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  Sci. Res. Impact.  

  4(3): 031-042, June 2018


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Scientific Research and Impact, Vol. 4(3), pp 031-042 June 2018


(ISSN 2315-5396) 2018 Science Park Journals

Full Length Research Paper




Effect of soil pollution and addition of coal fly ash on germination of Jatropha curcas and Pennisetum clandestinum: An initial approach to phytoremediation of Bamangwato Concessions Ltd (BCL) Cu/Ni mine, Botswana.

Baleseng Moseki1 Raviro Vurayai , Bonang Nkoane, PadmajaChaturvedi.

University of Botswana, P/Bag UB00704, Gaborone, Botswana




Abstract: Mining and smelting at BCL-Cu/Ni mine in Selebi-Phikwe, Botswana has been reported to have resulted in soil acidity and heavy metal contamination. Phytoremediation can be used to rehabilitate such soils. Research has shown Jatropha curcas and Pennisetum clandestinumas promising phytoremediators. The present study was conducted on soil collected east and west of mine smelter to analyze effect of heavy metals and soil acidity on germination of Pennisetum clandestinum (Kikuyu) andtwo Jatropha accessions from Tsamaya (J09) and Mosetse (J05), Botswana. Coal fly ash from Morupule power station, Palapye, Botswana, was added to soil to also assess its effect on seed germination in contaminated soils. Germination percentage, coefficient rate of germination, shoot length, root length, shoot dry weight, root dry weight, root: shootratio, vigour index and tolerance index of  both species grown in soil without coal fly ash were reduced (p<0.05).Kikuyu failed to germinate in soil collected closest to the mine smelter (2.5 km west). Coal fly ash increased (p<0.05) the above mentioned parameters in both species and Kikuyu managed to germinate in soil with coal fly ash. The ability of Jatropha carcas species to germinate in polluted soil indicates tolerance to heavy metal stress and soil acidity unlike Kikuyu.

Keywords: Heavy metals; soil acidity; phytoremediation; coal fly ash; germination







This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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