CN113429058A - Method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma - Google Patents
Method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma Download PDFInfo
- Publication number
- CN113429058A CN113429058A CN202110768467.0A CN202110768467A CN113429058A CN 113429058 A CN113429058 A CN 113429058A CN 202110768467 A CN202110768467 A CN 202110768467A CN 113429058 A CN113429058 A CN 113429058A
- Authority
- CN
- China
- Prior art keywords
- dielectric barrier
- potassium ferrate
- barrier discharge
- discharge plasma
- wastewater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- UMPKMCDVBZFQOK-UHFFFAOYSA-N potassium;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[K+].[Fe+3] UMPKMCDVBZFQOK-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000002351 wastewater Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000004888 barrier function Effects 0.000 title claims abstract description 34
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 25
- 229910052742 iron Inorganic materials 0.000 claims abstract description 23
- 230000003647 oxidation Effects 0.000 claims abstract description 16
- 239000000126 substance Substances 0.000 claims abstract description 12
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000001590 oxidative effect Effects 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 10
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 10
- 231100000719 pollutant Toxicity 0.000 claims abstract description 10
- -1 iron ions Chemical class 0.000 claims abstract description 7
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims description 55
- 208000028659 discharge Diseases 0.000 claims description 44
- 230000002195 synergetic effect Effects 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000013543 active substance Substances 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 239000000975 dye Substances 0.000 description 50
- 239000000243 solution Substances 0.000 description 38
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 25
- 239000000706 filtrate Substances 0.000 description 24
- 238000003756 stirring Methods 0.000 description 21
- 238000000967 suction filtration Methods 0.000 description 17
- 239000004744 fabric Substances 0.000 description 16
- 239000013078 crystal Substances 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 239000012065 filter cake Substances 0.000 description 12
- 239000007787 solid Substances 0.000 description 12
- 238000005303 weighing Methods 0.000 description 12
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 10
- 229940012189 methyl orange Drugs 0.000 description 10
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 9
- 239000011521 glass Substances 0.000 description 9
- 239000012535 impurity Substances 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 8
- 239000005457 ice water Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 8
- SATVIFGJTRRDQU-UHFFFAOYSA-N potassium hypochlorite Chemical class [K+].Cl[O-] SATVIFGJTRRDQU-UHFFFAOYSA-N 0.000 description 8
- 239000012043 crude product Substances 0.000 description 7
- 238000010790 dilution Methods 0.000 description 7
- 239000012895 dilution Substances 0.000 description 7
- 230000035484 reaction time Effects 0.000 description 7
- 238000005189 flocculation Methods 0.000 description 6
- 230000016615 flocculation Effects 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000004065 wastewater treatment Methods 0.000 description 5
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 4
- 229910000608 Fe(NO3)3.9H2O Inorganic materials 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 229960000907 methylthioninium chloride Drugs 0.000 description 4
- 239000005416 organic matter Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 238000002306 biochemical method Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000002848 electrochemical method Methods 0.000 description 2
- 239000002638 heterogeneous catalyst Substances 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000020477 pH reduction Effects 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000009297 electrocoagulation Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/0018—Mixed oxides or hydroxides
- C01G49/0027—Mixed oxides or hydroxides containing one alkali metal
-
- 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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention aims to overcome the defects of the existing dielectric barrier discharge plasma water treatment method, and provides a method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma. Firstly, the strong oxidizing property of hexavalent iron ions is fully utilized to carry out the pre-oxidation of the organic dye, and H generated at the same time2O2、O3The oxidizing particles such as ∙ OH, etc. significantly increase the number of active particles in the system. Then, a Fenton-like system is formed by utilizing low-valence iron ions and dielectric barrier discharge plasma, so that H in the dielectric barrier discharge plasma is effectively enhanced2O2、O3Benefits of isoactive substancesThe method is used for homogenizing the filamentous discharge channel by effectively improving the conductivity of the solution, thereby improving the removal effect of the organic dye. Finally, ferric iron floc is formed to further remove pollutants, and the method has the characteristics of simple and stable process, easily obtained and cheap materials, no emission of harmful substances and the like.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma.
Background
In recent years, with the rapid development of the dye industry and the continuous use of various dyes, the number and kinds of dyes entering the environment have increased day by day. It is reported that 2% of products are lost in the production of each ton of dye, about 10% of products are lost with waste water in the printing and dyeing process, and the waste water has the characteristics of high biochemical oxygen demand, high chromaticity, high pH value and the like.
The existing dye wastewater treatment technologies mainly comprise physical methods (adsorption method and membrane separation), electrochemical methods (internal electrolysis method, electrocoagulation electro-flotation and electrocatalytic oxidation), biochemical methods (aerobic treatment method and anaerobic treatment method) and chemical methods (chemical coagulation method, wet air oxidation method, photocatalytic oxidation method and chemical oxidation method). Among them, the physical method has disadvantages that the adsorbent is expensive and not easily regenerated. Electrochemical methods have the disadvantage of being energy consuming and of consuming too much material. The biochemical method has the defects of large water quality fluctuation of dye wastewater, multiple types, high toxicity and difficult adaptation to microorganisms with strict requirements on temperature and pH conditions. The essence of the chemical method is that the chromophoric groups of the dye are destroyed and decolorized by ozone, chlorine, and their oxide, thereby converting the toxic substances in the dye wastewater into non-toxic substances, and the disadvantage is that the chemical sludge needs to be further treated. The chemical method is a very competitive dye wastewater treatment method considering the technical and economic properties.
In recent years, dielectric barrier discharge plasma (DBD) has been widely used and studied as a new technology combining chemical oxidation, photocatalytic oxidation and other treatment methods in dye wastewater treatment in addition to the existing chemical methods. The dielectric barrier discharge plasma is characterized in that the plasma discharge effect is realized under normal pressure, ultraviolet high-energy radiation and a large amount of ∙ OH and H are generated in the discharge process2O2、O3And active substances are added to break the chain of the dye organic matter. Compared with the traditional method, the method has the advantages of good decoloring effect, high efficiency, high reaction speed and wide application range, and is suitable for various organic dyes difficult to degrade. But H is affected by liquid phase resistance and the like2O2、O3The active substances are greatly consumed before the active substances are effectively contacted with pollutants, so that the pollutant degradation efficiency and the energy utilization efficiency are reduced. If can strengthen the pair H2O2、O3And the utilization of active substances improves the degradation efficiency of the organic dye in water and saves the cost of wastewater treatment.
The invention relates to a method for treating dye wastewater efficiency by using existing dielectric barrier discharge plasma, for example, an invention patent with publication number CN 102603029a "device for treating dye wastewater by using dielectric barrier discharge technology and method thereof" issued on month 07, 25 and 2012, which discloses a method comprising the following steps: a uniform liquid film can be formed on the surface of the negative plate, dielectric barrier discharge is formed between the negative plate and the high-voltage electrode, unused ozone and other active substances generated by the reaction are injected into the container through the micropore aeration device, and Mn is added into the reaction container2+、Cu2+、Zn2+、Co2+Plasma metal ion or MnO2+、TiO2Heterogeneous catalysts such as activated carbon, etc. to enhance the treatment effect. The main disadvantages of this process are: firstly, the sleeve structure of the device is complex and is not beneficial to large-scale use; secondly, aeration is needed in the reaction process, so that the energy consumption is high, and the water treatment cost is still high; in order to enhance the treatment effect, metal ions or heterogeneous catalysts added into the reaction vessel cannot be effectively removed, the adding amount is high, and the risk of secondary pollution is increased; fourthly, the deep mineralization capability of the method is limited and needs to be further improved.
Disclosure of Invention
The invention aims to overcome the defects of the existing dielectric barrier discharge plasma water treatment method, and provides a method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma. Firstly, the strong oxidizing property of hexavalent iron ions is fully utilized to carry out the pre-oxidation of the organic dye. And then, a Fenton-like system is formed by using low-valence iron ions and dielectric barrier discharge plasma, so that the utilization of active substances is effectively enhanced, and the removal effect of the organic dye is improved. Finally, ferric iron floc is formed to further remove pollutants, and the method has the characteristics of simple and stable process, easily obtained and cheap materials, no emission of harmful substances and the like.
The mechanism of the invention is as follows: potassium ferrate has strong oxidizing property, the standard electrode potential under acidic condition is 2.20V, under alkaline condition is 0.72V, organic matter in the waste water is used as electron donor, Fe (VI) is used as electron acceptor, Fe (V), Fe (IV) and Fe (III) are sequentially generated through single electron transfer step, and active particles such as ∙ OH, H2O2 and O3 are generated at the same time, so that the number of oxidizing particles in the system is obviously increased, thereby realizing the pre-oxidation of pollutants, and the reaction can be completed in a short time. High-energy electrons generated in the DBD discharging process can directly collide with pollutant molecules, so that the pollutants are quickly activated and even degraded. Thirdly, after potassium ferrate added into the DBD device is rapidly changed into low-valence iron, the whole system takes Fe (III) as a catalyst to form a DBD/Fenton-like synergistic reaction system, active particles such as H2O2, O3 and the like are fully utilized, the yield of ∙ OH is greatly improved, and the extremely active ∙ OH reacts with dye organic matters in wastewater to finally enable the dye to be effectively degraded until mineralized. Meanwhile, the pH reduction of the reaction solution caused by ionized air in the DBD discharging process also provides necessary conditions for a new DBD/Fenton-like system, and additional acid is not needed to adjust the acid-base conditions of the solution, so that the cost is further reduced. In addition, the potassium ferrate added into the DBD can also effectively increase the conductivity of the solution and homogenize a filamentous discharge channel, so that the discharge in the reaction process is more stable and uniform. Fourthly, the added potassium ferrate can also be finally changed into trivalent iron flocs, the chemical flocculation reaction further enhances the organic matter removal efficiency and simultaneously effectively solves the problem of metal iron recovery, and the flocs can be finally used as building materials.
The purpose of the invention is realized as follows: a method for treating dye wastewater by potassium ferrate cooperating with dielectric barrier discharge plasma comprises the steps of adding potassium ferrate into a DBD (double-walled carbon diode) for pre-oxidation, forming a DBD/Fenton-like cooperative reaction system after the potassium ferrate is rapidly changed into low-valence iron to effectively promote H2O2, O3 and the like to be converted into hydroxyl radicals, effectively improving the degradation effect of dye in the wastewater by the low-selectivity high-oxidation activity of the hydroxyl radicals, and finally further removing pollutants by utilizing generated iron floc and realizing metal iron recovery. The method comprises the following specific steps:
(1) preparation of potassium ferrate
Preparing a proper amount of potassium hydroxide solution, and cooling to room temperature for later use; weighing a certain amount of calcium hypochlorite, putting the calcium hypochlorite into a small beaker, adding a certain volume of 13mol/L potassium hydroxide solution, slightly stirring the mixture by using a glass rod, performing suction filtration on the reacted solution by using filter cloth with the pore diameter of 800 meshes, and filtering impurities such as calcium hydroxide and the like to obtain yellow-green filtrate; adding 20mL of cooled saturated potassium hydroxide solution into the yellow-green filtrate in batches, controlling the reaction temperature to be lower than 70 ℃, fully stirring, and then carrying out suction filtration to remove impurities to obtain alkaline saturated potassium hypochlorite solution; weighing a certain mass of Fe (NO3) 3.9H 2O, grinding into powder, slowly adding the powder into an alkaline saturated potassium hypochlorite solution in batches under vigorous stirring, controlling the reaction temperature by using an ice-water bath at 10-40 ℃, and fully stirring. The oxidation reaction is fast, and the color of the solution is quickly changed into purple black; after the mixture fully reacts for a certain time, adding a cooled saturated potassium hydroxide solution into the purple black solution, continuously stirring for 5 minutes, carrying out ice precipitation and standing, quickly carrying out suction filtration by using filter cloth, recovering the filtrate to be used as a washing liquid, and obtaining a filter cake which is a crude potassium ferrate product. Soaking and washing the obtained potassium ferrate crude product for 3 times by using 2-7 mol/L potassium hydroxide solution, wherein each time is 5mL, dissolving the potassium ferrate, then performing suction filtration by using filter cloth, recovering a filter cake as a building material, and keeping a filtrate; pouring the filtrate into a long-neck flask, adding 3-13 mol/L potassium hydroxide solution with a certain volume into the filtrate under the condition of ice-water bath, recrystallizing at the temperature of-5-20 ℃, and quickly performing suction filtration by using filter cloth to obtain a filter cake, namely a potassium ferrate solid; washing the potassium ferrate solid with n-hexane (4 times × 25 mL), n-pentane (4 times × 25 mL), methanol (4 times × 10 mL) and ether (2 times × 10 mL) respectively; and finally, drying the obtained product potassium ferrate crystal (purple black) for 2-3 hours at the temperature of 60-70 ℃, weighing and storing in a dryer for later use.
(2) Pre-oxidation of potassium ferrate
Preparing the potassium ferrate solid prepared in the step (1) into solutions with the concentration of 0.01-0.10 mol/L respectively, and adjusting the pH value to 9-10. Preparing simulated dye wastewater with the concentration of 50mg/L, placing the simulated wastewater into a quartz glass vessel of a dielectric barrier plasma discharge device according to 70-80% of the volume of the glass vessel, and performing reaction according to the following steps of: the volume ratio of the simulated wastewater is 1: 70-1: 80, transferring the potassium ferrate solution, adding the potassium ferrate solution into the dye wastewater, and pre-oxidizing for 10-30 s to lighten the color of the dye wastewater.
(3) Form a DBD-Fenton-like synergistic reaction system to treat dye wastewater
The plasma device adopting the flat plate type surface dielectric barrier discharge comprises a high-voltage alternating experiment power supply, a contact voltage regulator, an oscilloscope, a stainless steel columnar high-voltage electrode, a stainless steel disc grounding electrode, an adaptive glass vessel, a medium spacing adjusting rod, a matched base, a matched support and the like.
And (3) after the step (2) is finished, adjusting, fixing the distance between the quartz glass plate and the liquid level to be 5mm, starting a power supply, and preferably selecting the discharge output voltage of the DBD/Fenton-like synergistic reaction system for treating the dye wastewater to be 16.8-28.0 kV, and the discharge treatment time to be 0-20 min. With the increase of the reaction time, the color of the simulated dye wastewater gradually becomes lighter until the wastewater is completely decolorized, and yellow brown ferric iron flocs are gradually formed.
(4) Flocculation of iron flocs
And (3) after the step (3) is finished, tawny flocs continuously appear in the reaction system, standing for 10 minutes, collecting supernatant, putting the supernatant into a centrifugal machine, separating and reacting for 1-3 minutes under the condition that the rotation speed of the centrifugal machine is 4000 rpm-min < -1 >, after the reaction is finished, obtaining the supernatant which is final effluent, and detecting that the pH of the effluent is = 6.0-9.0, the chroma is less than or equal to 25 dilution times, the suspended matter is less than or equal to 30mg/L, the COD is less than or equal to 50mg/L, and the iron is less than or equal to 0.3mg/L, so that the standard discharge is realized.
After the technical scheme is adopted, the invention mainly has the following effects:
1. the potassium ferrate prepared by the method has purple black crystals, and compared with the traditional preparation method, the method has the advantages that the calcium hypochlorite is used as a raw material, the chlorine gas does not need to be prepared on site, and the danger and the difficulty of preparing the potassium ferrate are reduced. The method of adding cooled saturated potassium hydroxide solution in batches, fully stirring and filtering to remove impurities is adopted, the reaction temperature is strictly controlled, and the concentration of hypochlorite is improved, so that the yield of potassium ferrate is improved to 50.16%, the purity is 96%, and the application range of the product is increased.
2. The invention makes full use of the strong oxidizing property of the potassium ferrate and the valence variation of iron ions. The standard electrode potentials of potassium ferrate under acid and alkaline conditions are respectively 2.20V and 0.72V, the potassium ferrate serving as a strong oxidant can directly and rapidly generate redox chemical reaction with organic dye molecules, and active particles such as ∙ OH, H2O2 and O3 are generated at the same time, so that the number of oxidizing particles in a system is remarkably increased, and the pre-oxidation of pollutants is rapidly realized.
3. After potassium ferrate added into a DBD device is rapidly changed into low-valent iron, the whole system takes Fe (III) as a catalyst to form a DBD/Fenton-like synergistic reaction system, active particles such as H2O2, O3 and the like generated in the DBD discharge process and the Fe (VI) oxidation process are fully utilized, the yield of ∙ OH is greatly improved, the extremely active OH reacts with dye organic matters in wastewater to destroy chromophoric groups of the dye to effectively degrade the dye, and the removal efficiency of the dye organic matters in the wastewater is obviously improved.
4. The method fully utilizes the pH reduction of the reaction liquid caused by ionized air in the DBD discharge process, provides necessary conditions for a new DBD/Fenton-like system, does not need to add H2O2 additionally or add acid additionally to adjust the acid-base conditions of the solution, further reduces the cost, and has better industrial popularization value. In addition, the potassium ferrate added into the DBD can also effectively increase the conductivity of the solution and homogenize a filamentous discharge channel, so that the discharge in the reaction process is more stable and uniform.
5. The component of the invention utilizes the flocculation property of ferric ions to form ferric floc finally through potassium ferrate reaction, thereby further enhancing the organic matter removal efficiency and effectively solving the problem of metal iron recovery.
6. The whole system of the invention operates at normal temperature and normal pressure, and the reaction equipment is simple, simple and convenient to operate and easy to control.
Fourth, detailed description of the invention
The present invention will be further described with reference to the following specific embodiments.
Example 1
A method for treating dye wastewater by potassium ferrate cooperating with dielectric barrier discharge plasma comprises the following specific steps:
(1) preparation of potassium ferrate
Preparing a proper amount of potassium hydroxide solution, and cooling to room temperature for later use; weighing a certain amount of calcium hypochlorite, putting the calcium hypochlorite into a small beaker, adding a certain volume of 13mol/L potassium hydroxide solution, slightly stirring the mixture by using a glass rod, performing suction filtration on the reacted solution by using filter cloth with the pore diameter of 800 meshes, and filtering impurities such as calcium hydroxide and the like to obtain yellow-green filtrate; adding 20mL of cooled saturated potassium hydroxide solution into the yellow-green filtrate in batches, controlling the reaction temperature, fully stirring, and performing suction filtration to remove impurities to obtain an alkaline saturated potassium hypochlorite solution; weighing a certain mass of Fe (NO3) 3.9H 2O, grinding into powder, slowly adding into an alkaline saturated potassium hypochlorite solution in batches under vigorous stirring, wherein the reaction is an exothermic reaction, controlling the reaction temperature to be 20 ℃ by using an ice-water bath, and fully stirring. The oxidation reaction is fast, and the color of the solution is quickly changed into purple black; after the mixture fully reacts for a certain time, adding a cooled saturated potassium hydroxide solution into the purple black solution, continuously stirring for 5 minutes, carrying out ice precipitation and standing, quickly carrying out suction filtration by using filter cloth, and discarding the filtrate to obtain a filter cake, namely a potassium ferrate crude product; the obtained potassium ferrate crude product is soaked and washed for 3 times by 3mol/L potassium hydroxide solution, 5mL of potassium ferrate is used for each time to dissolve the potassium ferrate, then the potassium ferrate is filtered by filter cloth, a filter cake is discarded, and a filtrate is reserved; pouring the filtrate into a long-neck flask, adding a certain volume of 13mol/L potassium hydroxide solution into the filtrate under the condition of ice-water bath, recrystallizing at the recrystallization temperature of 0 ℃, and quickly performing suction filtration by using filter cloth to obtain a filter cake, namely a potassium ferrate solid; washing the potassium ferrate solid with n-hexane (4 times × 25 mL), n-pentane (4 times × 25 mL), methanol (4 times × 10 mL) and ether (2 times × 10 mL) respectively; drying at 65 deg.C for 2 hr to obtain final product potassium ferrate crystal (purple black) with purity of 96%, weighing, and placing into a dryer for use.
(2) Pre-oxidation of potassium ferrate
And (3) after the step (1) is finished, preparing the prepared potassium ferrate solid into a solution with the concentration of 0.02mol/L, and adjusting the pH value to 9-10. Preparing methylene blue simulated dye wastewater with the concentration of 50mg/L, placing the methylene blue simulated wastewater into a quartz glass vessel of a dielectric barrier plasma discharge device according to 75% of the volume of the glass vessel, and performing reaction according to the weight ratio of potassium ferrate: the volume ratio of the simulated wastewater is 1: 80 transferring the potassium ferrate solution to be added into the dye wastewater for pre-oxidation for 20s, so that the color of the dye wastewater is lightened.
(3) Form a DBD/Fenton-like synergistic reaction system to treat dye wastewater
And (3) after the step (2) is finished, adjusting the distance between the fixed quartz glass plate and the liquid level to be 5mm, starting a power supply, and preferably selecting 28.0 kV for the discharge output voltage of the DBD/Fenton-like synergistic reaction system for treating the dye wastewater and 20min for the discharge treatment time. With the increase of the reaction time, the color of the simulated dye wastewater gradually becomes lighter until the wastewater is completely decolorized, and yellow brown ferric iron flocs are gradually formed.
(4) Flocculation of iron flocs
And (3) after the step (3) is finished, enabling tawny flocs to continuously appear in the reaction system, standing for 10 minutes, collecting supernate, putting the supernate into a centrifugal machine, and carrying out separation reaction for 2 minutes under the condition that the rotating speed of the centrifugal machine is 4000 rpm min < -1 >, wherein the supernate is the final effluent after the reaction is finished. The change condition of the methylene blue concentration along with the reaction time is measured, and the experimental result shows that the pH of the final effluent after 20 minutes is = 6.0-9.0, the chroma is less than or equal to 20 dilution times, the suspended matter is less than or equal to 25mg/L, the COD is less than or equal to 41mg/L, and the iron is less than or equal to 0.25 mg/L. Under the same experimental conditions, the final effluent pH of the simulated methylene blue wastewater is treated by using the dielectric barrier discharge plasma alone = 6.0-9.0, the chroma is less than or equal to 55 dilution times, the suspended matter is less than or equal to 47mg/L, and the COD is less than or equal to 102 mg/L.
Example 2
A method for treating dye wastewater by using potassium ferrate in cooperation with dielectric barrier discharge plasma comprises the following specific steps:
(1) preparation of potassium ferrate
Preparing a proper amount of potassium hydroxide solution, and cooling to room temperature for later use; weighing a certain amount of calcium hypochlorite, putting the calcium hypochlorite into a small beaker, adding a certain volume of 13mol/L potassium hydroxide solution, slightly stirring the mixture by using a glass rod, performing suction filtration on the reacted solution by using filter cloth with the pore diameter of 800 meshes, and filtering impurities such as calcium hydroxide and the like to obtain yellow-green filtrate; adding 20mL of cooled saturated potassium hydroxide solution into the yellow-green filtrate in batches, controlling the reaction temperature, fully stirring, and performing suction filtration to remove impurities to obtain an alkaline saturated potassium hypochlorite solution; weighing a certain mass of Fe (NO3) 3.9H 2O, grinding into powder, slowly adding into an alkaline saturated potassium hypochlorite solution in batches under vigorous stirring, wherein the reaction is an exothermic reaction, controlling the reaction temperature to be 20 ℃ by using an ice-water bath, and fully stirring. The oxidation reaction is fast, and the color of the solution is quickly changed into purple black; after the mixture fully reacts for a certain time, adding a cooled saturated potassium hydroxide solution into the purple black solution, continuously stirring for 5 minutes, carrying out ice precipitation and standing, quickly carrying out suction filtration by using filter cloth, and discarding the filtrate to obtain a filter cake, namely a potassium ferrate crude product; the obtained potassium ferrate crude product is soaked and washed for 3 times by 3mol/L potassium hydroxide solution, 5mL of potassium ferrate is used for each time to dissolve the potassium ferrate, then the potassium ferrate is filtered by filter cloth, a filter cake is discarded, and a filtrate is reserved; pouring the filtrate into a long-neck flask, adding a certain volume of 13mol/L potassium hydroxide solution into the filtrate under the condition of ice-water bath, recrystallizing at the recrystallization temperature of 0 ℃, and quickly performing suction filtration by using filter cloth to obtain a filter cake, namely a potassium ferrate solid; washing the potassium ferrate solid with n-hexane (4 times × 25 mL), n-pentane (4 times × 25 mL), methanol (4 times × 10 mL) and ether (2 times × 10 mL) respectively; drying at 65 deg.C for 2 hr to obtain final product potassium ferrate crystal (purple black) with purity of 96%, weighing, and placing into a dryer for use.
(2) Pre-oxidation of potassium ferrate
And (3) after the step (1) is finished, preparing the prepared potassium ferrate solid into a solution with the concentration of 0.02mol/L, and adjusting the pH value to 9-10. Preparing methyl orange simulated dye wastewater with the concentration of 50mg/L, placing the methyl orange simulated wastewater into a quartz glass vessel of a dielectric barrier plasma discharge device according to 75% of the volume of the glass vessel, and performing reaction according to the weight ratio of potassium ferrate: the volume ratio of the methyl orange wastewater is 1: 80 transferring the potassium ferrate solution to be added into the methyl orange wastewater for pre-oxidation for 20s, and lightening the color of the methyl orange wastewater.
(3) Form a DBD/Fenton-like synergistic reaction system to treat dye wastewater
And (3) after the step (2) is finished, adjusting the distance between the fixed quartz glass plate and the liquid level to be 5mm, starting a power supply, and preferably selecting 28.0 kV for the discharge output voltage of the DBD/Fenton-like synergistic reaction system for treating the dye wastewater and 20min for the discharge treatment time. With the increase of the reaction time, the color of the methyl orange wastewater gradually becomes lighter until the methyl orange wastewater is completely decolorized, and yellow brown ferric iron flocs are gradually formed.
(4) Flocculation of iron flocs
And (3) after the step (3) is finished, enabling tawny flocs to continuously appear in the reaction system, standing for 10 minutes, collecting supernate, putting the supernate into a centrifugal machine, and carrying out separation reaction for 2 minutes under the condition that the rotating speed of the centrifugal machine is 4000 rpm min < -1 >, wherein the supernate is the final effluent after the reaction is finished. The change condition of the methyl orange concentration along with the reaction time is measured, and the experimental result shows that the pH of the final effluent after 20 minutes is = 6.0-9.0, the chroma is less than or equal to 25 dilution times, the suspended matter is less than or equal to 30mg/L, the COD is less than or equal to 48mg/L, and the iron is less than or equal to 0.3 mg/L. Under the same experimental conditions, the final effluent pH of the simulated methyl orange wastewater treated by the dielectric barrier discharge plasma is = 6.0-9.0, the chroma is less than or equal to 62 dilution times, the suspended matter is less than or equal to 53mg/L, and the COD is less than or equal to 107 mg/L.
Example 3
A method for treating dye wastewater by using potassium ferrate in cooperation with dielectric barrier discharge plasma comprises the following specific steps:
(1) preparation of potassium ferrate
Preparing a proper amount of potassium hydroxide solution, and cooling to room temperature for later use; weighing a certain amount of calcium hypochlorite, putting the calcium hypochlorite into a small beaker, adding a certain volume of 13mol/L potassium hydroxide solution, slightly stirring the mixture by using a glass rod, performing suction filtration on the reacted solution by using filter cloth with the pore diameter of 800 meshes, and filtering impurities such as calcium hydroxide and the like to obtain yellow-green filtrate; adding 20mL of cooled saturated potassium hydroxide solution into the yellow-green filtrate in batches, controlling the reaction temperature, fully stirring, and performing suction filtration to remove impurities to obtain an alkaline saturated potassium hypochlorite solution; weighing a certain mass of Fe (NO3) 3.9H 2O, grinding into powder, slowly adding into an alkaline saturated potassium hypochlorite solution in batches under vigorous stirring, wherein the reaction is an exothermic reaction, controlling the reaction temperature to be 20 ℃ by using an ice-water bath, and fully stirring. The oxidation reaction is fast, and the color of the solution is quickly changed into purple black; after the mixture fully reacts for a certain time, adding a cooled saturated potassium hydroxide solution into the purple black solution, continuously stirring for 5 minutes, carrying out ice precipitation and standing, quickly carrying out suction filtration by using filter cloth, and discarding the filtrate to obtain a filter cake, namely a potassium ferrate crude product; the obtained potassium ferrate crude product is soaked and washed for 3 times by 3mol/L potassium hydroxide solution, 5mL of potassium ferrate is used for each time to dissolve the potassium ferrate, then the potassium ferrate is filtered by filter cloth, a filter cake is discarded, and a filtrate is reserved; pouring the filtrate into a long-neck flask, adding a certain volume of 13mol/L potassium hydroxide solution into the filtrate under the condition of ice-water bath, recrystallizing at the recrystallization temperature of 0 ℃, and quickly performing suction filtration by using filter cloth to obtain a filter cake, namely a potassium ferrate solid; washing the potassium ferrate solid with n-hexane (4 times × 25 mL), n-pentane (4 times × 25 mL), methanol (4 times × 10 mL) and ether (2 times × 10 mL) respectively; drying at 65 deg.C for 2 hr to obtain final product potassium ferrate crystal (purple black) with purity of 96%, weighing, and placing into a dryer for use.
(2) Pre-oxidation of potassium ferrate
And (3) after the step (1) is finished, preparing the prepared potassium ferrate solid into a solution with the concentration of 0.02mol/L, and adjusting the pH value to 9-10. Preparing crystal violet simulation dye wastewater with the concentration of 50mg/L, placing the crystal violet simulation wastewater into a quartz glass vessel of a dielectric barrier plasma discharge device according to 75% of the volume of the glass vessel, and performing reaction according to the weight ratio of potassium ferrate: the volume ratio of the crystal violet wastewater is 1: 80 transferring the potassium ferrate solution to be added into the crystal violet wastewater for pre-oxidation for 20s, and lightening the color of the methyl orange wastewater.
(3) Form a DBD/Fenton-like synergistic reaction system to treat dye wastewater
And (3) after the step (2) is finished, adjusting the distance between the fixed quartz glass plate and the liquid level to be 5mm, starting a power supply, and preferably selecting 28.0 kV for the discharge output voltage of the DBD/Fenton-like synergistic reaction system for treating the dye wastewater and 20min for the discharge treatment time. With the increase of the reaction time, the color of the crystal violet wastewater gradually becomes lighter until the crystal violet wastewater is completely decolorized, and yellow brown ferric iron flocs are gradually formed.
(4) Flocculation of iron flocs
And (3) after the step (3) is finished, enabling tawny flocs to continuously appear in the reaction system, standing for 10 minutes, collecting supernate, putting the supernate into a centrifugal machine, and carrying out separation reaction for 2 minutes under the condition that the rotating speed of the centrifugal machine is 4000 rpm min < -1 >, wherein the supernate is the final effluent after the reaction is finished. The change condition of the crystal violet concentration along with the reaction time is measured, and the experimental result shows that the pH of the final effluent after 20 minutes is = 6.0-9.0, the chroma is less than or equal to 25 dilution times, the suspended matter is less than or equal to 30mg/L, the COD is less than or equal to 50mg/L, and the iron is less than or equal to 0.3 mg/L. Under the same experimental conditions, the final effluent pH of the simulated crystal violet wastewater treated by the dielectric barrier discharge plasma is = 6.0-9.0, the chroma is less than or equal to 55 dilution times, the suspended matter is less than or equal to 60mg/L, and the COD is less than or equal to 117 mg/L.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the present invention has been described in detail by referring to the preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (4)
1. A method for treating dye wastewater by potassium ferrate cooperating with dielectric barrier discharge plasma is characterized in that multiple water treatment technologies are integrated to form a pre-oxidation-dielectric barrier discharge plasma/Fenton-like-chemical coagulation system, the strong oxidizing property of hexavalent iron ions is fully utilized to carry out pre-oxidation on organic dye, and low-valent iron ions and the dielectric barrier discharge plasma are utilized to form the Fenton-like system, so that the utilization of active substances is effectively enhanced, the removal effect of the organic dye is improved, and ferric iron floc is formed to further remove pollutants.
2. The method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma according to claim 1, wherein the ratio of potassium ferrate to dielectric barrier discharge plasma is as follows: the volume ratio of the simulated wastewater is 1: 70-1: 80, transferring the potassium ferrate solution, adding the potassium ferrate solution into the dye wastewater, and pre-oxidizing for 10-30 s to lighten the color of the dye wastewater.
3. The method for treating dye wastewater by using potassium ferrate in cooperation with dielectric barrier discharge plasma according to claim 1, wherein the distance between a fixed quartz glass plate and the liquid level is adjusted to be 5mm, the discharge output voltage of the DBD/Fenton-like synergistic reaction system for treating dye wastewater is preferably 16.8kV to 28.0 kV, and the discharge treatment time is preferably 0 to 20 min.
4. The method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma as claimed in claim 1, wherein after standing for 10 minutes, collecting supernatant, placing the supernatant into a centrifuge, and performing separation reaction for 1-3 minutes at the rotation speed of the centrifuge of 4000 rpm-min-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110768467.0A CN113429058A (en) | 2021-07-07 | 2021-07-07 | Method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110768467.0A CN113429058A (en) | 2021-07-07 | 2021-07-07 | Method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113429058A true CN113429058A (en) | 2021-09-24 |
Family
ID=77759523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110768467.0A Pending CN113429058A (en) | 2021-07-07 | 2021-07-07 | Method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113429058A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101088926A (en) * | 2006-06-12 | 2007-12-19 | 深圳职业技术学院 | Combined water-treating farrate-fenton reagent process |
| CN104058481A (en) * | 2014-06-30 | 2014-09-24 | 广西大学 | Dielectric barrier discharge plasma-fenton-like-photocatalysis method for degrading organic matter |
| CN105417672A (en) * | 2015-11-11 | 2016-03-23 | 青岛农业大学 | Method and system for online preparing ferrate to process sewage |
| CN112299518A (en) * | 2020-10-28 | 2021-02-02 | 常熟理工学院 | Preparation method and application of magnesium-iron-manganese-based efficient wastewater treatment agent |
| CN112374586A (en) * | 2020-10-29 | 2021-02-19 | 南京林业大学 | Method for removing organic matters in water by improving plasma-Fenton reaction |
-
2021
- 2021-07-07 CN CN202110768467.0A patent/CN113429058A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101088926A (en) * | 2006-06-12 | 2007-12-19 | 深圳职业技术学院 | Combined water-treating farrate-fenton reagent process |
| CN104058481A (en) * | 2014-06-30 | 2014-09-24 | 广西大学 | Dielectric barrier discharge plasma-fenton-like-photocatalysis method for degrading organic matter |
| CN105417672A (en) * | 2015-11-11 | 2016-03-23 | 青岛农业大学 | Method and system for online preparing ferrate to process sewage |
| CN112299518A (en) * | 2020-10-28 | 2021-02-02 | 常熟理工学院 | Preparation method and application of magnesium-iron-manganese-based efficient wastewater treatment agent |
| CN112374586A (en) * | 2020-10-29 | 2021-02-19 | 南京林业大学 | Method for removing organic matters in water by improving plasma-Fenton reaction |
Non-Patent Citations (1)
| Title |
|---|
| 杨依: "高铁酸钾联合DBD等离子体污泥预处理的研究" * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Cui et al. | Electrochemical/peroxydisulfate/Fe3+ treatment of landfill leachate nanofiltration concentrate after ultrafiltration | |
| CN106915802B (en) | Integrated electrochemical reaction device for treating refractory organic wastewater and treatment method | |
| Ozyonar et al. | Treatment of pretreated coke wastewater by electrocoagulation and electrochemical peroxidation processes | |
| CN101555082B (en) | Waste water treatment method and device combining electrochemical degradation and photocatalytic oxidation technologies | |
| WO2013156002A1 (en) | Nano catalyst electrolysis flocculation air flotation device | |
| CN111517428B (en) | Treatment process and system for removing heavy metal ions in PTA wastewater | |
| CN102701496A (en) | Method and process for treating high-concentration organic wastewater difficult to degrade | |
| CN103754994B (en) | Glow discharge plasma water treatment method and device | |
| CN104891611B (en) | Electrochemical oxidation device | |
| CN115215492B (en) | Electric flocculation-ozone catalytic oxidation-ceramic membrane coupling water treatment technology for removing residual medicines in pharmaceutical wastewater | |
| CN113929187B (en) | Anode electrochemical oxidation water treatment method by coupling active chlorine with hydroxyl radical | |
| CN110894125A (en) | Sewage treatment process for recycling N-methyl pyrrolidone | |
| CN105152429A (en) | Method for efficiently removing organic pollutants in industrial wastewater | |
| CN104710057A (en) | Papermaking wastewater treatment apparatus | |
| CN102020384A (en) | Method for handling organic wastewater based on Fenton reaction | |
| da Silva et al. | Polishing of treated textile effluent using combined electrochemical oxidation and ozonation technique | |
| CN111960602B (en) | Method for treating electroplating wastewater by using electrocoagulation/electrochemical oxidation coupling process | |
| CN109626494B (en) | Ultraviolet strong oxygen advanced water treatment method and device | |
| CN113429058A (en) | Method for treating dye wastewater by using potassium ferrate and dielectric barrier discharge plasma | |
| CN114538678B (en) | Dye wastewater treatment method by coupling ozone oxidation with electrocatalytic reduction | |
| CN108906073B (en) | Catalyst for industrial wastewater decolorization, decolorization device and decolorization method thereof | |
| CN203781882U (en) | Oxidation-flocculation complex bed device for landfill leachate | |
| CN106315936A (en) | Treatment method of bromamine acid wastewater | |
| Xie et al. | Mechanism of enhanced degradation of antibiotic wastewater by three-dimensional electrocatalytic oxidation system: Coconut shell biochar as particle electrode | |
| CN108892288B (en) | Electrocatalysis high-efficiency decolorization method and device for oil field waste liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210924 |
|
| WD01 | Invention patent application deemed withdrawn after publication |