Method for treating organic pesticide by activating sulfate radicals based on iron-based polyatomic coupling catalyst

A technology for organic pesticides and catalysts, which is applied in the directions of heterogeneous catalyst chemical elements, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as unfavorable carcinogenicity, and achieve the effect of accelerating transformation

Active Publication Date: 2020-11-13
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

co 2+ Ion is the most effective sulfate radical activator, but its strong carcinogenicity is not conducive to vigorous promotion in environmental treatment applications

Method used

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  • Method for treating organic pesticide by activating sulfate radicals based on iron-based polyatomic coupling catalyst
  • Method for treating organic pesticide by activating sulfate radicals based on iron-based polyatomic coupling catalyst
  • Method for treating organic pesticide by activating sulfate radicals based on iron-based polyatomic coupling catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Iron-based polyatomic coupling catalyst activates PMS to efficiently degrade thiacloprid

[0028] Preparation of iron-based polyatomic coupling catalyst, the steps are as follows:

[0029] 1) Add 0.275g Zn(NO 3 ) 2 ·6H 2 O, 0.237g Mg(NO 3 ) 2 ·6H 2 O, 0.223g Cu(NO 3 ) 2 ·3H 2 O and 0.331g Mn(NO 3 ) 2 (50% by weight aqueous solution) mixed and stirred to form a mixed metal salt A for subsequent use. Mixed metal salt A and 2.987g Fe(NO 3 ) 3 9H 2Dissolve O together in 10mL water to form metal salt solution B for later use; weigh 2.13g citric acid and dissolve it in 10mL water to configure aqueous solution C; add aqueous solution C to metal salt solution B under stirring, and react in the resulting mixed solution to form multinuclear Zn / Mg / Cu / Mn / Fe-citrate complex;

[0030] 2) Slowly add 4.2mL of ammonia water with a concentration of 25~28% by weight to the mixture obtained in step 1) under rapid stirring, adjust the pH value to 7, then add 2mL of...

Embodiment 2

[0050] Example 2 The iron-based polyatomic coupling catalyst activates PMS to efficiently degrade isoproturon.

[0051] The preparation process of the catalyst in this embodiment 2 was repeated in embodiment 1.

[0052] The iron-based polyatomic coupling catalyst prepared in Example 2 cooperates with PMS to form a multiphase system (MM-ZnFe 2 o 4 / PMS system) is applied to the control of organic pesticides, the specific process is as follows:

[0053]S1: Prepare an aqueous solution of isoproturon with a concentration of 2.5 mg / L. Take 50mL of the prepared 2.5mg / L isoproturon aqueous solution, add 0.0025g of the iron-based polyatomic coupling catalyst prepared in Example 2, ultrasonically disperse the catalyst in the solution for 2 minutes, and then place the mixed solution under mechanical stirring Under low temperature, the temperature of the mixed solution is controlled at room temperature 25°C through a low-temperature constant temperature tank, 400 microliters of 50mM P...

Embodiment 3

[0055] Example 3 The iron-based polyatomic coupling catalyst activates PMS to efficiently degrade 2,4-dichlorophenol.

[0056] The preparation process of the catalyst in Example 3 was repeated in Example 1.

[0057] The iron-based polyatomic coupling catalyst prepared in Example 3 cooperates with PMS to form a multiphase system (MM-ZnFe2O4 / PMS system) and is applied to the treatment of organic pesticides. The specific process is as follows:

[0058] S1: Prepare an aqueous solution of 2,4-dichlorophenol with a concentration of 2.5mg / L. Take 50mL of the prepared 2.5mg / L 2,4-dichlorophenol aqueous solution, add 0.0025g of the iron-based polyatomic coupling catalyst prepared in Example 3, ultrasonically disperse the catalyst in the solution for 2 minutes, and then dissolve the mixed solution Under mechanical stirring, the temperature of the mixed solution was controlled at room temperature 25° C. by a low-temperature thermostat, and 400 microliters of 50 mM PMS solution was added...

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Abstract

The invention discloses a method for treating an organic pesticide by activating sulfate radicals based on an iron-based polyatomic coupling catalyst. The method comprises the following steps: addingthe iron-based polyatomic coupling catalyst into a water body containing the organic pesticide, adding peroxymonosulfate, and carrying out heterogeneous catalytic reaction for degrading the organic pesticide in the water body by adjusting the pH value to a neutral state. After the reaction is finished, the catalyst is rapidly recycled through magnetic separation, and the water body subjected to degradation treatment is obtained. The iron-based polyatomic coupling catalyst is a Zn-Mg-Cu-Mn-Fe polyatomic coupling oxide material prepared by substituting a part of Zn atoms in a ZnFe2O4 material byMg, Cu and Mn. The prepared iron-based polyatomic coupling catalyst has a nanocrystalline self-assembly two-dimensional sheet structure, and compared with a nanoparticle structure, separation after use is facilitated. As the bulk phase of the catalyst is rich in various transition metal atoms, the efficiency of catalytically degrading pollutants can be effectively improved under the synergistic coupling action of multiple atoms.

Description

technical field [0001] The invention relates to the technical field of organic pesticide residue treatment in water / soil systems, in particular to a method for treating organic pesticides based on an iron-based polyatomic coupling catalyst activating sulfate radicals. Background technique [0002] In order to meet the needs of agricultural development, pesticides are produced and used in large quantities. According to the 2014 "National Soil Pollution Survey Bulletin", more than 16% of the country's land resources are polluted by organic substances (such as pesticides) and heavy metals. Soil pollution alone caused economic losses of more than 20 billion yuan due to reduced grain production. Organic pesticides, including chlorinated polycyclic compounds, etc., have chemical stability, biotoxicity and enrichment effects after entering the water / soil system, and are difficult to be treated by (micro)biological technology. They are "water / soil ecological environment protection" ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J23/889C02F101/30
CPCC02F1/725B01J23/002B01J23/8892C02F2101/306B01J2523/00B01J2523/17B01J2523/22B01J2523/27B01J2523/72B01J2523/842
Inventor 胡钟霆龚思燕吴骏吕伯昇张一平陈月邢文豪
Owner ZHEJIANG UNIV OF TECH
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