A method for activating persulfate to degrade organic pollutants using multi-level porous biochar

A technology of organic pollutants and persulfate, applied in water pollutants, chemical instruments and methods, water/sewage treatment, etc. problem, to achieve the effect of high-efficiency electron transfer performance, rich nitrogen doping content, and high degree of graphitization

Active Publication Date: 2020-11-13
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water solubility of 2,4-dichlorophenol increases its fluidity, which makes it easier to penetrate into the groundwater through the soil layer, causing groundwater pollution
So far, carbon-based materials such as reduced graphene oxide, carbon nanotubes, nanodiamonds, and mesoporous carbons have been proven to be effective in activating persulfate, but their high preparation costs still limit their wide application.
However, due to the wide source of biomass and simple preparation, biochar materials have shown application potential. However, the currently prepared biochar materials exhibit weak catalytic ability in the persulfate advanced oxidation system, which seriously limits the potential of biomaterials. wide application of
Moreover, the oxidation ability of the persulfate advanced oxidation system is easily affected by the halogen ions, oxyanions and natural organic matter in the water, which greatly reduces its actual oxidation removal ability.

Method used

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  • A method for activating persulfate to degrade organic pollutants using multi-level porous biochar
  • A method for activating persulfate to degrade organic pollutants using multi-level porous biochar
  • A method for activating persulfate to degrade organic pollutants using multi-level porous biochar

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Embodiment 1

[0038] A method for activating persulfate to degrade organic pollutants by using multi-level pore biochar, specifically: using multi-level pore bio-char to activate sodium persulfate to degrade 2,4-dichlorophenol in water, comprising the following steps:

[0039] According to the mass ratio of multi-level pore biochar and 2,4-dichlorophenol in the 2,4-dichlorophenol solution is 2:1, add multi-level pore biochar (PSS-800) to an initial concentration of 100mg / L In the 2,4-dichlorophenol solution (pH=5.41), the adsorption treatment was carried out at 160rpm and 25°C for 60min. The mass ratio of 2,4-dichlorophenol in the dichlorophenol solution is 5:1, sodium persulfate is added to the 2,4-dichlorophenol solution, oxidative degradation is carried out at 160r / min for 120min, after the reaction is completed, the Solid-liquid separation completes the degradation of 2,4-dichlorophenol and recovers multi-level porous biochar.

[0040] In this embodiment, samples were taken to measure ...

Embodiment 2

[0066] A method for activating persulfate to degrade organic pollutants by using multi-level pore biochar, specifically: using multi-level pore bio-char to activate sodium persulfate to degrade 2,4-dichlorophenol in water, comprising the following steps:

[0067] According to the mass ratio of multi-level pore biochar and 2,4-dichlorophenol in 2,4-dichlorophenol solution as 2:1, the multi-level pore biochar (PSS-800) prepared in Example 1 was respectively Added to 2,4-dichlorophenol solutions with pH values ​​of 2.63, 3.84, 5.41, 7.11, 8.47, and 9.36 (the initial concentration of the solution was 100mg / L), and adsorbed at 160rpm and 25°C for 60min to reach After the adsorption equilibrium of 2,4-dichlorophenol, the mass ratio of 2,4-dichlorophenol in persulfate and 2,4-dichlorophenol solution is 5: 1, sodium persulfate is added to 2, In the 4-dichlorophenol solution, oxidative degradation was carried out at 160r / min for 120min. After the reaction was completed, solid-liquid se...

Embodiment 3

[0071] A method for activating persulfate to degrade organic pollutants by using multi-level pore biochar, specifically: using multi-level pore bio-char to activate sodium persulfate to degrade 2,4-dichlorophenol in water, comprising the following steps:

[0072] According to the mass ratio of multi-level pore biochar and 2,4-dichlorophenol in 2,4-dichlorophenol solution as 1:1, 2:1, 3:1 respectively, the multi-level Pore ​​biochar (PSS-800) was added to the 2,4-dichlorophenol solution (pH=5.41) with an initial concentration of 100mg / L, and the adsorption treatment was carried out at 160rpm and 25°C for 60min to achieve 2,4-dichlorophenol After the adsorption equilibrium of chlorophenol, according to the mass ratio of persulfate and 2,4-dichlorophenol in the 2,4-dichlorophenol solution is 5:1, add sodium persulfate to the 2,4-dichlorophenol solution In the process, oxidative degradation was carried out at 160r / min for 120min. After the reaction was completed, solid-liquid sepa...

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Abstract

The invention discloses a method using hierarchical porous biochar to activate persulfate in order to degrade organic pollutants. The method adopts the hierarchical porous biochar and the persulfate to treat the organic pollutants, wherein the hierarchical porous biochar is prepared through calcination of shrimp shells, used as a raw material, at 700-900 DEG C and acid modification. The method adopting the hierarchical porous biochar and the persulfate to treat the organic pollutants can realize the efficient removal of the organic pollutants, has the advantages of simplicity in operation, short cycle, easiness in recovery and reuse, high degradation efficiency, good removal effect and high anti-interference ability, can rapidly and efficiently degrade the organic pollutants under acidic and neutral conditions, also can efficiently and rapidly degrade the organic pollutants under an alkaline condition, and has an excellent application prospect in actual organic pollutant wastewater andpolluted natural water.

Description

technical field [0001] The invention belongs to the field of advanced oxidation treatment of phenolic pollutants, and relates to a method for activating persulfate to degrade organic pollutants by using biomass materials, in particular to a method for activating persulfate to degrade organic pollutants by using multi-level pore biochar method. Background technique [0002] The environmental pollution caused by organic pollutants has become increasingly serious and has received more and more attention. Take 2,4-dichlorophenol as an example. 2,4-Dichlorophenol is an important organic chemical intermediate product, mainly used in organic synthesis. In the pesticide industry, it is mainly used to produce the insecticide phenanophos and the herbicide oxadiazone, methyl ester, 2,4-dichlorophenoxy series acids and their esters; in the pharmaceutical industry, it is used to produce anthelmintics Thiodichlorophene; used in the auxiliary industry to produce antifungal agent TCS. H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/72C02F101/34C02F101/36
CPCC02F1/283C02F1/725C02F2101/345C02F2101/36
Inventor 汤琳余江芳曾光明邹佳婧冯程洋冯浩朋王敬敬任晓雅
Owner HUNAN UNIV
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