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DOI: https://doi.org/10.4491/eer.2017.154
Performance of Fusarium oxysporum EKT01/02 isolate in cyanide biodegradation system
Enoch Akinbiyi Akinpelu, Adewole Tomiwa Adetunji, Seteno Karabo Obed Ntwampe, Felix Nchu, and Lukhanyo Mekuto
Bioresource Engineering Research Group (BioERG), Cape Peninsula University of Technology, Keizersgracht and Tennant Street, Zonnebloem, P.O. Box 652, Cape Town, 8000, South Africa
Corresponding Author: Enoch Akinbiyi Akinpelu ,Tel: +27-21-400-9097 , Fax: +27-21-460-3282, Email: biyipelu@gmail.com
Received: October 23, 2017;  Accepted: February 6, 2018.
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ABSTRACT
This study reports a cyanide resistant and/or tolerant fungus, isolated from the rhizosphere of Zea mays contaminated with cyanide-based pesticides. The isolate was characterised using molecular biology. The effect of free cyanide and heavy metals on the growth of isolate in a synthetic gold mine wastewater was examined. The molecular analyses identified the isolate as Fusarium oxysporum EKT01/02 (KU985430/KU985431). The isolate had a free cyanide degradation efficiency of 77.6%. The results indicated greater growth impairment in culture containing Arsenic (optical density 1.28 and 1.458) and cyanide (optical density 1.315 and 1.385). Higher growth was observed in all cultures supplemented with extracellular polymeric substance. This study showed that the isolate possesses wide substrate utilisation mechanism that could be deployed in environmental engineering applications.
Keywords: Biodegradation | Cyanide | Fusarium oxysporum | ITS | TEF 1-α
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