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Preparation method and application of catalyst for treating industry dye wastewater

A dye wastewater and catalyst technology, applied in the direction of oxidized water/sewage treatment, etc., can solve problems such as refractory degradation, toxicity, complex structure, etc., and achieve the effects of easy industrial production, good catalytic degradation effect, and simple preparation method.

Inactive Publication Date: 2015-06-03
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Dyes can be divided into direct dyes, sulfur dyes, vat dyes, acid dyes, acid complex dyes, reactive dyes, Nafufu dyes (or insoluble azo dyes or ice dyes), oxidation dyes, disperse dyes and cationic dyes according to their types. Dyes, etc., the dye industry process is complicated, and there are many kinds of dyes and intermediates discharged into the environmental water body, with complex structures, difficult to degrade and most of them have certain toxicity, resulting in technical difficulties in treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: mesoporous structure composite metal oxide Mg / Fe 2 o 3 Prepare as follows:

[0010] 0.6g KIT-6 was dispersed in 5ml toluene, stirred for 30min, 0.139g Fe(NO 3 ) 3 9H 2 O and 0.362g Mg(NO 3 ) 2 ·6H 2 O was added to the above mixed system, and refluxed at 70°C for 6 hours to make it a uniform system; the solid powder in the system was dried in an oven at 60°C, and the temperature was 1°C·min -1 The heating rate was increased to 600°C and roasted in a muffle furnace for 3h; then the obtained solid powder was added to 2M NaOH solution, stirred in a water bath at 60°C for 24h to remove the template KIT-6, and finally washed three times with distilled water and ethanol, and placed in a vacuum oven Dry in medium.

[0011] The pores of the prepared catalyst are three-dimensional structure with regular arrangement, and the specific surface area is 90.7m 2 / g, the pore size is 9.1nm, and the tube wall spacing is about 0.48nm.

Embodiment 2

[0013] In the heterogeneous Fenton reaction, a catalyst is used to excite H 2 o 2 Decomposition produces OH, so the amount of catalyst has a certain influence on the degradation efficiency of methylene blue. In order to examine the effect of catalyst dosage on the degradation rate of methylene blue, four sets of comparative experiments were done by changing the catalyst dosage under the condition that other conditions were kept the same. Table 1 shows the effect of catalyst dosage on the degradation effect of methylene blue.

[0014] Table 1 Effect of catalyst dosage on the degradation effect of methylene blue

[0015] dosage

[0016] It can be seen from the above table that the amount of catalyst has a significant impact on the removal rate of the methylene basket solution. Generally speaking, the amount of catalyst increases, the number of surface active sites will increase accordingly, and the catalytic performance of the catalyst will increase. The activity is...

Embodiment 3

[0018] In order to examine the stability of the catalyst, the newly prepared catalyst was used for three repeated use degradation tests. After each use, the catalyst was washed with ethanol three times and then dried for the next use.

[0019] Table 2 Comparison of multiple use effects

[0020] usage count

[0021] As can be seen from Table 2, as the number of uses of the prepared catalyst increases, the degradation effect on methylene blue increases instead of decreasing. Larger, more active sites are exposed, which improves the catalytic activity. Therefore, the mesoporous structure composite metal oxide Mg / Fe 2 o 3 It has certain stability and anti-pollution ability.

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Abstract

The invention provides a preparation method and application of catalyst for treating industry dye wastewater. According to the preparation method, a KIT-6 used as a template and metal salts (Fe(NO3)3.9H2O and Mg(NO3)2.6H2O) are refluxed in methylbenzene at 70 DEG C for 6h to form a system, then the system is dried, heated to be at 600 DEG C to be roasted for 3h at 1 DEG C / min heating rate, the KIT-6 template is removed by 2M NaOH solution, the system is dried in a vacuum drying box, and the catalytic performance of the prepared catalyst is checked by degradation of 60mg / L of methylthionine chloride solution. The catalyst has simple preparation method, low cost, high catalytic activity and high stability, cannot cause secondary pollution and is suitable for treatment of multiple kinds of industry dye wastewater.

Description

technical field [0001] The invention relates to a preparation method and application of a catalytic material, in particular to a preparation method and application of a catalytic material for treating industrial dye wastewater. Background technique [0002] With the continuous development of industry, the discharge of dye industry wastewater to the environment has increased dramatically. Dyes can be divided into direct dyes, sulfur dyes, vat dyes, acid dyes, acid complex dyes, reactive dyes, Nafufu dyes (or insoluble azo dyes or ice dyes), oxidation dyes, disperse dyes and cationic dyes according to their types. Dyes, etc., the dye industry process is complicated, and there are many kinds of dyes and intermediates discharged into the environmental water body, with complex structures, difficult to degrade and most of them have certain toxicity, resulting in technical difficulties in treatment. Therefore, efforts to develop new water treatment technologies and processes to im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72
Inventor 王海涛郑春明初园园王威
Owner TIANJIN POLYTECHNIC UNIV
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