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Regeneration of spent earth by wet oxidation
Author(s) -
Kalam Abul,
Joshi J. B.
Publication year - 1988
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02898323
Subject(s) - oxidizing agent , freundlich equation , adsorption , oxygen , earth (classical element) , slurry , chemistry , partial pressure , regeneration (biology) , environmental chemistry , environmental engineering , environmental science , organic chemistry , biology , physics , mathematical physics , microbiology and biotechnology
Regeneration of deoiled spent earth by wet oxidation has been investigated. Molecular oxygen was used as an oxidizing agent. Effects of operating parameters such as speed of agitation, temperature, oxygen partial pressure, slurry concentration, and cycle of regeneration have been studied. Kinetics of regeneration was found to be first order with substrate concentration and also with dissolved oxygen concentration. Decolorization capacity of regenerated earth was the same as that of its virgin bleaching earth. Adsorption isotherm data was fitted in Freundlich equation. The values of Freundlich constants of regenerated earth were comparable with the values of virgin bleaching earth.