| 초록 |
The concentration of aqueous manganese in groundwater is increasing every year. Recent studies have shown that high concentrations of manganese are harmful, such as Parkinson's disease, headache, convulsions, and decreased cognitive abilities. However, because of the sluggish oxidation rate of Mn2+(aq) to Mn(III/IV) and subsequent precipitation to Mn oxides, removing Mn2+(aq) is considered a technically difficult and expensive process. Therefore, it is necessary to develop a novel sustainable process of Mn remediation in aqueous systems. Here, using abiotic photocatalytic oxidation of Mn2+(aq) by goethite, we show similar or faster oxidation rates than that of biotic processes, which have been believed as the most effective pathway to oxidize Mn2+(aq). In addition, we explore that temperature significantly governs the photocatalytic oxidation rate of Mn2+(aq) by goethite. Based on the natural abundance of goethite, one of the most commonly occurring iron oxide on Earth, the rapid photocatalytic oxidation by goethite provides a novel economical and environmental pathway to sustainably remediate Mn contaminated water systems. |
