Thesis Details

Thesis Title: A study of the feasibility of using activated carbon for the treatment of segregated textile dye wastes
Thesis Author: Craig Rhyne
Abstract: This research was undertaken to determine the feasibility of removing color of selected dyestuff solutions with activated carbon columns. The parameters explored were dye class, flow rate, carbon mesh size, dye molecular size, and temperature of the influent. Three dye types were studied: disperse dyes, anionic dyes, including direct and acid dyes, and cationic dyes. It was found that cationic dyes were removed more effectively by activated carbon than anionic or disperse dyes. Disperse dyes were not appreciably adsorbed by the carbon. but some filtration did occur. Filtration is not desirable with activated carbon columns. and disperse dye color was not considered feasibly removed. Also. two carbon meshes were studied, the smaller mesh carbon generally performed more efficiently than the larger mesh. The flow rate of the dye solutions through the carbon columns was varied with the slower flow rate giving the more favorable color removal. The temperature of the influent was carefully controlled at three levels. The rate of adsorption was greatly increased with an increase in influent temperature. The molecular size of anionic dyestuffs was varied. The smaller the anionic molecule the greater the color removal. With the cationic dyes studied the molecular size did not affect color removal significantly. In conclusion, activated carbon has been shown to be feasible for the treatment of certain dyestuffs, however, adsorption of dyes in activated carbon seems to be very sensitive to physical variables and chemical differences within dye classes.