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Application of spinel ferrite catalyst and method for urging persulfate to generate free radicals to catalytically degrade organic matters

A technology of spinel ferrite and persulfate, applied in chemical instruments and methods, solid waste removal, separation methods, etc., can solve problems such as easy to be oxidized and decomposed, harsh reaction conditions, complex reaction system, etc., to achieve High mechanical strength, complete catalysis, and less dosage

Inactive Publication Date: 2013-04-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that existing catalysts are easy to be oxidized and decomposed, low in strength, easily broken, dissolved with impurities, low in catalytic efficiency and difficult to recycle, and the existing activation technology has complex reaction systems , harsh reaction conditions, and high cost, and provide an application of a spinel ferrite catalyst and a method for promoting the generation of free radicals by persulfate to catalyze the degradation of organic matter

Method used

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  • Application of spinel ferrite catalyst and method for urging persulfate to generate free radicals to catalytically degrade organic matters
  • Application of spinel ferrite catalyst and method for urging persulfate to generate free radicals to catalytically degrade organic matters
  • Application of spinel ferrite catalyst and method for urging persulfate to generate free radicals to catalytically degrade organic matters

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specific Embodiment approach 1

[0014] Specific Embodiment 1: This embodiment is an application of a spinel ferrite catalyst, and the spinel ferrite catalyst is used as a catalyst to promote the generation of persulfate free radicals to promote the generation of persulfate or monopersulfate Application of free radicals.

[0015] The persulfate described in this embodiment is potassium persulfate, ammonium persulfate or sodium persulfate.

[0016] The monopersulfate described in this embodiment is potassium monopersulfate, ammonium monopersulfate or sodium monopersulfate.

specific Embodiment approach 2

[0017] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the spinel ferrite catalyst is spinel ferrite, metal-doped spinel ferrite, spinel Ferrite / carbonaceous material composite or spinel ferrite / metal oxide composite; wherein said spinel ferrite is NiFe 2 o 4 , MnFe 2 o 4 、CoFe 2 o 4 , ZnFe 2 o 4 , MgFe 2 o 4 、CuFe 2 o 4 , CrFe 2 o 4 , PbFe 2 o 4 , SrFe 2 o 4 、BaFe 2 o 4 and CaFe 2 o 4 One or a mixture of two of them, wherein the molecular formula of the metal-doped spinel ferrite is M 1-x N x Fe 2 o 4 , where 02 o 4 , MnFe 2 o 4 、CoFe 2 o 4 , ZnFe 2 o 4 , MgFe 2 o 4 、CuFe 2 o 4 , CrFe 2 o 4 , PbFe 2 o 4 , SrFe 2 o 4 、BaFe 2 o 4 or CaFe 2 o 4 , the carbonaceous material is one or a mixture of activated carbon, carbon nanotubes, graphene and bamboo carbon; wherein the spinel ferrite / metal oxide composite is made of spinel Made of ferrite and metal oxide, the mass ratio of the spinel ferrite to the metal ...

specific Embodiment approach 3

[0022] Specific embodiment three: This embodiment is a method for utilizing spinel ferrite catalysts to promote persulfate to produce free radicals to catalyze and degrade organic matter, specifically as follows: 1. Pretreatment: first, the water to be treated The pH value of the solution is adjusted to 4~8, and the temperature is controlled at 15°C~30°C to obtain pretreated water; 2. Degradation: first add persulfate or monopersulfate to deionized water to form an aqueous solution, and then add step 1 The obtained pretreated water is then added with a spinel ferrite catalyst, and treated at a stirring speed of 100r / min~4000r / min for 1min~200min to complete the degradation of organic matter in the water to be treated; The volume ratio of aqueous solution and the pretreatment water that step 1 obtains is (0.01~0.9): 1; If what add in step 2 is persulfate: S in the aqueous solution that obtains in step 2 2 o 8 2- The concentration is 0.5μmol / L~100μmol / L, and the spinel ferrite...

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Abstract

Application of spinel ferrite catalyst and a method for urging persulfate to generate free radicals to catalytically degrade organic matters relate to application of spinel ferrite catalyst and a method for degrading organic matters. The invention aims to solve the problems of high probabilities of oxygenolysis and breakage, low strength, impurity dissolution, low catalytic efficiency and difficulty in recovering in the existing catalyst as catalyst generated by sulfate free radicals and complex reaction system, rigor reaction conditions and higher cost in the existing activating technology. The spinel ferrite catalyst, as catalyst for urging the generation of persulfate free radicals, for urging persulfate or mono-persulfate to generate free radicals is applied; and the method comprises the following steps: the spinel ferrite catalyst is adopted as catalyst for urging the generation of persulfate free radicals to urge persulfate or mono-persulfate to generate free radicals; and then sulfuric acid free radicals are used for degrading the organic matters. The application and the method are mainly applied in catalytic degradation of the organic matters.

Description

technical field [0001] The invention relates to the application of a spinel ferrite catalyst and a method for degrading organic matter. Background technique [0002] With the rapid development of society and economy, while people's living standards continue to improve, environmental pollution and ecological damage are becoming more and more serious. Issues such as water resource shortage, air pollution and soil pollution are becoming more and more prominent. Many rivers, lakes, groundwater and soil The unscrupulous discharge of industrial waste gas and automobile exhaust also caused serious air pollution. The extensive application of chemical pesticides and chemical fertilizers in agriculture has caused serious damage to the soil ecological environment. Among them, refractory pollutants such as environmental estrogen have been proven to pose serious hazards to human health and the ecological environment. These refractory organic pollutants have complex structures and are wi...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01D53/86B01D53/44B09B3/00C02F101/30
Inventor 马军任月明林令强关英红张晨
Owner HARBIN INST OF TECH
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