A material for solidifying heavy metals in municipal solid waste incineration fly ash and its preparation method

A technology for municipal solid waste and fly ash incineration, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of little research on fly ash incineration, achieve potential engineering application prospects, and enhance adsorption rate , Improve the effect of dispersion characteristics

Active Publication Date: 2019-06-28
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the research on graphyne at home and abroad is mainly concentrated in the fields of energy storage materials, piezoelectric materials and catalytic reduction materials, while there is little research on the solidification and treatment of municipal solid waste incineration fly ash.

Method used

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  • A material for solidifying heavy metals in municipal solid waste incineration fly ash and its preparation method

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Effect test

Embodiment 1

[0030] The raw materials and properties of the fly ash solidified body of a municipal solid waste incineration plant are as follows:

[0031] Portland cement: P·I 42.5 Portland cement, produced by Onoda Cement Plant, 28-day compressive strength 50.7MPa, 28-day flexural strength 8.6MPa.

[0032] Municipal solid waste incineration fly ash: Municipal solid waste incineration fly ash, in powder form, with a particle size of 1 to 200 microns.

[0033] Dispersant: polyoxyethylene nonylphenyl ether, produced by Sigma-Aldrich Chemical Reagent Company of the United States, white waxy solid.

[0034] Graphdiyne: prepared in the school laboratory, in powder form, with a particle size of 200 nanometers to 1 micron.

[0035] Mixing water: Dalian tap water.

[0036] The preparation steps are as follows:

[0037] Using polyoxyethylene nonylphenyl ether as a dispersant, change 20% of the mixing water into hot water and add it to a beaker with a capacity of 1000mL to dissolve the dispersant...

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Abstract

The invention belongs to the field of solid-waste environmental protection ecological materials and provides a material for solidifying a heavy metal in the incineration fly ash of a municipal solid waste and a preparation method of the material. The material is a graphdiyne based novel cement-based material and comprises the following raw materials: 200-800 parts of Portland cement, 200-800 partsof fly ash, 10-25 parts of a dispersing agent, 2-5 parts of graphdiyne, and 250-350 parts of mixing water. The material not only has an excellent mechanical property, but also effectively solidifiesthe harmful heavy metal in the incineration fly ash of the municipal solid waste, obviously reduces the permeability of the heavy metal ion in the fly ash, is stable and efficient, and is favorable for realizing the reutilization of the resource of the incineration fly ash; in addition, the material is doped with no chemical stabilizer, the used materials are non-toxic and harmless as well as green and environmentally friendly, the operation process is simple and convenient, and huge solidifying cost is reduced.

Description

technical field [0001] The invention belongs to the field of solid waste environmental protection ecological materials, and designs a solidification technology for heavy metal ions in municipal solid waste incineration fly ash, in particular to a graphyne-based cement-based material for solidifying heavy metal ions in municipal solid waste incineration fly ash and its Preparation. Background technique [0002] In recent years, with the continuous improvement of people's living standards in our country and the rapid development of urbanization, the discharge of municipal solid waste is increasing day by day, and the rapid development of waste incineration treatment has led to an increasing output of incineration fly ash, which accounts for approximately 3% to 5% of that. Municipal solid waste incineration fly ash contains mercury (Hg), cadmium (Cd), zinc (Zn), copper (Cu) and other heavy metals, and also contains a small amount of organic pollutants such as dioxins and furan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/08
CPCC04B18/08C04B28/04C04B2111/00767C04B2201/50C04B24/32C04B14/024C04B22/002Y02W30/91
Inventor 王宝民范程程
Owner DALIAN UNIV OF TECH
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