Fabrication, performance and mechanism of MgO meso-/macroporous nanostructures for simultaneous removal of As(III) and F in a groundwater system

摘要: The coexistence of arsenic and fluoride in groundwater has attracted extensive attention worldwide, it is crucial importance to efficiently remove them. In this study, hierarchically meso-/macroporous MgO using nanosheets as building blocks with pore size distribution the range 10 150 nm was synthesized. maximum adsorption capacities for As(III) F were found be about 540.9 mg g−1 (7.22 mmol g−1) 290.67 (15.30 g−1), respectively. Research indicated that a broad multimodal provided suitable channels ion diffusion, which conducive proximity contaminants internal surfaces adsorbent. Thermodynamic models demonstrated two types active sites coexisted on surface. mechanisms proposed include surface complexation well exchanges hydroxyl carbonate groups. Moreover, removal rates co-contaminated sample determined 98.9% 95%,