Abstract
A series of antibacterial ions-containing hydrotalcite-like compounds with various combination of divalent and trivalent matal ions were prepared by wet mothod and their MnO4- ion-derivatives were also obtained by the ion exchange of these hydrotalcite-like compounds with MnO4- ion in low concentration KMnO4 solution. Their bactericidal behavior against Escherichia coli and the influence of content of antibacterial ions were investigated. The products exhibited strong bacteridal activity in aqueous solutions to E. coli, especially hydrotalcite-like compounds obtained after ion-exchange reaction with MnO4- ion. It was suggested that the high bactericidal effect was due to inactivation of E. coli by both Cu2+ ion and/or Zn2+ ion contained in the host layers and MnO4- ion loaded in the interlayer spaces. The eluted amounts of Cu2+, Zn2+ and MnO4- ion from hydrotalcite-like compounds into pure water were so low that they are not harmful to water environment. Therefore, the products are promising as a new antimicrobial water treatment agent for E. coli.
