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Method for realizing disinfection by activating persulfate through synergistic effect of three-dimensional electrode primary battery and ferrous ions

A technology of activating persulfate and three-dimensional electrodes, which is applied in the field of water treatment, can solve the problems of application limitations, high cost, and high current requirements, and achieve the effects of simple equipment, low energy consumption, easy and safe operation

Active Publication Date: 2018-11-30
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the vast majority of three-dimensional electrode electrochemical reactors use electrolytic cells, which require high current and high cost, which limits the application

Method used

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  • Method for realizing disinfection by activating persulfate through synergistic effect of three-dimensional electrode primary battery and ferrous ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of disinfection method of three-dimensional electrode primary battery synergistic ferrous activation of persulfate, the specific operation steps are as follows:

[0025] Configure a three-dimensional electrode primary battery system in a constant temperature magnetic stirring water bath, that is, connect the negative electrode of iron sheet and the positive electrode of graphite to form a primary battery, then add 10g / L particle electrode (activated carbon particles), put it into a 200mL beaker, and the beaker is filled with electrolyte Na 2 SO 4 The solution is 0.05M / L, and the concentration of sodium persulfate is 2mM / L. The temperature is 25°C, the initial pH is 6-7, and the reaction is 40 minutes. The strain selected is multi-drug resistant E. 7 CFU / mL, the bactericidal rate is 99.9999%. The results of the disinfection process are shown in Table 1.

[0026] Table 1

[0027] time / min

Embodiment 2

[0029] A kind of disinfection method of three-dimensional electrode primary battery synergistic ferrous activation of persulfate, the specific operation steps are as follows:

[0030] Configure a three-dimensional electrode primary battery system in a constant temperature magnetic stirring water bath, that is, connect the negative electrode of iron sheet and the positive electrode of graphite to form a primary battery, then add 10g / L particle electrode (activated carbon particles), put it into a 200mL beaker, and the beaker is filled with electrolyte Na 2 SO 4 The solution is 0.05M / L, and the concentration of sodium persulfate is 2mM / L. The temperature is 25°C, the initial pH is 6-7, and the reaction is 40 minutes. The selected strain is Escherichia coli, and the initial concentration is 10 7 CFU / mL, the bactericidal rate is 99.9999%. The results of the disinfection process are shown in Table 2.

[0031] Table 2

[0032] time / min

Embodiment 3

[0034] A kind of disinfection method of three-dimensional electrode primary battery synergistic ferrous activation of persulfate, the specific operation steps are as follows:

[0035] Configure a three-dimensional electrode primary battery system in a constant temperature magnetic stirring water bath, that is, connect the negative electrode of the iron sheet and the positive electrode of graphite to form a primary battery, then add 2.5g / L particle electrode (activated carbon particles), put it into a 200mL beaker, and the beaker is filled with electrolyte Na 2 SO 4 The solution is 0.05M / L, and the concentration of sodium persulfate is 2mM / L. The temperature is 25°C, the initial pH is 6-7, and the reaction is 40 minutes. The strain selected is multi-drug resistant E. 7 CFU / mL, the bactericidal rate is 99.9993%. The results of the disinfection process are shown in Table 3.

[0036] table 3

[0037] time / min

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Abstract

The invention discloses a method for realizing disinfection by activating persulfate through the synergistic effect of a three-dimensional electrode primary battery and ferrous ions. The method comprises the following steps that sodium sulfate (electrolytes), activated carbon particles (a particle electrode), an iron sheet (a negative electrode) and graphite (a positive electrode) are added into acontainer, and the positive electrode and the negative electrode are connected through a wire so as to construct the three-dimensional electrode primary battery; the persulfate and a bacterium solution are added, and the iron sheet loses electrons to generate Fe<2+> to enter the solution under the action of the original battery with the iron sheet serving as the negative electrode; and the electricity generated by the primary battery cooperates with the Fe<2+> to activate the persulfate to generate free sulfate radicals so as to be used for killing microorganisms. The method has the advantages that the particle electrode is added to a two-dimensional electrode primary battery system to form the three-dimensional electrode primary battery, redox reaction of electron gain or loss is carriedout in the particle electrode, so that the electricity generating capacity of the primary battery is obviously improved, and the reaction rate is further increased; and the method is simple in process, low in electrode cost and free of secondary pollution, can generate the current spontaneously, has an efficient disinfecting function and has a wide development prospect.

Description

technical field [0001] The invention relates to a disinfection method of a three-dimensional electrode primary battery in cooperation with ferrous activation of persulfate, belonging to the technical field of water treatment. Background technique [0002] Nowadays, the shortage of water resources is severe, and the reuse of reclaimed water is one of the effective ways to increase the available water resources, but the water must be strictly disinfected before it can be reused. Moreover, the drug-resistant bacteria caused by the abuse of antibiotics has spread and spread rapidly all over the world. If the sewage that has not been effectively disinfected is discharged into the environment, the bacteria carrying the drug-resistant gene will spread the drug resistance to other non-resistant bacteria. Serious threat to human life and health. In order to ensure water safety, we need to develop efficient disinfection methods to treat sewage. [0003] Existing traditional disinfec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/46C02F1/50
CPCC02F1/4606C02F1/50
Inventor 张玲玲马鸿坤黄心眉丁薇李子富
Owner UNIV OF SCI & TECH BEIJING
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