METHOD FOR REMOVING NITRATE IONS FROM A SOLUTION

摘要

The invention relates to a method for removing nitrate ions from a solution, said solution being especially a used decontamination solution or any other given used solution utilized for decreasing radioactivity of a metal part. According to the invention, the solution is irradiated with ultraviolet light if it contains a short-chain organic compound. Such a compound is otherwise inserted into the solution before irradiation. Chemical reduction of nitrate ions is enabled by the inventive method in such a way that, for instance, N2, N2O CO2 and H2O are produced.