Adsorption of dyes on to cellulose

The presence of carboxyl groups at the surface of cellulose fibres is the great importance in papermaking industry. In our work the phenomenon of methylene blue adsorption in the pulps suspensions of three different pulps by UV-Visble spectroscopy are studied. These results of non refinery and refinery pulps of bleached eucalyptus, softwood of Tarascon and linter cotton were compared. Other method such as zeta potential was investigated to better understanding of this phenomenon.