Ozonization water treatment method using manganese dioxide one-dimensional nano material as catalyst

A nanomaterial, manganese dioxide technology, applied in the direction of oxidized water/sewage treatment, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of low degradation efficiency and achieve mineralization The effect of increasing the degree and accelerating the degradation rate

Inactive Publication Date: 2010-11-24
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some organic substances are very stable, such as aromatic and fused ring compounds, etc., and the degradation efficiency is low when these organic substances are ozonated alone

Method used

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  • Ozonization water treatment method using manganese dioxide one-dimensional nano material as catalyst
  • Ozonization water treatment method using manganese dioxide one-dimensional nano material as catalyst
  • Ozonization water treatment method using manganese dioxide one-dimensional nano material as catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 1.59g of potassium permanganate and 0.68g of manganese sulfate monohydrate and add it to 100mL of distilled water; mix well to form a reddish-brown solution, then transfer it to a polytetrafluoroethylene-lined reactor, and keep it sealed at 140°C for 3h ; After the reaction is completed, filter the brown solid substance, wash away possible residual ions with distilled water, dry in air at 100° C. and then calcined at 350° C. for 2 hours to obtain manganese dioxide nanomaterials. Its TEM picture is shown in figure 1 , XRD pattern see figure 2 .

Embodiment 2

[0026] The initial concentration of phenol in 200ml is 100mg L -1 In the simulated wastewater, add 0.20g of manganese dioxide nanomaterials, start stirring, and pass through the ozone flow rate of 0.50mg min at the reaction temperature of 20°C -1 Ozone, record the concentration of phenol at different times. The result is as image 3 As shown, (1) line is ozonation alone (no catalyst), and (2) line is ozonation catalyzed by manganese dioxide nanomaterials. It indicated that the addition of manganese dioxide nanomaterials significantly promoted the degradation of phenol.

Embodiment 3

[0028] The initial concentration of phenol in 200ml is 100mg L -1 In the simulated wastewater, add 0.10g of manganese dioxide nanomaterials, start stirring, and pass ozone flow rate of 0.50mg min at the reaction temperature of 20°C -1 Ozone, record the concentration of phenol at different times. The result is as Figure 4 As shown, (1) line is ozonation alone (no catalyst), and (2) line is ozonation catalyzed by manganese dioxide nanomaterials. It indicated that the addition of manganese dioxide nanomaterials significantly promoted the degradation of phenol.

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Abstract

The invention relates to an ozonization water treatment method using a manganese dioxide one-dimensional nano material as a catalyst. The invention provides a preparation method and a using method of the nano-catalyst, which belong to the technical field of water treatment and environmental catalysis. Manganese dioxide nano rods are obtained by a simple and convenient hydrothermal method and the manganese dioxide nano rods serving as the catalyst are added into a phenol wastewater-containing ozonization water treatment system to contribute to the degradation of phenol organic pollutants, so that a novel ozonization water treatment method is provided on the basis. The obtained manganese dioxide one-dimensional nano material has the characteristics of small dimension, high dispersibility, high separability and wide application prospect in ozonization water treatment.

Description

technical field [0001] The invention belongs to the field of water treatment and environmental catalysis, and relates to an ozonated water treatment method using manganese dioxide one-dimensional nanometer material as a catalyst. Background technique [0002] In the current industrial production process, the discharge of organic waste water is increasing. Most of the organic matter is toxic and difficult to degrade. The pollution and threat to the ecological environment and human health are also becoming more and more serious. The chemical oxidation method is aimed at In the case of low concentration of organic pollutants in sewage and lack of recycling value, oxidizing agents are used to oxidize and degrade organic matter without causing new pollution to eliminate pollution. o 3 It has strong oxidizing property (En=2.07V), is easy to produce, and the conditions of the ozonation process are mild, easy to operate, and the oxidative degradation of organic matter is relatively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78B01J23/34
Inventor 董玉明蒋平平王光丽陈宏沈亮严文广林青
Owner JIANGNAN UNIV
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