Spherical bead like walnut shell based porous carbon adsorption material and preparation method and applications thereof

Abstract

The invention discloses a preparation method of a spherical bead like walnut shell based porous carbon adsorption material. The preparation method comprises following steps: at first, activating walnut shell powder by phosphoric acid, preparing a uniform solution, wrapping the surface of cenospheres by the solution, filling the solution into the cavities of the cenospheres , carrying out carbonization, removing fly ash to obtain a hollow structure of fly ash, and finally generating micro holes by a high temperature alkali activation method to obtain the hierarchical porous carbon material with a high specific surface area. Cheap agricultural wastes namely walnut shells are taken as the carbon source, solid industrial wastes namely fly ash cenospheres (FACs) are taken as the hard template, and the prepared hierarchical porous carbon material is used to process sewage of beta-lactam antibiotics, and the processing effect is good.

Description

technical field [0001] The invention relates to the technical field of preparation of environmental functional materials, in particular to a spherical microbead-shaped walnut shell-based porous carbon adsorption material and a preparation method and application thereof. Background technique [0002] At present, β-lactam antibiotics (BLAs) have become the most widely used class of antibacterial drugs, and are widely used in the treatment and prevention of diseases in human medicine, 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, β-lactam antibiotics are used in the effluent of sewage treatment plants, surface water and Groundwater is frequently detected as a potential new pollutant in the environment. Therefore, it is of great research significance to establish a rapid and cost-effective meth...

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Problems solved by technology

However, these materials have no template support in the alkali activation process, which will lead to the collapse of the carbon framework. Therefore, although the obtained carbon materials have a large specific surface area, only micropores and small mesoporous (<4nm) porous carbon materials can be obtained.

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