BORON-CONTAINING WATER TREATMENT METHOD

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PROBLEM TO BE SOLVED : To provide a boron-containing water treatment method for recovering boron by evaporation and concentration of recycled drainage obtained by adsorbing and removing boron in boron-containing water and desorbing the boron, which can recover boron economically by fractionating and collecting high boron concentration recycled drainage, and reducing the evaporation and concentration volume of the drainage. SOLUTION : In the boron-containing water treatment method for recovering boron by evaporating and concentrating the recycled drainage which is obtained by adsorbing and removing the boron in the boron-containing water by using a granular material where a hydrous oxide of a rare earth element is carried by a porous carrier, and desorbing the boron from the granulated material by an alkali aqueous solution, the concentration of the boron in the recycled drainage is decided from the electric conductivity or pH of the recycled drainage to fractionate and collect the high boron concentration recycled drainage.