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Title 

Toxicity and degradation of metal-complexed cyanide by a bacterial consortium under sulfate-reducing conditions

Authors 

Z X QuanJin-Woo BaeSung-Keun RheeYong Gyun ChoS T Lee

Publisher 

Springer Verlag (Germany)

Issue Date 

2004

Citation 

Biotechnology Letters, vol. 26, no. 12, pp. 1007-1011

Keywords 

cyanidemetalsulfateanaerobic bacteriumbioremediationcell survivalcomparative studyisolation and purificationmetabolismoxidation reduction reaction

Abstract 

Free cyanide at 1 mm decreased the initial sulfate reduction rate of a batch culture of granular sludge from 0.3 to 0.14 mmol d(-1) g(-1) SS (suspended solid), whereas 0.5 mm cyanide had a minimal effect (0.25 mmol d(-1) g(-1) SS). The order of toxicity of metal-complexed cyanides to the sludge was as follows: zinc-complexed cyanide (most toxic) > free cyanide = nickel-complexed cyanide > copper-complexed cyanide (least toxic), which also corresponds well with the order of the stability (dissociation) constants of the metal-cyanide complexes. A consortium degrading cyanide was enriched using nickel cyanide as the sole nitrogen source. This consortium completely removed 0.5 mm of nickel-complexed cyanide under sulfate-reducing conditions in 11 d. Analysis of clone library of 16S rRNA genes shows that the consortium was composed of three major phylotypes including Desulfovibrio.

ISSN 

0141-5492

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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