| 摘要 |
[Problem] The present invention addresses the problem of providing a purified water production method and a water purification apparatus for efficiently removing impurities such as heavy metal ions and arsenic. The present invention also addresses the problem of reducing the size of a central water purification apparatus for supplying purified water to an entire structure such as an apartment or office building. [Solution] This production method for purified daily life water that adds a nucleating agent to raw water and filters same with a membrane means is characterized in that: for said nucleating agent, an aqueous dispersion of ferric hydroxide colloid particles of 5-160 nm weight average particle diameter is used; and the ratio of the mass of iron in the ferric hydroxide colloidal particles with respect to the total mass of iron added to the raw water is at least 0.9. |
