The time required for removal of Br.G, To.B and Tr.B by [email protected] was tested by shaking dye solutions at different time (3-60 min). Fig.1AS showed that the acceptance time need for complete removal of Br.G, To.B and Tr.B were 60, 60 and 15 min, respectively. Firstly, the percentage removal was very fast, then slow gradually as saturation active sites achieved and adsorption process become slower.
The diffusion rates of Br.G, To.B and Tr.B onto [email protected] were estimated using Weber-Morris (4), Bangham (5) and Reichenberg (6) equations.
Q_(t )= K_i ?t (4)
log?log??C?/(C?-Q_(t ) m)? = log??(K? m)/(2.303 V) +? log?t ? (5)