Table 6.

Biodegradation of cyanide by fungi, bacteria and enzyme-based catalysts.

	Microorganism/Enzyme	CN− conc. (mg/L)	Temperature (°C)	pH	Cyanide removal	References
1	Bacillus pumilus C1		37	7.8–8a		Meyers et al. (1993)
2	Trichoderma spp.	40	25	8	-	Ezzi and Lynch (2002)
3	Arthrospira maxima	50–100	N/Ab	N/Ab	inhibited	Gurbuz et al. (2004)
4	Chlorella sp.		N/Ab	N/Ab	86%
5	Scenedesmus obliquus		30	10	99%
6	Pseudomonas putida	100	25a	7.5a	20%–94%	Chapatwala et al. (1998)
7	Klebsiella oxytoca	26–156	30	7	12–91	Chen et al. (2008)

^aOptimal.

^bNot applicable (not investigated).