Iron-based biochar sponge composite material as well as preparation method and application thereof

A composite material and biochar technology, applied in chemical instruments and methods, water pollutants, and other chemical processes, to achieve high adsorption efficiency, good impact resistance, and low cost

Active Publication Date: 2021-08-03
YUXI TABACOO COMPANY OF YUNNAN PROVINCE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, in order to control the eutrophication of water bodies, it is an urgent need for those skilled in the art to develop more adsorbents that can efficiently adsorb phosphate in wastewater and realize the purification application in natural flowing water bodies that other biochar powders or particles cannot achieve. question

Method used

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  • Iron-based biochar sponge composite material as well as preparation method and application thereof
  • Iron-based biochar sponge composite material as well as preparation method and application thereof
  • Iron-based biochar sponge composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Dry and grind 16 different biomass raw materials, pass through a 100-mesh sieve, take 10.00g of biomass raw materials and put them into a tube furnace, continuously feed nitrogen, the pyrolysis temperature is 600°C, the heating time is 2h, and the holding time is 2h. After cooling, the original biochar is obtained.

[0043]2. Determination of basic physical and chemical properties of 16 kinds of raw biochar, including elemental analysis, pH, ash content, yield, specific surface area, total porosity, pore size, scanning electron microscope, etc. The results are shown in Table 1 and Table 2, and the scanning electron microscope image of coconut shell silk biochar is as follows: figure 1 shown.

[0044] 3. Add 16 kinds of biochars to the wastewater solution with phosphate ion concentration gradients of 5mg / L, 10mg / L and 20mg / L respectively. Then put it into a shaker to oscillate, adjust the initial pH of the solution to be 7, the adsorption temperature is 25°C, the o...

Embodiment 2

[0056] Preparation of S1 biochar: Crumble coconut shell silk biomass raw materials into small pieces and put them into a tube furnace, continuously feed nitrogen, set the pyrolysis temperature to 600°C, heat up for 2 hours, and hold for 2 hours. Then cool and pass through a 100-mesh sieve to obtain raw biochar.

[0057] S2 modification treatment: fix the volume of ferric chloride hexahydrate to 1mol / L, add the original biochar prepared by S1 into 1mol / L ferric chloride solution and stir at a stirring speed of 180rpm for 12h. After impregnation, filter, put the solid in an oven and dry at 65°C for 12 hours, then put the modified biochar in a tube furnace with nitrogen atmosphere and pyrolyze it at 200°C for 30 minutes, take it out after cooling, and get the iron-based biochar carbon.

[0058] S3 in-situ polymerization: polyvinyl alcohol (1799), that is, the degree of polymerization is 1700, the degree of alcoholysis is 99%, the addition amount is 10g; the mass percentage of fo...

Embodiment 3

[0067] The iron-based biochar-sponge composite material prepared in Example 2 was added to wastewater solutions with phosphate ion concentration gradients of 5 mg / L, 10 mg / L and 20 mg / L, respectively. Then put it into a shaker to shake, adjust the initial pH of the solution to 7, the adsorption temperature to 25° C., the shaking speed to 180 rpm, and the shaking time to 12 hours. In addition, the original coconut shell silk biochar and iron-based modified coconut shell silk biochar were used as controls, and the adsorption experiment of phosphate ions was carried out according to the above method. The comparison results of phosphorus adsorption capacity of different adsorbents are as follows: Figure 4 shown.

[0068] Generally speaking, the phosphorus adsorption capacity of iron-based biochar PVF materials is better than that of iron-based biochar and original biochar. Therefore, by loading iron-based biochar materials on PVF, we have solved the problem to a certain extent. ...

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Abstract

The invention discloses an iron-based biochar sponge composite material as well as a preparation method and application thereof, and belongs to the technical field of sewage treatment. The preparation method comprises the following steps: (1) preparing biochar; (2) conducting modification treatment: soaking the original biochar in a ferric trichloride solution, conducting stirring, carrying out solid-liquid separation, collecting solids, and conducting drying and pyrolyzing to obtain iron-based biochar; and (3) conducting in-situ polymerization: mixing polyvinyl alcohol with water, conducting heating and stirring to obtain an emulsion, then adding the iron-based biochar, uniformly conducting stirring, then adding a foaming agent, then adding a sulfuric acid solution and a formaldehyde solution, uniformly conducting stirring, pouring the stirred system into a mold, and conducting drying and foaming to obtain the iron-based biochar sponge composite material. Biomass waste is adopted as a raw material, so that the method is green and environment-friendly; and the prepared composite material is good in water absorption, corrosion resistance and impact resistance, can be applied to pollution purification of natural flowing water bodies, is high in adsorption efficiency on phosphate radicals in the water bodies, and has potential application value in the field of wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an iron-based biochar sponge composite material and its preparation method and application. Background technique [0002] Phosphorus is a key element in the formation of eutrophication in water bodies. Eutrophication in water bodies leads to the rapid reproduction of algae and other plankton in water bodies, the rapid reduction of dissolved oxygen in water bodies, and the massive death of fish and other aquatic organisms. Eutrophication of water bodies has become a major environmental problem facing the world today. In recent years, the use of adsorption technology to restore eutrophic water bodies has become a hot spot. Metal ions such as iron and aluminum have been widely used as adsorbents because of their low cost and easy handling. [0003] Biochar is a black puffy solid material prepared from biomass waste under high temperature and limited oxygen conditions, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/20B01J20/28045C02F1/283C02F2101/105
Inventor 杨肖娥王港李江舟代快张立猛
Owner YUXI TABACOO COMPANY OF YUNNAN PROVINCE
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