A large percentage of dye removal was due to the large number of negatively charged binding sites on the adsorbent, which provides affinity for cationic dyes
Removal of Cationic Dyes
from Aqueous Solution using Magnetic Multi-Wall Carbon Nanotube Nanocomposite as Adsorbent.
They consist of cationic dyes
for semi-permanent applications that are in compliance with global regulations, as well as a vast portfolio of intense colors for natural and pastel tones.
Disperse dyes give excellent overall fastness properties with polyester whereas basic dyes are water soluble cationic dyes
where the coloured part has a positive charge, interacts with the negative group (either carboxyl or sulfonic acid group) of the fibre molecule (Choi et al., 2000).
Pui, "Studies on adsorption capacity of cationic dyes
on several magnetic nanoparticles," Acta Chemica Iasi, vol.
Xie, "Reduced graphene oxide modified luffa sponge as a biocomposite adsorbent for effective removal of cationic dyes
from aqueous solution," Desalination and Water Treatment, vol.
A comparative adsorption study with different industrial wastes as adsorbents for the removal of cationic dyes
It has been proven that the affinity of MAC to cationic dyes
is much higher than that to anionic dyes.
Jiao, "Starch-derived carbon aerogels with high-performance for sorption of cationic dyes
," Polymer, vol.
The surface of the adsorbent gets negatively charged and favors uptake of cationic dyes
to increased electrostatic force of attraction.