MB+, (MB+)2 and (MB+)n : monomer, dimer and agglomerates forms of Methylene blue dye.
NR+H and NR: monomer and conjugate base form of Neutral red dye. Col.: colorless.
MG+ and MG2+H: monomer and protonated cations forms of Malachite green oxalate dye.
|Table 2: Evolution the main absorption bands of dyes in aqueous solution and in dyes/clay-Na suspensions as a function of pH for [MB]= [NR]= [MG]=50mg/L, [Clay- Na]=0.3g/L, T=298K and contact time=60 min (MB and NR) and 80min (MG).|