Patent ID: 9187353
Filing Date: 2015-11-17
Classification: B01J,B09C,C02F,Y02W

Abstract:
1. A method of treating a treatment object containing a harmful compound, the method comprising: a step A of bringing a treatment object containing a harmful compound containing an element X that is As, Sb or Se into contact with titanium oxide so as to adsorb the harmful compound on a surface of the titanium oxide; a step B of separating, from the treatment object, the titanium oxide on which the harmful compound is adsorbed; a step C of irradiating the titanium oxide separated from the treatment object with light in a treatment phase containing a radical source so as to cause a reaction between the harmful compound adsorbed on the titanium oxide and a radical generated from the radical source whereby the harmful compound is detoxified, the detoxified harmful compound diffusing from the titanium oxide into the treatment phase; and a step D of separating the titanium oxide from the treatment phase that comprises the detoxified harmful compound, after the step C; wherein the harmful compound contains at least one hydroxyl group, the hydroxyl group is bonded directly to the element X, and in the step C, the harmful compound is converted, by the reaction with the radical, into a compound containing no hydroxyl group that is bonded directly to the element X.