Method of using sulfite enhanced divalent copper to catalyze persulfate oxidation to degrade organic pollutants

A technology of persulfate oxidation and organic pollutants, applied in water pollutants, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problem of low degradation efficiency of organic pollutants, low sulfate radical yield, startup Long response time and other problems, to achieve the effect of shortening start-up time, wide application range and fast speed

Inactive Publication Date: 2019-08-16
UNIV OF JINAN
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve key problems such as low yield of sulfate radicals in the divalent copper / persulfate system, low degradation efficiency of organic pollutants, long start-up reaction time, large sludge output, etc., and proposes a method to accelerate the conversion of divalent copper to Copper conversion, a new method to promote the yield of sulfate radicals and improve the degradation efficiency of organic pollutants

Method used

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  • Method of using sulfite enhanced divalent copper to catalyze persulfate oxidation to degrade organic pollutants
  • Method of using sulfite enhanced divalent copper to catalyze persulfate oxidation to degrade organic pollutants

Examples

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Effect test

Embodiment example 1

[0020] (1) Use perchloric acid and potassium hydroxide to adjust the pH value of domestic sewage containing sulfamethoxazole to 7;

[0021] (2) Add 10 µM copper nitrate to the water sample to be treated, then add a certain amount of potassium persulfate solution and sodium sulfite solution, wherein the ratio of divalent copper to sodium sulfite and potassium persulfate is 1:50:500, and stir well Mix and take samples at different sampling points, and the effective degradation of sulfamethoxazole can be achieved after 10 minutes.

[0022] In this implementation case, a sulfite-enhanced divalent copper-catalyzed persulfate oxidation degradation method for organic pollutants has a degradative effect on sulfamethoxazole in water as shown in the attached figure 1 shown. From attached figure 1 It can be seen that the divalent copper / peroxymonosulfate system can only degrade 10% of sulfamethoxazole in 10 minutes; the sulfite / divalent copper system has only 20% removal rate of sulfam...

Embodiment example 2

[0024] In specific implementation case 2, sulfamethoxazole in step (1) was replaced with carbamazepine, estrone, nonylphenol, aspirin, chloramphenicol, penicillin, diclofenac, naproxen, ibuprofen, triclosan, Any organic pollutant in ciprofloxacin, ofloxacin, norfloxacin, sulfamethazine, sulfamethazine, other steps are exactly the same as the implementation case 1.

[0025] In this implementation case 2, the method of sulfite-enhanced divalent copper catalyzed oxidation and degradation of organic pollutants by persulfate has a degradative effect on other pollutants in the water body as shown in the appendix figure 2 As shown, it can be seen from the figure that the method of sulfite-enhanced divalent copper-catalyzed oxidation of persulfate to degrade organic pollutants has a good removal effect on a variety of emerging micro-pollutants.

specific Embodiment example 3

[0027] Specific implementation example 3 adjusts the pH value of the water sample to be treated in step (1) to any one of 6, 8, 9, 10, and 11, and other steps are exactly the same as implementation example 1.

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Abstract

The invention discloses a method of using sulfite enhanced divalent copper to catalyze persulfate oxidation to degrade organic pollutants. Due to the reducing performance of sulfite, the conversion ofdivalent copper ions into monovalent copper ions is promoted; the yield of sulfate radicals is increased, and the degradation efficiency of organic pollutants is improved. The water treatment comprises following steps: adjusting the pH value to 6-11; adding a certain amount of divalent copper ions into a water sample to be processed, then adding a certain amount of a potassium sulfate solution and a sodium sulfite solution, fully stirring and mixing, and carrying out reactions for 5 to 30 minutes to effectively degrade the organic pollutants. The problems of a conventional divalent copper catalyzed persulfate system such as long start period, low yield of sulfate radicals, a large amount of added divalent copper ions, a large amount of generated sludge, and the like are solved. At the same time, the method has the advantages of high active group yield, good organic pollutant removing efficiency, convenient operation, and low operation cost.

Description

technical field [0001] The invention relates to the field of water treatment, and specifically relates to a method for sulfite-enhanced divalent copper-catalyzed persulfate oxidation to degrade organic pollutants. Background technique [0002] With the enhancement of people's awareness of environmental protection and the continuous improvement of environmental analysis technology, emerging trace organic pollutants are increasingly attracting global attention. Emerging trace organic pollutants mainly include: endocrine disruptors and pharmaceuticals and personal care products. Although the concentration of emerging micro-organic pollutants in water is generally in the range of ng / L-µg / L, there are various types of emerging micro-organic pollutants in the form of compound pollution, and the extensive use of emerging micro-pollutants leads to their continuous discharge. In the water environment, a "false persistence" phenomenon is formed in the water environment. Emerging micr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/30
CPCC02F1/722C02F1/725C02F2101/30
Inventor 孙绍芳邱立平张守彬王嘉斌谢康刘贵彩高明昌
Owner UNIV OF JINAN
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