Permeable reactive barrier composite material, and preparation method and applications thereof

A permeable reactive wall and composite material technology, applied in the field of permeable reactive wall composite materials and its preparation, can solve the problems of easily damaged reaction medium, cumbersome installation, and long time consumption, so as to achieve good structural stability, reduce production costs, The effect of improving structural stability

Inactive Publication Date: 2019-09-27
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The in-situ remediation technology is to build a polluted water treatment device underground, which is suitable for preventing groundwater pollution and treating polluted groundwater. However, the installation is cumbersome, the reaction medium is easily damaged, and needs to be replaced regularly; the ex-situ remediation technology needs to pump out the polluted groundwater Treatment, suitable for groundwater that needs to be treated in a short period of time, but there are disadvantages such as high cost, long time consumption, and low efficiency

Method used

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  • Permeable reactive barrier composite material, and preparation method and applications thereof
  • Permeable reactive barrier composite material, and preparation method and applications thereof

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preparation example Construction

[0026] The preparation method of the permeable reactive wall composite material of the present invention comprises the following steps (in the following steps, the amounts of components are all in parts by mass):

[0027] Step 1, weighing 1 to 2 parts of ferric nitrate, and preparing ferric nitrate solution;

[0028] Step 2, adding 10 parts of semi-coke powder to the ferric nitrate solution in step 1, and adding 1 part of ethanol for dispersion to make a mixed solution A;

[0029] In step 3, the mixed solution A in step 2 is sequentially subjected to ultrasonic impregnation, constant temperature oscillation, drying and grinding to make a mixture powder A of ferric nitrate-blue carbon powder;

[0030] Step 4, adding 1 to 4 parts of coal liquefaction residue to the mixture powder A in step 3, and mixing evenly to prepare mixture powder B;

[0031] Step 5, compressing the mixture powder B in step 4 into a cylinder;

[0032] In step 6, the cylinder in step 5 is placed in a tube ...

Embodiment 1

[0035] First crush the semi-coke powder and coal liquefaction residue to 200 mesh for later use. Weigh 1 part of ferric nitrate and prepare ferric nitrate solution; add 10 parts of 200-mesh blue charcoal powder into the ferric nitrate solution, and add 1 part of ethanol to disperse at the same time to prepare mixed solution A. After the mixture A was ultrasonicated for 4 hours, it was placed in a constant temperature oscillator at 40°C, shaken for 1 hour, and then dried in an oven at 105°C for 12 hours, and the dried black powder was ground to 200 mesh to obtain the mixture powder A. 2 parts of 200-mesh coal liquefaction residue and mixture powder A were fully mixed to prepare mixture powder B. The mixture powder B was cold-pressed into a cylinder with a diameter of 7 mm and a height of 10 mm under a pressure of 5 MPa, and 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 ...

Embodiment 2

[0037] First crush the semi-coke powder and coal liquefaction residue to 200 mesh for later use. Weigh 2 parts of ferric nitrate and prepare ferric nitrate solution; add 10 parts of 200-mesh blue charcoal powder into the ferric nitrate solution, and add 1 part of ethanol to disperse at the same time to prepare mixed solution A. After the mixture A was ultrasonicated for 4 hours, it was placed in a constant temperature oscillator at 40°C, shaken for 1 hour, and then dried in an oven at 105°C for 12 hours, and the dried black powder was ground to 200 mesh to obtain the mixture powder A. 2 parts of 200 mesh coal liquefaction residue and mixture powder A were fully mixed to prepare mixture powder B. The mixture powder B was cold-pressed into a cylinder with a diameter of 7 mm and a height of 10 mm under a pressure of 5 MPa, and 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...

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Abstract

The invention discloses a permeable reactive barrier composite material, and a preparation method and applications thereof. According to the preparation method, cheap semi-coke powder is taken as a carbon source, cheap coal liquefaction residue is taken as an adhesive and an oxygen release agent, dipping and nitrate thermal decomposition method are adopted to loading zero-valent iron onto semi-coke powder firmly. According to the preparation method, utilization of a large amount of semi-coke powder and coal liquefaction residue which are difficult to process is adopted, waste is changed into valuables, production cost is reduced, composite material structure stability is reduced, and zero-valent iron loss is reduced. The permeable reactive barrier composite material possesses both oxidation reduction and adsorption functions, is relatively high in structure strength, and excellent in economical performance, and is suitable to be used for treatment of a plurality of kinds of underground water pollution.

Description

technical field [0001] The invention belongs to the technical field of groundwater restoration, and in particular relates to a permeable reactive wall composite material and its preparation method and application. Background technique [0002] my country's groundwater resources are rich in reserves, but in recent years, due to environmental pollution, a large amount of organic matter, high concentrations of nitrogen, phosphorus, and heavy metals have accumulated in the groundwater. 63%, therefore, groundwater restoration work has to arouse our attention. [0003] Currently, groundwater remediation technologies mainly include in-situ remediation technology and ex-situ remediation technology. The in-situ remediation technology is to build a polluted water treatment device underground, which is suitable for preventing groundwater pollution and treating polluted groundwater. However, the installation is cumbersome, the reaction medium is easily damaged, and needs to be replaced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J20/32C02F1/28C02F1/70B09C1/00C02F101/20C02F101/30C02F103/06
CPCB01J20/20B01J20/3007B01J20/3042B01J20/3236B09C1/002C02F1/283C02F1/705C02F2101/20C02F2101/30C02F2103/06C02F2209/08C02F2209/14C02F2209/16
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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