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Trends in Applied Sciences Research
  Year: 2011 | Volume: 6 | Issue: 7 | Page No.: 640-655
DOI: 10.3923/tasr.2011.640.655
 
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Profile of Major, Minor and Toxic Metals in Soil and Khat (Catha edulis Forsk) Cultivars in Ethiopia
Minaleshewa Atlabachew, Bhagwan Singh Chandravanshi and Mesfin Redi

Abstract:
Thirteen khat (Catha edulis Forsk) varieties grown in different regional farms of Ethiopia and the respective soils were analyzed for their contents of major, minor and toxic metals (Ca, Mg, Fe, Mn, Cu, Zn, Co, Ni, Cd and Pb) by flame atomic absorption spectrometry. Both the edible portion of khat leaves and the soils of the study farms showed similar accumulation patterns in their contents of the studied macro and micronutrients. Among the macronutrient metals, Ca was the most abundant element in the khat leaves (1.03-2.03 mg g-1) followed by Mg (0.441-0.802 mg g-1) on fresh weight basis. Fe was the predominant micronutrient heavy metal in the edible portion of khat leaves ranging between 37.2 and 90.3 mg kg-1 on fresh weight basis. Level of Zn (5.10-10.6 mg kg-1 on fresh weight basis) in the leaf tissue was found to be the second most abundant micronutrient next to Fe whereas concentrations of Mn, Ni, Cu and Co were relatively lower in khat samples. The toxic heavy metals Pb and Cd in the leaf tissues were present at levels too low to be detected by the analytical technique used in this study. The soils were found to be between weakly acidic to weakly basic (pH 5.28-7.34). Fe was the most abundant metal followed by Mg, Ca, Mn, Zn, Co, Ni and Cu, in the soils. Unlike the khat leaves, the soils were found to contain traces of the toxic metal, Cd (0.73-1.23 mg kg-1). The levels of most of the metals determined in this study compared well with previous reports.
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How to cite this article:

Minaleshewa Atlabachew, Bhagwan Singh Chandravanshi and Mesfin Redi, 2011. Profile of Major, Minor and Toxic Metals in Soil and Khat (Catha edulis Forsk) Cultivars in Ethiopia. Trends in Applied Sciences Research, 6: 640-655.

DOI: 10.3923/tasr.2011.640.655

URL: https://scialert.net/abstract/?doi=tasr.2011.640.655

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