CN113493242A - plasma-CaO for synchronously removing organic matters and phosphate radicals2Method - Google Patents
plasma-CaO for synchronously removing organic matters and phosphate radicals2Method Download PDFInfo
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- CN113493242A CN113493242A CN202110907395.3A CN202110907395A CN113493242A CN 113493242 A CN113493242 A CN 113493242A CN 202110907395 A CN202110907395 A CN 202110907395A CN 113493242 A CN113493242 A CN 113493242A
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- 229910019142 PO4 Inorganic materials 0.000 title claims abstract description 50
- 239000010452 phosphate Substances 0.000 title claims abstract description 50
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000011259 mixed solution Substances 0.000 claims abstract description 20
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- IQUPABOKLQSFBK-UHFFFAOYSA-N 2-nitrophenol Chemical compound OC1=CC=CC=C1[N+]([O-])=O IQUPABOKLQSFBK-UHFFFAOYSA-N 0.000 claims description 19
- 239000000523 sample Substances 0.000 claims description 15
- 230000002572 peristaltic effect Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 2
- -1 phosphate radical Chemical class 0.000 abstract description 34
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical group [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 abstract description 10
- 229910001424 calcium ion Inorganic materials 0.000 abstract description 6
- BTJIUGUIPKRLHP-UHFFFAOYSA-N 4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-N 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 4
- 239000005416 organic matter Substances 0.000 abstract description 4
- ZQBZAOZWBKABNC-UHFFFAOYSA-N [P].[Ca] Chemical compound [P].[Ca] ZQBZAOZWBKABNC-UHFFFAOYSA-N 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000013049 sediment Substances 0.000 abstract 1
- 238000003756 stirring Methods 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 9
- 239000011574 phosphorus Substances 0.000 description 9
- 229910052698 phosphorus Inorganic materials 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 239000013543 active substance Substances 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000001089 mineralizing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- 239000003993 organochlorine pesticide Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- SNGREZUHAYWORS-UHFFFAOYSA-N perfluorooctanoic acid Chemical compound OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F SNGREZUHAYWORS-UHFFFAOYSA-N 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
Abstract
The invention provides a plasma-CaO for synchronously removing organic matters and phosphate radicals2The method comprises the steps of manufacturing a high-voltage electrode by utilizing a stainless steel net, wrapping the high-voltage electrode on the outer surface of an outer medium, and enabling a prepared mixed solution of p-nitrophenol and phosphate radical to flow between an inner medium and the outer medium in a reactor. CaO (CaO)2Uniformly dispersing the water sample in the solution to be treated, and stirring the water sample to be treated and then flowing through the inner electrode and the outer electrode area at a certain flow rate. The method of the inventionIn medium of CaO2Released H2O2The ultraviolet light and the electrons in the plasma are excited to generate OH with stronger oxidability, so that the degradation of organic matters is accelerated; CaO (CaO)2Released Ca2+Can form stable calcium-phosphorus precipitation with phosphate radicals, and the plasma can promote the formation of calcium ions, thereby improving the removal efficiency of the phosphate radicals. The invention can decompose the organic matter into CO2And H2The purpose of O is to form stable sediment of phosphate radical and calcium ion without secondary pollution.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a method for synchronously removing organic matters and phosphate radicals in water.
Background
In recent years, the economic development of China is rapidly accelerated, and the discharge amount of industrial pollutants is increased day by day. Among them, a large amount of industrial wastewater generated in industrial industries such as coating, leather, pharmacy, etc. is complicated in composition and contains a large amount of phosphate radicals in addition to hardly degradable organic substances. The substances are difficult to degrade after entering the environment, can exist in the nature for a long time, are enriched in organisms through food chains, damage the balance of an ecological system, aggravate water eutrophication, and even bring serious threats to human health through teratogenesis, carcinogenesis, mutagenesis and other effects. Meanwhile, the toxicity of the wastewater is greatly increased by the interaction of the organic matters and the phosphorus.
For the treatment of organic matter and phosphorus in water, the traditional techniques mainly include biological methods, physical and chemical methods, membrane treatment and the like. However, the methods generally have the problems of complicated procedures, high operation cost, easy secondary pollution and the like, and synchronous removal of organic matters and phosphorus is not realized. The low-temperature Plasma Non-Thermal Plasma, NTP technology in the advanced oxidation technology in recent years has proved to be capable of degrading dye, aromatic and organochlorine pesticides in water with high efficiency due to the advantages of simple operation, high efficiency and no secondary pollutionAnd perfluorooctanoic acid, and mineralizing the same into CO2And H2And O. However, the problem of low energy utilization has been inhibiting the development of this technology. To solve this problem, related research has been carried out on NTP and H2O2Combined use of O produced by NTP3Electron, ultraviolet light catalysis H2O2More OH is generated, and the energy efficiency is greatly improved. However, H2O2Is easy to be decomposed and failed by heat and light, is easy to explode, is not beneficial to storage and transportation, and limits the large-scale application of the material. In addition, NTP coupling H2O2Although the energy efficiency and the organic matter removal efficiency can be improved, the phosphate radical removal ability is relatively weak.
Disclosure of Invention
1. The technical problem to be solved is as follows:
the traditional method for treating organic matters and phosphorus in water can cause secondary pollution and the like, and low-temperature plasma treatment has low energy utilization rate.
2. The technical scheme is as follows:
the invention provides a kind of NTP coupling CaO2A method for synchronously removing organic matters and phosphate radicals in water by constructing a catalyst with H2O2And calcium ion performance of plasma/CaO2The system realizes the purposes of improving the NTP energy efficiency and synchronously and efficiently removing phosphate radicals.
The specific technical scheme is as follows: plasma-CaO for synchronously removing organic matters and phosphate radicals2The method comprises the following steps: step S01: enabling a mixed solution of nitrophenol and phosphate radical to flow between an inner medium and an outer medium in a plasma reactor, wherein the plasma reactor comprises the outer medium and the inner medium, and a high-voltage electrode is arranged outside the outer medium; step S02: turning on the power supply to generate plasma between the external medium and the internal medium to remove CaO2Uniformly dispersing the mixture into a nitrophenol and phosphate mixed solution to be treated, and carrying out step S03: the mixed solution of nitrophenol and phosphate radical to be treated comes out from an outlet below the plasma reaction, passes through a peristaltic pump, reaches an inlet above the plasma reactor, enters the internal medium, and the process is circulatedAnd (4) a ring.
A stirrer is arranged between the outlet of the plasma reaction and the peristaltic pump, and the mixed solution of the nitrophenol and the phosphate radical to be treated is stirred by the stirrer and then is conveyed to the inlet of the plasma reactor 1 by the peristaltic pump after being discharged from the plasma outlet.
And a water distributor is arranged at the inlet of the plasma reactor, water distribution holes are formed in the water distributor, and the mixed solution of the nitrophenol to be treated and the phosphate radical enters the internal medium through the water distribution holes.
The plasma reactor is connected with a power supply, and the power supply is a pulse power supply.
The peak voltage of the pulse power supply is adjustable between 0 kW and 1 kW, the frequency is adjustable between 0 Hz and 200 Hz, the rise time is 50 us, and the pulse width is 100 us.
The plasma reactor is characterized by further comprising an oscilloscope, wherein a voltage probe is arranged between the oscilloscope and the power supply, and a current probe is arranged between the oscilloscope and the plasma reactor.
The outer medium high-voltage electrode is made of stainless steel mesh and wraps the outer medium.
Said CaO being2Has a particle diameter of 50-100 nm.
The initial concentration of the nitrophenol is 15-20mg/L, and the initial concentration of the phosphate radical is 10-20 mg/L.
The amount of the mixed solution of nitrophenol to be treated and phosphate to be treated was 300 mL.
3. Has the advantages that:
the invention is to construct plasma-CaO2The system realizes the synchronous removal of organic matters and phosphate radicals in water and CaO2In water, the water reacts with water to slowly release H2O2And toxic byproducts cannot be generated, the generated calcium ions can react with phosphate radicals to generate stable calcium-phosphorus precipitates, and meanwhile, NTP can promote the formation of the calcium ions, so that the removal efficiency of the phosphate radicals is improved. The system has the advantages of simple process, high efficiency, low operating cost and the like, not only improves the energy efficiency, but also can synchronously remove organic matters and phosphate radicals in water.
Ultraviolet light in NTP of the present inventionElectron and O3Etc. can promote CaO2Released H2O2More OH is generated to accelerate the degradation of organic matters, and the acidic condition generated in the process of NTP degrading the organic matters can promote CaO2More calcium ions are generated by decomposition, and calcium and phosphorus precipitation is accelerated.
The invention utilizes the coupling process to decompose the organic matters to generate CO2And H2O, so that phosphate radical and calcium ions form stable precipitate without secondary pollution, is expected to become a truly synchronous, efficient and green organic matter-phosphate radical composite wastewater remediation technology, and is used for synchronously and efficiently removing organic matters and phosphate radicals in wastewater and widening CaO2And the application range of the low-temperature plasma water treatment technology provides important reference value.
Drawings
FIG. 1 is a system diagram of the present invention.
FIG. 2 is a view showing the structure of a reactor.
FIG. 3 is a table showing the effect of plasma/CaO 2 on the simultaneous removal of phenol.
FIG. 4 is a table showing the effect of plasma/CaO 2 on the simultaneous removal of phenol and phosphate.
Description of reference numerals: 1. a plasma reactor; 2. a pulse power supply; 3. a peristaltic pump; 4. a stirrer; 5. a voltage probe; 6. a current probe; 7. an oscilloscope; 8. an outer medium; 9. an inner medium; 10. a high voltage electrode; 11. a ground electrode; 12. a water distributor.
Detailed Description
The present invention will be described in detail below with reference to the drawings and examples.
plasma-CaO for synchronously removing organic matters and phosphate radicals2The method comprises the following steps: step S01: the mixed solution of nitrophenol and phosphate radical flows between a medium 8 and an external medium 9 in a plasma reactor 1, as shown in fig. 2, the plasma reactor 1 comprises the external medium 8 and the internal medium 9, a high-voltage electrode 10 is arranged outside the external medium 8, and a water column is filled in the internal medium 9 to be used as a ground electrode 11.
Step S02: the power supply 2 is turned on to generate plasma between the external medium 8 and the internal medium 9 to remove CaO2Uniformly dispersed at the waiting positionIn the mixed solution of nitrophenol and phosphate radical, the active substance generated by plasma discharge can firstly oxidize organic substances, and simultaneously, CaO2Released H2O2The CaO is excited by ultraviolet light and electrons in the plasma to generate more oxidized OH, thereby accelerating the degradation of organic matters2Released Ca2+Can form calcium and phosphorus precipitates with phosphate radical, thereby achieving the purpose of synchronous phosphorus removal.
Step S03: the mixed solution of nitrophenol and phosphate radical to be treated comes out from an outlet below the plasma reaction, passes through the peristaltic pump 3, reaches an inlet above the plasma reactor 1, and enters between the inner medium 8 and the outer medium 9, and organic pollutants in water can be removed by active substances generated by plasma.
For better effect, as shown in fig. 1, a stirrer 4 is arranged between the outlet of the plasma reaction and the peristaltic pump 3, a water distributor 12 is arranged at the inlet of the plasma reactor 1, water distribution holes are arranged on the water distributor 12, and after the mixed solution of nitrophenol and phosphate to be treated comes out from the plasma outlet, the mixed solution is stirred and then sent into the water distributor by the peristaltic pump at a certain flow rate, and flows through the inner electrode and the outer electrode area through the water distribution holes.
In one embodiment, the plasma reactor further comprises an oscilloscope 7, wherein a voltage probe 5 is arranged between the oscilloscope 7 and a power supply, and a current probe 6 is arranged between the plasma reactor 1. The voltage probe and the current probe are used for detecting the voltage and the current applied to the reactor and outputting images and numerical values through an oscilloscope.
Examples
Water sample to be treated is injected into the water distributor 12 through the peristaltic pump 3 and further flows through the inner electrode and the outer electrode area through the water distribution holes on the water distributor 12. The voltage probe 5 and the current probe 6 are used for detecting the voltage and the current applied to the reactor, and outputting images and numerical values through the oscilloscope 7. A high-voltage electrode 10 is made of a stainless steel net and wrapped in the middle of the outer surface of an outer medium, 300 mL of prepared mixed solution of nitrophenol with initial concentration of 20mg/L and phosphate radical with initial concentration of 15 mg/L is injected into an inner medium 9 in a reactor to serve as a grounding electrode. Turning on the power supply, applying a discharge voltage adjusted to 20 kV, and setting the frequency to50 Hz, plasma is generated between the outer medium and the inner medium, water sample to be treated is stirred and then is sent into the water distributor 12 by the peristaltic pump 3 at the flow rate of 4L/min, and flows through the inner electrode and the outer electrode area through the water distribution holes, and organic pollutants in the water can be removed by active substances generated by the plasma. At the beginning of the experiment, CaO is added2Uniformly dispersed in the solution to be treated, and the addition amount of the dispersion is 0.06 g/L. The active species generated by the plasma discharge may first oxidize the organic matter, and at the same time, CaO2Released H2O2The ultraviolet light and the electrons in the plasma are excited to generate more oxidative OH, thereby accelerating the degradation of organic matters. CaO (CaO)2Released Ca2+Can form calcium and phosphorus precipitates with phosphate radical, thereby achieving the purpose of synchronous phosphorus removal.
The results are shown in FIG. 3 for CaO versus plasma alone2The addition of the catalyst improves the removal efficiency of p-nitrophenol when CaO2When the addition amount is 0.06 g/L, the discharge is carried out for 30 min, and the removal rate of the p-nitrophenol can be improved from 88.6 percent to 99.5 percent.
As can be seen from FIG. 4, the phosphate radical removing ability of the plasma alone is low, and CaO is generated when the treatment time is 30 min2The removal rate of phosphate radical is 72.8 percent, and the CaO is coupled with plasma2Can reach 90.5 percent to phosphate radical. And no matter the treatment of p-nitrophenol or phosphate radical, CaO is coupled by plasma2The removal efficiency is higher than that of the single plasma and the single CaO2The sum of the removal rates of (1) indicates the plasma and CaO2There is a synergistic effect between them. Furthermore, it can be seen that CaO alone2The removal rate of p-nitrophenol is low, and the removal rate of phosphate radical by single plasma is low. While the plasma couples the CaO2Not only can synchronously process PDP and phosphate radical, but also keeps higher removal efficiency, and embodies the unique advantages of the method.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. plasma-CaO for synchronously removing organic matters and phosphate radicals2The method comprises the following steps: step S01: enabling a mixed solution of nitrophenol and phosphate radical to flow between an inner medium (9) and an outer medium (8) in a plasma reactor, wherein the plasma reactor comprises the outer medium (8) and the inner medium (9), and a high-voltage electrode (10) is arranged outside the outer medium (8); step S02: the power supply (2) is turned on, plasma is generated between the external medium (8) and the internal medium (9), and CaO is generated2Uniformly dispersing the mixed solution into the mixed solution of the nitrophenol and the phosphate radical to be treated, enabling the mixed solution of the nitrophenol and the phosphate radical to be treated to come out from an outlet below the plasma reaction, passing through a peristaltic pump (3), reaching an inlet above the plasma reactor, entering into the inner medium (9), and circulating in this way.
2. The method of claim 1, wherein: a stirrer (4) is arranged between the outlet of the plasma reaction and the peristaltic pump (3), and the mixed solution of nitrophenol and phosphate radical to be treated is stirred by the stirrer (4) and then enters the inlet of the plasma reactor through the peristaltic pump (3) after coming out from the plasma outlet.
3. The method of claim 1 or 2, wherein: a water distributor (12) is arranged at the inlet of the plasma reactor, water distribution holes are formed in the water distributor (12), and the mixed solution of the nitrophenol to be treated and the phosphate radical enters the internal medium (9) through the water distribution holes.
4. The method of claim 1 or 2, wherein; the plasma reactor is connected with a power supply (2), and the power supply (2) is a pulse power supply.
5. The method of claim 4, wherein: the peak voltage of the pulse power supply is adjustable between 0 kW and 1 kW, the frequency is adjustable between 0 Hz and 200 Hz, the rise time is 50 us, and the pulse width is 100 us.
6. The method of claim 1 or 2, wherein: the plasma reactor is characterized by further comprising an oscilloscope (7), wherein a voltage probe (5) is arranged between the oscilloscope (7) and the power supply, and a current probe (6) is arranged between the plasma reactor and the voltage probe.
7. The method of claim 1 or 2, wherein: the outer medium (8) and the high-voltage electrode (10) are made of stainless steel meshes and wrap the outer medium (8).
8. The method of claim 1 or 2, wherein; said CaO being2Has a particle diameter of 50-100 nm.
9. The method of claim 1 or 2, wherein; the initial concentration of the nitrophenol is 15-20mg/L, and the initial concentration of the phosphate radical is 10-20 mg/L.
10. The method of claim 1 or 2, wherein; the amount of the mixed solution of nitrophenol to be treated and phosphate to be treated was 300 mL.
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| CN113493242B (en) | 2022-11-01 |
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