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Method of degrading organic pollutants

A technology of organic pollutants and pollutants, applied in water pollutants, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of weak catalytic peroxide performance and large Cu dissolution, and achieve catalyst structure stability, Excellent performance and wide application range

Inactive Publication Date: 2018-12-25
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved: For the existing Cu-containing heterogeneous catalysts, the catalytic peroxide performance is weak, and the Cu in the catalytic process 2+ Dissolution amount is large etc. technical problem, the present invention provides a kind of method containing Cu layered metal hydroxide catalyzed peroxide degradation organic pollutant

Method used

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  • Method of degrading organic pollutants

Examples

Experimental program
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Effect test

Embodiment 1

[0022]This embodiment utilizes a kind of Cu-containing layered metal hydroxide of the present invention to catalyze the steps in the degradation of organic pollutants by peroxides, and compare different Cu(II), Mg(II), Fe(III), Al(III) Ratio of Cu(II)-Mg(II)-Fe(III)LDHs, Cu(II)-Fe(II)-Fe(III)LDHs and Cu(II)-Mg(II)-Al(III)LDHs catalyzed Degradation efficiency, total organic carbon (TOC) removal rate and Cu 2+ Dissolution amount:

[0023] A. Cu(II)-Mg(II)-Fe(III)LDHs (Cu(II):Mg(II):Fe(III) molar ratio is 1:1:1) catalytic hydrogen peroxide system

[0024] Step 1, add 0.1mmol·L -1 Ethylbenzene in groundwater and 2.0mmol·L -1 Hydrogen peroxide, pH 7.0;

[0025] Step 2, add 0.1g L under stirring -1 Catalyst Cu(II)-Mg(II)-Fe(III) LDHs of the present invention (Cu(II):Mg(II):Fe(III) molar ratio is 1:1:1) After the reaction bottle is placed in shock In the bed, the rotation speed is 150rpm, the temperature is 25°C, and the reaction time is 6.0h. This is System 1.

[0026] B. Cu(...

Embodiment 2

[0045] This embodiment utilizes a Cu(II)-Mg(II)-Fe(III) LDHs (Cu(II):Mg(II):Fe(III) molar ratio of Cu(II)-Mg(II):Fe(III) layered metal hydroxide of the present invention is 2.5:2.5:1) Catalyzed steps in peroxide degradation of organic pollutants, comparing hydrogen peroxide alone, sodium persulfate and CuO, MgO and Fe respectively 2 o 3 Catalytic hydrogen peroxide, sodium persulfate and catalyst Cu(II)-Mg(II)-Fe(III) LDHs (Cu(II):Mg(II):Fe(III) mol ratio of the present invention are 2.5:2.5: 1) The degradation efficiency, total organic carbon (TOC) removal rate and Cu 2+ Dissolution amount:

[0046] A. Use hydrogen peroxide system alone

[0047] Step 1, add 0.1mmol·L -1 Dioxane in groundwater and 2.0mmol·L -1 Hydrogen peroxide, pH 7.0;

[0048] Step 2: Place the reaction bottle in a vibrating bed with a rotation speed of 150 rpm, a temperature of 25° C., and a reaction time of 6.0 h. This is System 1.

[0049] B. Use sodium persulfate system alone

[0050] Step 1, add ...

Embodiment 3

[0082] A Cu(II)-Fe(II)-Fe(III) LDHs (Cu(II):Fe(II):Fe(III) molar ratio of Cu(II)-Fe(II):Fe(III) molar ratio is 2.5:2.5 : 1) The method of catalyzing peroxide degradation organic pollutants is to compare the degradation rate of nitrobenzene (a kind of semi-volatile organic pollutants), TOC removal rate and Cu 2+ Dissolution amount:

[0083] Step 1. Add 0.1mmol·L -1 Add 1.0, 5.0 and 10.0mmol L to the surface water of nitrobenzene -1 After hydrogen peroxide, adjust the pH to 7.0, and the above systems are marked as system 1, 2 and 3; add 0.1mmol·L -1 Add 1.0, 5.0 and 10.0mmol L to the surface water of nitrobenzene -1 After potassium persulfate, adjust the pH to be 7.0, and the above-mentioned systems are marked as systems four, five and six;

[0084] Step 2. Under stirring conditions, add 0.05, 0.25, 0.5, 0.05, 0.25, 0.5g·L -1 Catalyst Cu(II)-Fe(II)-Fe(III)LDHs of the present invention (Cu(II):Fe(II):Fe(III) molar ratio is 2.5:2.5:1) in system one, two, three , 4, 5 and 6; ...

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Abstract

A method of degrading organic pollutants includes adding peroxides into water containing organic pollutants, wherein the molar ratio of the peroxides to the organic pollutants is 10:1 to 100:1; addinga catalyst while stirring, wherein the catalyst is a copper-bearing layered metallic hydrogen oxide, and the addition of the catalyst is 0.02-0.5 g L<-1>. The method allows peroxides to be effectively catalyzed, can degrade organic pollutants efficiently and enables little Cu2+ to be dissolved out during reaction.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a method for degrading organic pollutants by catalyzing peroxides with copper-containing layered metal hydroxides. Background technique [0002] With the development of industry and agriculture, environmental problems are becoming more and more serious around the world. Environmental pollution has become one of the three major global crises alongside resource shortages and ecological destruction. Among them, the water pollution that human beings rely on for survival and development is particularly prominent, and the consequences of organic pollution in water bodies are particularly serious. Hydroxyl radicals (·OH, E0=2.80V) and sulfate radicals (SO 4 · - ,E 0 =2.60V) advanced oxidation technology has received more and more attention because of its rapid and efficient degradation of organic pollutants. [0003] Traditional methods of catalyzing peroxides inclu...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J23/72B01J23/745C02F101/30
CPCB01J23/72B01J23/745B01J23/78C02F1/722C02F1/725C02F2101/30C02F2305/02C02F2305/023
Inventor 晏井春陈梦舫钱林波高卫国陈云
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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