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Ferrate(VI): a green chemical for the oxidation of cyanide in aqueous/waste solutions.

Abstract

The higher oxidation state of iron, i.e. Fe(VI), was employed for the oxidation of the important toxic ion cyanide in aqueous/waste waters. Cyanide was oxidized to cyanate, which is 1,000 times less toxic than cyanide, and can often be accepted for its ultimate disposal. It was noted that Fe(VI) is a very powerful oxidizing agent, and can oxidize most of the cyanide within a few minutes, ca 5 minutes, of contact. The extent of the reduction of Fe(VI) was obtained using the UV-Visible measurements. Further, the UV-Visible data was used to explain the reaction kinetics involved in the redox reaction between ferrate(VI) and cyanide. The pseudo-first-order rate constant was calculated by maintaining the cyanide concentration in excess, with the overall second order rate constant values obtained for initial Fe(VI) concentrations of 1.0 and 0.1 mmol/L. The oxidation of cyanide was again confirmed using a cyanide probe. Fe(VI) was further employed for its possible application in the treatment of industrial wastewaters containing cyanide, along with some heavy metals, such as those obtained from electroplating industries.

Authors+Show Affiliations

Department of Environmental Engineering, Kwandong University, Gangnung, Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17474007

Citation

Tiwari, Diwakar, et al. "Ferrate(VI): a Green Chemical for the Oxidation of Cyanide in Aqueous/waste Solutions." Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering, vol. 42, no. 6, 2007, pp. 803-10.
Tiwari D, Kim HU, Choi BJ, et al. Ferrate(VI): a green chemical for the oxidation of cyanide in aqueous/waste solutions. J Environ Sci Health A Tox Hazard Subst Environ Eng. 2007;42(6):803-10.
Tiwari, D., Kim, H. U., Choi, B. J., Lee, S. M., Kwon, O. H., Choi, K. M., & Yang, J. K. (2007). Ferrate(VI): a green chemical for the oxidation of cyanide in aqueous/waste solutions. Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering, 42(6), 803-10.
Tiwari D, et al. Ferrate(VI): a Green Chemical for the Oxidation of Cyanide in Aqueous/waste Solutions. J Environ Sci Health A Tox Hazard Subst Environ Eng. 2007;42(6):803-10. PubMed PMID: 17474007.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ferrate(VI): a green chemical for the oxidation of cyanide in aqueous/waste solutions. AU - Tiwari,Diwakar, AU - Kim,Hyoung-Uk, AU - Choi,Bong-Jong, AU - Lee,Seung-Mok, AU - Kwon,Oh-Heung, AU - Choi,Kyu-Man, AU - Yang,Jae-Kyu, PY - 2007/5/3/pubmed PY - 2007/7/18/medline PY - 2007/5/3/entrez SP - 803 EP - 10 JF - Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering JO - J Environ Sci Health A Tox Hazard Subst Environ Eng VL - 42 IS - 6 N2 - The higher oxidation state of iron, i.e. Fe(VI), was employed for the oxidation of the important toxic ion cyanide in aqueous/waste waters. Cyanide was oxidized to cyanate, which is 1,000 times less toxic than cyanide, and can often be accepted for its ultimate disposal. It was noted that Fe(VI) is a very powerful oxidizing agent, and can oxidize most of the cyanide within a few minutes, ca 5 minutes, of contact. The extent of the reduction of Fe(VI) was obtained using the UV-Visible measurements. Further, the UV-Visible data was used to explain the reaction kinetics involved in the redox reaction between ferrate(VI) and cyanide. The pseudo-first-order rate constant was calculated by maintaining the cyanide concentration in excess, with the overall second order rate constant values obtained for initial Fe(VI) concentrations of 1.0 and 0.1 mmol/L. The oxidation of cyanide was again confirmed using a cyanide probe. Fe(VI) was further employed for its possible application in the treatment of industrial wastewaters containing cyanide, along with some heavy metals, such as those obtained from electroplating industries. SN - 1093-4529 UR - https://www.unboundmedicine.com/medline/citation/17474007/Ferrate_VI_:_a_green_chemical_for_the_oxidation_of_cyanide_in_aqueous/waste_solutions_ L2 - https://www.tandfonline.com/doi/full/10.1080/10934520701304674 DB - PRIME DP - Unbound Medicine ER -