查看文章

In this study, we report the desirable conversion of H₂O₂ to radical dotOH with aquifer sediment activated by ascorbic acid. Although aquifer sediment contained various iron minerals, such as goethite, hematite, montmorillonite, muscovite, chlorite and phlogopite, it could not efficiently activate H₂O₂ to produce radical dotOH. Interestingly, the presence of ascorbic acid dramatically promoted the radical dotOH conversion efficiency of H₂O₂ by aquifer sediment to remediate organic contaminants in groundwater, which was ascribed to the efficient iron cycle of aquifer sediment induced by ascorbic acid. Among these minerals in sediment, goethite and hematite were more reactive than other minerals to activate H₂O₂ in the presence of ascorbic acid. Although the initial pH could affect the radical dotOH conversion efficiency of H₂O₂, H₂O₂ could be decomposed by aquifer sediment at pH 3–11 after the introduction of …