Heavy Metal Concentrations in Soil and Green Vegetables (Vigna unguiculata) around Volcanic Mountain of Oldoinyo Lengai, Arusha, Tanzania
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Date
2015
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Publisher
SCIENCEDOMAIN international
Abstract
The aim of this work was to assess heavy metal concentrations of samples collected from areas
around a volcanic mountain in Tanzania. Fifty five soil samples and 10 samples of bean leaves
were analysed using Energy Dispersive X- ray Fluorescence spectrometry (EDXRF). The
concentrations of heavy metals in the samples are presented, statistical analysed and compared
with control. The concentration in bean leaves are also compared with the maximum tolerable limits
set by FAO/WHO to assess their safety for consumption. The results from this study show that high
concentration of elements in both soils and bean leaves samples from Oldoinyo Lengai areas might
be associated with frequently eruptions of the volcanic mountain of Oldoinyo Lengai. Hence,
farming in Oldoinyo Lengai areas is introducing heavy metals in the food chain.
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Keywords
Heavy metal, volcanic mountain, Oldoinyo Lengai, EDXRF, soil, bean leaves
Citation
DOI: 10.9734/AJEA/2015/16991