Keywords
SO42−/TiO2; Solid superacid; Polyaniline; Radioactive pollution; Electrolysis
1. Introduction
Nuclear components and systems can be contaminated by radioactive elements, such as uranium. Also, various environmental materials' surfaces can be contaminated in case of accidental releases of radioactive materials. Methods to decontaminate the pollutants safely and efficiently can be a major problem, in particular for corroded and rough surfaces of component internal parts (Roberts, 1998). The film-coating method is a good method for decontaminating the pollutants attached to the surfaces, but usually it could not effectively eliminate the pollutants which had seeped into the inner body of the equipment. To solve this problem, we combined the film-coating and electrolyzing method. When electrolyzing, the internal radioactive pollutants moved into the conductive film, interacted with its components and then could be eliminated.
Polyaniline (PAn) has been regarded as the most applicable conductive polymer. The accepted structure of polyaniline is proposed by Mac Diarmid et al. (1987) as follows: