Ag+-Fe2+ activated persulfate, method for degrading pollutants and application

A technology for activating persulfate and persulfate, applied in the field of pollutant treatment, can solve the problems of high cost and easy inactivation, and achieve the effects of complete degradation, saving operation time and avoiding side reactions.

Active Publication Date: 2018-12-21
BEIJING UNIV OF AGRI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The second object of the present invention is to provide above-mentioned Ag + -Fe 2+ A method for synergistically activating a persulfate system to degrade organic pollutants, the present invention makes Ag + -Fe 2+ It can jointly activate sodium persulfate to generate an appropriate amount of sulfate radicals, overcoming the high cost caused by the use of precious metal silver compounds and the use of Fe alone 2+ deactivation problem

Method used

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  • Ag+-Fe2+ activated persulfate, method for degrading pollutants and application
  • Ag+-Fe2+ activated persulfate, method for degrading pollutants and application
  • Ag+-Fe2+ activated persulfate, method for degrading pollutants and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) Selection of iron ion source:

[0044] The source of ferrous iron selected in this embodiment is ferrous sulfate heptahydrate.

[0045] 2) Selection of persulfate:

[0046] The persulfate selected in this embodiment is sodium persulfate.

[0047] 3) Choice of silver ion source: silver nitrate.

[0048] 4) The specific degradation process is implemented according to the following steps:

[0049] Get p-chlorophenol aqueous solution (concentration is 20mg / L), add Ag+, Fe 2+ and sodium persulfate, and make Ag + : Fe 2+ : The molar ratio of sodium persulfate is 9:8:3, the pH value is adjusted to 3, the total volume is 50ml, and the shaker is shaken at 10°C and 200rpm for 10-20min;

[0050] Get 3ml of the treated solution in a 10ml centrifuge tube, extract it with an equal volume of ethyl acetate, pass through a 0.22 μm water filter, measure the concentration of p-chlorophenol (4-CP) in the system by high performance liquid chromatography, and calculate The degradat...

Embodiment 2

[0052] 1) Selection of iron ion source:

[0053] The source of ferrous iron selected in this embodiment is ferrous acetate and ferrous sulfate heptahydrate.

[0054] 2) Selection of persulfate:

[0055] The persulfate selected in this embodiment is sodium persulfate.

[0056] 3) Choice of silver ion source: silver nitrate.

[0057] 4) The specific degradation process is implemented according to the following steps:

[0058] Get p-chlorophenol aqueous solution (concentration is 20mg / L), add Ag+, Fe 2+ and sodium persulfate, and make Ag + : Fe 2+ : The molar ratio of sodium persulfate is 1:1:10, the pH value is adjusted to 6, the total volume is 50ml, and the shaker is shaken at 45°C and 250rpm for 50-60min;

[0059] Get 3ml of the treated solution in a 10ml centrifuge tube, extract it with an equal volume of ethyl acetate, pass through a 0.22 μm water filter, measure the concentration of p-chlorophenol (4-CP) in the system by high performance liquid chromatography, and ca...

Embodiment 3

[0061] 1) Selection of iron ion source:

[0062] The source of ferrous iron selected in this embodiment is ferrous chloride tetrahydrate.

[0063] 2) Selection of persulfate:

[0064] The persulfates selected in this embodiment are potassium persulfate and sodium persulfate.

[0065] 3) Choice of silver ion source: silver nitrate.

[0066] 4) The specific degradation process is implemented according to the following steps:

[0067] Get p-chlorophenol aqueous solution (concentration is 20mg / L), add Ag+, Fe 2+ and sodium persulfate, and make Ag + : Fe 2+ : The molar ratio of sodium persulfate is 2:2:9, the pH value is adjusted to 4-5, the total volume is 50ml, and the shaker is shaken at 40°C and 210rpm for 30-40min;

[0068] Get 3ml of the treated solution in a 10ml centrifuge tube, extract it with an equal volume of ethyl acetate, pass through a 0.22 μm water filter, measure the concentration of p-chlorophenol (4-CP) in the system by high performance liquid chromatograph...

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Abstract

The invention provides an Ag+-Fe2+ synergistic persulfate activating system and a method for degrading organic pollutants thereof. The synergistic activating system is composed of Ag+, Fe2+ and persulfate; the method for degrading the organic pollutants by means of the persulfate comprises the steps that 1, the Ag+-Fe2+ synergistic persulfate activating system is added into a to-be-treated compound aqueous solution and wastewater containing the organic pollutants, and a pH value of a reaction system is controlled to be 3-7; 2, at 15-50 DEG C, degradation treatment is conducted for 5-60 min. The Ag+-Fe2+ synergistic persulfate activating system forms a compound persulfate activation system, through Ag+-Fe2+ synergistic action, the purpose of activating the persulfate jointly is achieved, the reaction rate is improved, the degradation effect is improved, and advanced degradation of the pollutants is achieved.

Description

technical field [0001] The invention relates to the field of pollutant treatment, in particular to an Ag + -Fe 2+ Synergistically activated persulfate system and its method and application for degrading organic pollutants. Background technique [0002] It and its derivatives are the main pollutants in the wastewater produced by industrial processes such as petroleum refining, papermaking, pharmaceutical and polymer resin production, and have a wide range of sources in industrial wastewater. Phenol is acutely toxic. Even if the human body ingests a small amount, it will cause poisoning symptoms such as dizziness and itching. Long-term exposure may cause cancer. In the list of carcinogens released by the International Agency for Research on Cancer of the World Health Organization, phenol is in the third category of carcinogens. Chlorophenols are important raw materials and intermediates in chemical processing, and are widely used in the production of fine chemicals such as ...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F101/34C02F101/36C02F103/30
CPCC02F1/722C02F2101/345C02F2101/36C02F2103/30C02F2305/02
Inventor 郑燕英陆艺飞靳永胜李晓薇刘欣玮付雪晴韩飞罗健吴峥郑鑫阳程培焱
Owner BEIJING UNIV OF AGRI
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