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Catalytic autooxidation of hydrogen sulfide in wastewater

Journal Article · · Environmental Science and Technology; (United States)
DOI:https://doi.org/10.1021/es00018a021· OSTI ID:5135943
;  [1]
  1. California Inst. of Tech., Pasadena (United States)
The catalytic effectiveness of cobalt (II)-4,4{prime},4{double prime},4{prime}{prime}{prime}-tetrasulfophthalocyanine (Co{sup II}TSP) for the autooxidation of hydrogen sulfide, S(-II), in wastewater was investigated. At pH 7 and 25C the rate of S(-II) oxidation is first order with respect to (S(-II)). A fractional order on the catalyst was observed. At oxygen concentrations of 15-200 {mu}M the oxygen dependence can be described by simple Michael-is-Menten kinetics with K = 65 {mu}M. The uncatalyzed oxidation of sulfide by molecular oxygen was found to be faster in wastewater than in clean water. This difference was attributed to microbial oxidation of S(-II) and to catalytic action of transition metals present in wastewater.
OSTI ID:
5135943
Journal Information:
Environmental Science and Technology; (United States), Journal Name: Environmental Science and Technology; (United States) Vol. 25:6; ISSN ESTHA; ISSN 0013-936X
Country of Publication:
United States
Language:
English

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