Potassium acetate based porous carbon adsorption material taking fly ash cenospheres as template and preparation method and applications thereof

Abstract

The invention discloses a preparation method of a potassium acetate based porous carbon adsorption material taking fly ash cenospheres as a template. The preparation method comprises following steps: at first, preparing a uniform solution from potassium acetate, wrapping the surface of fly ash cenospheres by the uniform solution, filling the uniform solution into cavities of the fly ash cenospheres , carrying out carbonization, then removing fly ash to obtain the hollow structure of fly ash, and generating micro pores by a high temperature alkali activation method to prepare a hierarchical porous carbon material with a large specific surface area. Solid industrial wastes namely fly ash hollow cenospheres (FACs) are taken as a hard template; a cheap biomass material namely potassium acetate is taken as a carbon source, the prepared hierarchical porous carbon material is used to process antibiotic (fluoroquinolone) sewage, and the processing effect is good.

Description

technical field [0001] The invention relates to the technical field of preparation of environmental functional materials, and more specifically relates to a potassium acetate-based porous carbon adsorption material with fly ash hollow microbeads as a template and its preparation method and application. Background technique [0002] The third-generation fluoroquinolone antibiotics (such as ciprofloxacin, enrofloxacin, etc.) are new synthetic bactericidal antibacterial drugs, which have strong antibacterial activity, wide antibacterial spectrum, high bioavailability, and can be rapidly decomposed into various It is widely used in human medicine, treatment and prevention of diseases in poultry, livestock and aquaculture. The abuse and illegal use of drugs have led to a large amount of antibiotic residues entering water bodies and soil through human and animal excretion. Nowadays, in many countries including China, fluoroquinolone antibiotics are used in the effluent of sewage t...

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Problems solved by technology

Since fly ash is formed by cooling the pulverized coal after absorbing heat on the hot surface under the condition of suspended combustion, under the effect of surface tension, the surface of fly ash is loose and porous, with a unique hollow structure and good mechanical properties. Ash cenospheres have a high specific surface area, excellent chemical and thermal stability, and are ideal one-dimensional template matrix materials with broad application prospects. However, there is no effective use of fly ash cenospheres in the prior art.

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