Adsorption removal of pollutants (triphenylmethane and xanthene dyes) from water by charfines and activated carbon

The adsorption removal of Triphenylmethane & Xanthene dyes onto a low-cost coal based adsorption (Charfines) and its efficiency in dye colour sorption was compared with activated carbon (F-400). Batch studies were performed and the results revealed that Charfines demonstrated on ability to adsorb the reactive Triphenylmethane & Xanthene dyes. The sorption interaction of reactive dye on to Charfines obeys the first order rate equation. The sorption data indicates that the adsorptive removal of the dye from equeous solution is rather comlex involving both boundary layer diffusion and interporticle diffusion. The process of dye sorption while activated carbon resulted in physisorption interaction. Dye sorption is found to be dependent on the aqueous phase pH and the dye uptake is greater at lower pH.