Please use this identifier to cite or link to this item: http://hdl.handle.net/11189/5714
Title: Biodegradation Kinetics of Free Cyanide in Fusarium oxysporum-Beta vulgaris Waste-metal (As, Cu, Fe, Pb, Zn) Cultures under Alkaline Conditions
Authors: Akinpelu, Enoch Akinbiyi 
Ntwampe, Seteno KO 
Mpongwana, Ncumisa 
Nchu, Felix 
Ojumu, Tunde 
Keywords: Beta Vulgaris;Biodegradation;Free cyanide;Fusarium oxysporum
Issue Date: 2016
Publisher: Bioresources
Abstract: The kinetics of free cyanide biodegradation were investigated under simulated winter (5 °C) and optimum conditions (22 °C and pH of 11) using a Fusarium oxysporum isolate grown on Beta vulgaris waste as a sole carbon source in the presence of heavy metals, i.e. As, Fe, Cu, Pb, and Zn. The highest free cyanide degradation efficiency was 77% and 51% at 22 °C and 5 °C respectively, in cultures containing free cyanide concentration of 100 mg F-CN/L. When compared with the simulated winter conditions (5 °C), the specific population growth rate increased 4-fold, 5-fold, and 6-fold in 100, 200 and 300 mg F-CN/L, respectively, for cultures incubated at 22 °C in comparison to cultures at 5 °C; an indication that the Fusarium oxysporum cyanide degrading isolate prefers a higher temperature for growth and cyanide biodegradation purposes. The estimated energy of activation for cellular respiration during cyanide degradation was 44.9, 54, and 63.5 kJ/mol for 100, 200, and 300 mg F-CN/L cultures, respectively, for the change in temperature from 5 to 22 °C.
URI: http://hdl.handle.net/11189/5714
ISSN: 2470-2482
Appears in Collections:Appsc - Journal Articles (DHET subsidised)

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