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Method for preparing geopolymer photocatalyst from municipal solid waste incineration fly ash

A technology for municipal solid waste and geopolymers, applied in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve problems such as difficult synchronous removal, restrictions on commercialization of photocatalytic technology, etc., to achieve preparation The effect of simple process and wide source of preparation raw materials

Pending Publication Date: 2020-08-25
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current photocatalysts have high requirements on the quality of catalyst raw materials, which limits the commercialization of photocatalytic technology.
At the same time, for waste liquids containing heavy metal pollutants, organic pollutants and other pollutants, it is difficult to achieve simultaneous removal using current photocatalysts

Method used

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  • Method for preparing geopolymer photocatalyst from municipal solid waste incineration fly ash
  • Method for preparing geopolymer photocatalyst from municipal solid waste incineration fly ash
  • Method for preparing geopolymer photocatalyst from municipal solid waste incineration fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Influence of the Mass Ratio of Graphite Powder and Municipal Solid Waste Incineration Fly Ash on the Performance of the Prepared Geopolymer Photocatalyst

[0029] According to the mass ratio of graphite powder to municipal solid waste incineration fly ash 2.5:100, 3:100, 4:100, 5:100, 10:100, 15:100, 16:100, 17:100, 17.5:100 Graphite powder and municipal solid waste incineration fly ash are mixed to obtain nine groups of carbon-doped municipal solid waste incineration fly ash. According to the mass ratio of silica fume and aluminum ash of 1:1, respectively weigh silica fume and aluminum ash, and mix them to obtain a silica-alumina additive. Weigh molybdenite powder, silicon-aluminum additive, carbon-doped municipal solid waste incineration fly ash respectively according to the mass ratio of molybdenite powder, silicon-aluminum additive, and carbon-doped municipal solid waste incineration fly ash 2: 20: 100, and mix to obtain nine group of catalyst precursor m...

Embodiment 2

[0043] Embodiment 2 Silica fume and aluminum ash mass ratio influence on the performance of the prepared geopolymer photocatalyst

[0044] According to the mass ratio of graphite powder and municipal solid waste incineration fly ash of 15:100, graphite powder and municipal solid waste incineration fly ash were weighed and mixed to obtain carbon-doped municipal solid waste incineration fly ash. Weigh silica fume and aluminum respectively according to the mass ratio of silica fume to aluminum dust: 0.5:1, 0.7:1, 0.9:1, 1:1, 2:1, 3:1, 3.2:1, 3.4:1, 3.5:1 Ash, mixed to get nine groups of silicon-aluminum additives. Weigh molybdenite powder, silicon-aluminum additive, carbon-doped municipal solid waste incineration fly ash respectively according to the mass ratio of molybdenite powder, silicon-aluminum additive, and carbon-doped municipal solid waste incineration fly ash 3: 30: 100, and mix to obtain nine group of catalyst precursor materials. According to the liquid-solid ratio ...

Embodiment 3

[0049] Example 3 Influence of molybdenite powder, silicon-aluminum additive, and carbon-doped municipal solid waste incineration fly ash mass ratio on the performance of the prepared geopolymer photocatalyst

[0050] According to the mass ratio of graphite powder and municipal solid waste incineration fly ash of 15:100, graphite powder and municipal solid waste incineration fly ash were weighed and mixed to obtain carbon-doped municipal solid waste incineration fly ash. According to the mass ratio of silica fume and aluminum ash of 3:1, respectively weigh silica fume and aluminum ash and mix them to obtain a silica-alumina additive. According to the mass ratio of molybdenite powder, silicon-aluminum additive, and carbon-doped municipal solid waste incineration fly ash 2:5:100, 2:10:100, 2:15:100, 0.5:20:100, 1:20:100, 1.5:20:100, 2:20:100, 3:20:100, 4:20:100, 2:30:100, 3:30:100, 4:30:100, 2:40:100, 3: 40:100, 4:40:100, 4.5:40:100, 5:40:100, 5.5:40:100, 4:45:100, 4:50:100, 4:5...

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Abstract

The invention discloses a method for preparing a geopolymer photocatalyst from municipal solid waste incineration fly ash. The method comprises the following steps of: weighing graphite powder and municipal solid waste incineration fly ash, and mixing the graphite powder and the municipal solid waste incineration fly ash to obtain carbon-doped municipal solid waste incineration fly ash; weighing silica fume and aluminum ash, and mixing the silica fume and aluminum ash to obtain a silica-alumina additive; weighing molybdenite powder, the silicon-aluminum additive and the carbon-doped municipalsolid waste incineration fly ash, and mixing the molybdenite powder, the silicon-aluminum additive and the carbon-doped municipal solid waste incineration fly ash to obtain a catalyst precursor material; weighing water and the catalyst precursor material, and performing low-temperature plasma irradiation to obtain photocatalyst slurry; and drying and grinding the photocatalyst slurry to obtain thegeopolymer photocatalyst. The invention also discloses a geopolymer photocatalyst and application thereof. According to the method, the stabilization of heavy metal and the mineralization of dioxin in the fly ash can be achieved, and part of the heavy metal can be converted into a semiconductor material. A molybdenum source and a carbon source are a low-value molybdenite raw material and graphitepowder respectively. The geopolymer photocatalyst can remove 98% of COD, 99% of heavy metal pollutants, 99% of ammonia nitrogen and 98% of total phosphorus at most.

Description

technical field [0001] The invention relates to the technical field of harmless disposal and resource utilization of municipal solid waste incineration fly ash, in particular to a method for preparing a geopolymer photocatalyst by using municipal solid waste incineration fly ash. Background technique [0002] Discharge of dye wastewater into the environment without proper treatment poses a potential threat to ecosystems and human health. The current treatment methods for dye wastewater include adsorption, enzyme treatment, membrane separation, and photocatalytic degradation. Among them, photocatalytic degradation is favored due to its high efficiency and environmental friendliness. In the process of photocatalysis, when the semiconductor composite material (photocatalyst) is irradiated with light, some strong active free radicals are generated on the surface of the material, and these active free radicals can degrade the macromolecules of organic dyes in the solution into n...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J37/04B01J37/34B01J37/08C02F1/72C02F1/32C02F101/10C02F101/16C02F101/20C02F101/30C02F103/06
CPCB01J27/19B01J37/04B01J37/349B01J37/08B01J37/0036C02F1/725C02F1/32C02F2103/06C02F2101/30C02F2101/20C02F2101/16C02F2101/105B01J35/39
Inventor 黄涛金俊勋仲小艺徐颖宋东平张树文刘龙飞周璐璐
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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