Removal of organic polycyclic compounds from water solutions with a magnetic chitosan based sorbent bearing copper phthalocyanine dye

Magnetic chitosan gel particles, bearing covalently immobilized copper phthalocyanine dye (“magnetic blue citosan”), were prepared and used for the isolation and/or removal of polycyclic dyes from water solutions and suspensions. Binding of these polycyclic dyes occures by a chemical equilibrated and saturatable mechanism, following the Langmuir adsorption model. The values of maximum uptake (maximum adsorption capacity) were calculated. The bound dyes can be eluted from the sorbent with methanol, methanol-conc. ammonia solution (50/1, v/v) and 10% acetic acid.