Trace metals in soil and leaves of Jacaranda mimosifolia in Tshwane area,South Africa |
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| Authors: | JO Olowoyo E van Heerden JL Fischer C Baker |
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| Institution: | 1. Department of Chemistry, Durban University of Technology, P.O. Box 1334, Durban 4000, South Africa;2. SARChi Chair, Institute for Water and Wastewater Technology, Durban University of Technology, P.O. Box 1334, Durban 4000, South Africa;1. Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom 2520, South Africa;2. Department of Botany & Zoology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa;1. Unit for Environmental Sciences and Management, North-West University, Private Bag X6001, Potchefstroom 2520, South Africa;2. Biological Sciences Department, California Polytechnic State University, San Luis Obispo, CA 93407, United States |
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| Abstract: | Plant and soil have been identified as major sink of pollutants in the environment. We evaluated the reliability of biomonitoring of heavy metals in Tshwane area with the use of leaves of Jacaranda mimosifolia. The concentrations of heavy metals such as Ca, Mg, Fe, Pb, Zn, Cu, Sb were measured in leaves of J. mimosifolia and soils collected from 10 sites in the city of Tshwane during two sampling periods. The metals were analyzed with the use of ICP-MS. The result shows significant differences in the concentration of trace metals in all the sites (p < 0.01). The differences between the two sampling periods were statistically significant (p < 0.01). Concentration of metals from high traffic and industrial sites were significantly higher than in the residential areas (p < 0.01). Concentration factor suggests that translocation of metals from roots to leaves could be relevant only for some metals such as Ca, Mg and Sb. The study reveals an anthropogenic source for the trace metals. Leaves of J. mimosifolia were found to be a useful biomonitor of the determined trace metals. |
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