Activation of persulfate, method of removing pollutants, application

A technology for activating persulfate and persulfate, which is applied in the field of pollutant treatment, can solve the problems of inability to remove nitrate nitrogen and simultaneous removal of COD and TN, so as to improve degradation efficiency and removal effect, high-efficiency activation, The effect of broad application prospects

Active Publication Date: 2021-07-27
BEIJING UNIV OF AGRI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the system of reducing nitrate nitrogen with iron is greatly affected by the pH value. It has been reported that when the pH value is > 4, the reaction between Fe and nitrate radicals stops, and ammonium ions are easily formed, which cannot realize nitrate nitrogen in the true sense. removal of
At present, there is no ideal method that can simultaneously remove COD and TN in sewage

Method used

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  • Activation of persulfate, method of removing pollutants, application
  • Activation of persulfate, method of removing pollutants, application
  • Activation of persulfate, method of removing pollutants, application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1) Selection of iron ion source:

[0048] The source of ferrous iron selected in this embodiment is ferrous sulfate heptahydrate.

[0049] 2) Selection of persulfate:

[0050] The persulfate selected in this embodiment is sodium persulfate.

[0051] 3) Selection of complexing agent: acetylacetone

[0052] 4) The specific degradation process is implemented according to the following steps:

[0053] Take an aqueous solution of p-chlorophenol (concentration: 20mg / L) within the range of pH 10-12, add acetylacetone: Fe 2+ : The molar ratio of sodium persulfate is 1:20:8, the total volume is 50ml, and the reaction degradation is carried out at 30°C and 200rpm shaking table for 25min;

[0054] Take 3ml of the reaction-degraded solution in a 10ml centrifuge tube, extract it with an equal volume of ethyl acetate, pass through a 0.22um water filter membrane, and perform 20 minutes of HPLC to detect that the degradation rate of p-chlorophenol (4-CP) is 95%. The landfill leach...

Embodiment 2

[0056] 1) Selection of iron ion source:

[0057] The source of ferrous iron selected in this embodiment is ferrous acetate and ferrous sulfate heptahydrate.

[0058] 2) Selection of persulfate:

[0059] The persulfate selected in this embodiment is sodium persulfate.

[0060] 3) Selection of complexing agent: acetylacetone

[0061] 4) The specific degradation process is implemented according to the following steps:

[0062] Take an aqueous p-chlorophenol solution (concentration of 20mg / L) adjusted to a pH value of 8-9, add acetylacetone: Fe 2+ : The molar ratio of sodium persulfate is 5:1:1, the total volume is 50ml, and the reaction degradation is carried out at 35°C and 210rpm shaking table for 30min;

[0063] Take 3ml of the reaction-degraded solution in a 10ml centrifuge tube, extract with an equal volume of ethyl acetate, pass through a 0.22um water filter membrane, and use HPLC for 20 minutes to detect that the degradation rate of p-chlorophenol (4-CP) is 96%. The l...

Embodiment 3

[0065] 1) Selection of iron ion source:

[0066] The source of ferrous iron selected in this embodiment is ferrous chloride tetrahydrate.

[0067] 2) Selection of persulfate:

[0068] The persulfates selected in this embodiment are potassium persulfate and sodium persulfate.

[0069] 3) Selection of complexing agent: acetylacetone

[0070] 4) The specific degradation process is implemented according to the following steps:

[0071] Take an aqueous p-chlorophenol solution (concentration of 20mg / L) adjusted to a pH value of 8-9, add acetylacetone: Fe 2+ : The molar ratio of sodium persulfate is 2:15:7, the total volume is 50ml, and the reaction degradation is carried out at 20°C and 250rpm shaking table for 60min;

[0072] Take 3ml of the degraded solution in a 10ml centrifuge tube, extract it with an equal volume of ethyl acetate, pass it through a 0.22um water filter membrane, and use high performance liquid chromatography to detect that the degradation rate of p-chlorophe...

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Abstract

The invention provides a kind of acetylacetone joint ferrous ion activated persulfate system and its method and application for removing pollutants. The ferrous coordination activated persulfate system will be composed of acetylacetone, Fe 2+ And the composition of persulfate, the method for removing pollutants by persulfate includes: adding the ferrous coordination activated persulfate system to the wastewater containing organic pollutants and nitrogen-containing pollutants to be treated, the pH value of the reaction system Control between 2-12; 15-50°C degradation treatment for 5-60min is enough. The ferrous iron coordination activated persulfate system of the present invention forms a composite activated persulfate system, which can effectively 2+ Protection mechanism to achieve the purpose of activating persulfate without causing unnecessary consumption of persulfate.

Description

technical field [0001] The invention relates to the field of pollutant treatment, in particular to an advanced persulfate oxidation system activated by acetylacetone combined with ferrous ions, and a method and application thereof for deeply degrading pollutants. Background technique [0002] With the rapid development of my country's economy and the deepening of urbanization, the amount of industrial wastewater and domestic waste has increased, and environmental pollution has become increasingly serious. In recent years, environmental governance has attracted much attention, among which the problem of water pollution is the most urgent. Excessive levels of COD and nitrogen in water bodies are a major problem in environmental governance today. The higher the COD value in the water body, the more serious the organic pollution. Severe excess of nitrogen will lead to eutrophication of the water body, leading to the proliferation of algae, reducing the dissolved oxygen content...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F101/16C02F101/30C02F101/38C02F101/36
CPCC02F1/72C02F2101/16C02F2101/30C02F2101/36C02F2101/38
Inventor 靳永胜李晓薇郑燕英陆艺飞付雪晴韩飞刘欣玮吴峥罗健郑鑫阳程培焱
Owner BEIJING UNIV OF AGRI
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