吸附
煅烧
亚甲蓝
化学工程
复合数
活性炭
化学
多孔性
硅酸盐
材料科学
核化学
废物管理
光催化
有机化学
复合材料
催化作用
工程类
作者
Wenting Zhao,Huan Zhang,Qingdong He,Lei Han,Tianyang Wang,Fang Guo,Wenbo Wang
标识
DOI:10.1016/j.jclepro.2022.132466
摘要
Converting naturally abundant Coal Gangue (CG) waste into new materials with special functions or excellent performance has always been desirable. Here, the new porous heterogeneous [email protected] composites with high specific surface area of 650.96 m2/g (52.88 times of CG), excellent adsorption and removal ability to cationic dyes were synthesized by a controllable one-pot reconstitution reaction process of calcined CG. The optimal composite adsorbent composed of 10.179% Mg and 0.35% carbon can adsorb 269.86 mg/g of Methylene blue (MB) and 504.91 mg/g of Basic Red 14 (BR), which are 29.2 and 28.6 times higher than that of original CG and calcined CG, respectively. The MB and BR dyes in 200 mg/L of the initial dye solution can be removed almost completely after adsorption with 2 g/L of the composite adsorbent, which is significantly superior to raw CG and calcined CG. The dynamic column adsorption curves indicate the adsorption equilibrium was attained at C/C0 values of 0.78 (for MB adsorption) and 0.75 (for BR adsorption). The used adsorbent can be regenerated and reused for multiple cycles, and the removal efficiency of the adsorbent towards dye is still higher than 90% after 5 regenerations. The adsorption isotherms and adsorption kinetics were studied and the adsorption mechanism was explored. This study demonstrates a feasible way to achieve a sustainable cycle "from waste to environmental purification materials".
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