CN109081401B - Method for degrading pollutants in water by synchronously exciting persulfate-ozone by cathode and anode - Google Patents
Method for degrading pollutants in water by synchronously exciting persulfate-ozone by cathode and anode Download PDFInfo
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Abstract
The invention discloses a method for degrading pollutants in water by synchronously exciting persulfate-ozone by a cathode and an anode, which specifically comprises the following steps: injecting organic wastewater to be treated into a reaction chamber, starting a direct-current voltage-stabilized power supply, adding ozone and persulfate solution at the same time, and treating for a certain time under the action of an electric field under the conditions that the adding amount of the ozone is 1-500 mg/L and the concentration of the persulfate is 0.1-20 mM. The method has the advantages of fast reaction time, high oxidation efficiency, no secondary pollution, wide pH application range, simple and convenient operation, thorough treatment, low energy consumption and the like. Meanwhile, the generation of a toxic byproduct bromate in the ozone oxidation process is effectively inhibited, and the product has no toxic or side effect. The method can be popularized and used in large-scale engineering, and has good application prospect.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a method for degrading pollutants in water by synchronously exciting persulfate-ozone by a cathode and an anode.
Background
Along with the increase of population and the continuous promotion of industrialization process, a large amount of chemical products such as pesticides, insecticides, chemical fertilizers and the like are used, and organic matters are discharged into a water body in a non-point source pollution mode; the urban sewage and industrial wastewater discharge organic matters into water in the form of point source pollution, the organic matters entering the water body cause serious pollution to the environment, wherein the organic pollutants which are difficult to degrade biologically are the most difficult to treat, the organic matters are difficult to remove by the conventional treatment technology, and the organic pollutants are frequently detected in surface water and underground water, which poses great threats to water quality safety guarantee and ecological environment, so that the research on the degradation of the organic matters which are difficult to degrade in water is urgent.
The advanced oxidation technology has the characteristics of high efficiency, no selectivity, thorough oxidation and the like for degrading pollutants in water, has an obvious effect on the aspect of degrading organic pollutants in water, and is a key direction for researching and degrading the organic pollutants in water at present. At present, the invention patent CN1789150A mainly discloses a method for removing organic matters by utilizing photoelectric Fenton reaction, the removal rate of 6h is 95.7%, although the removal efficiency is good, the problem that secondary pollution is caused by introduced iron ions after long time; the invention patent CN103318990A discloses a method for removing organic pollution in water by electrochemical cathode catalytic ozonation, the removal rate of atrazine in 15min is 89%, but the problems of excessive ozone dosage, high energy consumption and the like exist; the invention patent CN103342405A discloses a method for degrading organic pollutants in water by activating persulfate through an electrochemical cathode, which avoids secondary pollution caused by an additional catalyst, but has a slow degradation rate on atrazine for a long time; the invention patent CN104591370A discloses a water treatment method by using persulfate to catalyze ozone, wherein the removal rate of atrazine reaches 99% within 30min, but the problems of too large ozone adding amount, high energy consumption and low free radical production efficiency exist.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for degrading pollutants in water by synchronously exciting persulfate-ozone by a cathode and an anode, and solves the problems of secondary pollution, large oxidant adding amount, high energy consumption, low free radical generation efficiency and the like in the existing advanced oxidation method for degrading organic pollutants.
In order to solve the technical problems, the invention adopts the following technical scheme: the method for degrading pollutants in water by synchronously exciting persulfate-ozone by the cathode and the anode comprises the following steps:
injecting organic wastewater to be treated into a reaction chamber containing a cathode/anode electrode system, adding electrolyte into the organic wastewater to enable the conductivity to reach 50-500 mu s/cm, and simultaneously turning on a direct current stabilized power supply to control the current density to be 10-200 mA/cm2And then adding ozone and persulfate into the organic wastewater, and performing electric field treatment under the conditions that the adding amount of the ozone is 1-500 mg/L and the concentration of the persulfate is 0.1-20 mM, so as to finish the treatment of the organic pollutants in the organic wastewater.
Under electrochemical action, persulfate ions and negatively charged organic contaminants (at a specific pH, pka)<pH) can be adsorbed on the anode, on one hand, persulfate can generate non-radical oxidation at the anode to adsorb and degrade organic matters, and on the other hand, persulfate can generate electron losing reaction at the anode to directly generate sulfate radical (E)02.5-3.1V versus NHE) to degrade organic matters. The electrochemical cathode transfers electrons toOzone, generating hydroxyl radical (E)01.89-2.72V vs. NHE), and under the condition of natural water quality, hydroxyl radicals rapidly decompose organic matters. Meanwhile, the electric field cathode catalyzes persulfate to generate sulfate radicals, and the ozone catalyzes persulfate to generate hydroxyl radicals and sulfate radicals to synergistically oxidize and degrade organic pollutants, so that the efficiency of generating the hydroxyl radicals and the sulfate radicals is greatly improved. Because ozone and persulfate are added into the reactor at the same time, the mass transfer efficiency is enhanced, and a large amount of fine bubbles generated by electrolysis between the cathode plate and the anode plate and between the cathode plate and the anode plate are promoted, on one hand, the contact area of ozone gas is increased, ozone is promoted to enter a liquid phase in a large amount or react at a gas-liquid interface, the utilization efficiency of ozone is improved, the generation of hydroxyl radicals is promoted, on the other hand, the full contact of ozone and persulfate is also promoted, and the efficiency of catalyzing persulfate by ozone to generate hydroxyl radicals and sulfate radicals in solution is improved. Meanwhile, the cathode uses a carbon-based material electrode, so that bromate generated by ozone oxidation can be effectively reduced, and secondary pollution is avoided. It can be seen that a coupling oxidation system exists among the ozone oxidation method, the electrochemical catalysis method and the persulfuric acid oxidation method, and the treatment efficiency of the coupling oxidation system on organic matters is far higher than that of the electrochemical cathode catalytic ozone oxidation method, the persulfate catalytic ozone method or the electrochemical cathode catalytic persulfate method, and is not the sum of simple superposition of the oxidation methods.
The hydroxyl free radical can not selectively oxidize pollutants due to the characteristics of strong oxidizing property and non-selectivity of the hydroxyl free radical, but the half life period of the hydroxyl free radical is short (10)-3Mus), and the half-life time (30-40 mus) of the sulfate radical is longer, so that the sulfate radical and the solution can be mutually cooperated to efficiently degrade organic pollutants in a cathode, an anode and the solution, the degradation time is greatly shortened, the utilization efficiency of added substances is improved, the energy consumption is reduced, and the secondary pollution is avoided. The reaction formula of the reaction in the above process is as follows: anode non-radical degradation:
M-contaminant+O3——→…——→CO2+H2O (2)
degradation of anode free radicals:
SO4 ·--+contaminant——→…——→CO2+H2O (4)
degradation of cathode free radicals:
S2O8 2-/HSO5 -+e-——→SO4 ·-+SO4 2- (5)
SO4 ·-+H2O——→HO·+SO4 2-+H+ (6)
O2+2H++2e-——→H2O2 (7)
O3+H2O2——→H2O+HO2 ·+HO·+O2 (8)
SO4 ·--+contaminant——→…——→CO2+H2O (10)
HO·-+contaminant——→…——→CO2+H2O (11)
degradation of the solution:
Contaminant+O3——→…——→CO2+H2O (12)
O3+S2O8 2-/HSO5 -——→SO4 ·-+HO· (13)
SO4 ·--+contaminant——→…——→CO2+H2O (14)
HO·-+contaminant——→…——→CO2+H2O (15)
removal of disinfection by-product bromate:
C+BrO3 -/BrO-——→CO2+Br- (16)
further, the electric field treatment time is 5-30 min.
Further, the electrolyte is one or more of hydrochloride, phosphate, nitrate, carbonate, bicarbonate and sulfate. The ionic strength in the electrolytic cell can be increased by adding electrolyte, and the electrochemical catalysis process is further promoted.
Wherein, the hydrochloride is selected from one or more of sodium chloride, potassium chloride and magnesium chloride, the phosphate is selected from one or more of sodium monohydrogen phosphate, sodium dihydrogen phosphate, sodium phosphate, potassium monohydrogen phosphate, potassium dihydrogen phosphate and potassium phosphate, the nitrate is selected from one or more of sodium nitrate, potassium nitrate, ammonium nitrate and calcium nitrate, the carbonate is selected from one or more of sodium carbonate, potassium carbonate and magnesium carbonate, the bicarbonate is selected from one or more of sodium bicarbonate, potassium bicarbonate and ammonium bicarbonate, and the sulfate is selected from one or more of sodium sulfate, potassium sulfate and magnesium sulfate.
Further, the electrode system comprises a two-dimensional electrode system and a three-dimensional electrode system; the filler of the three-dimensional electrode system is one or more of columnar activated carbon, granular activated carbon, steel slag particles, ceramsite and quartz sand. Wherein, the anodes and the cathodes of the two-dimensional electrode system and the three-dimensional electrode system have the characteristics of strong catalytic capability and large specific area.
Further, the persulfate is directly added in a solid form or added in a form of a persulfate mixture aqueous solution. The persulfate is peroxymonosulfate and/or peroxydisulfate; the peroxymonosulfate is one or more of potassium peroxymonosulfate, sodium peroxymonosulfate, calcium peroxymonosulfate, ammonia peroxymonosulfate and magnesium peroxymonosulfate, and the peroxydisulfate is one or more of potassium persulfate, sodium persulfate, calcium peroxysulfate, ammonia persulfate and magnesium peroxysulfate.
Further, the ozone is added in an aeration mode or in a saturated ozone solution mode.
Further, the anode is a carbon-based electrode, a metal electrode and a composite load electrode thereof or a ceramic electrode.
The carbon-based electrode is a graphene material electrode, a carbon nano material electrode, a carbon fiber electrode, an activated carbon material electrode, a net-shaped glassy carbon electrode or a graphite electrode; the carbon nano material electrode is a carbon nano tube electrode, a fullerene electrode, a carbon nano tube polytetrafluoroethylene electrode or a fullerene polytetrafluoroethylene electrode; the carbon fiber electrode is a carbon fiber cloth electrode, a carbon fiber felt electrode, a carbon fiber wire electrode, a carbon fiber paper electrode or a carbon fiber sponge electrode; the active carbon material electrode is an active carbon particle electrode, an active carbon polytetrafluoroethylene electrode, a carbon tube electrode, a carbon rod electrode, a carbon sponge electrode or a porous active carbon electrode; the graphite electrode is a graphite rod electrode, a graphite wire electrode, a graphite felt electrode, a graphite plate electrode, a graphite sponge electrode, a graphite particle electrode or a porous graphite electrode; the metal electrode is a platinum electrode, a titanium electrode, a copper electrode or a nickel electrode, and the metal electrode is a wire-shaped, rod-shaped or plate-shaped electrode; the electrode in the composite load electrode is a composite electrode modified by one or more of metal, metal oxide and metal hydroxide, and the metal is a metal element in the 4 th to 6 th periods of the periodic table, such as a titanium platinum-plated electrode or a nickel platinum-plated electrode; the ceramic electrode is a nitrogen carbide electrode, a silicon carbide electrode, a tungsten carbide electrode or an Ebonex electrode.
The cathode is a carbon-based material electrode and comprises a graphene material electrode, a carbon nano material electrode, a carbon fiber electrode, an activated carbon material electrode, a net-shaped glassy carbon electrode or a graphite electrode.
Wherein the carbon nano material electrode is a carbon nano tube electrode, a fullerene electrode, a carbon nano tube polytetrafluoroethylene electrode or a fullerene polytetrafluoroethylene electrode; the carbon fiber electrode is a carbon fiber cloth electrode, a carbon fiber felt electrode, a carbon fiber wire electrode, a carbon fiber paper electrode or a carbon fiber sponge electrode; the electrode of the active carbon material is an active carbon particle electrode, an active carbon polytetrafluoroethylene electrode, a carbon tube electrode, a carbon rod electrode, a carbon sponge electrode or a porous active carbon electrode; the graphite electrode is a graphite rod electrode, a graphite wire electrode, a graphite felt electrode, a graphite plate electrode, a graphite sponge electrode, a graphite particle electrode or a porous graphite electrode.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the method, a cathode and an anode are used for synchronously exciting a green oxidant persulfate and ozone to generate sulfate radicals and hydroxyl radicals at room temperature to oxidize and degrade organic matters, the sulfate radicals and the hydroxyl radicals are efficiently generated in the cathode, the anode and a solution, and are used for efficiently removing pollutants in different pH ranges in a synergistic manner, and under the same condition, compared with the method for removing organic pollutants by electrochemical cathode catalytic ozonation, the removal rate of the organic matters is improved by 32-40%; compared with persulfate catalysis ozone treatment of organic pollution, the removal rate of organic matters is improved by 30-35%; compared with the electrically enhanced persulfate organic pollution, the removal rate of the organic matters is improved by 40 to 50 percent; greatly improves the treatment effect of the organic wastewater, and is not the simple superposition of the conventional oxidation method.
2. The method adopts green medicament, is economic and environment-friendly, is convenient to transport and simple to operate, can finish the degradation of organic matters only by inputting small energy, reduces the input of electric energy and the consumption of ozone and persulfate, has high removal efficiency, and can reach 100 percent of the removal rate of the diclofenac within 5 min.
3. The invention effectively inhibits the generation of a disinfection by-product bromate in the ozone oxidation process, and the product has no toxic or side effect. Compared with using Co2+The invention uses clean electric energy to avoid secondary pollution caused by introducing metal ions when metal ions are catalyzed, and simultaneously, the persulfate content in the treated effluent can be ignored, so that the secondary pollution can not be caused.
4. The method has simple operation and flow, has strong degradation capability on organic matters in the wastewater, can be popularized and used in large-scale engineering, and has good application prospect.
Drawings
FIG. 1 is a graph of time-removal rate of organic diclofenac.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
Firstly, injecting organic wastewater to be treated into a reaction chamber containing a cathode/anode electrode system, injecting electrolyte to ensure that the conductivity of the solution reaches 70 mu s/cm, simultaneously opening a direct current stabilized power supply, and controlling the current density to be 15mA/cm2And adding ozone with the adding amount of 5mg/L, then adding peroxymonosulfate to enable the concentration of the peroxymonosulfate to be 0.1mM, and treating for 15min to finish the treatment of organic pollutants in water, wherein the organic wastewater to be treated contains 1 mu mol/L of diclofenac.
In this embodiment, the electrolyte is sodium sulfate, the peroxymonosulfate is added in a solution manner, the peroxymonosulfate is sodium peroxymonosulfate, ozone is added in an aeration manner, the electrode system is a three-dimensional electrode system with filler being granular activated carbon, the anode of the electrode reactor is a titanium platinized electrode, and the cathode of the electrode reactor is a carbon fiber electrode.
Comparative example 1
Firstly, injecting organic wastewater to be treated into a reaction chamber containing a cathode/anode electrode system, injecting electrolyte to ensure that the conductivity of the solution reaches 70 mu s/cm, simultaneously opening a direct current stabilized power supply, and controlling the current density to be 15mA/cm2Adding peroxymonosulfate to make the concentration of the peroxymonosulfate be 0.1mM, and treating for 15min to finish the treatment of organic pollutants in water, wherein the organic wastewater to be treated contains 1 mu mol/L diclofenac.
In the comparative example, the electrolyte is sodium chloride, the peroxymonosulfate is added in a solution manner, the peroxymonosulfate is sodium peroxymonosulfate, the electrode system is a three-dimensional electrode system with filler being granular activated carbon, the anode of the electrode reactor is a titanium platinized electrode, and the cathode of the electrode reactor is a carbon fiber electrode.
Comparative example 2
Injecting organic wastewater to be treated into a reaction chamber, injecting electrolyte to enable the conductivity of the solution to reach 70 mu s/cm, adding ozone, adding peroxymonosulfate to enable the concentration of the peroxymonosulfate to be 0.1mM after the adding amount of the ozone is 5mgL, and treating for 15min to finish the treatment of organic pollutants in water, wherein the organic wastewater to be treated contains 1 mu mol/L of diclofenac.
In the comparative example, the electrolyte is sodium sulfate, the adding of the peroxymonosulfate is performed by adding solution, the peroxymonosulfate is sodium peroxymonosulfate, and the ozone is added by means of aeration.
Comparative example 3
Firstly, injecting organic wastewater to be treated into a reaction chamber, injecting electrolyte to ensure that the conductivity of the solution reaches 70 mu s/cm, opening a direct current stabilized voltage power supply, and controlling the current density to be 15mA/cm2And then adding ozone, and treating for 15min under the condition that the adding amount of the ozone is 5mg/L, so as to finish the treatment of the organic pollutants in the water, wherein the organic wastewater to be treated contains 1 mu mol/L of diclofenac.
The electrolyte in the comparative example is sodium sulfate, ozone is added in an aeration mode, the electrode system is a three-dimensional electrode system with granular activated carbon as a filler, the anode of the electrode reactor is a titanium platinized electrode, and the cathode of the electrode reactor is a carbon fiber electrode.
The concentration change of the diclofenac in the organic wastewater to be treated in the example 1 and the comparative examples 1 to 3 is recorded, the removal rate is calculated, and a time-removal rate curve chart is drawn. As shown in fig. 1.
As can be seen from FIG. 1, under the same conditions, compared with the electrochemical cathode catalysis ozone oxidation treatment of organic pollution, the removal rate of the diclofenac is improved by 40%; compared with persulfate catalyzed ozone treatment of organic pollution, the removal rate of the diclofenac is improved by 30 percent; compared with the method for treating organic pollution by electrically enhancing persulfate, the removal rate of the diclofenac is improved by 58 percent. Therefore, the effect of the invention is obviously superior to that of other treatment modes, and is not simple superposition of the effects of the two treatment modes, and the generation efficiency of sulfate radicals and hydroxyl radicals is greatly enhanced due to the coupling effect among the electricity, the ozone and the persulfate. In conclusion, the water treatment method can generate active substances with high efficiency and greatly improve the treatment effect on the organic wastewater.
Example 2
Firstly, injecting organic wastewater to be treated into a reaction chamber containing a cathode/anode electrode system, injecting electrolyte to ensure that the conductivity of the solution reaches 70 mu s/cm, simultaneously opening a direct current stabilized power supply, and controlling the current density to be 200mA/cm2And adding ozone with the adding amount of 5mgL, then adding peroxymonosulfate to enable the concentration of the peroxymonosulfate to be 0.1mM, and treating for 15min to finish the treatment of the organic pollutants in the water, wherein the organic wastewater to be treated contains 1 mu mol/L of diclofenac.
In this embodiment, the electrolyte is sodium bicarbonate, the peroxydisulfate is added in a solution manner, the peroxydisulfate is sodium persulfate, the ozone is added in a saturated ozone solution manner, the electrode system is a three-dimensional electrode system with a filler of granular activated carbon, the anode of the electrode reactor is a graphite electrode, and the cathode of the electrode reactor is a graphite felt electrode. The calculated result shows that the removal rate of the diclofenac reaches 100% when the diclofenac is used for 12min in the embodiment.
Example 3
Firstly, injecting organic wastewater to be treated into a reaction chamber containing a cathode/anode electrode system, injecting electrolyte to ensure that the conductivity of the solution reaches 70 mu s/cm, simultaneously opening a direct current stabilized power supply, and controlling the current density to be 15mA/cm2And adding ozone, wherein the adding amount of the ozone is 500mg/mgTOC, then adding peroxymonosulfate to ensure that the concentration of the peroxymonosulfate is 0.1mM, and treating for 15min to finish the treatment of the organic pollutants in the water, wherein the organic wastewater to be treated contains 1 mu mol/L of diclofenac.
In the embodiment, the electrolyte is sodium chloride, the peroxymonosulfate is added in a solution manner, the peroxymonosulfate is magnesium peroxymonosulfate, ozone is added in an aeration manner, the electrode system is a three-dimensional electrode system with filler being granular activated carbon, the anode of the electrode reactor is a ceramic electrode, and the cathode of the electrode reactor is a graphite felt electrode. The calculation shows that the removal rate of the diclofenac reaches 100% in 3min in the embodiment.
Example 4
Firstly, organic wastewater to be treated is treatedInjecting into a reaction chamber containing cathode/anode electrode system, injecting electrolyte to make solution conductivity reach 70 μ s/cm, turning on DC voltage regulator at current density of 100mA/cm2Adding ozone with the adding amount of 5mg/mgTOC, then adding peroxymonosulfate and disulfate to make the concentration of the peroxymonosulfate and the disulfate 20mM, and treating for 15min to finish the treatment of organic pollutants in water, wherein the organic wastewater to be treated contains 1 mu mol/L diclofenac.
In this embodiment, the electrolyte is sodium carbonate, the peroxymonosulfate and the disulfate are added in a solution manner, the peroxymonosulfate is sodium peroxymonosulfate, the peroxydisulfate is sodium persulfate, ozone is added in an aeration manner, the electrode system is a three-dimensional electrode system with filler being granular activated carbon, the anode of the electrode reactor is a titanium platinum-plated electrode, and the cathode of the electrode reactor is a graphene material electrode. The removal rate of the diclofenac reaches 100% in 5min in the embodiment.
Example 5
Firstly, injecting organic wastewater to be treated into a reaction chamber containing a cathode/anode electrode system, injecting electrolyte to ensure that the conductivity of the solution reaches 300 mu s/cm, simultaneously opening a direct current stabilized power supply, and controlling the current density to be 15mA/cm2And adding ozone with the adding amount of 5mg/LTOC, then adding peroxymonosulfate to make the concentration of the peroxymonosulfate be 0.1mM, and treating for 15min to finish the treatment of organic pollutants in water, wherein the organic wastewater to be treated contains 1 mu mol/L diclofenac.
In this embodiment, the electrolyte is sodium sulfate, the peroxymonosulfate is added in a solution manner, the peroxymonosulfate is sodium peroxymonosulfate, ozone is added in an aeration manner, the electrode system is a three-dimensional electrode system with filler being granular activated carbon, the anode of the electrode reactor is a titanium platinized electrode, and the cathode of the electrode reactor is a carbon fiber electrode. The removal rate of diclofenac at 10min in this example was calculated to be 100%.
The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The method for degrading pollutants in water by synchronously exciting persulfate-ozone by the cathode and the anode is characterized by comprising the following steps of:
injecting organic wastewater to be treated into a reaction chamber containing a cathode/anode electrode system, adding electrolyte into the organic wastewater to enable the conductivity to reach 50-500 mus/cm, and simultaneously turning on a direct current stabilized power supply to control the current density to be 10-200 mA/cm2Then adding ozone and persulfate into the organic wastewater, and performing electric field treatment under the conditions that the adding amount of the ozone is 1-500 mg/L and the concentration of the persulfate is 0.1-20 mM, so as to finish the treatment of the organic pollutants in the organic wastewater; the electric field treatment time is 5-30 min.
2. The method for synchronously exciting persulfate-ozone to degrade pollutants in water by using the cathode and the anode as claimed in claim 1, wherein the electrode system comprises a two-dimensional electrode system and a three-dimensional electrode system; the filler of the three-dimensional electrode system is one or more of columnar activated carbon, granular activated carbon, steel slag particles, ceramsite and quartz sand.
3. The method for synchronously exciting persulfate-ozone to degrade pollutants in water as per claim 1, wherein the electrolyte is one or more of hydrochloride, phosphate, nitrate, carbonate, bicarbonate and sulfate.
4. The method for synchronously exciting persulfate-ozone to degrade pollutants in water by using the cathode and the anode as claimed in claim 1, wherein the persulfate is directly added in a solid form or added in a persulfate water solution form.
5. The method for simultaneous excitation of persulfate-ozone degradation of pollutants in water as in claim 1 or 4, wherein the persulfate is peroxymonosulfate and/or peroxydisulfate.
6. The method for simultaneous excitation of persulfate-ozone degradation of pollutants in water as in claim 5, wherein the peroxymonosulfate is one or more of potassium peroxymonosulfate, sodium peroxymonosulfate, calcium peroxymonosulfate, ammonia peroxymonosulfate, and magnesium peroxymonosulfate, and wherein the peroxydisulfate is one or more of potassium persulfate, sodium persulfate, calcium peroxysulfate, ammonia persulfate, and magnesium peroxydisulfate.
7. The method for synchronously exciting persulfate-ozone to degrade pollutants in water by using the cathode and the anode as claimed in claim 1, wherein the ozone is added in an aeration mode or in a saturated ozone solution mode.
8. The method for synchronously exciting persulfate-ozone to degrade pollutants in water by using the cathode and the anode as claimed in claim 1, wherein the anode is a carbon-based electrode, a metal composite loaded electrode or a ceramic electrode; the cathode is a graphene material electrode, a carbon nano material electrode, a carbon fiber electrode, an activated carbon material electrode, a net-shaped glassy carbon electrode or a graphite electrode.
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