摘要：An attempt was made to detach bacterial biofilm, formed by Staphylococcus epidermidis , by using hydrogen peroxide (H2O2) and tungsten compounds. When iron(II) (Fe2+) was mixed with undecatungstophosphate ([PW11O39]7−) and then H2O2, the resulting mixture was able to totally remove the biofilm probably because of co-generation of 1O2 and ·OH. A mixture of undecatungstosilicate ([SiW11O39]8−) and Fe2+ (or Cu2+) also gave a good result, but their catalytic activities for producing ·OH (or 1O2) were rather weak. An electron microscopic study showed that almost nothing was visible on the surface of a biofilm-coated glass after treatment with 1m M [PW11O39]7−+1 m M Fe2+ and 500 m M H2O2 (incubated for 1 h at 37 °C).
