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A method of using manganese dioxide to treat organic solid phase waste and preparing manganese trioxide and using the product to treat pollutants in water

A technology of manganese trioxide and manganese dioxide, which is applied in the field of processing and preparation of new materials, can solve the problems of destroying the composition structure, toxic and large dioxins, secondary pollution, etc., achieve high activity, achieve complete degradation and mine low-cost effect

Active Publication Date: 2020-05-15
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through incineration, its composition structure can be effectively destroyed, but a large amount of acid gas and incompletely burned organic components and slag will be produced during the incineration process. If it is directly discharged into the environment, it will inevitably lead to secondary pollution.
For example, when incinerating halogenated organic solid waste at high temperature, more toxic dioxins may be produced

Method used

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  • A method of using manganese dioxide to treat organic solid phase waste and preparing manganese trioxide and using the product to treat pollutants in water
  • A method of using manganese dioxide to treat organic solid phase waste and preparing manganese trioxide and using the product to treat pollutants in water
  • A method of using manganese dioxide to treat organic solid phase waste and preparing manganese trioxide and using the product to treat pollutants in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1: Mix manganese dioxide and decabromodiphenyl ether solid powder in a mortar according to the material molar ratio of 100:1, and then transfer to a dry stainless steel ball mill jar. Then add 50 stainless steel grinding balls into the tank, the diameter of the grinding balls is 10 mm, and the weight is 4 g. The volume of the ball mill jar is 250 mL, the inner depth of the jar body is 70 mm, and the inner diameter of the jar mouth is 77 mm. The ball mill jar and the ball mill cover are connected by a sealing ring.

[0033] Step 2: Fix the ball mill jar on the ball mill, set the rotation speed of the ball mill jar to 350 rpm, conduct the ball mill reaction at normal temperature and pressure, and change the revolution direction of the ball mill once every 15 minutes of reaction. After the ball milling reaction was carried out for 5, 15, 30, 60 and 120 min respectively, the ball milling tank was taken out, and the gas and solid powder in the tank were collected.

[...

Embodiment 2

[0038] In order to monitor the change of the material during the ball milling reaction, steps 1 and 2 in Example 1 were repeated, and samples were taken at different time points (0, 5, 15, 30, 60 and 120 min) of the ball milling reaction, and the samples were obtained The solid samples were subjected to X-ray diffraction (XRD) measurement, the obtained results are as follows image 3 shown. By comparison with the XRD standard card, it can be seen that the material before the reaction is mainly β-MnO 2 (Such as image 3 shown by ☆ in ); with the prolongation of ball milling reaction time, the β-MnO 2 The characteristic diffraction peaks gradually decrease, and at the same time, the 2θ is 23 o 、33 o and 55 o Nearby, some new diffraction peaks (such as image 3 Indicated by △). After comparative analysis, the new peak belongs to Mn 2 o 3 , indicating that some β-MnO 2 Converted to Mn by ball milling reaction 2 o 3 . When the ball milling reaction was carried out for ...

Embodiment 3

[0040] In order to evaluate the catalytic performance of the material after the ball milling reaction, the material after the reaction in Step 2 of Example 1 was collected. This material of 0.04g is added into the 250mL beaker that is filled with 100mL concentration and is 25mg / L phenol waste liquid, is placed on the magnetic stirrer, at 25 o After stirring and mixing at C for a certain period of time, 1 mL of 30 g / L persulfate was added thereto to start the catalytic degradation reaction of phenol. When the reaction was carried out for 2, 5, 10, 20, 30 and 60 min respectively, 750 μL of the reaction solution was taken out and placed in a 1.5 mL centrifuge tube, mixed with 750 μL of anhydrous methanol and centrifuged (14000 rpm) for 5 min to obtain the supernatant After the liquid was filtered through a 0.22 μm filter membrane, the residual phenol concentration in the filtrate was determined by high performance liquid chromatography, and the results were as follows: Figure 4...

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Abstract

The invention discloses a method for treating poisonous organic pollutant solid waste through ball milling mechanochemistry with manganese dioxide as an oxidant and reaction raw materials and preparing manganic oxide simultaneously and belongs to the technical field of waste treatment and new material preparation. According to the method, under the normal temperature and normal pressure, the organic solid waste and the manganese dioxide are put in a planetary ball milling reactor in a mixed mode, and oxidation reaction of the manganese dioxide and organic pollutants is reinforced by a mechanical force effect. On the one hand, fast degradation and deep mineralization of the organic pollutants are achieved; and on the other hand, reduction of the manganese dioxide is achieved, peroxymonosulfate can be activated by the manganic oxide, the reduzate of the manganese dioxide, and converted into sulfate radical anions, and then the poisonous organic pollutants in water are treated. The method has the following advantages that the treating process of the poisonous organic pollutant solid waste is simple, reaction conditions are mild, and oxidation and mineralization are thorough; and meanwhile, after reaction, the catalyst manganic oxide activating the peroxymonosulfate can be prepared by the oxidant used by treatment reaction.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment of organic pollutants and preparation of new materials, and relates to a method for treating organic solid phase wastes with manganese dioxide and simultaneously preparing manganese trioxide and using the product to treat organic pollutants in water. Background technique [0002] With the development of industry, the hazardous solid waste discharged from the industrial production process is increasing day by day. It is estimated that the annual hazardous waste generation in the world is 330 million tons. Compared with inorganic hazardous solid waste, there are many kinds of organic hazardous solid waste. For example, nitrogen-containing organic wastes generated in the manufacturing of organic and special chemical products, printing and dyeing industry, polychlorinated (brominated) biphenyl wastes in waste capacitors, circuit boards, and transformers, chlorinated residues generated in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C17/10B02C23/06C01G45/02B01J23/34C02F1/72C02F101/30C02F101/34
CPCB01J23/34B02C17/10B02C23/06C01G45/02C02F1/725C02F2101/308C02F2101/345
Inventor 王楠柴慧娟朱丽华张志敏吕汉清唐和清
Owner HUAZHONG UNIV OF SCI & TECH
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