Room-temperature preparation method of iron carbon particles as well as application of iron carbon particles

An iron-carbon and particle technology, which is applied to the field of room temperature preparation of iron-carbon particles, can solve the problems of the destruction of the structure and performance of the hydrothermal biomass carbon, and the difficulty in using the hydrothermal biomass carbon, so as to reduce the preparation cost, save the energy consumption, The effect of strong activation ability

Inactive Publication Date: 2019-10-15
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrothermal biochar can be used as a substitute for activated carbon, but it is difficult to use hydrothermal biochar as a carbon source by the high-temperature granulation method commonly used today
Because high-temperature granulation needs to be carried out at a temperature above 1000°C, too high a temperature will damage the structure and properties of hydrothermal biochar

Method used

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  • Room-temperature preparation method of iron carbon particles as well as application of iron carbon particles
  • Room-temperature preparation method of iron carbon particles as well as application of iron carbon particles
  • Room-temperature preparation method of iron carbon particles as well as application of iron carbon particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Using iron filings, rice husks and sodium alginate as raw materials to prepare coated iron-carbon particles comprises the following steps:

[0023] (1) After crushing and sieving the rice husk to make the particle size ≤ 1mm, put it into the reaction kettle and heat it at 180°C for 6h, and the heating rate is 1°C / min;

[0024] (2) Fully mix iron filings, 2 / 3 biochar and 1 / 6 sodium alginate in 100ml deionized water with a mass ratio of 1 / 6;

[0025] (3) Add the mixture dropwise to 1% (w / v) CaCl via syringe 2 In, the drop rate is 1mL / min;

[0026] (4) After forming spherical iron-carbon particles, soak the iron-carbon particles in the crosslinking agent for 4h;

[0027] (5) The iron-carbon particles soaked in (4) were washed with deionized water, and vacuum-dried at 40° C. for 24 hours to finally obtain iron-carbon particle materials.

Embodiment 2

[0029] Using iron filings, rice husks and sodium alginate as raw materials to prepare coated iron-carbon particles comprises the following steps:

[0030] (1) After crushing and sieving the rice husk to make the particle size ≤ 1mm, put it into the reaction kettle and heat it at 200°C for 8h, and the heating rate is 5°C / min;

[0031] (2) Fully mix iron filings, 1 / 3 biochar and 1 / 3 sodium alginate in 100ml deionized water with a mass ratio of 1 / 3;

[0032] (3) Add the mixture dropwise to 2% (w / v) CaCl via syringe 2 In, the drop rate is 5mL / min;

[0033] (4) After forming spherical iron-carbon particles, soak the iron-carbon particles in the crosslinking agent for 10h;

[0034] (5) The iron-carbon particles soaked in (4) were washed with deionized water, and vacuum-dried at 50° C. for 48 hours to finally obtain iron-carbon particle materials.

Embodiment 3

[0036] Using iron filings, rice husks and sodium alginate as raw materials to prepare coated iron-carbon particles comprises the following steps:

[0037] (1) After crushing and sieving the rice husk to make the particle size ≤ 1mm, put it into the reaction kettle and heat it at 220°C for 10h, and the heating rate is 10°C / min;

[0038] (2) Fully mix iron filings, 1 / 6 biochar and 1 / 6 sodium alginate in 100ml deionized water with a mass ratio of 2 / 3;

[0039] (3) Add the mixture dropwise to 2.5% (w / v) CaCl via syringe 2 In, the drop rate is 7mL / min;

[0040] (4) After forming spherical iron-carbon particles, soak the iron-carbon particles in the crosslinking agent for 12h;

[0041] (5) The iron-carbon particles soaked in (4) were washed with deionized water, and vacuum-dried at 60° C. for 60 hours to finally obtain iron-carbon particle materials.

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Abstract

The invention belongs to the field of water treatment and particularly relates to a room-temperature preparation method of iron carbon particles as well as application of the iron carbon particles. The method particularly comprises the following steps: pulverizing and sieving agricultural and forest waste, putting the waste into a reaction kettle, and heating and carbonizing to prepare hydrothermal biomass charcoal; completely mixing iron scrap, biomass charcoal and sodium alginate into deionized water; adding the mixture into a crosslinking agent dropwise by an injector to form spherical ironcarbon particles; soaking the iron carbon particles in the crosslinking agent for a certain time; and washing the soaked iron carbon particles with deionized water and drying under the vacuum condition to finally obtain the iron carbon particle material. Coated iron carbon particle activated persulfate is used for treating organic pollutants in waste water, so that the organic pollutants in the waste water can be effectively removed. Taking ibuprofen as an example, the removal rate can reach to 92.45 percent. The coated iron carbon particle material with high property can be prepared. Resource utilization of waste is realized, and good economic and environmental benefits are achieved.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method for preparing iron-carbon particles at room temperature and an application thereof. Background technique [0002] Persulfate oxidation technology is based on SO 4 ·- new oxidation technology. In recent years, SO 4 ·- The application of new advanced oxidation technology mainly in the field of leachate treatment is more and more extensive. Under certain conditions, SO 4 ·- The ability to oxidize pollutants is better than that of ·OH. Because, compared with OH, SO 4 ·- It has a longer half-life, is more difficult to be quenched by ions in water and is not selective for species oxidation, so that SO 4 ·- Can oxidize and OH cannot oxidize organic matter. In the actual application process, a large amount of OH and SO can be produced after activation of persulfate 4 ·- , common activation materials include nanometer zero-valent iron, iron-containing ore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467C02F101/30
CPCC02F1/4672C02F2101/30
Inventor 裴元生于大洋
Owner BEIJING NORMAL UNIVERSITY
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