Potential interferences in catalysis of the unsteady-state reaeration technique
Date of Original Version
An investigation was conducted on the effects of certain water quality parameters on the catalytic action of cobalt used in conjuction with sodium sulfite for deaeration prior to aerator performance testing. The water quality parameters included were chlorine, pH, and ammonia, along with combinations of these parameters. Without sufficient levels of dissolved cobalt, erroneous mass transfer values would be measured due to the effect of sulfite during the uptake portion of the reaeration test. A 7-L reactor with a diffused air source was constructed for the unsteady-state reaeration tests. High pH values were found to cause cobalt precipitation from solution. Chloramines were found to reduce the effective catalytic properties of the cobalt even though the required concentrations of cobalt remained constant in solution.
Journal of the Water Pollution Control Federation
Terry, D. W., and L. T. Thiem. "Potential interferences in catalysis of the unsteady-state reaeration technique." Journal of the Water Pollution Control Federation 61, 8 (1989): 1464-1470. https://digitalcommons.uri.edu/cve_facpubs/369