Efficient and safe preparation method for active carbon material for adsorbing phosphorus in water body

Abstract

The invention relates to preparation for an active carbon material, aiming at providing an efficient and safe preparation method for an active carbon material for adsorbing phosphorus in a water body. The method comprises the following steps of: naturally air-drying thalia dealbata for 7 days, chopping, grinding into a powder, sieving, and then placing in an oven and drying for 3 hours; placing the dried powder in a carbonization furnace, performing high-temperature carbonization while charging nitrogen, heating to 500 DEG C, insulating heat for 2 hours, and then cooling to a room temperature; and performing high-temperature activation while charging carbon dioxide gas in the carbonization furnace, heating to 600 DEG C, insulating heat for 2 hours, and then cooling to a room temperature to obtain the product. Via the preparation method disclosed by the invention, the problem of plant waste treatment in water body purification is solved, the possibility that plant branches and leaves contaminate the water body after being withered is prevented, and waste is turned into wealth; and the prepared biomass active carbon is used for further purifying the water body, thus solving the problem of the possibility of secondary pollution in the water body which is purified by active carbon. The preparation method has the advantages of being high in treatment efficiency, economic and practical, green and environment-friendly, cyclic in purification and the like, as well as achieves the expected effect of efficient decontamination.

Description

technical field [0001] The invention relates to the preparation of activated carbon materials, in particular to an activated carbon material and a preparation method for efficiently and safely adsorbing phosphorus in water bodies. Background technique [0002] As an excellent adsorbent, activated carbon has a unique specific surface area and pore volume and is widely used in various aspects of life, such as decolorization, deodorization, etc. Today, activated carbon is used more and more frequently in the environment. In water treatment, it is widely used to remove colorants, chlorides and other organic substances, as well as heavy metals. At present, the application of activated carbon to the adsorption of phosphorus in water mainly includes the physical adsorption of specific surface area and the precipitation reaction of metal ions and phosphate radicals on the surface of activated carbon. Due to the limited effect of untreated activated carbon adsorption of phosphorus, ...

AI Technical Summary

Problems solved by technology

The chemical activation method can produce a specific surface area that is more developed than the physical activation, but it needs to be cleaned after activation, which will pollute the environment

Catalytic physical activation method, the addition of a catalyst can effectively increase the physical activation speed, but adding a catalyst will still cause environmental safety hazards

The activated carbon used to adsorb phosphorus on the market mainly improves the adsorption capacity of activated carbon through chemical modification to increase the specific surface area. Chemically modified activated carbon can be used for industrial sewage treatment of phosphorus, but it cannot be used in drinking water bodies, upstream reservoirs, etc. The adsorption of phosphorus in drinking water can easily cause secondary pollution

[0004] Therefore, the physical modification of activated carbon technology is very important, but there is no example of an activated carbon that has a good effect of adsorbing phosphorus after physical modification.

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