The capture and use of solar energy for the destruction of organic pollutants in aqueous media has been studied. The sunlight is captured by ferrioxalate which, in the presence of hydrogen peroxide, generates hydroxyl radicals. The latter reacts with and oxidizes organic molecules present in aqueous media. The efficiency of this new process for the destruction of organic molecules in tap water is at least 25 times greater than sunlight/TiO2/H2O2, which is a known process for solar detoxification.