Removal of Refractory Organics from Water by Aeration. II. Solvent Sublation of Methylene Blue and Methyl Orange

Abstract

The solvent sublations of methylene blue-sodium tetradecylsulfate and of methyl orange-hexadecyltrimethylammonium bromide were carried out in lab-scale batch apparatus. Removal was from water to 2-octanol. Three possible mechanisms were examined in detail; the colored species removed in both cases is believed to consist of one ion of dye complexed with two of surfactant. Mass transfer rate effects in the vicinity of the bubble-water interface were examined theoretically, and the empirical time constant for mass transfer related to the lowest eigenvalue of a suitably selected diffusion problem.