CN104671328A - Method for treating organic wastewater by using sodium bismuthate and plasma - Google Patents
Method for treating organic wastewater by using sodium bismuthate and plasma Download PDFInfo
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- CN104671328A CN104671328A CN201510051641.4A CN201510051641A CN104671328A CN 104671328 A CN104671328 A CN 104671328A CN 201510051641 A CN201510051641 A CN 201510051641A CN 104671328 A CN104671328 A CN 104671328A
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- waste water
- plasma
- sodium bismuthate
- discharge
- organic wastewater
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000002351 wastewater Substances 0.000 title claims abstract description 34
- PNYYBUOBTVHFDN-UHFFFAOYSA-N sodium bismuthate Chemical compound [Na+].[O-][Bi](=O)=O PNYYBUOBTVHFDN-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000004888 barrier function Effects 0.000 claims description 13
- 239000010815 organic waste Substances 0.000 claims description 11
- -1 after mixing Substances 0.000 claims description 2
- 239000003153 chemical reaction reagent Substances 0.000 claims description 2
- 238000010891 electric arc Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 230000033558 biomineral tissue development Effects 0.000 abstract description 2
- 230000001699 photocatalysis Effects 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- 238000006864 oxidative decomposition reaction Methods 0.000 abstract 1
- 238000007146 photocatalysis Methods 0.000 abstract 1
- 208000028659 discharge Diseases 0.000 description 32
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 26
- 239000007788 liquid Substances 0.000 description 10
- 239000000919 ceramic Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000003756 stirring Methods 0.000 description 6
- 238000005286 illumination Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 101150064138 MAP1 gene Proteins 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- IQFVPQOLBLOTPF-HKXUKFGYSA-L congo red Chemical compound [Na+].[Na+].C1=CC=CC2=C(N)C(/N=N/C3=CC=C(C=C3)C3=CC=C(C=C3)/N=N/C3=C(C4=CC=CC=C4C(=C3)S([O-])(=O)=O)N)=CC(S([O-])(=O)=O)=C21 IQFVPQOLBLOTPF-HKXUKFGYSA-L 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 239000011941 photocatalyst Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 101100400452 Caenorhabditis elegans map-2 gene Proteins 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000005524 ceramic coating Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005281 excited state Effects 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- UFBJCMHMOXMLKC-UHFFFAOYSA-N 2,4-dinitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O UFBJCMHMOXMLKC-UHFFFAOYSA-N 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000010919 dye waste Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a method for treating organic wastewater by using sodium bismuthate and a plasma. The method comprises the following steps: adding an agent of sodium bismuthate into the organic wastewater, mixing uniformly, adding the organic wastewater into a plasma discharge device, and treating the organic wastewater. The method provided by the invention integrates the discharge plasma technology with the photocatalysis of sodium bismuthate and can be used for treating wastewater rapidly and effectively. By inducing sodium bismuthate to generate active particles by using streamer which is generated in the process of stopping discharging by using an electric arc and a medium as a light source, the content of active components in a reaction system can be increased, and the oxidative decomposition and mineralization efficiency of organic pollutants can be improved.
Description
Technical field
The invention belongs to technical field of waste water processing, relate to a kind of process containing the method for organic pollutant wastewater, be specifically related to a kind of method of sodium bismuthate coordinated with plasma process organic waste water.
Background technology
In recent years, discharge plasma technique obtains research and apply widely in the treatment of waste water.Its principle produces high-energy electron in discharge process, carry the electrons of large energy to collide with the gas of electric discharge surrounding or liquid, these atoms and molecule is given by transmission ofenergy, make it ionize, group that electron avalanche becomes excited state, thus produce the particle, photon, free radical etc. that are in active state in a large number, as OH, H, O
2h, H
2o
2, O
3deng.On the one hand, high-energy electron can with contaminant molecule direct collision, make pollutent activate be in excited state, even dissociation.On the other hand, the oxidisability active particle produced in discharge process and pollutent generation chemical reaction, make it oxidative degradation.As the one in advanced oxidation water technology, plasma technique has plurality of advantages compared with other high-level oxidation technology, as water-soluble discharge in liquid can operate at normal temperatures and pressures, just can produce number of chemical oxidizing substance in aqueous without the need to adding catalyzer, this technology to the process economy of low-concentration organic and effectively.
Chinese scholars utilizes plasma technique to be studied different contaminant degradation, comprise 2,4 ?dinitrophenol, phenol and its derivatives and various microbiotic, agricultural chemicals and dyestuff etc., but being used alone plasma degradation waste water, to there is the treatment time long, only effective to light concentration organic pollutant, the shortcomings such as in discharge process, active substance can not be fully utilized, and capacity usage ratio is lower.How improving capacity usage ratio and then reducing energy consumption, effectively degrade to organic pollutants is the focus studied in recent years.
A large amount of UV-light, visible ray and infrared light streamer can be given off in the electric arc producing plasma body and dielectric barrier discharge process, photocatalyst can be added in reaction system, make full use of the energy in discharge process, improve processing efficiency.In various photocatalyst, TiO
2research is the most extensive, but its energy gap is about 3.2eV, can only absorb the UV-light that wavelength is less than 387nm.Perovskite type metal oxide sodium bismuthate (NaBiO
3) be a kind of novel effective photocatalyst, there is stronger photocatalytic activity.
Describe in Chinese patent CN 101734814 B (a kind of method of fast degrading organic dye waste water) to be adjusted in acid waste water in acid adding and add sodium bismuthate and stir and react, dosage 1g/L ?4g/L, the TOC clearance of different dyes waste water be 16% ?34%, the method does not need external energy, but sodium bismuthate dosage is higher, degree of depth mineralization ability is limited.Publication No. is describe the method adopting sodium bismuthate Quick Oxidation and sodium bismuthate sunlight catalytic two step coupling method dye wastewater treatment in the patent of CN 103626278 A, and TOC clearance can reach 52%, but the reaction times is longer.The relevant report combined with discharge plasma technique by sodium bismuthate is there is not yet in prior art.
Summary of the invention
The object of the invention is discharge plasma technique to combine with sodium bismuthate photochemical catalysis, a kind of method effectively processing organic waste water is fast provided.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A method for sodium bismuthate coordinated with plasma process organic waste water, adds sodium bismuthate reagent, after mixing, waste water is placed in plasma discharge apparatus and processes in organic waste water.
The preferred arc-over of discharge type of wherein said plasma discharge apparatus or dielectric barrier discharge.
The electric discharge output voltage of plasma discharge apparatus preferably 6 ?20kV, the discharge process time preferably 5 ?10min.
The power supply of plasma discharge apparatus preferably adopt AC ?DC ?the inversion of AC structure rectifying, power frequency 220V voltage of alternating current becomes amplitude 0 ~ 20kV, voltage of alternating current that frequency 1 ~ 100kHz is adjustable after rectification inverter circuit and high-tension transformer.
The plasma discharge apparatus adopting dielectric barrier discharge is post-plate structure (as shown in Figure 1), comprises dielectric barrier discharge high-voltage power supply, higfh-tension ceramics electrode, silica glass ware, ground-electrode stainless steel disk, base, support, media spacing governor lever and nut.
Waste water is placed in the silica glass ware of diameter 200mm, high 50mm.High voltage electrode is columnar ceramic electrode, surface is wrapped up by ceramic coating, diameter 25mm, and higfh-tension ceramics electrode is connected with AC power by hi-line, be placed in the top of reactive tank silica glass ware, regulate higfh-tension ceramics electrode tip to the distance of liquid level by media spacing governor lever.Higfh-tension ceramics electrode contacts with waste water liquid level.Low-field electrode is the ground-electrode stainless steel disk be close to bottom silica glass ware.
The plasma discharge apparatus of employing arc-over is the arc-over form (as shown in Figure 2) for the water surface, comprises high-voltage power supply, copper rod and silica glass ware; Waste water is placed in diameter 100mm, high 50mm silica glass ware, and column copper rod does high voltage electrode, and pending waste water does ground electrode, and fixed electorde end is apart from liquid level 8mm.
Described method, to process the volumeter of organic waste water, described sodium bismuthate (NaBiO
32H
2o) dosage preferably 0.2 ?0.8g/L.
Described organic waste water pH value preferably 6.2 ?10.
The described treatment time preferably 5 ?10min.
Described treatment temp preferably 15 ?28 DEG C, processing pressure is normal pressure.
Beneficial effect of the present invention is as follows:
1) in the present invention, sodium bismuthate is placed in plasma body water processing reactor, utilizes the streamer given off in discharge process, light-catalyzed reaction occurs, generates a large amount of living radical, degraded organic pollutants generates simple organic, carbonic acid gas and water.Worked in coordination with the dual function be coupled by photochemical catalytic oxidation and advanced oxidation, significantly improve organic removal efficiency in waste water.
2) in the present invention, used sodium bismuthate is Yellow amorphous powder, directly can buy, can repeatedly use continuously.
3) a whole set of system operates under normal temperature, normal pressure, simple to operate, and the reaction times is short.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of dielectric barrier discharge plasma discharge treatment device, wherein: 1-dielectric barrier discharge high-voltage power supply, 2-higfh-tension ceramics electrode, 3-silica glass ware, 4-ground-electrode stainless steel disk, 5-base, 6-support, 7-media spacing governor lever, 8-nut
The surface of higfh-tension ceramics electrode is wrapped up by ceramic coating, and higfh-tension ceramics electrode is connected with AC power by hi-line, is placed in the top of reactive tank silica glass ware, regulates higfh-tension ceramics electrode tip to the distance of liquid level by media spacing governor lever.
Fig. 2 is arc discharge plasma treatment unit schematic diagram, wherein: 1 ?high-voltage power supply, 2 ?copper rod, 3 ?silica glass ware; Fixed electorde end is apart from liquid level 8mm.
Embodiment
Embodiment 1:
The aniline simulated wastewater of preparation 100mg/L, pH value is 6.5.Take 0.2g NaBiO
32H
2o adds in 250mL solution, stirs, after dark place leaves standstill 30min in dielectric barrier discharge device shown in load map 1.Regulate AC power output voltage to be 20kV, discharge frequency 17Hz, high voltage electrode contacts with liquid level, reacts 10min under normal temperature and pressure.It is 45.12% that result shows that the aniline clearance in waste water can reach 62.81%, TOC clearance.Under same experimental conditions, the clearance being used alone dielectric barrier discharge treatment of simulated aniline waste water is 42.16%, TOC clearance is 29%.Add separately 0.2g NaBiO
32H
2the clearance of illumination 10min aniline is 5.11%, TOC clearance to O is under fluorescent light 0.9%.
Embodiment 2:
The aniline simulated wastewater of preparation 100mg/L, pH value is 6.5.Get 250mL simulated wastewater, regulate pH to be 10 with the NaOH of 0.1mol/L, take 0.2g NaBiO
32H
2o adds in solution, stirs, after dark place leaves standstill 30min in dielectric barrier discharge device shown in load map 1.Regulate AC power output voltage to be 20kV, discharge frequency 17Hz, high voltage electrode contacts with liquid level, reacts 10min under normal temperature and pressure.Result shows that Aniline clearance be 44.39%, TOC clearance is 28.64%.Under same experimental conditions, the clearance being used alone dielectric barrier discharge treatment of simulated aniline waste water is 29.76%, TOC clearance is 12.34%.Add separately 0.2g NaBiO
32H
2the clearance of illumination 10min aniline is 3.06%, TOC clearance to O is under fluorescent light 0.07%.
Embodiment 3:
The aniline simulated wastewater of preparation 25mg/L, pH value is 6.5.Take 0.05g NaBiO
32H
2o adds in 250mL solution, stirs, after dark place leaves standstill 30min in dielectric barrier discharge device shown in load map 1.Regulate AC power output voltage to be 18kV, discharge frequency 17Hz, high voltage electrode contacts with liquid level, reacts 10min under normal temperature and pressure.It is 54.87% that result shows that the aniline clearance in aniline waste water can reach 91.24%, TOC clearance.Under same experimental conditions, the clearance being used alone dielectric barrier discharge treatment of simulated aniline waste water is 80.22%, TOC clearance is 6.29%.Add separately 0.05g NaBiO32H
2the clearance of illumination 10min aniline is 10.35%, TOC clearance to O is under fluorescent light 2.17%.
Embodiment 4:
The Congo red simulated wastewater of preparation 50mg/L, pH value is 6.3.Take 0.1g NaBiO
32H
2o adds in 250mL solution, stirs, after dark place leaves standstill 30min in arc discharge device shown in load map 2.Regulate AC power output voltage to be 8kV, under normal temperature and pressure, react 8min.Result shows that the TOC clearance of waste water can reach 95.23%.Under same experimental conditions, the clearance being used alone the Congo red waste water TOC of arc-over treatment of simulated is 69.0%.Add separately 0.1g NaBiO32H
2o under fluorescent light illumination 8min TOC clearance is 1.71%.
Embodiment 5:
The tropeolin-D simulated wastewater of preparation 50mg/L, takes 0.025g NaBiO
32H
2o adds in 50mL solution, stirs, after dark place leaves standstill 30min in arc discharge device shown in load map 2.Regulate AC power output voltage to be 6kV, under normal temperature and pressure, react 5min.Result shows that the TOC clearance of waste water can reach 92.03%.Under same experimental conditions, the TOC clearance being used alone the Congo red waste water of arc-over treatment of simulated is 73.48%.Add separately 0.025g NaBiO32H
2o under fluorescent light illumination 5min TOC clearance is 0.
Above-described embodiment is five examples of implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any does not deviate from change, modification that invention of the present invention essence makes or substitutes, and all should be the displacement of equivalence, is included within protection scope of the present invention.
Claims (8)
1. a method for sodium bismuthate coordinated with plasma process organic waste water, is characterized in that in organic waste water, add sodium bismuthate reagent, after mixing, waste water is placed in plasma discharge apparatus and processes.
2. method according to claim 1, is characterized in that the discharge type of described plasma discharge apparatus is arc-over or dielectric barrier discharge.
3. method according to claim 1, it is characterized in that plasma discharge apparatus electric discharge output voltage 6 ?20kV, discharge process 5 ?10min.
4. the method according to claim 1 or 3, it is characterized in that plasma discharge apparatus power acquisition AC ?DC ?the inversion of AC structure rectifying, power frequency 220V voltage of alternating current becomes amplitude 0 ~ 20kV, voltage of alternating current that frequency 1 ~ 100kHz is adjustable after rectification inverter circuit and high-tension transformer.
5. method according to claim 1, is characterized in that the volumeter processing organic waste water, described sodium bismuthate dosage be 0.2 ?0.8g/L.
6. method according to claim 1, it is characterized in that described organic waste water pH value be 6.2 ?10.
7. method according to claim 1, it is characterized in that the described treatment time be 5 ?10min.
8. method according to claim 1, be characterised in that described treatment temp be 15 ?28 DEG C, processing pressure is normal pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510051641.4A CN104671328A (en) | 2015-01-30 | 2015-01-30 | Method for treating organic wastewater by using sodium bismuthate and plasma |
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|---|---|---|---|
| CN201510051641.4A CN104671328A (en) | 2015-01-30 | 2015-01-30 | Method for treating organic wastewater by using sodium bismuthate and plasma |
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|---|---|
| CN104671328A true CN104671328A (en) | 2015-06-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060409A (en) * | 2015-09-11 | 2015-11-18 | 南京工业大学 | Method for treating printing and dyeing wastewater |
| EP3321233A1 (en) * | 2016-11-14 | 2018-05-16 | Iurii Pavlovich Skakunov | Method and device for in-stream aqueous medium treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20150603 |