Performance of Fusarium oxysporum EKT01/02 isolate in cyanide biodegradation system

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.

Performance of Various Cyanide Degrading Bacteria on the Biodegradation of Free Cyanide

“…Biodegradation of the FCN leads to NH 4 + formation as reported by various previous studies on FCN biodegradation [24][25]. The formation of NH 4 + reveals a FCN biodegradation by hydrolytic pathway [5].…”

“…These gums represents the nutrient and FCN uptake in the biomass [5]. Biofilm biomass embedded in these pollutants could affect the topographic surface of the biomass [5]. Therefore, C t embedded highest FCN concentration than Cm and C 2 .…”

“…Effluents containing FCN should be treated before they are realised into the environment to avoid detrimental effects on the environment medium, such as the contamination of fresh water sources and soil pollution [3],which would culminate in deleterious human health outcomes such as: metabolic acidosis, coma, seizures, bradycardia, and lack of response to oxygen treatment [4]. Physical, chemical and biological treatments are the different treatment methods available for FCN [5]. Nevertheless, biological methods are the most applied as the technology is inexpensive and due to the absence of hazards by-products from the process, as seen in most other treatment methods [6].…”

Performance of various cyanide degrading bacteria on the biodegradation of free cyanide in water

“…Physical, chemical and biological treatments are the different treatment methods available for FCN removal from wastewater [5]. Nevertheless, biological methods are the most applied since this technology is inexpensive and does not contribute to hazardous by-products accumulation, which are witnessed in other treatment methods [6].…”

A kinetic study of 4-chlorophenol biodegradation by the novel isolated Bacillus subtilis in batch shake flask

“…However, the accumulation of toxic intermediate products along with low elimination competence of 4-CP are outstanding bottleneck issues of the existing traditional treatment strategies. On the contrary, biological treatment is advantageous than conventional treatment processes [10], owing to its high removal efficiency and the absence of the formation of toxic intermediates [11]. Therefore, inexpensive, eco-friendly biodegradation processes are desirable [12].…”