Importance

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Abstract

Disclosed herein is a method capable of economically treating water containing water-insoluble substance. The method for treating water containing water-insoluble substance, typified by produced water, using a porous material having functional groups on its surface and preferably made of an inorganic oxide includes: a first step of bringing an aqueous solution containing ions ion-exchangeable for the functional groups into contact with the surface to attach the ions to the surface; and a second step of allowing the water containing water-insoluble substance to pass through the porous material from the surface having the ions attached thereto to remove the water-insoluble substance from the water containing water-insoluble substance. The method may further include, after the first step but before the second step, the step of firing the porous material under a temperature condition of 300° C. to 500° C. for 1 to 5 hours.

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First Claim