Research Progress in Removal of As(Ⅲ) by Simultaneous Oxidation and Adsorption of Manganese Dioxide
Mining, metallurgy and other industrial activities have led to an increasingly serious situation of arsenic contamination in the water environment. Long-term exposure to arsenic through drinking water and food can lead to chronic arsenic poisoning. As(Ⅲ) in water is highly toxic and difficult to remove. Manganese dioxide (MnO2) has received much attention from researchers due to its ability to remove As(Ⅲ) by simultaneous oxidation and adsorption. The research progress of MnO2 towards arsenic removal in recent years was reviewed. Based on the different material structures, the applications of MnO2 and its composites in the oxidative adsorption removal of As(Ⅲ) were summarized from various aspects such as MnO2, MnO2 electrode materials, metal-doped MnO2 and MnO2 loading materials, and their future development was also prospected.
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