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以浮选法从脱硫渣中回收的石墨为原料,采用HUMMERS法制备氧化石墨烯,并以阳离子艳红为目标污染物对氧化石墨烯的吸附性能进行研究。研究表明从脱硫渣中回收的石墨为鳞片石墨,与天然鳞片石墨在晶体结构、形貌等方面无明显差异。2种石墨经氧化后均形成了含有C—OH、—COOH和C—O—C等官能团的氧化石墨烯。氧化石墨烯对阳离子艳红的吸附速率非常快,在5 min后能达到吸附平衡,理论最大吸附量为714 mg·g-1,吸附过程符合Langmuir等温式。
The flotation method was used to recover the graphene oxide from the desulfurized slag as raw material. The HUMMERS method was used to prepare the graphene oxide. The adsorption properties of graphene oxide were studied with cationic brilliant red as the target pollutant. The research shows that the graphite recovered from the desulfurized slag is flake graphite, and there is no obvious difference in the crystal structure and morphology between the flake graphite and natural flake graphite. After the two kinds of graphite were oxidized, they formed graphene oxide with functional groups such as C-OH, -COOH and C-O-C. The adsorption rate of graphene oxide to cation red is very fast, and adsorption equilibrium is reached after 5 min. The theoretical maximum adsorption capacity is 714 mg · g-1. The adsorption process accords with Langmuir isotherm.