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Ferro-manganese composite oxide catalyst and preparation method thereof

A technology of composite oxides and catalysts, applied in the field of water treatment, can solve the problems of secondary pollution of water bodies, large quantities, and increased treatment costs, and achieve the effects of simplified treatment, simple process flow, and low cost

Active Publication Date: 2015-12-02
W STARTECH BEIJING ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the Fenton method, the pH value of the wastewater needs to be adjusted to 2.5-3 before treatment, and the pH value should be adjusted to neutral after the reaction. Repeated acid and alkali adjustments increase the treatment cost, and produce a large amount of flocculation and precipitation, resulting in water pollution. secondary pollution

Method used

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  • Ferro-manganese composite oxide catalyst and preparation method thereof
  • Ferro-manganese composite oxide catalyst and preparation method thereof
  • Ferro-manganese composite oxide catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of Fe-Mn Composite Oxide Catalyst

[0037] Preparation steps:

[0038] 1) Take 100g of polyvinyl alcohol and add 10L of distilled water, heat and stir to dissolve, and cool to room temperature to obtain a polyvinyl alcohol solution.

[0039] 2) Add the polyvinyl alcohol solution and the sodium dodecylbenzenesulfonate solution with a molar concentration of 0.2mol / L to the ferrous sulfate solution with a molar concentration of 1.2mol / L, stir magnetically for 2min, and then add a solution with a molar concentration of 2.5mol / L. The sodium carbonate solution of L, makes mixed solution; Polyvinyl alcohol solution: sodium dodecylbenzene sulfonate solution: ferrous sulfate solution: sodium carbonate solution volume ratio is 5:20:30:8;

[0040] 3) Add natural ferromanganese ore to the mixed solution prepared in step 2), stir and react for 4 hours, add 300 g of natural ferromanganese ore per liter of mixed solution; separate the solid particles after the reaction, d...

Embodiment 2

[0042] With the preparation method of the iron-manganese composite oxide catalyst described in embodiment 1, the difference is:

[0043] In step 3), the dried solid particles were calcined at 550° C. for 3 hours to obtain an iron-manganese composite oxide catalyst, which was designated as material b.

[0044] Material b was characterized by XRD using Cu-Kα rays, and the obtained XRD pattern is as follows figure 1 As shown, it shows SiO at 2θ of 20.8°, 26.6°, 36.5°, 36.5°, 40°, 50°, 60° 2 Characteristic peaks; at 2θ of 23°, 33°, 38.3°, 55.3° show α-Mn 2 o 3 Characteristic peaks; at 2θ of 24°, 33.1°, 35.6°, 49.3°, 54° show α-Fe 2 o 3 Characteristic peaks.

[0045] According to fluorescence spectrum analysis, the above-mentioned iron-chromium composite oxide SiO 2 The content is about 15%, α-Mn 2 o 3The content is about 30-50%, α-Fe 2 o 3 The content is about 20-40%, and the trace elements are about 0.1%.

Embodiment 3

[0047] With the preparation method of the iron-manganese composite oxide catalyst described in embodiment 1, the difference is:

[0048] In step 3), the dried solid particles were calcined at 650° C. for 3 hours to obtain an iron-manganese composite oxide catalyst, which was designated as material c.

[0049] The catalyst of the present invention is applicable to a wide range of pH. Within the range of pH 3-8, the treatment effects of the iron-manganese composite oxide particles of the present invention on COD, chroma and ss can be seen in the pH range. Figure 2-Figure 4 shown.

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Abstract

The invention relates to a ferro-manganese composite oxide catalyst and a preparation method thereof. The ferro-manganese composite oxide catalyst is granular and is prepared by calcining polyvinyl alcohol, sodium dodecyl benzene sulfonate (SDBS), ferrous sulfate, sodium carbonate and natural ferro-manganese ore after reaction. The catalyst can be used for advanced degradation of papermaking wastewater after biochemical treatment. The catalyst disclosed by the invention is changed to ferro-manganese composite oxide particles from conventional ferrous sulfate, can be reused after calcination, is low in chemical sludge output, can save sludge treatment cost, can reduce production of secondary pollution, and can easily realize solid-liquid separation.

Description

technical field [0001] The invention relates to an iron-manganese composite oxide catalyst and a preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] The pulp and paper industry is an important part of my country's national economy, but it has also become one of the important sources of water pollution in my country. Wastewater discharges are large and contain high concentrations of biodegradable lignin and cellulose. The fiber suspension contains a large amount of organic matter. When these organic matters are fermented and decomposed, they will consume a large amount of dissolved oxygen in the water, thus deteriorating the water quality. Papermaking wastewater also contains a large number of persistent toxic substances, which are harmful to human health. The treatment of papermaking wastewater in my country mainly adopts a combination of physical treatment and biochemical treatment, but there are still many benzen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C02F1/72C02F103/28
Inventor 赵奂王波苏秀秀朱立刚史瑞明
Owner W STARTECH BEIJING ENVIRONMENTAL TECH
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