Method for treating arsenic-containing aqueous solution

摘要: Provided is a method for treating an arsenic-containing aqueous solution by water treatment employing titanium dioxide photocatalyst that excellent in both photocatalytic activity and solid-liquid separation performance. The according to the present disclosure includes steps: of adding catalyst particles solution; oxidizing trivalent arsenic irradiating with light having wavelength 200 nanometers or more 400 less while stirring stopping separating from sedimentation. Each particle composed only zeolite particle, adsorbed on outer surface has silica/alumina molar ratio 10 more, are contained at concentration 0.4 grams/liter 16 less.