Treatment method for fluorine- and aluminum-containing water

Abstract

The present invention provides a treatment method for fluorine- and aluminum-containing water, in which a chelating agent is added to fluorine- and aluminum-containing water in an amount of 100 times or more by weight of the aluminum concentration in the fluorine- and aluminum-containing water, and then water is passed through a reverse osmosis membrane device. The pH of the fluorine- and aluminum-containing water is preferably 4 to 6. The chelating agent is preferably EDTA. The F ion concentration in the water to be treated is preferably 50 to 700 mg/L, and the Al ion concentration therein is preferably 0.01 to 1 mg/L.

Dependencies are inferred from the claim text.