CN106006857A - Method for degrading organic dye wastewater through graphene electrode and photoelectric Feton cooperatively - Google Patents
Method for degrading organic dye wastewater through graphene electrode and photoelectric Feton cooperatively Download PDFInfo
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- CN106006857A CN106006857A CN201610547239.XA CN201610547239A CN106006857A CN 106006857 A CN106006857 A CN 106006857A CN 201610547239 A CN201610547239 A CN 201610547239A CN 106006857 A CN106006857 A CN 106006857A
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- electrode
- organic dye
- waste water
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- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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- 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
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
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- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
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- 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
-
- 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
- C02F2305/10—Photocatalysts
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- 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
Abstract
The invention discloses a method for degrading organic dye wastewater through graphene electrode and photoelectric Feton cooperatively. The method includes the steps that firstly, graphene and valence-variable metallic oxide are mixed, emulgator, absolute ethyl alcohol and teflon are added to the mixture in sequence, and the mixture is dispersed evenly through an ultrasound function till paste in a cohesion form is mixed and formed; then, the obtained paste is ground into a film, the film is attached to a nickel net and pressed into an electrode under certain pressure, and residues on the surface of the electrode are removed; the soaked electrode is placed in an infrared box to be dried, and a graphite composite electrode is obtained; the graphite composite electrode serves as the cathode, sheet iron serves as an anode, an illumination device is switched on, and organic dye wastewater is degraded by illuminating an electrolytic cell with sunlight. The sunlight is added to an electric Fenton reaction to form an electric Fenton system, and the method is applied to a dye wastewater treatment practice and improves dye wastewater degradation capacity.
Description
Technical field
The present invention relates to Organic Dyestuff Wastewater Treatment technical field, be specifically related to a kind of Graphene electrodes and the collaborative fall of photoelectricity Feton
The method solving organic dye waste water.
Background technology
Fenton high-level oxidation technology can be used to process waste water from dyestuff and various toxic organic pollutant.In Fenton reaction
The hydroxyl radical free radical activity generated is big, and oxidizing potential is high, can directly by oxidation operation mineralising, generation water, carbon dioxide and
Inorganic ions, Fenton system, mainly in the case of energising, produces H in cathode chamber electro-catalysis2O2, in the solution with appraise at the current rate
Metal ion is (such as Fe3+/Fe2+Deng) reaction generation strong oxidizer hydroxyl radical free radical (OH), OH activity is high, and oxidability is strong,
Can effectively degrade even mineralising toxic organic pollutants.
But, simple relies on Fenton oxidation technology poor to the degradation effect of waste water from dyestuff.
Summary of the invention
In order to solve the technical problem of dye wastewater degradation weak effect present in above-mentioned prior art, the present invention proposes a kind of stone
Ink alkene electrode and the method for photoelectricity Feton Synergistic degradation organic dye waste water, add to sunlight in Fenton reaction and formed
Photoelectro-Fenton process system, is applied in dye wastewater treatment practice, the method increases the degradation capability to waste water from dyestuff.
Its technical solution includes:
A kind of method of degrading organic dye waste water, comprises the following steps successively:
The first step, preparation electrolysis unit, the electrolyte including electrolysis bath, being positioned at electrolysis bath and two electrodes, wherein, with ferrum
Sheet is as anode, using graphite combination electrode as negative electrode, arranges magnetic stirring apparatus in described electrolysis bath；
Second step, illumination apparatus is set on described electrolysis unit side, opens electrolysis bath described in illumination apparatus sunlight,
Adding organic dye waste water in described electrolysis bath, open magnetic stirring apparatus, controlling voltage is 3～4V, organic dye waste water
PH is 3～5, at room temperature degrades organic dye waste water.
As a preferred version of the present invention, the preparation method of above-mentioned graphite combination electrode includes:
First, graphite and variable valency metal oxide are mixed, are added thereto to emulsifying agent, dehydrated alcohol and politef successively,
Ultrasonication makes it be uniformly dispersed, until being mixed to form the mastic of cohesion shape；
Secondly, gained mastic is rolled into the film that thickness is 2～3mm, and is attached on nickel screen, press under pressure
Make electrode, this electrode is soaked removing surface residue in organic solvent；
Finally, the electrode after soaking is placed in infrared case, arranges temperature 80 DEG C insulation 2h, obtains graphite combination electrode.
Preferably, electrolysis bath described in radiation of visible light is selected, it is seen that light is external lighting type.
Preferably, variable valency metal oxide is MnO2, nanometer Fe3O4Or nanometer Cu2O。
Preferably, under the pressure of 10～30MPa, it is pressed into electrode.
Preferably, above-mentioned organic solvent is acetone soln.
Preferably, above-mentioned dehydrated alcohol is 1～2:1 with the volume ratio of politef.
Compared with prior art, the present invention forms photoelectro-Fenton process during visible ray or sunlight add to Fenton reaction
In system, it is applied in dye wastewater treatment, can be with sensitizing dyestuff under visible light exposure, dye molecule can be broken down into little
Molecule and inorganic ions；Good with electric conductivity, the graphite that hydrogen-evolution overpotential is higher is that substrate cathode prepares material, is not sacrificing H2O2
On the basis of productivity, variable valency metal oxide is combined with graphite, prepares graphite combination electrode, by homemade graphite is combined
Electrode is as negative electrode, and it produces H2O2Electro-catalysis efficiency high, in Fenton system, the H that negative electrode is newly-generated2O2Can be direct
With metal-oxide generation heterogeneous Fenton, extend the sewage disposal pH scope of Fenton system, simple to operate, bar
Part is easily-controllable.
Fenton high-level oxidation technology is combined by the present invention with photocatalysis, and the two can have engine dyeing with concerted catalysis degraded
Material waste water, it is seen that light can have obvious concerted catalysis effect with sensitizing dyestuff, photoelectro-Fenton process system is effectively improved dyestuff and gives up
The mineralization degree of water.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings the present invention is described in further details:
Fig. 1 is installation drawing of the present invention；
Fig. 2 is in dark reaction, visible light photocatalysis, Fenton system and photoelectro-Fenton process system in the embodiment of the present invention 1
To 7g/L rhdamine B wastewater degradation kinetic curve figure；
Fig. 3 is the embodiment of the present invention 3 under different tableting pressure (respectively 10MPa, 20MPa, 25MPa, 30MPa) to dye
That expects wastewater degradation speed affects figure；
In Fig. 1,1, illumination apparatus, 2, electrolysis bath, 3, anode-iron plate, 4, negative electrode-graphite combination electrode, 5, unidirectional current
Source, 6, magnetic stirring apparatus.
Detailed description of the invention
The present invention proposes a kind of Graphene electrodes and the method for photoelectricity Feton Synergistic degradation organic dye waste water, in order to make this
Bright advantage, technical scheme are clearer, clear and definite, elaborate the present invention below in conjunction with specific embodiment.
As it is shown in figure 1, device of the present invention, including illumination apparatus 1, electrolysis unit 2 and magnetic stirring apparatus 6, wherein,
Illumination apparatus 1 is positioned at electrolysis unit side, and it provides light source to irradiate electrolysis unit 2, and light source can be with simulated solar irradiation, it is also possible to
For visible ray, electrolysis unit include electrolysis bath 2, the anode-iron plate 3 being positioned at electrolysis bath 2 and negative electrode-graphite combination electrode 4,
And it is positioned at the DC source 5 above electrolysis bath, given up to being passed through organic dyestuff therein in advance by magnetic stirring apparatus 6 at electrolysis bath 2
Water is sufficiently stirred for.
Below in conjunction with said apparatus and embodiment, the present invention will be further described.
Embodiment 1:
The present invention, the method for degrading organic dye waste water, specifically include following steps:
First prepare graphite combination electrode, weigh 10g graphite, add 2 " OP " emulsifying agents, 3mL dehydrated alcohol and 1.0g
Politef, ultrasonic making is uniformly dispersed, until mixture forms cohesion shape mastic, mastic is rolled into the film of about 2mm,
It is attached on stainless (steel) wire, under 30MPa pressure, suppresses to obtain electrode, in acetone soln, soak 2h remove electrode surface residual
Ethanol and " OP " emulsifying agent；In infrared case, 80 DEG C of insulation 2h, i.e. make graphite electrode, its final size: floor space × height
=1.0cm2×5mm；
Secondly, using the graphite combination electrode for preparing as negative electrode, iron plate, as anode, throws rhdamine B in electrolysis bath
Waste water, the dosage of rhdamine B waste water is 7g/L, and Fenton system applied voltage is 3V, by sulphuric acid regulation dye
The pH of material waste water is 3.5, it is seen that light is external lighting type, and employing light source is simulated solar irradiation, and waste water processes and carries out under stirring at room temperature；
Finally, dark reaction, visible light photocatalysis, Fenton system (be not added with light, be energized, stirring) and photoelectricity are carried out respectively
Fenton system (visible light exposure, energising, stirring) experiment, degradation kinetics curve is shown in Fig. 2.
In degradation results: 120min, the clearance to peacock green is respectively 0.3%, and 3.5%, 78.5% and 99.7%, photoelectro-Fenton process
System is greatly improved the removal efficiency to rhdamine B waste water.
Embodiment 2:
The present invention, the method for degrading organic dye waste water, specifically include following steps:
Prepare graphene combination electrode, weigh 8g Graphene, add 1 " OP " emulsifying agent, 2mL dehydrated alcohol and 1.0g poly-
Tetrafluoroethene, ultrasonic making is uniformly dispersed, until mixture forms cohesion shape mastic, mastic is rolled into the film of about 2mm, attached
On stainless (steel) wire, under 20MPa pressure, suppress to obtain electrode, in acetone soln, soak 2h remove the second of electrode surface residual
Alcohol and " OP " emulsifying agent；In infrared case, 80 DEG C of insulation 2h, i.e. make graphite electrode, its final size: floor space × height=1.0
cm2×5mm；
Being negative electrode by the Graphene electrodes prepared, iron plate is anode, and the dosage of rhdamine B waste water is 5g/L, electricity
Fenton system applied voltage is 4V；Sulfur acid for adjusting pH is 3.5, sunlight irradiation, and waste water processes and carries out under stirring at room temperature.
In degradation results: 80min, the clearance to rhodamine B is respectively 97.5%.
Embodiment 3:
The present invention, the method for degrading organic dye waste water, specifically include following steps:
Weigh 8.5g Graphene, add 1 " OP " emulsifying agent, 2.5mL dehydrated alcohol and 1.0g politef, super
Sound makes to be uniformly dispersed, until mixture forms cohesion shape mastic, mastic is rolled into the film of about 2mm, is attached to stainless (steel) wire
On, suppress to obtain Graphene electrodes at various pressures, in acetone soln soak 2h remove electrode surface residual ethanol and
" OP " emulsifying agent, in infrared case, 80 DEG C of insulation 2h, i.e. make graphite electrode, its final size: floor space × height=1.0cm2×5
mm；
Being negative electrode by the high pure graphite electrode prepared, iron plate is anode, and the dosage of methyl orange dye waste water is 4g/L, electricity
Fenton system applied voltage is 4V；Sulfur acid for adjusting pH is 3.0, sunlight irradiation, and waste water processes and carries out under stirring at room temperature.
In 120min, the clearance to Methyl Orange in Wastewater is 98.6%.Respectively under 10MPa, 20MPa, 25MPa, 30MPa tableting pressure
To dye wastewater degradation, the figure that affects of degradation rate is shown in Fig. 3.
It should be noted that any equivalent way that those skilled in the art are made under the teaching of this specification, or substantially become
Type mode all should be within the scope of the present invention.
Claims (7)
1. the method for a degrading organic dye waste water, it is characterised in that comprise the following steps successively:
The first step, preparation electrolysis unit, the electrolyte including electrolysis bath, being positioned at electrolysis bath and two electrodes, wherein, with ferrum
Sheet is as anode, using graphite combination electrode as negative electrode, arranges magnetic stirring apparatus in described electrolysis bath；
Second step, illumination apparatus is set on described electrolysis unit side, opens electrolysis bath described in illumination apparatus sunlight,
Adding organic dye waste water in described electrolysis bath, open magnetic stirring apparatus, controlling voltage is 3～4V, organic dye waste water
PH is 3～5, at room temperature degrades organic dye waste water.
The method of degrading organic dye waste water the most according to claim 1, it is characterised in that the preparation of described graphite combination electrode
Method includes:
First, graphite and variable valency metal oxide are mixed, are added thereto to emulsifying agent, dehydrated alcohol and politef successively,
Ultrasonication makes it be uniformly dispersed, until being mixed to form the mastic of cohesion shape；
Secondly, gained mastic is rolled into the film that thickness is 2～3mm, and is attached on nickel screen, press under pressure
Make electrode, this electrode is soaked removing surface residue in organic solvent；
Finally, the electrode after soaking is placed in infrared case, arranges temperature 80 DEG C insulation 2h, obtains graphite combination electrode.
The method of degrading organic dye waste water the most according to claim 1, it is characterised in that: select and be electrolysed described in radiation of visible light
Groove, described visible ray is external lighting type.
The method of degrading organic dye waste water the most according to claim 2, it is characterised in that: described variable valency metal oxide is
MnO2, nanometer Fe3O4Or nanometer Cu2O。
The method of degrading organic dye waste water the most according to claim 2, it is characterised in that: press under the pressure of 10～30MPa
Make electrode.
The method of degrading organic dye waste water the most according to claim 2, it is characterised in that: described organic solvent is acetone soln.
The method of degrading organic dye waste water the most according to claim 2, it is characterised in that: described dehydrated alcohol and polytetrafluoroethyl-ne
The volume ratio of alkene is 1～2:1.
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| CN201610547239.XA CN106006857A (en) | 2016-07-12 | 2016-07-12 | Method for degrading organic dye wastewater through graphene electrode and photoelectric Feton cooperatively |
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| CN201610547239.XA CN106006857A (en) | 2016-07-12 | 2016-07-12 | Method for degrading organic dye wastewater through graphene electrode and photoelectric Feton cooperatively |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107352703A (en) * | 2017-05-19 | 2017-11-17 | 江苏大地益源环境修复有限公司 | A kind of nearly method and apparatus in situ for removing heavy metal ion in underground water |
| CN108190997A (en) * | 2017-12-08 | 2018-06-22 | 浙江工业大学 | A kind of intensive control method of photoelectricity Fenton pretreatment tea polyphenols pharmacy waste water |
| CN108249545A (en) * | 2018-03-09 | 2018-07-06 | 南京大学 | A kind of photoelectricity-Fenton azo dye wastewaters treatment reactor and application method |
| CN109399765A (en) * | 2017-08-16 | 2019-03-01 | 南京理工大学 | Utilize the method for amorphous alloy electrochemical degradation azo dyes |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107352703A (en) * | 2017-05-19 | 2017-11-17 | 江苏大地益源环境修复有限公司 | A kind of nearly method and apparatus in situ for removing heavy metal ion in underground water |
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| CN109399765A (en) * | 2017-08-16 | 2019-03-01 | 南京理工大学 | Utilize the method for amorphous alloy electrochemical degradation azo dyes |
| CN108190997A (en) * | 2017-12-08 | 2018-06-22 | 浙江工业大学 | A kind of intensive control method of photoelectricity Fenton pretreatment tea polyphenols pharmacy waste water |
| CN108249545A (en) * | 2018-03-09 | 2018-07-06 | 南京大学 | A kind of photoelectricity-Fenton azo dye wastewaters treatment reactor and application method |
| CN108249545B (en) * | 2018-03-09 | 2023-12-26 | 南京大学 | photoelectric-Fenton azo dye wastewater treatment reactor and use method thereof |
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Application publication date: 20161012 |