A kind of preparation method of fishbone charcoal defluoridation electrode

Abstract

The invention discloses a making method of a fish bone charcoal fluoride removal electrode. According to the method, fish bone is cleaned and dried, is subjected to primary pulverization, and is put into a grinding machine to be ground into fish bone powder; the fish bone powder is put into a vacuum tubular furnace to be carbonized to obtain fish bone charcoal; the fish bone charcoal, PVDF and carbon black are taken and are uniformly stirred so that the materials are fully mixed to obtain a mixture; N,N-dimethylacetamide is added into the obtained mixture while the stirring is performed till slurry is obtained; the slurry is stirred and mixed for 2 to 4h; the stirred slurry is uniformly coated on an electrode plate; the electrode plate coated with the slurry is put into a drying oven to be dried; the fish bone charcoal fluoride removal electrode is obtained. The major ingredient of the fish bone charcoal is hydroxyapatite; a porous structure is realized; the fluoride can be removed in modes of in exchange, adsorption, dissolution precipitation and the like. The fish bone charcoal fluoride removal electrode can effectively remove fluoride ions under the condition of low energy consumption. Therefore the fish bone charcoal fluoride removal electrode has the promotion value in the fluoride-containing sewage treatment aspect.

Description

technical field The invention belongs to the technical field of environmental engineering, and in particular relates to a manufacturing method of a herringbone charcoal defluorination electrode. Background technique The principle of electrosorption is that when a potential is applied, an electric double layer is formed at the interface of the electrode solution. When the electrodes are energized, the charge of the electrodes is compensated by oppositely charged ions or charged particles on the electrolyte side of the electric double layer by adsorption, or by enrichment of opposite charges on the outer Helmholtz surface with the diffusion layer. In this way, the ions or charged particles will be enriched and concentrated on the surface of the electrode, so that the concentration of salts, colloidal particles and other charged substances in the treated water will be greatly reduced, thereby realizing the desalination, hardening, desalination and purification of water. In sum...

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Problems solved by technology

However, due to the small particle size of bone char, it will increase the head loss of the adsorption column, which is not ideal in practical applications.

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