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Method, product and application for preparing heterogeneous composite catalyst based on sludge treatment

A sludge treatment and composite technology, which is applied in physical/chemical process catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problems of sludge material that has not been further reported and has not been completely solved. , to achieve the effect of low processing cost, simple operation and high stability

Inactive Publication Date: 2016-08-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this document did not further report on how to further process and utilize the final sludge material, and did not completely solve the problem of sludge treatment.

Method used

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  • Method, product and application for preparing heterogeneous composite catalyst based on sludge treatment
  • Method, product and application for preparing heterogeneous composite catalyst based on sludge treatment
  • Method, product and application for preparing heterogeneous composite catalyst based on sludge treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add 0.001mol manganese sulfate aqueous solution (10ml, 0.1mol / L) into 400ml wet sludge with a water content of 80%, stir for 20min, mix well and let stand for 12h, then add 10ml, 0.12mol / L ammonium persulfate (0.0012mol) aqueous solution, stirred and mixed at room temperature, then carried out hydrothermal reaction, the temperature was 120°C, and the time was 12h. After the hydrothermal reaction, it was naturally cooled to room temperature, centrifuged, the obtained solid was washed with water, and finally dried to obtain sludge-based active MnO x , wherein x is generally between 3-4, and the following examples are the same.

[0039] The heterogeneous composite catalyst MnO prepared in this embodiment x The performance measurements were carried out separately, and the test results were as follows: figure 1 , figure 2 , image 3 Shown:

[0040] figure 1 MnO x , manganese dioxide and sludge X-ray diffraction pattern, by figure 1 It can be seen that the sludge con...

Embodiment 2

[0045] Add 0.002mol manganese sulfate aqueous solution (10ml, 0.2mol / L) into 400ml wet sludge with a water content of 80%, stir for 20min, mix well and let stand for 12h, then add 10ml, 0.24mol / L ammonium persulfate (0.0024mol) aqueous solution, stirred and mixed at room temperature, then carried out hydrothermal reaction, the temperature was 120°C, and the time was 12h. After the hydrothermal reaction, it was naturally cooled to room temperature, centrifuged, and the obtained solid was washed with water, and finally dried to obtain a multiphase composite Catalyst MnO x .

Embodiment 3

[0047] Add 0.001mol manganese sulfate aqueous solution (10ml, 0.1mol / L) into 400ml wet sludge with a water content of 80%, stir for 20min, mix well and let stand for 12h, then add 10ml, 0.12mol / L ammonium persulfate (0.0012mol) aqueous solution, stirred and mixed at room temperature, then carried out hydrothermal reaction, the temperature was 140°C, and the time was 12h. After the hydrothermal reaction, it was naturally cooled to room temperature, centrifuged, the obtained solid was washed with water, and finally dried to obtain a multiphase composite Catalyst MnO x .

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Abstract

The invention discloses a method for preparing a heterogeneous composite catalyst based on sludge treatment, comprising: adding metal salts to wet sludge, stirring, standing still, adding persulfate, and carrying out water under the condition of 120-250°C. After thermal reaction and hydrothermal reaction are complete, cool, separate the solid, wash with water, and dry to obtain a heterogeneous composite catalyst. The invention also discloses a catalyst product prepared by the method and an application method of the product in treating dye wastewater. When the heterogeneous composite catalyst of the present invention is used to treat dye wastewater, the operation is simple. It only needs to put the product directly into the solution containing dye wastewater, then add Oxone oxidant, and stir the reaction at room temperature to complete the catalytic degradation process. , environment-friendly, low cost, and has industrial application prospects.

Description

technical field [0001] The invention belongs to the field of water treatment and environmental catalysis, in particular to a method for preparing multiphase composite metal oxides (MeO x ) methods, products and applications of catalysts. Background technique [0002] With the rapid development of social economy and the continuous improvement of urbanization level, the discharge of industrial sewage and domestic sewage is increasing, and the sludge output of sewage treatment plants is also increasing sharply, and the sludge contains toxic pollutants. These toxic and harmful substances enter Water and soil will cause environmental pollution. At present, the treatment and disposal methods of urban sewage plant sludge are mainly landfill, incineration, and composting. There are a series of problems in these treatment and disposal methods. Therefore, it is particularly important to open up a new way of sludge resource utilization. Due to the high water content of sludge (up to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/00B01J23/34B01J23/75C02F1/72
Inventor 文岳中徐丽丽马建青刘维屏
Owner ZHEJIANG UNIV
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