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Preparing method and application of load type environment-friendly iron-aluminum alloy

An iron-aluminum alloy and load-type technology, which is applied in the field of preparation of load-type iron-aluminum alloys, can solve the problems of secondary pollution, pollution, entry into the soil environment, etc., to reduce the generation of polluting wastes, the process is simple and reliable, and the application is expanded. range effect

Inactive Publication Date: 2016-11-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption efficiency of the adsorption method is generally low, and the price is expensive, and the service life is short; the cost of the electrolysis method is high and the waste water cannot be recycled; the problem with the membrane separation method is that the quality of the membrane needs to be improved, it is not easy to degrade, and can cause secondary pollution
In the bimetallic system, metals compounded with zero-valent iron are generally more expensive, and the cost in the repair process is higher, and Pd, Cu, and Ni may enter the soil environment and cause new pollution problems

Method used

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  • Preparing method and application of load type environment-friendly iron-aluminum alloy
  • Preparing method and application of load type environment-friendly iron-aluminum alloy
  • Preparing method and application of load type environment-friendly iron-aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. Take a certain amount of aluminum powder with a particle size of 25 microns, put it in a deoxygenated water beaker containing 5% aluminum special cleaning agent, put the beaker into an ultrasonic cleaning tank with a water temperature of 60°C for 15 minutes, and remove the surface of the aluminum powder Oil stains, oxides, etc., were filtered under nitrogen protection, rinsed with absolute ethanol several times, and dried in a vacuum oven for use.

[0023] b. Prepare 200ml of 0.1mol / L acetic acid solution in a three-necked beaker, heat it to 70°C, put 10g of the above-mentioned dried aluminum powder under stirring conditions, and react for a period of time to form a hydrogen reducing atmosphere.

[0024] c. Heat and dissolve the PASP gel with a molecular weight of 15,000-20,000 in pure water to prepare a PASP solution with a mass fraction of 0.01%, mix it with a mass concentration of 60g / L ferrous chloride solution, and set the volume to 100ml , to obtain a mixed sol...

Embodiment 2

[0027] Cr 6+ removal rate test. Get 0.2g of the material and add it to 100ml of simulated Cr 6+ In the heavy metal polluted wastewater with a concentration of 50mg / L, divide it into three groups of parallel experiments, put it into a constant temperature shaking box at 35°C for reaction, and take samples at regular intervals to measure Cr in the water body. 6+ Concentration, to get the Cr of the material 6+ Remove curves. Replace the loaded iron-aluminum alloy with zero-valent iron and carry out the experiment according to the above steps to obtain the Cr of zero-valent iron 6+ Remove the curve and compare the two, the result is as follows figure 2 shown. from figure 2 It can be seen that: the material prepared by the present invention has a higher removal rate in a shorter time than pure zero-valent iron, and the reaction is rapid.

Embodiment 3

[0029] The iron-aluminum alloy prepared by the present invention is tested for the removal rate of nitrate. Take 0.2g of the material and add it to 100ml of heavy metal-contaminated wastewater with a simulated nitrate concentration of 100mg / L, divide it into three groups of parallel experiments, put it into a constant temperature oscillation box at 35°C for reaction, and take samples at regular intervals to measure the water body The nitrate removal curve of the material was obtained at the middle nitrate concentration. Replace the iron-aluminum alloy with zero-valent iron to carry out the experiment according to the above steps, and obtain the nitrate removal curve of zero-valent iron. The two are compared, and the results are as follows image 3 shown. from image 3 It can be seen that the material prepared by the present invention has a higher removal rate than single zero-valent iron.

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Abstract

The invention relates to the preparation and application field of a loaded environment-friendly iron-aluminum alloy, in particular to a preparation method of a loaded iron-aluminum alloy used for removing pollutants in water bodies. It is characterized in that the load-type environment-friendly iron-aluminum alloy of the present invention uses elemental aluminum as a carrier, carries out the loading of zero-valent iron through the hydrogen reduction atmosphere formed by elemental aluminum and acetic acid and its own replacement, and utilizes polyaspartic acid in the iron-aluminum alloy A protective layer is formed on the surface to prevent oxidation. This protective layer has high environmental compatibility, and its decomposition in the environment will not cause secondary pollution. It can minimize the generation of polluting waste in the process of preparation and application, and avoid the phenomenon of pollution without treatment. Through the galvanic effect of iron and aluminum, the prepared iron-aluminum alloy not only improves its remediation efficiency for pollutants, but also avoids various problems in the remediation of pollutants by zero-valent iron alone, and actively responds to China's green development The requirements are conducive to the further promotion of the application of iron and aluminum alloys.

Description

technical field [0001] The invention relates to the preparation and application field of a loaded environment-friendly iron-aluminum alloy, in particular to a preparation method of a loaded iron-aluminum alloy used for removing pollutants in water bodies. Background technique [0002] With the development of modern industrialization, water pollution caused by pollutant discharge has attracted more and more attention. According to the monitoring data of the Ministry of Environmental Protection, the daily discharge of industrial and domestic sewage in the country is nearly 200 million tons, making urban rivers full of pollution types, including: organic pollution , heavy metal pollution, acid-base pollution, virus and bacteria pollution, etc. 60% to 70% of the total water shortage in southern cities is caused by water pollution; more than 10,000 kilometers of urban river sections across the country have lost the most basic use functions of Class V water; ecosystems have degrad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/26B22F1/00C02F1/46C02F101/22
CPCB22F9/26B22F1/0003C02F1/46C02F2101/163C02F2101/22
Inventor 林爱军徐从斌李姝谚焦春磊邹德勋
Owner BEIJING UNIV OF CHEM TECH
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