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Biological Treatment of Cyanide by Using Klebsiella pneumoniae Species

Biological Treatment of Cyanide by Using Klebsiella pneumoniae Species

Nermin Hande Avcioglu, Isil Seyis Bilkay

Food Technol Biotechnol. 2016 Dec;54(4):450-454.

PMID: 28115902

Abstract:

In this study, optimization conditions for cyanide biodegradation by Klebsiella pneumoniae strain were determined to be 25 °C, pH=7 and 150 rpm at the concentration of 0.5 mM potassium cyanide in the medium. Additionally, it was found that K. pneumoniae strain is not only able to degrade potassium cyanide, but also to degrade potassium hexacyanoferrate(II) trihydrate and sodium ferrocyanide decahydrate with the efficiencies of 85 and 87.5%, respectively. Furthermore, this strain degraded potassium cyanide in the presence of different ions such as magnesium, nickel, cobalt, iron, chromium, arsenic and zinc, in variable concentrations (0.1, 0.25 and 0.5 mM) and as a result the amount of the bacteria in the biodegradation media decreased with the increase of ion concentration. Lastly, it was also observed that sterile crude extract of K. pneumoniae strain degraded potassium cyanide on the fifth day of incubation. Based on these results, it is concluded that both culture and sterile crude extract of K. pnemoniae will be used in cyanide removal from different wastes.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP14459951	Potassium hexacyanoferrate(II) trihydrate		14459-95-1	Price

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