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Study on wet air oxidation of aqueous ferrous cyanide solution catalyzed by three metal salts.
- Source :
-
Water Science & Technology . 2000, Vol. 42 Issue 3/4, p131-136. 6p. - Publication Year :
- 2000
-
Abstract
- The catalytic wet oxidation (CWO) process with Cu2+, Mn2+, and Ce2+ as catalysts, respectively, was applied to investigate the degradation of ferrocyanide (Fe(CN)64-) solution. For the conversions of Fe(CN)64 during the noncatalytic wet oxidation (WO) process up to 99.9 % was attained after a reaction time of 70 min. The COD removal efficiency was observed as only 38% in a noncatalytic oxidation; however, it could be enhanced to 75%, 61%, and 50% in the presence of Cu2+, Mn2+, and Ce2+, respectively. Both noncatalytic and catalytic wet oxidation processes of Fe(CN)64- solution were considered to be a two-step reaction at pH 9.0 and temperatures of 433-473 K. The oxidation rate was initially fast, followed by a slow step, which did obey first-order kinetics with respect to chemical oxygen demand (COD). Both the Cu2+ and Ce2+ catalyzed oxidation showed a significant effect on the reduction of activation energy during the first reaction of the WO runs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02731223
- Volume :
- 42
- Issue :
- 3/4
- Database :
- Academic Search Index
- Journal :
- Water Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 26878077
- Full Text :
- https://doi.org/10.2166/wst.2000.0369