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Method for degrading organic matters in water by synergistically activating permanganate-persulfate through cathode and anode

A technology of permanganate and persulfate, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of small scope of application, low activation efficiency, secondary pollution, etc., and achieve low prices. , Improve the treatment effect, the effect of enhanced reactivity

Active Publication Date: 2021-06-25
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a method for synergistically activating permanganate-persulfate to degrade organic matter in water by cathode and anode, so as to solve the problems of low activation efficiency and secondary Pollution, small scope of application and high energy consumption

Method used

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  • Method for degrading organic matters in water by synergistically activating permanganate-persulfate through cathode and anode
  • Method for degrading organic matters in water by synergistically activating permanganate-persulfate through cathode and anode
  • Method for degrading organic matters in water by synergistically activating permanganate-persulfate through cathode and anode

Examples

Experimental program
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Effect test

Embodiment 1

[0047]Prepare diclofenac solution with a concentration of 40 μM, take 200mL diclofenac solution into five clean 250mL beakers, and inject it into the reaction chamber containing the negative / positive electrode system (electrode material is titanium-plated platinum electrode), and then pour into each reaction chamber Sodium persulfate was added to make the concentration of sodium persulfate reach 0.5mM. At the same time, potassium permanganate was added to each reaction chamber to make the concentration of potassium permanganate reach 0.02mM, 0.04mM, 0.08mM, respectively. 0.10mM and 0.12mM. Turn on the power switch and adjust the current to 200mA. Stir at room temperature at a speed of 800rpm for 30min, take 1mL samples at regular intervals for analysis, the results are as follows figure 1 shown.

[0048] As can be seen from the figure, when the concentration of potassium permanganate (PM) is in the range of 0.02 to 0.12mM, with the increase of the concentration of potassium ...

Embodiment 2

[0050] The test procedure is the same as in Example 1, wherein the concentration of potassium permanganate in each diclofenac solution is 0.1 mM, and the concentration of sodium persulfate (PDS) is 0.1 mM, 0.2 mM, 0.3 mM, 0.5 mM and 0.7 mM respectively. The result is as figure 2 shown.

[0051] It can be seen from the figure that when the concentration of sodium persulfate is greater than 0.2mM, the degradation rate of the system of the present invention to diclofenac can reach more than 90%. It can be seen that for low-concentration micro-polluted wastewater, the concentration of sodium persulfate can be selected from 0.01 to 0.7mM. As the concentration of organic matter in wastewater increases, the concentration of potassium permanganate needs to increase accordingly, and the concentration of sodium persulfate can be selected From 0.01 to 1000mM.

Embodiment 3

[0053] The test procedure is the same as in Example 1, wherein the concentration of potassium permanganate in each diclofenac solution is 0.1 mM, and the solution is added with sodium hydroxide or concentrated sulfuric acid solution to adjust the initial pH to 3, 5, 7, 9, 10 and 11 respectively, and the results Such as image 3 shown.

[0054] It can be seen from the figure that under the condition that the initial pH of the solution is 3-10, the degradation rate of the system of the present invention for diclofenac can reach more than 90%.

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Abstract

The method for degrading organic matters in water by synergistically activating permanganate-persulfate through cathode and anode, which comprises the following steps: injecting organic wastewater to be treated into a reaction chamber containing a negative / positive electrode system, then adding permanganate and persulfate into the organic wastewater, externally adding a direct-current power supply, controlling the electrifying current to be 10-800 mA, stirring at room temperature, and reacting for 30-60 minutes to finish the degradation of the organic pollutants in the organic wastewater. The method takes permanganate and persulfate as raw materials, has the advantages of low price, environmental friendliness and easiness in storage and transportation, can realize effective activation and reduce energy consumption only by providing micro-current, is high in operability, simple in equipment and simple and convenient to operate, has very high degradation capacity on organic matters in wastewater, does not have toxic or side effect of products, secondary pollution is avoided, and the method can be popularized and used in large-scale engineering and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for synergistically activating permanganate-persulfate by cathode and anode to degrade organic matter in water. Background technique [0002] Antibiotics are chemical substances that can kill or inhibit the growth of bacteria. Due to their good antibacterial properties, they have been widely used in the fields of human and animal disease prevention, agricultural production, animal husbandry and aquaculture. In recent years, antibiotics can enter the environment through various channels during production and use, and the problem of antibiotic pollution in the water environment has become increasingly serious. Because traditional water treatment processes are difficult to effectively degrade such refractory organics, it will cause such The accumulation of pollutants in the environment poses a great threat to water quality security and the ecological environment. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/467C02F101/10C02F101/30C02F101/36
CPCC02F1/4672C02F2101/30C02F2101/10C02F2101/36
Inventor 赵纯朱莹丁昊杰孙志华于碧玉樊佳慧许劲
Owner CHONGQING UNIV
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