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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/15000

Title: Distribution and ecological risks of toxic metals in the topsoils in the Kumasi metropolis, Ghana
Authors: Darko, Godfred
Dodd, Matt
Nkansah, Marian Asantewah
Aduse-Poku, Yaw
Ansah, Eugene
Wemegah, David Dotse
Borquaye, Lawrence Sheringham
Keywords: soil contamination
urban soil
toxic heavy metals
Issue Date: Jul-2017
Publisher: Cogent Environmental Science
Citation: Cogent Environmental Science
Abstract: The distribution, and ecological risks due to toxic metals in topsoils of an urban commercial centre of Kumasi metropolis were determined. Concentrations of heavy metals in the samples were initially screened using field portable X-ray fluorescence spectrometer prior to confirmation on an inductively coupled plasmamass spectrometer. The results from the two instruments correlated well with high linearity (R2 > 0.70). Concentrations of metals were in the order: Fe (45246.15 mg/ kg) > Mn (347.86 mg/kg) > Zn (176.40 mg/kg) > V (173.10 mg/kg) > Cr (125.12 mg/ kg) > Pb (53.47 mg/kg) > Ni (43.16 mg/kg) > Cu (39.85 mg/kg) > As (4.59 mg/ kg) > Sn (3.69 mg/kg) > Cd (0.46 mg/kg) > Hg (0.28 mg/kg). Multivariate and geostatistical analyses exploring various hazard indices such as geo-accumulation, contamination, pollution load and ecological risks all suggest contamination of the topsoils with toxic metals and that the contamination due to Pb, Cu, Ni, Cr and Zn is mainly derived from anthropogenic origins whereas, As, Hg, Mn, V, Sn and Cd contaminations are attributable mainly to geological and atmospheric depositions
Description: This article is published by Cogent Environmental Science and is also available at https://doi.org/10.1080/23311843.2017.1354965
URI: 10.1080/23311843.2017.1354965
Appears in Collections:College of Science

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