| abstract |
A harmful arsenic, antimony and selenium compounds, a process for detoxifying with vitamin B 12 derivative, to provide a method for improving the cost. A step of reducing a specific vitamin B 12 derivative by irradiation with light in the presence of a titanium oxide photocatalyst (A); methylating the reduced vitamin B 12 derivative with a methyl group donor step (B) to obtain a vitamin B 12 derivatives; and vitamin B 12 derivative and methylated with, arsenic atom, an antimony atom, and a harmful compound containing at least one atom selected from the group consisting of selenium atoms, oxidation This is a method for detoxifying harmful compounds, which comprises the step (C) of regenerating the vitamin B 12 derivative while methylating the harmful compounds by light irradiation in the presence of a titanium photocatalyst. [Selection figure] None |