"/> '' '' '' ''

Abstract                 Volume:3  Issue-12  Year-2016          Original Research Articles

IJCRBP is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCRBP Articles.

Online ISSN : 2349-8080
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorinchiefijcrbp@gmail.com

Heavy Metal Concentrations in Some Common Medicinal Plants from Different Geographical Locations in Douala, Cameroon
Maffo Maffo Nicole Liliane1,2*, Zapfack Louis1, Youmbi Emmanuel2, Dibong Siegfried Didier3, Ntsomboh-Ntsefong Godswill2,4 and Nanfack Arsel DEstaing1
1Department of Plant Biology. Laboratory of Botany & Ecology: Research Unit: Ecology/Systematics and Assessment of Carbon Stocks. Faculty of Science, P. O. Box: 812, University of Yaounde I, Cameroon
2Department of Plant Biology. Laboratory of Biotechnology & Environment. Faculty of Science, P. O. Box: 812, University of Yaounde I, Cameroon
3Laboratory of Plant Ecology, Department of Plant Organisms and Physiology, Faculty of Science, P. O. Box 24157, University of  Douala, Cameroon
4Institute of Agricultural Research for Development, CEREPAH Dibamba, P. O. Box 243 Douala, Cameroon
*Corresponding author

This study was aimed at investigating and comparing the levels of five heavy metals;        Pb, Cd, Cr, Zn, and Cu in both leaves, shoot and root samples of six common medicinal plants: Aloe vera, Ageratum conyzoides, Cleome ciliata, Cymbopogon citratus, Eremomastax speciosa, and Justicia secunda collected from refuse dumps, roadsides and residential areas in Douala. The plant samples collected were divided into different parts. Concentrations of heavy metals were determined using Atomic Absorption Spectrometry. Results revealed that the selected medicinal plants accumulate heavy metals at different concentrations. Heavy metals repartition decreased in the trend roots>shoots>leaves. There was a significant difference (p<0.0001) in the content of metals between plants from different collection points. Samples collected from refuse dumps showed significantly higher concentrations (p<0.0001) of heavy metals followed by roadsides, then residential areas. Comparison of results with defined permissible limits led to the conclusion that the levels of all five heavy metals were beyond the permissible limits in the majority of medicinal plants analyzed. Only Ageratum conyzoides was below the permissible limit for Cu. High heavy metal concentrations in plants indicate high level of contamination and this raises consumers’ health risk concerns.

Keywords: Atomic absorption spectrometry,Heavy metals,Medicinal plants,Health risk
Download this article as Download

How to cite this article:

Maffo Maffo, N. L., Zapfack, L., Youmbi, E., Dibong, S. D., Ntsomboh-Ntsefong, G., Nanfack, A. D’E., 2016. Heavy metal concentrations in some common medicinal plants from different geographical locations in Douala, Cameroon.Int.J.Curr.Res.Biosci.Plantbiol. 3(12): 10-23. doi: http://dx.doi.org/10.20546/ijcrbp.2016.312.002
Copyright: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.