Magnetite particles bearing covalently immobilized copper phthalocyanine dye ("blue magnetite") were prepared and used for the isolation and/or removal of polycyclic dyes from water solutions and suspensions. Binding of these polycyclic dyes occurs by a chemical, equilibrated, and saturatable mechanism, following the Langmuir adsorption model. Nonspecific adsorption of dyes having nonplanar molecular structure was low. The values of maximum adsorption capacity were calculated. The bound dyes were only partially eluted from the adsorbent with methanol and methanol-concentrated ammonia solution (50/1, v/v).