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Preparation method of reed-based biochar adsorption material

A technology of adsorption material and biochar, which is applied in the field of environmental engineering, can solve problems such as environmental pollution and waste of resources, and achieve the effects of shortening reaction time, reducing emissions, and improving the value of recycling

Inactive Publication Date: 2018-12-11
SHENYANG ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing reed-based biochar adsorption materials that overcomes the shortcomings of the existing modified biochar prepared from reed straws, which not only solves the problem of environmental pollution caused by the random treatment and disposal of wetland plant waste, resource The problem of waste, and compared with the existing technology, the prepared product has a high specific surface area and strong adsorption capacity for pollutants, the environmental protection value of the product is greatly improved, and the resource utilization of waste is fully realized

Method used

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  • Preparation method of reed-based biochar adsorption material
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  • Preparation method of reed-based biochar adsorption material

Examples

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Embodiment 1

[0035] A preparation method of a reed-based biochar adsorption material, specifically:

[0036] Step 1: washing, drying and pulverizing the reed straw, which is obtained from wetland reed waste, and the size of the obtained crushed reed straw is 50-100 mesh.

[0037] Step 2, immerse the crushed reed straw in the KOH solution for activation treatment, and then perform drying treatment, wherein the mass concentration of the KOH solution is 1000 kg / m³, and the mass ratio of KOH and reed straw contained in the solution is 2:1 , alkalization time is 12 h.

[0038] Step 3, put the dried reed straw crushed material into the atmosphere furnace, and carry out anaerobic high-temperature cracking under the protection of nitrogen, specifically:

[0039] ① Before heating up, feed N into the atmosphere furnace 2 30 min.

[0040] ② In continuous access to N 2 Warming up under the conditions of:

[0041] a. Within 10 minutes, the temperature in the furnace is raised from room temperatur...

Embodiment 2

[0048] A method for preparing a reed-based biochar adsorption material. After the reed straw is cleaned, dried, crushed, immersed in an activation solution for activation treatment, and dried, it is placed in an atmosphere furnace, and is pyrolyzed under the protection of an inert gas argon, and then cooled. to room temperature, and then wash the cracked material to neutrality, and the obtained product is a reed-based biochar adsorption material.

[0049] In this example, the activation solution used is still KOH solution with a mass concentration of 1000 kg / m³, the mass ratio of KOH to reed straw is 3:1, and the activation treatment time is 12 h. When cleaning the carbonized straw, a 10% HCl solution by volume is used.

[0050] The pyrolysis process is specifically:

[0051] ① Before heating up, pass inert gas into the furnace for 30 minutes.

[0052] ② Heating under the condition of continuously feeding inert gas:

[0053] a. Within 10 minutes, the temperature in the furn...

Embodiment 3

[0060] A method for preparing a reed-based biochar adsorption material, comprising cleaning, drying, pulverizing and immersing reed straw in an activation solution for activation and drying, putting it into an atmosphere furnace, cracking it at a high temperature under the protection of nitrogen, and then cooling it to room temperature. Then, the cracked material is cleaned to neutrality, and the obtained product is a reed-based biochar adsorption material.

[0061] In this example, the activation solution used is still KOH solution, the mass concentration is 1000 kg / m³, the mass ratio of KOH to reed straw is 4:1, and the activation treatment time is 12 h. When cleaning the carbonized straw, an HCl solution with a concentration of 8% by volume is used.

[0062] The pyrolysis process is specifically:

[0063] ① Before heating up, feed N into the furnace 2 30 min.

[0064] ② In continuous access to N 2 Warming up under the conditions of:

[0065] a. Within 10 minutes, the ...

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Abstract

The invention relates to a preparation method of a reed-based biochar adsorption material. The preparation method is technically characterized by comprising the following steps of cleaning the reed stalk, drying and crushing; soaking the crushed reed stalk into a KOH (potassium hydroxide) solution to activate, and drying; putting the dried crushed reed stalk into an atmosphere furnace, and performing oxygen-free high-temperature cracking under the nitrogen or inert gas protection atmosphere; after high-temperature cracking treatment, cooling to room temperature, and cleaning the cracked material to be neutral by an acid solution, so as to prepare the reed-based biochar adsorption material. The preparation method has the advantages that the problems of pollution to environment and waste ofresources due to irresponsible disposal of the wetland plant wastes are solved; compared with the prior art, the specific surface area is large, the pollutant adsorption ability is strong, the environment-friendly value is greatly increased, and the resource utilization of the wastes is realized.

Description

technical field [0001] The invention relates to the field of environmental engineering, in particular to a preparation method of a reed-based biochar adsorption material. Background technique [0002] Constructed wetland is a sewage treatment ecological engineering technology developed on the basis of natural wetland to degrade sewage. In recent years, constructed wetlands have developed rapidly in my country, effectively improving the water environment quality of regions and river basins. As of 2014, the total wetland area in my country was 53.6026 million hectares, of which the constructed wetland area was 6.7459 million hectares. As my country's requirements for improving the quality of the water environment become increasingly stringent, and people's desire for a better environment continues to increase, the construction area of ​​constructed wetlands will continue to increase. [0003] As the main wetland plant, reed is an important part of constructed wetland. First...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01J20/20B01J20/28054B01J2220/485
Inventor 李子音赵传起张华张帆陈晓东许翼孙莹邵冰
Owner SHENYANG ACAD OF ENVIRONMENTAL SCI
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