Preparation method of Fe3O4-biochar composite nanomaterial and method for degrading organic pollutants in water body

A technology of composite nanomaterials and organic pollutants, applied in water pollutants, water/sludge/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc., can solve the difficulty of microorganism cultivation and screening, and limit technology Problems such as application and treatment efficiency, insufficient adsorption capacity, etc.

Inactive Publication Date: 2021-05-18
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in the adsorption method, the adsorption capacity of granular activated carbon is not large enough and the recovery rate of powdered activated carbon is very low, which will increase the treatment cost; in the oxidation method, the oxidation effect of hydrogen peroxide alone is not good enough; microorganisms are not easy to cultivate and screen, and are greatly affected by environmental conditions , both limit the application of technology and the improvement of processing efficiency

Method used

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  • Preparation method of Fe3O4-biochar composite nanomaterial and method for degrading organic pollutants in water body
  • Preparation method of Fe3O4-biochar composite nanomaterial and method for degrading organic pollutants in water body
  • Preparation method of Fe3O4-biochar composite nanomaterial and method for degrading organic pollutants in water body

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Experimental program
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Embodiment 1

[0042] a Fe 3 O 4 -The preparation method of biochar composite nanomaterial, comprising steps as follows:

[0043] 1) After drying in an oven at 80°C, pulverize the fallen leaves of Arborvitae into powder, place the powder in a tubular furnace at 600°C, decarbonize with nitrogen for 2 hours, and soak the obtained black powder in a 1mol / L hydrochloric acid solution. Inorganic components were removed for 24 hours, washed with water until neutral, and dried to obtain biochar;

[0044]2) One-step co-precipitation method to synthesize Fe 3 O 4 - Biochar composite nanomaterials: 0.001mol FeSO 4 ·7H 2 0 and 0.02mol FeCl 3 ·6H 2 0 Add 30ml of 0.01mol / L hydrochloric acid solution, add 2g of biochar after dissolving, stir mechanically, then transfer the mixture to a 500ml three-necked flask, and introduce nitrogen for continuous stirring for 30 minutes. 80ml of 3mol / L NaOH solution was added dropwise, and after continuous stirring for 3h reaction, alternately washed with ultrapu...

Embodiment 2

[0047] A Fe-based 3 O 4 A method for degrading organic pollutants in water (taking bisphenol A as an example) by the peroxymonosulfate system of biochar composite nanomaterials, the steps are as follows:

[0048] will Fe 3 O 4 - Biochar composite nanomaterials are added to wastewater containing bisphenol A, Fe 3 O 4 - The dosage of biochar composite nanomaterials is 1.5g / L, and then permonosulfate is added to make the concentration reach 3mM, pH=3.0, and the system is placed in a constant temperature shaker at 30°C, and the reaction time is 120min. Keep other conditions unchanged, only replace Fe 3 O 4 - Biochar composite nanomaterials are biochar and Fe 3 O 4 , the removal results see Figure 4 .

[0049] For comparison, the embodiment compares at the same time without adding permonosulfate (PMS), only adding Fe 3 O 4 , biochar, Fe 3 O 4 - Biochar, adding Fe at the same time 3 O 4 In the four cases of biochar and biochar, the dosage was 1.5g / L, the pH was adju...

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Abstract

The invention relates to a preparation method of a Fe3O4-biochar composite nanomaterial and a method for degrading organic pollutants in a water body. Fe3O4 particles in the Fe3O4-biochar composite nanomaterial are uniformly distributed in biochar pores, the specific surface area of the composite material is 90-100m <2> / g, and the pore volume is 0.1-0.3 cm<3> / g. The Fe3O4-biochar composite nanomaterial is applied to degradation of organic pollutants in a peroxymonosulfate system, and the adsorption and catalysis synergistic effect of the Fe3O4-biochar composite nanomaterial can significantly improve the removal efficiency of the organic pollutants in a Fe3O4-BC / PMS system. Under the condition that the pH is 3.0, the efficiency of removing organic pollutants within 90 minutes reaches 100%.

Description

technical field [0001] The present invention relates to a kind of Fe 3 O 4 -The preparation method of biochar composite nanomaterials and the method for degrading organic pollutants in water belong to the technical field of new material synthesis and organic pollutant degradation. Background technique [0002] At present, the methods of removing organic pollutants in water involve physical, chemical and biological methods. For example, commonly used adsorption technology, chemical oxidation technology, membrane bioreactor and advanced oxidation technology. [0003] The adsorption technology is to use the huge surface area of ​​the porous adsorbent to fix the adsorbed substance on the surface of the adsorbent by the action of van der Waals force or chemical bond, so as to achieve the purpose of degrading pollutants. Chemical oxidation is to oxidize and decompose organic pollutants through the strong oxidizing properties of oxidants. Traditional oxidants include ozone, hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J23/745B01J35/02B01J35/10C02F1/28C02F1/72C02F101/30
CPCB01J20/06B01J20/20B01J20/28007B01J20/28009B01J20/28059B01J20/28071B01J23/745B01J35/023B01J35/1014B01J35/1038C02F1/283C02F1/725C02F2101/30
Inventor 倪寿清张烁烁张彤高宝玉
Owner SHANDONG UNIV
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