Biological Detoxification of Nickel-Cyanide from Industrial Effluents
Patil YB and Paknikar KM (2001) Biological detoxification of nickel-cyanide from industrial effluents. Process Metallurgy 11: 391-400 (Elsevier Science; Scopus; ISSN: 1572-4409)
9 Pages Posted: 17 Nov 2014
Date Written: November 15, 2014
A bacterial consortium capable of utilising metal-cyanides as sources I)f nitrogen was used to develop a microbiological process for the detoxification of nickel-cyanide from waste water. Optimal conditions for biodegradation of nickel-cyanide was pH 7.5, temperature 35°C, inoculum size 109 cells/ml and glucose or sugarcane(~ molasses concentration of 5 mM or 0.6 mlll, respectively. Metal precipitate obtained during nickel-cyanide biodegradation was identified as nickel hydroxide. The identity of this product was confirmed by using Bulk X-Ray Diffraction (XRD) measurements. The laboratory scale microbiological degradation carried out in 5 Icontinuous stirred tank reactor (CSTR) showed that the bacterial consortium could degrade 0.5 mM nickel-cyanide (,,52 mg/l cyanide) with >99.9% efficiency using sugarcane molasses as carbon source.
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