Method for utilizing metal organic skeleton to carry out efficient catalytic activation on persulfate or peroxymonosulfate to process organic wastewater

A metal-organic framework and persulfate technology, which is applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment, etc., can solve the problems of unrecyclable iron sludge and easy failure of ferrous ions, etc., and achieve Broad practical application prospects, short catalytic time and strong operability

Active Publication Date: 2016-09-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that existing homogeneous catalysts such as ferrous ions and zero-valent iron have ferrous ions in the activat

Method used

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  • Method for utilizing metal organic skeleton to carry out efficient catalytic activation on persulfate or peroxymonosulfate to process organic wastewater
  • Method for utilizing metal organic skeleton to carry out efficient catalytic activation on persulfate or peroxymonosulfate to process organic wastewater
  • Method for utilizing metal organic skeleton to carry out efficient catalytic activation on persulfate or peroxymonosulfate to process organic wastewater

Examples

Experimental program
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Effect test

Embodiment example 1

[0029] In this implementation case, the MIL-88A catalyst was prepared under the preparation condition of 2h / 65°C to study the degradation effect of MIL-88A on OG.

[0030] (1) Preparation of metal-organic framework MIL-88A: Weigh 0.9744g (1mol) fumaric acid and 2.2722g (1mol) FeCl 3 ·6H 2 O was dissolved in 42ml of deionized water, and after stirring for 1 hour, the solution was transferred to a 100ml polytetrafluoroethylene-lined reaction kettle, and the reaction kettle was placed in a blast drying oven, and reacted at 65°C for 2h Finally, the reactor was taken out, and the reactor was cooled to room temperature. After the reaction kettle was cooled, the reacted mixture was taken out, and centrifuged at 9000rpm for 10 minutes to obtain a light yellow solid, then the light yellow solid was poured into a beaker, washed with ethanol for 3 hours, centrifuged, and then washed with deionized water for 3 hours. This was repeated twice, and after obtaining a solid, it was placed in...

Embodiment example 2

[0041] In this implementation case, MIL-88A prepared under the preparation condition of 2h / 65°C was used as the catalyst to study Na 2 S 2 o 8 and OG in different molar ratios (nNa 2 S 2 o 8 / nOG=20, 40, 60, 80, 100) on the catalytic activation reaction.

[0042] (1) The preparation method of metal-organic framework MIL-88A is the same as step (1) in Example 1;

[0043] (2) Prepare 100mmol / L Na 2 S 2 o 8 Solution, the OG solution of 10mmol / L is standby;

[0044] (3) Use the Erlenmeyer flask as the reactor, add 100mmol / LNa into the reactor 2 S 2 o 8 2mL and 10mmol / LOG 1mL (nNa 2 S 2 o 8 / nOG=20) and deionized water to keep the volume of the solution in the reactor at 100mL, and at the same time, add 0.03g metal-organic framework material MIL-88A to the reactor, adjust the pH=2.8, and place the Erlenmeyer flask at 300rpm In the shaker, the reaction is carried out under normal temperature conditions, and sampling and analysis are carried out at fixed points;

[0...

Embodiment example 3

[0054] This implementation case uses MIL-88A prepared under the preparation conditions of 2h / 65°C as the catalyst to study the dosage of MIL-88A (0.005g, 0.01g, 0.02g, 0.03g, 0.04g, 0.05g, 0.06g) for The effect of the catalytic activation reaction.

[0055] (1) The preparation method of metal-organic framework MIL-88A is the same as step (1) in Example 1;

[0056] (2) Prepare 100mmol / L Na 2 S 2 o 8 Solution, the OG solution of 10mmol / L is standby;

[0057] (3) Use the Erlenmeyer flask as the reactor, add 100mmol / LNa into the reactor 2 S 2 o 8 6mL and 10mmol / LOG 1mL (nNa 2 S 2 o 8 / nOG=60) and deionized water to keep the volume of the solution in the reactor at 100mL, and at the same time, add 0.005g metal-organic framework material MIL-88A to the reactor, adjust the pH=2.8, and place the Erlenmeyer flask at 500rpm In the shaker, the reaction is carried out under normal temperature conditions, and sampling and analysis are carried out at fixed points;

[0058] (4) A...

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Abstract

The invention discloses a method for utilizing a metal organic skeleton to carry out efficient catalytic activation on persulfate or peroxymonosulfate to process organic wastewater. According to the method, a metal organic skeleton material is used as a catalyst, and the characteristics of high active site and high catalytic activity of the metal organic skeleton are used for carrying out catalytic activation on persulfate or peroxymonosulfate to generate sulfate free redical under a condition of normal temperature to degrade organic pollutants in the organic wastewater. The catalyst is easy in recovering and reusing, the activation effect of the catalyst is still good after the catalyst is reused for multiple times, and the catalyst is an environment-friendly material. The method is suitable for processing various types of organic wastewater, has the advantages of good durability, short catalysis time and convenience in operation, has a good degradation effect within a wide PH (Potential of Hydrogen) range, and has a large application prospect on an aspect of the degradation of water body organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of oxidation treatment of organic pollutants in water, and in particular relates to a method for treating organic wastewater by using metal-organic frameworks to efficiently catalyze and activate persulfate or hydrogen persulfate at normal temperature. Background technique [0002] Water pollution control is the subject of research by environmental protection personnel today. Water pollution is one of the serious crises facing mankind today. Controlling water pollution, especially toxic and harmful organic pollution in water, is the focus and difficulty of water treatment engineering research. The advanced oxidation technology based on sulfate radical (SO4⁻·) has attracted more and more attention and attention of researchers due to its high efficiency in degrading pollutants. In the existing reports, photoactivation, thermal activation, ultrasound and activation of metal ions are generally used to generate s...

Claims

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Application Information

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IPC IPC(8): C02F1/72
CPCC02F1/725
Inventor 万金泉王九妹马邕文王艳
Owner SOUTH CHINA UNIV OF TECH
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