Superparamagnetic iron oxide nanoparticles (SPION) covered
with a polymer have been used in medical research such as devices
for cell isolation, immobilization of enzymes, controlled release
systems and separation of biological materials [23]. Cellulose
beads covering inorganic particles, a new kind of composite
materials, can be used as organic support. Guo et al. reported the
study of inorganic adsorbents inside cellulose beads in the
elimination of arsenic from aqueous solutions [24]. Thus, cellulose
beads could act as a column bed, suitable for liquid permeability.