Abstract
Phosphorus removal in water was examined using charoal made from industrial waste materials such as magnetic cards, and magnetic tapes. The efficiency of phosphorus removal by the magnetic card charcoal was two times higher than those by the magnetic tape charcoal and the activated carbon of special grade. From adsorption isotherms, the parameters, k and n-1, in the Freundlich equation (q=kcn-1) were estimated to be 12.6 mg-P·g-1 and 0.22, respectively. The phosphorus removal mechanism will be discussed by comparing the effect of carbonization temperature (600-800°C) on phosphorus adsorption efficiency. The phosphorus removal mechanism is mainly chemical adsorption. It is considered that metallic ions on the surface of charcoal become active sites of adsorption.
