| 摘要 |
A method for removing anions such as nitrate ion, sulfate ion, chloride ion, and phosphate ion existed in underground water, surface water or waste water, comprising adding alumina cement and a calcium compound into the water containing the anion and followed by applying an electric field thereto, thereby to thereby to form a chemical precipitation which is an insoluble complex salt, and a continuous process for removing the anion by continuously performing the above method for removing anions.
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