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Method for degrading organic pollutants in water by using nitrogen-doped porous carbon anchored monatomic cobalt catalyst to activate persulfate

A technology of nitrogen-doped porous carbon and activated persulfate is applied in water pollutants, chemical instruments and methods, oxidized water/sewage treatment, etc. The effect of improving yield and good degradation performance

Inactive Publication Date: 2021-02-26
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the construction system is easily affected by water quality, and it is difficult to show excellent degradation performance in simulating actual wastewater

Method used

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  • Method for degrading organic pollutants in water by using nitrogen-doped porous carbon anchored monatomic cobalt catalyst to activate persulfate
  • Method for degrading organic pollutants in water by using nitrogen-doped porous carbon anchored monatomic cobalt catalyst to activate persulfate
  • Method for degrading organic pollutants in water by using nitrogen-doped porous carbon anchored monatomic cobalt catalyst to activate persulfate

Examples

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Effect test

Embodiment 1

[0034] A method utilizing nitrogen-doped porous carbon anchored monoatomic cobalt catalyst (Co-N / C) to activate persulfate to degrade organic pollutants in water, comprising the following steps:

[0035] Take 100 mL of phenol solution with a molar concentration of 50.0 μM in a 250 mL Erlenmeyer flask, use 2.0 mM borate buffer to control the pH of the solution at 7.0 ± 0.1, and add nitrogen-doped porous carbon-anchored single-atom cobalt catalyst (Co -N / C) and permonosulfate (PMS) initiated the reaction, and the dosages of Co-N / C and PMS in the reaction system were 0.08g / L and 0.5mmol / L, respectively. The reaction was carried out in a water-bath shaker with a rotation speed of 150 rpm, a temperature of 30° C., and a time of 60 minutes to complete the degradation of phenol in water. The permonosulfate (PMS) employed was potassium peroxymonosulfate.

[0036] In this embodiment, the preparation method of the single-atom cobalt catalyst (Co-N / C) anchored by nitrogen-doped porous c...

Embodiment 2

[0051] A method utilizing nitrogen-doped porous carbon anchored monoatomic cobalt catalyst (Co-N / C) to activate persulfate to degrade organic pollutants in water, comprising the following steps:

[0052] Take 100mL of sulfamethazine solution with a molar concentration of 50.0μM in a 250mL Erlenmeyer flask, use 2.0mM borate buffer to control the pH of the solution at 7.0±0.1, prepare 5 parts of the above solution, add chloride ion, carbonic acid Hydrogen ion, sulfate ion, dihydrogen phosphate ion, humic acid, make the concentration of chloride ion, bicarbonate ion, sulfate ion and dihydrogen phosphate ion, humic acid in the solution be 5.0mM, 5.0mM respectively mM, 5.0mM, 5.0mM, 5.0mM, 5.0mg / L; Add simultaneously the monoatomic cobalt catalyst (Co-N / C) and peroxomonosulfate ( PMS) initiates the reaction, makes the dosage of Co-N / C and PMS be 0.08g / L and 0.5mmol / L respectively in the system. The reaction was carried out in a water-bath shaker with a rotation speed of 150 rpm, a...

Embodiment 3

[0058] A method utilizing nitrogen-doped porous carbon anchored monoatomic cobalt catalyst (Co-N / C) to activate persulfate to degrade organic pollutants in water, comprising the following steps:

[0059]Take 100 mL of sulfamethazine solution with a molar concentration of 50.0 μM in a 250 mL Erlenmeyer flask. The solvents are ultrapure water, tap water, Xiangjiang water (Changsha section of Xiangjiang River) and lake water (Changsha Taozi Lake). Salt buffer solution controls the pH of the solution at 7.0 ± 0.1, and simultaneously adds the nitrogen-doped porous carbon anchored single-atom cobalt catalyst (Co-N / C) and peroxymonosulfate (PMS) prepared in Example 1 to initiate the reaction , where the doses of Co-N / C and PMS in the reaction system were 0.08g / L and 0.5mmol / L, respectively. The reaction was carried out in a water-bath shaker with a rotation speed of 150 rpm, a temperature of 30° C., and a time of 60 minutes to complete the degradation of sulfamethazine in water. The...

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Abstract

The invention discloses a method for degrading organic pollutants in water by using a nitrogen-doped porous carbon anchored monatomic cobalt catalyst to activate persulfate. The method comprises the following steps: mixing the nitrogen-doped porous carbon anchored monatomic cobalt catalyst, persulfate and organic pollutant-containing water, and carrying out degradation reaction to degrade organicpollutants in water, wherein the nitrogen-doped porous carbon anchored monatomic cobalt catalyst comprises nitrogen-doped porous carbon, and monatomic cobalt is doped in the nitrogen-doped porous carbon. The method for degrading the organic pollutants in the water by utilizing a nitrogen-doped porous carbon anchored monatomic cobalt catalyst to activate persulfate has the advantages of strong water quality interference resistance, high degradation efficiency, environmental protection and the like, can efficiently remove the organic pollutants in the water, and is high in use value and good inapplication prospect.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and relates to a method for using a single-atom cobalt catalyst anchored by nitrogen-doped porous carbon to activate persulfate to degrade organic pollutants in water. Background technique [0002] In recent years, the application of persulfate-based advanced oxidation technology in water purification has attracted widespread attention, due to the advantages of various activation methods, high yield of reactive substances and wide application range. Persulfate can be activated by ultraviolet irradiation, heat, alkali, ultrasound and catalysts to produce highly reactive substances, thereby efficiently degrading stubborn organic pollutants. At present, the activation method with the best catalytic performance is to add cobalt ions, but its toxicity is relatively high. Although it is prepared as a solid-phase catalyst by loading or immobilizing it on a carrier, the dissolution of co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J27/24C02F101/30C02F101/38C02F101/34
CPCC02F1/725C02F1/722B01J27/24C02F2101/30C02F2101/40C02F2101/345C02F2101/38
Inventor 吴少华陈俊旭杨春平李祥钟敏健卢晓晴李翔吴丹晴
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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