Preparation of Ni<2+> doped geopolymer catalyst and its application in organic matter degradation

A technology of geopolymers and polymers, applied in catalyst activation/preparation, physical/chemical process catalysts, water pollutants, etc., can solve the problems of no reports on the application of fly ash, slag and steel slag geopolymer catalysts. , to avoid ultraviolet or visible light irradiation, the process is simple and easy to implement, and the industry is simple and easy to implement.

Inactive Publication Date: 2012-05-02
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] By consulting a large number of patents and literature, there is no report on the use of fly ash,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Accurately take by weighing 900g of fly ash raw material, take this as the basis of measurement (100%), adopt external mixing method, the dosage of chemical activator sodium silicate is 11% of fly ash weight, water and fly ash mass ratio ( Also known as water-cement ratio) is 0.32. Pour the fly ash raw material into the double-rotation and double-speed slurry mixer for stirring and dispersing; add the sodium silicate aqueous solution and stir at a high speed to form a uniformly mixed slurry; put the slurry into a triplex of 50mm×31.5mm×31.5mm In the mold, vibrate on the rubber sand vibrating table, and scrape it flat with a scraper to obtain a formed slurry test block. Put the formed test blocks into a standard curing box for 1 day of curing. After demoulding, put the test blocks into the curing room for curing for 28 days respectively to obtain fly ash-based geopolymers.

[0055] Accurately weigh 10 g of fly ash-based geopolymer, pour 100 mL of NH with a concentration...

Embodiment 2

[0058] All operation steps are identical with embodiment 1, just change fly ash into slag, water and slag mass ratio (also claiming water-cement ratio) is 0.30; Finally obtain Ni 2+ Doped slag geopolymer catalyst.

Embodiment 3

[0060] All operation steps are identical with embodiment 1, just change fly ash into steel slag, water and steel slag mass ratio (also claiming water-cement ratio) is 0.28; Finally obtain Ni 2+ Doped steel slag geopolymer catalyst.

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PUM

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Abstract

The invention discloses preparation of a Ni<2+> doped geopolymer catalyst and application of the catalyst in organic matter degradation. The preparation method utilizes industrial solid waste fly ash or mineral slag or steel slag as the raw material, which, excited by a chemical exciting agent sodium silicate, can generate a fly ash or mineral slag or steel slag based geopolymer respectively. Then through NH4<+> and Ni<2+> ion exchange reactions in order, a Ni<2+> doped geopolymer catalyst can be generated. The catalyst can be used for degradation reaction of methylene blue in industrial wastewater and has a degradation rate up to 77.29%. The preparation and organic matter degradation processes have the advantages of simplicity and practicability, no need for heating, energy saving and environmental protection, thus being able to realize large scale preparation and application.

Description

technical field [0001] The invention belongs to the preparation of inorganic catalyst materials and their application in the field of waste water treatment, in particular to the preparation of fly ash, slag and steel slag geopolymer catalysts and their application in photocatalytic degradation of organic matter. Background technique [0002] One way of resource utilization of industrial solid wastes such as fly ash, slag and steel slag is to use them as adsorbents to remove environmental pollution, especially for wastewater treatment. Fly ash and slag can be used to treat heavy metal wastewater [1，2] , papermaking and printing and dyeing wastewater [3] , phosphorous, nitrogen, and parafluorine-containing wastewater [4-6] and organic degradation [7] ;Steel slag is also commonly used in wastewater treatment [8] ; At the same time, there are also fly ash modified [9] and reports for heterogeneous catalysis [10] . Xue Xiangxin and others [11-13] The invention patent repo...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J27/055B01J37/30C02F1/30C02F101/38
Inventor 张耀君刘礼才徐德龙王亚超徐勇王晶
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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