摘要 : Organic matter accumulation in water can cause serious problems such asoxygen depletion and quality deterioration of waters. While calcium carbonatehas been used as green and low-cost adsorbent for water treatment, itsefficiency i... 展开 Organic matter accumulation in water can cause serious problems such asoxygen depletion and quality deterioration of waters. While calcium carbonatehas been used as green and low-cost adsorbent for water treatment, itsefficiency in reducing the chemical oxygen demand (COD) of water, which is ameasure of organic pollution, is restrained by the limited specific surface areaand chemical activity. Herein, inspired by the high-magnesium calcite (HMC)found in biological materials, a feasible method to synthesize fluffydumbbell-like HMC with large specific surface area is reported. Themagnesium inserting increases the chemical activity of the HMC moderatelybut without lowering its stability too much. Therefore, the crystalline HMCcan retain its phase and morphology in aqueous environment for hours, whichallows the establishment of adsorption equilibrium between the solution andthe adsorbent that retains its initial large specific surface area and improvedchemical activity. Consequently, the HMC exhibits notably enhanced capabilityin reducing the COD of lake water polluted by organics. This work provides asynergistic strategy to rationally design high-performance adsorbents bysimultaneously optimizing the surface area and steering the chemical activity. 收起