12- 113, 1.3- 77.7, 2.74- 17.7,
0.73- 68.3 and 40.4- 254, respectively. Compared with established limits set for soils in some countries, the values
measured in this study were higher than these limits in several cases. Principal component analysis (PCA) was
used to examine relationship between the sets of data and two major components were extracted. PC1 had a high
loading of Ni, Cr and pH thus suggested to be the result of the contamination from battery charger shop close to the
site where the samples were collected, while PC2 had a high loading of Zn, Cd and Cu probably also suggesting
anthropogenic influence. The Hakanson ecological risk index revealed that the degree of metals pollution was
greatly influenced by Cd and the other metals in the order: (Cd) > (Zn) > (Cu) > (Pb) > (Cr) > (Ni).
Description
Staff Publications
Keywords
Ecological risk assessment , mechanic workshops , potentially toxic metals , flame atomic absorption spectrophotometer , Principal component analysis (PCA) , Research Subject Categories::NATURAL SCIENCES::Chemistry::Analytical chemistry::Separation methods
Citation
Menkiti, N. D., Oyeyiola, A. O., & Olayinka, K. O. (2017). Ecological Risk assesment of pontentially toxic metals in soils around used automobile parts and mechanic workshops in lagos state, Nigeria.