| 摘要 |
PROBLEM TO BE SOLVED: To provide a water sterilization and purification process and a sterilization and purification agent of superior durability, economic efficiency and safety. SOLUTION: At least one kind selected out of magnesium compounds represented by the formulas of (Mg)1-x (M<2+> )x (OH)2 , (Mg)1-x (M<2+> )x O, and [(Mg)1-x (M<2+> )x ]1-y M<3+> y-δO (in the formulas, M<2+> represents Ca<2+> and/or Zn<2+> , M<3+> represents Al<3+> and/or Fe<3+> , (x) and (y) respectively represent 0 or a positive number satisfying the range of 0<=x<0.2, and 0<y<0.5, andδrepresents the cationic lattice defect amount) is added 0.01 wt.% or more to raw water, and brought into contact for approximately one or more hours, and then, if required, the pH adjustment using the solid-liquid separation and acid is selectively and properly, conducted.
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