Abstract
The catalyst activities for Na2S oxidation in aqueous solution were examined for various materials such as activated carbon, carbon black, ferric salts, hydroquinone, 1,4-naphthoquinone-2-sulfonic acid sodium salt, 1,4-naphthoquinone, and their mixed systems.
The following conclusions have been drawn: (1) These catalyst systems are all active. (2) The effect of carbon black-ferric sulfate-system or hydroquinone-ferric chloride-system on oxidation efficiency is larger than that of carbon black or hydroquinone alone. (3) In case of carbon black system, the experimentally determined requirement of air is, respectively, about 40, 15, and 10 times larger than theoretical, corresponding to the runs of no catalyst, carbon black, and carbon black-ferric sulfate-system. In case of hydroquinone system, air requirements are, respectively, about 40, 15 and 8 times, corresponding to the runs of no catalyst, hydroquinone-ferric chloride-system and hydroquinone-ferric chloride-ammonium peroxydisulfate-system. (4) Application of the catalyst systems studied was made to wastewater and sludge treatments. These catalyst systems gave good results.
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Ueno, Y., Williams, A. & Murray, F.E. A new method for sodium sulfide removal from an aqueous solution and application to industrial wastewater and sludge. Water Air Soil Pollut 11, 23–42 (1979). https://doi.org/10.1007/BF00163516
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DOI: https://doi.org/10.1007/BF00163516