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, ...

Examples

Embodiment 1

[0024] Dry Zailihua naturally for seven days, chop the raw materials, grind them into powder, pass through a sieve with a sieve aperture of 1mm, and put them in an oven at 105°C for three hours; then put them into a carbonization furnace with nitrogen gas for high-temperature carbonization, and the heating rate is divided into 5°C / min, heat up to 500°C, keep warm for two hours, and cool to room temperature. Introduce carbon dioxide gas for high-temperature activation, the heating rate is 5°C / min, and the temperature is raised to 600°C, kept for two hours, and cooled to room temperature. The specific surface area of ​​the final product reaches 287.95m 2 / g, calcium content 18.10g / kg, magnesium content 3.43g / kg.

[0025] The adsorption effect takes the experiment of activated carbon product adsorption of phosphorus in water as an example.

Embodiment 2

[0027] Weigh 0.2g of activated carbon sample, place it in a 500ml Erlenmeyer flask, add 50ml of 1mg / L KH with different initial concentrations 2 PO4 solution, three replicates for each sample, placed in a constant temperature shaker, shaken at 120r / min, 25°C for 48h, filtered, pipette the supernatant, and use the molybdenum blue colorimetric method to analyze and calculate the phosphorus in the remaining solution After testing, the phosphorus removal rate of activated carbon products reached 70.30%.

Embodiment 3

[0029] Weigh 0.2g of activated carbon sample, place it in a 500ml Erlenmeyer flask, add 50ml of KH with different initial concentrations of 2mg / L 2 PO4 solution, three replicates for each sample, placed in a constant temperature shaker, shaken at 120r / min, 25°C for 48h, filtered, pipette the supernatant, and use the molybdenum blue colorimetric method to analyze and calculate the phosphorus in the remaining solution After testing, the removal rate of phosphorus by activated carbon products reached 79.17%.

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, ...

Examples

Embodiment 1

[0024] Dry Zailihua naturally for seven days, chop the raw materials, grind them into powder, pass through a sieve with a sieve aperture of 1mm, and put them in an oven at 105°C for three hours; then put them into a carbonization furnace with nitrogen gas for high-temperature carbonization, and the heating rate is divided into 5°C / min, heat up to 500°C, keep warm for two hours, and cool to room temperature. Introduce carbon dioxide gas for high-temperature activation, the heating rate is 5°C / min, and the temperature is raised to 600°C, kept for two hours, and cooled to room temperature. The specific surface area of ​​the final product reaches 287.95m 2 / g, calcium content 18.10g / kg, magnesium content 3.43g / kg.

[0025] The adsorption effect takes the experiment of activated carbon product adsorption of phosphorus in water as an example.

Embodiment 2

[0027] Weigh 0.2g of activated carbon sample, place it in a 500ml Erlenmeyer flask, add 50ml of 1mg / L KH with different initial concentrations 2 PO4 solution, three replicates for each sample, placed in a constant temperature shaker, shaken at 120r / min, 25°C for 48h, filtered, pipette the supernatant, and use the molybdenum blue colorimetric method to analyze and calculate the phosphorus in the remaining solution After testing, the phosphorus removal rate of activated carbon products reached 70.30%.

Embodiment 3

[0029] Weigh 0.2g of activated carbon sample, place it in a 500ml Erlenmeyer flask, add 50ml of KH with different initial concentrations of 2mg / L 2 PO4 solution, three replicates for each sample, placed in a constant temperature shaker, shaken at 120r / min, 25°C for 48h, filtered, pipette the supernatant, and use the molybdenum blue colorimetric method to analyze and calculate the phosphorus in the remaining solution After testing, the removal rate of phosphorus by activated carbon products reached 79.17%.

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