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Adsorption-type permeable reaction barrier composite material and preparation method and application thereof

A permeable reactive wall and composite material technology, applied in the field of adsorption-type permeable reactive wall composite material and its preparation, can solve the problems of high material cost, poor structural stability, easy breakage, etc., and achieve high chemical stability and low cost , the effect of reducing the amount of use

Inactive Publication Date: 2019-09-17
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the reaction medium of the permeable reaction wall, activated carbon and its improved products show high activity for the removal of organic pollutants such as benzene, phenol, quinone, etc. However, the use of activated carbon as the reaction medium has high material cost and poor structural stability. , fragile and other defects

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  • Adsorption-type permeable reaction barrier composite material and preparation method and application thereof
  • Adsorption-type permeable reaction barrier composite material and preparation method and application thereof
  • Adsorption-type permeable reaction barrier composite material and preparation method and application thereof

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preparation example Construction

[0026] The preparation method of the adsorption type permeable reactive wall composite material of the present invention comprises the following steps:

[0027] Step 1, adding the coal liquefaction residue and the oxygen release agent into a container containing semi-coke powder in sequence, and mixing them uniformly to obtain a mixture A; in the mixture A, the content of the coal liquefaction residue is 10% to 30% by mass percentage, The content of oxygen release agent is 2%-5%, the content of semi-coke powder is 65%-88%, the particle size of coal liquefaction residue is 100-300 mesh, and the particle size of semi-coke powder is 100-300 mesh; In terms of parts, its components include 2 to 4 parts of CaO 2 , 1 to 2 parts of MgO 2 and 0.5 parts of Fe 2 o 4 ;

[0028] Step 2, the mixture A prepared in step 1 is pressed into several cylinders with a diameter of 5-10 mm and a height of 8-15 mm through a mold under a pressure of 3-5 MPa;

[0029] Step 3, place the cylinder pre...

Embodiment 1

[0035] First crush the semi-coke powder and coal liquefaction residue to 200 mesh for later use, then weigh 2 parts of CaO 2 , 1 part of MgO 2 and 0.5 parts of Fe 2 o 4 , mixed evenly, and made into an oxygen release agent for later use. Weigh 10g of coal liquefaction residue (200 mesh) and 2g of oxygen release agent respectively, add them in turn to a beaker containing 88g of blue charcoal powder (200 mesh), and mix well. The mixture was cold-pressed into cylinders with a diameter of 7 mm and a height of 10 mm under a pressure of 5 MPa, and each cylinder had a mass of 0.6 g. Put the cylinder in the tube furnace, set the heating rate at 20°C / s, the final temperature of physical activation at 900°C, the constant temperature time of 120min, CO 2 The gas flow rate is 300mL / min, and the adsorption type permeable reactive wall composite material of the present invention is prepared. The compressive strength of the prepared cylindrical composite material is 4.25MPa, and the iod...

Embodiment 2

[0037] First crush the semi-coke powder and coal liquefaction residue to 200 mesh for later use, then weigh 2 parts of CaO 2 , 1 part of MgO 2 and 0.5 parts of Fe 2 o 4 , mixed evenly, and made into an oxygen release agent for later use. Weigh 20g of coal liquefaction residue (200 mesh) and 4g of oxygen release agent respectively, add them in turn to a beaker containing 76g of blue charcoal powder (200 mesh), and mix well. The mixture was cold-pressed into cylinders with a diameter of 7 mm and a height of 10 mm under a pressure of 5 MPa, and each cylinder had a mass of 0.6 g. Put the cylinder in the tube furnace, set the heating rate at 20°C / s, the final temperature of physical activation at 900°C, the constant temperature time of 120min, CO 2The gas flow rate is 300mL / min, and the adsorption type permeable reaction wall composite material of the present invention is prepared. The compressive strength of the prepared cylindrical composite material is 5.51 MPa, and the iod...

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Abstract

The invention discloses an adsorption-type permeable reaction barrier composite material and a preparation method and application thereof. The composite material is prepared by press molding and high temperature physical activation treatment by using blue carbon powder with high specific surface area and porosity as a main material, using coal liquefaction residue with high adhesion as a binder, and using an oxygen releasing agent. Compared with an activated carbon material, the composite material has the advantages of high structural strength, low economic cost, high chemical stability and the like, and can be applied to treat contaminated groundwater with high organic matter content and high heavy metal ion content caused by occasions such as garbage disposal sites, mine yards, and solid waste landfills.

Description

technical field [0001] The invention belongs to the technical field of groundwater restoration, and in particular relates to an adsorption type permeable reactive wall composite material and its preparation method and application. Background technique [0002] Groundwater resources are one of the indispensable resources in industrial and agricultural production. However, with the excessive use of pesticides and fertilizers, unreasonable landfill of polluted waste, and improper treatment of industrial wastewater and urban sewage, groundwater resources have been seriously damaged. , and changed from single pollution to mixed pollution, resulting in more and more complicated groundwater pollution and more and more difficult treatment. Among many groundwater pollution control technologies, permeable reaction barrier (Permeable Reaction Barrier, PRB) technology has attracted more researchers' attention because of its advantages of high efficiency, low cost, easy installation, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/42C02F103/06C02F101/16C02F101/20C02F101/30C02F101/32C02F101/38
CPCB01J20/041B01J20/06B01J20/20B01J20/28011B01J20/3042C02F1/288C02F1/42C02F2101/16C02F2101/20C02F2101/30C02F2101/327C02F2101/38C02F2103/06
Inventor 周军吴雷周晶晶梁坤刘长波岳昌盛苏婷呼书迪
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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