Kinetic of Th ions adsorption process in the magnetic chitosan

A magnetic bio absorbent called chitosan was prepared and it potentiality for removal Th ions in nitric medium was verified. The chitosan is a derivative processed from crustacean shells which is a fishing residue. The adsorption studies were accomplished by essays in batch. The equilibrium time was determined for the concentration of Th 101,4 mg L-1 and the kinetic of equilibrium was analysed according to the pseudo-first order, pseudo-second order and intra particle diffusion models. A removal of 35 % by adsorption was observed to confirm that the magnetic chitosan posses a considerable potential as Th absorbent. The magnetic use of chitosan can contribute in the economic and environmental aspects, viewing the low cost of chitosan and the strategies application of control of fishing activity residues and radionuclides with development of a sustainable technology