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Removal of fine particles from aqueous medium by flotation: Sodium dodecylbenzenesulfonate‐barium sulfate system
Author(s) -
Kubota Katsuyuki,
Harima Toshihiro,
Hayashi Shinya
Publication year - 1990
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450680411
Subject(s) - sodium dodecylbenzenesulfonate , pulmonary surfactant , aqueous solution , chemistry , barium sulfate , barium , particle (ecology) , electrophoresis , sodium dodecyl sulfate , bubble , sulfate , barium sulphate , analytical chemistry (journal) , chemical engineering , chromatography , inorganic chemistry , mechanics , physics , organic chemistry , biochemistry , radiochemistry , oceanography , engineering , geology
Insoluble barium sulfate particles were removed from water by a batch flotation technique using an anionic surfactant as a frother and collector. The measured particle concentrations are presented as a function of the elapsed time and compared with values predicted by a simple hydrodynamic collision model. The model predictions were in reasonable qualitative agreement with the experimental results. However, the attachment efficiency observed was found to be much smaller than unity, suggesting that an electrical repulsive force may affect the flotability. Accordingly, electrical mobilities for the air bubbles and the particles were measured by the electrophoresis method, and the energy barrier between the particles and the bubble surfaces was found to be relatively large.