Preparation of red mud-based polymer catalyst and application of catalyst in organic dye degradation

A polymer and red mud-based technology, applied in the direction of physical/chemical process catalysts, water pollutants, chemical instruments and methods, etc., can solve problems such as energy consumption and secondary pollution, and achieve no discharge of three wastes and no secondary pollution , the effect of easing degradation conditions

Inactive Publication Date: 2014-01-29
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The third is to acidify the red mud [37，38] and to prepare the adsorbent by precipitation [37，38，15-21] , but when the adsorbent reaches saturated adsorption, acid treatment or high temperature treatment is required to regenerate the adsorbent, which not only consumes energ

Method used

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  • Preparation of red mud-based polymer catalyst and application of catalyst in organic dye degradation
  • Preparation of red mud-based polymer catalyst and application of catalyst in organic dye degradation
  • Preparation of red mud-based polymer catalyst and application of catalyst in organic dye degradation

Examples

Experimental program
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Effect test

Embodiment 1

[0082] Accurately weigh 900 grams of Guangxi Bayer red mud (hereinafter referred to as red mud) as the basis of measurement (100%); adopt the external mixing method, and the amount of sodium silicate is 18% of the weight of red mud; water and red mud The mass ratio was 0.3.

[0083] Sodium silicate is dissolved in water to form an aqueous solution at room temperature. Pour the sodium silicate aqueous solution into a double-rotation and double-speed slurry mixer, then add red mud for high-speed stirring to form a uniform slurry, put the slurry into a 30mm×30mm×40mm iron triple mold, and put it in the glue Vibrate on the sand vibrating table, and scrape it with a scraper to get the formed red mud-based polymer. Put the formed red mud-based polymer (specimen) into a plastic film sealed bag, heat it at 85°C for 20 hours, and then release it from the mold, and then maintain it for 3 days under standard curing conditions. The compressive strength is 10.8MPa.

[0084] Then crush a...

Embodiment 2

[0086] All the operation steps are the same as in Example 1, except that the amount of sodium silicate is 20% of the weight of the red mud, and they are respectively cured for 3 days under standard curing conditions. The compressive strength of the red mud-based polymer is 17MPa as measured by a compression tester.

Embodiment 3

[0088] All the operation steps are the same as in Example 1, except that the dosage of sodium silicate is 23% of the weight of the red mud, and they are respectively cured for 3 days under standard curing conditions, and the compressive strength of the red mud-based polymer is 7.5 MPa measured by an anti-compression instrument .

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Abstract

The invention discloses a preparation of a red mud-based polymer catalyst and an application of the catalyst in organic dye degradation. A preparation method respectively takes industrial solid waste red mud of different producing areas as raw materials to prepare the red mud-based polymer catalyst under the excitation of sodium silicate, and the preparation of the red mud-based polymer catalyst has the advantages that the red mud raw materials can be completely utilized and no three wastes are discharged. The red mud-based polymer catalyst is applied to the degradation reaction of an indigo dye wastewater solution under ultraviolet irradiation, the degradation rate of the red mud-based polymer catalyst reaches 100%, the degradation efficiency is high, dye molecules are completely degraded into CO2 and H2O, secondary pollution cannot be generated, and moreover, dual purposes of using waste to treat waste are achieved. The preparation and dye degradation of the red mud-based polymer catalyst are simple in reaction technology, so that the practical application of large-scale preparation and dye degradation can be realized.

Description

technical field [0001] The invention belongs to the preparation of an aluminosilicate polymer catalyst and its application in the field of wastewater treatment, in particular to the preparation of a pure red mud-based polymer catalyst and its application in degrading organic dyes. Background technique [0002] Red mud is a muddy strong alkaline solid waste with high water content discharged during the alumina smelting process, mainly composed of fine-grained mud and coarse-grained sand. With the increasing development of the aluminum industry, the amount of red mud discharged from the production of alumina is huge. According to statistics, 1 to 1.8 tons of red mud is discharged for every ton of alumina produced. As the fourth largest producer of alumina in the world, China is only the top five aluminum Industrial bases (Shandong, Shanxi, Great Wall, Guizhou and Guangxi), the annual production of red mud reaches about 6 million tons, the accumulated red mud stock is nearly 20...

Claims

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Application Information

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IPC IPC(8): B01J21/12C02F1/32C02F1/58C02F101/38C02F101/34
CPCY02W10/37
Inventor 张耀君康乐刘礼才王晶司海啸张吉方
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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