DEPHOSPHORIZING MATERIAL AND DEPHOSPHORIZING METHOD

摘要

A dephosphorizing material comprising iron and/or its compound, a cementitious substance, water and a bleeding-accelerating admixture as the starting material and prepared by solidifying the material in such a manner that at least 2.0 wt.% of the water contained therein will cause bleeding to form fine pores with a water absorption of 10 % or above; and a dephosphorizing method which comprises contacting the above material with an aqueous phosphorus-containing solution. This material can effectively reduce the phosphorus concentration in sewage, river and the like by fixing the phosphorus component on its surface. The dephosphorization method is so simple that it can be effected merely by the contact of the dephosphorizing material with the aqueous phosphorus-containing solution, thus being able to remove the phosphorus component effectively without the necessity for any special control.