| 摘要 |
The present invention provides: a phosphorous-collecting material which has excellent phosphorous adsorption performance and can exhibit an excellent sedimentation property after adsorbing phosphorous; a method for producing the phosphorous-collecting material; and a phosphorous collection method. The phosphorous-collecting material according to the present invention comprises an amorphous calcium silicate hydrate alone or a complex of the amorphous calcium silicate hydrate and Ca(OH)2, wherein the amorphous calcium silicate hydrate is produced by mixing an aqueous sodium silicate solution with lime under non-heating conditions, and wherein the Ca/Si molar ratio in the hydrate alone or the complex is 0.8 to 20. The method for producing a phosphorous-collecting material according to the present invention comprises mixing an aqueous sodium silicate solution with lime under non-heating conditions to produce the amorphous calcium silicate hydrate alone or the complex of the amorphous calcium silicate hydrate and Ca(OH)2. The phosphorous collection method according to the present invention comprises mixing phosphorous-containing water with the amorphous calcium silicate hydrate alone or the complex of the amorphous calcium silicate hydrate and Ca(OH)2 to produce aggregates on which phosphorous is adsorbed and then subjecting the aggregates to solid/liquid separation to collect phosphorous. |
