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Ferrate(VI) oxidation of cyanide in water.
Environ Technol. 2004 Aug; 25(8):945-55.ET

Abstract

Experiments were conducted to test removal of cyanide (free cyanide and several cyanide complexes) in water, under alkaline medium (pH > or = 11), by a new potassium ferrate salt. The removal rate of free cyanide by oxidation with Fe(VI) was greater at pH 11.0 than at pH 12.0. A complete oxidation was obtained with a 2.67 Fe(VI)/CN ratio at pH 11.0. In these conditions, the rate of cyanide oxidation by Fe(VI) was slow, with a reaction rate constant estimated at 0.95 +/- 0.10 s(-1) l mol(-1) at pH 11.0 and 19.6 degrees C in this study. This study revealed that Fe(VI) did not decompose all cyanide complexes. Copper, cadmium and zinc complexes were removed efficiently by Fe(VI). Moreover, these metals were also removed from the solution by coagulation effect of Fe(OH)3, the Fe(VI) product of reaction. A particular behaviour was reported with copper, as a rapid oxidation of cyanide was observed in the presence of this metal. On the contrary, oxidation of nickel and silver complexes was incomplete.

Authors+Show Affiliations

STRADIA--9 Le Pré d'Alliot--40390 St Martin de Seignanx France.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

15366562

Citation

Costarramone, N, et al. "Ferrate(VI) Oxidation of Cyanide in Water." Environmental Technology, vol. 25, no. 8, 2004, pp. 945-55.
Costarramone N, Kneip A, Castetbon A. Ferrate(VI) oxidation of cyanide in water. Environ Technol. 2004;25(8):945-55.
Costarramone, N., Kneip, A., & Castetbon, A. (2004). Ferrate(VI) oxidation of cyanide in water. Environmental Technology, 25(8), 945-55.
Costarramone N, Kneip A, Castetbon A. Ferrate(VI) Oxidation of Cyanide in Water. Environ Technol. 2004;25(8):945-55. PubMed PMID: 15366562.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ferrate(VI) oxidation of cyanide in water. AU - Costarramone,N, AU - Kneip,A, AU - Castetbon,A, PY - 2004/9/16/pubmed PY - 2004/11/13/medline PY - 2004/9/16/entrez SP - 945 EP - 55 JF - Environmental technology JO - Environ Technol VL - 25 IS - 8 N2 - Experiments were conducted to test removal of cyanide (free cyanide and several cyanide complexes) in water, under alkaline medium (pH > or = 11), by a new potassium ferrate salt. The removal rate of free cyanide by oxidation with Fe(VI) was greater at pH 11.0 than at pH 12.0. A complete oxidation was obtained with a 2.67 Fe(VI)/CN ratio at pH 11.0. In these conditions, the rate of cyanide oxidation by Fe(VI) was slow, with a reaction rate constant estimated at 0.95 +/- 0.10 s(-1) l mol(-1) at pH 11.0 and 19.6 degrees C in this study. This study revealed that Fe(VI) did not decompose all cyanide complexes. Copper, cadmium and zinc complexes were removed efficiently by Fe(VI). Moreover, these metals were also removed from the solution by coagulation effect of Fe(OH)3, the Fe(VI) product of reaction. A particular behaviour was reported with copper, as a rapid oxidation of cyanide was observed in the presence of this metal. On the contrary, oxidation of nickel and silver complexes was incomplete. SN - 0959-3330 UR - https://www.unboundmedicine.com/medline/citation/15366562/Ferrate_VI__oxidation_of_cyanide_in_water_ L2 - https://www.tandfonline.com/doi/full/10.1080/09593330.2004.9619388 DB - PRIME DP - Unbound Medicine ER -