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The interaction of four ionic dyes, C.I. Mordant Black 11, C.I. Mordant Black 17, C.I. Direct Yellow 50 and C.I. Basic Blue 9, with cationic and anionic surfactants was studied by absorption spectroscopy. The dyes interact strongly with oppositely charged surfactant in the premicellar concentration range and the appropriate values of constant of dye–surfactant complex formation were estimated. In...
Separation of organic dyes from micellar solutions was studied in a cross-flow SEPA CF Osmonics module. Several model dyes (methylene blue, mordant black 11 and mordant black 17) were investigated. Sodium dodecylsulfate (SDS), hexadecyltrimethylammonium bromide (CTAB), oxyethylated coconut fatty acid methyl esters (OMC-10) and binary mixtures of ionic and nonionic surfactants were used as surfactants...
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