5. Conclusions
Polyaniline doped with SO42−/TiO2 superacid has been found to be an effective electrically conductive macromolecule. Electrolyzing the strippable coating film of polyaniline doped with SO42−/TiO2 superacid is an effective method for decontaminating radioactive pollutants. Compared with the traditional decontamination methods, this method achieved to be less expensive, producing less waste and saving much labor and time. When preparing the coating film, replacing HCl by SO42−/TiO2 solid superacid is excellent because when electrolyzing, it does not corrode the electrode, avoids the bubbling problem which will separate the film from the substrate and produces less waste that would need further disposal. Coating and electrolyzing the film in wet or dry media yield high decontamination ratios. The latter one seems to be more promising, as it is more convenient and effective. This new application of solid superacid also sets light on its special characteristics and its application field.