Studies on the mechanism of Indigo Carmine removal by solvent sublation.
Indigo Carmine (C16H8N2Na2O8S2), an anionic dye, was removed from aqueous solution by solvent sublation of Indigo Carmine-cetyltrimethylammonium bromide (CTAB) complex (sublate) into 2-octanol. A stoichiometric amount of surfactant (surfactant:dye=2:1) was demonstrated to be able to remove over 93% IC from the aqueous solution in 5 min. The apparent activation energy of attachment of the sublate to bubbles was calculated as 1.3 kJ/mol. Parameters were considered. At the same time, on the base of the complete transport mechanism, a mathematical model for the dye-surfactant complexation was obtained. Furthermore, the simulation of the mathematical and experimental data was made with good results.
Lu
Yujuan
Y
Chemical and Biology Department, Normal College, Shenzhen University, Shenzhen 518060, People's Republic of China. yjlv@21cn.com
Li
Jizhen
J
Zhang
Xueli
X
Tang
Jie
J
Wei
Bo
B
Liu
Jianhong
J