Fremgangsmåte for å fjerne forurensninger, samt et rensemateriale

摘要

A photocatalyst based mainly on titanium dioxide or a mixture of titanium dioxide and activated charcoal is fixed using fluororesin or the like to produce a sheet or panel-shaped purifying material, which is disposed in the outdoors utilizing exterior walls of a building, in order to remove low-concentration nitrogen oxides and the like in environmental atmosphere. The photocatalyst applied with near-ultraviolet rays in sunlight is activated to convert nitrogen oxides in the atmosphere to nitric acid and the like and catch the products on the surface. The photocatalyst reduced in activity due to accumulation of the products is washed by rainfall to restore the activity. Further, using the purifying material, volatile pollutants transferred from water to a gas, or pollutants in water are decomposed by titanium dioxide.