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Preparation method of nitrogen-doped porous biomass charcoal

A biochar and nitrogen-doped technology, which is applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve the problems of low yield of nitrogen-doped biochar and poor adsorption performance of antibiotic pollutants, etc. , to achieve the effect of low production cost, low equipment requirements and high adsorption performance

Active Publication Date: 2020-09-01
HEILONGJIANG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems that the yield of nitrogen-doped biochar prepared by using chitosan as a single raw material is not high and the adsorption performance of antibiotic pollutants is poor, and a nitrogen-doped porous biochar is provided. Preparation method of material charcoal

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  • Preparation method of nitrogen-doped porous biomass charcoal
  • Preparation method of nitrogen-doped porous biomass charcoal
  • Preparation method of nitrogen-doped porous biomass charcoal

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specific Embodiment approach 1

[0043] Specific embodiment one: the preparation method of a kind of nitrogen-doped porous biochar of this embodiment is carried out according to the following steps:

[0044] One, join chitosan into water, add glacial acetic acid solution to promote chitosan dissolving simultaneously, obtain chitosan solution; The mass of chitosan in the described chitosan solution and the volume ratio of water are 0.01g: 1mL ; The volume concentration of the glacial acetic acid solution is 2%, and the volume ratio of the glacial acetic acid solution and water is 0.1:1;

[0045] 2. Mix 100mL of the chitosan solution obtained in step 1 with 100mL of sodium lignosulfonate solution with a concentration of 0.01g / mL and a pH value of 12, and then centrifuge at a speed of 8000r / min for 5min to remove the supernatant liquid, resulting in a precipitate;

[0046] 3. The precipitate obtained in step 2 is first dried at 50° C., and then calcined. After the calcining is completed, it is soaked in a potas...

specific Embodiment approach 2

[0048] Embodiment 2: This embodiment is different from Embodiment 1 in that: the pH value of the sodium lignosulfonate solution described in step 2 is 7. Other steps and parameters are the same as those in the first embodiment.

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Abstract

The invention discloses a preparation method of nitrogen-doped porous biomass charcoal, and belongs to the technical field of environmental materials. The invention aims to solve the problems of low yield of nitrogen-doped biomass charcoal prepared by using chitosan as a single raw material and low adsorptive property to antibiotic pollutants at present. The method comprises the following steps: 1, adding chitosan and glacial acetic acid into water to prepare a chitosan solution; 2, uniformly mixing the chitosan solution with a sodium lignosulphonate solution, and centrifugally collecting thegenerated precipitate; 3, drying the precipitate, calcining, soaking the calcined precipitate in a potassium hydroxide solution, standing, filtering, and collecting the filter residues; and 4, calcining the filter residues, soaking with hydrochloric acid, washing with distilled water for 3-5 times, and finally drying to obtain the nitrogen-doped porous biomass charcoal. The method has the advantages of simple operation, low equipment requirements, cheap and easily available raw materials, and suitableness for industrial production. The adsorption performance is excellent, and the removal rateof antibiotics is as high as 95%.

Description

technical field [0001] The invention belongs to the technical field of environmental materials, and in particular relates to a preparation method of nitrogen-doped porous biomass charcoal. Background technique [0002] With the continuous advancement of biomedicine, antibiotics play a pivotal role in the treatment of human and animal diseases. However, the extensive use or even abuse of antibiotics in the medical pharmaceutical industry, aquaculture and animal husbandry has polluted the environment. At the same time, some antibiotics that seep into groundwater and hide in agricultural soil will enter the human food chain, making antibiotics that should benefit human beings harmful to human beings. health threat. [0003] In order to solve the problem of antibiotic wastewater pollution, researchers have explored and discovered a series of treatment methods such as ozone oxidation, microbial method, membrane separation method, electrochemical method and physical adsorption me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/28B01J20/30C02F101/38C02F101/36
CPCB01J20/02B01J20/20C02F1/283B01J20/28064C02F2101/36C02F2101/38B01J2220/4837B01J2220/4825
Inventor 潘清江
Owner HEILONGJIANG UNIV
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