CN106517443A - Novel electro-Fenton system - Google Patents
Novel electro-Fenton system Download PDFInfo
- Publication number
- CN106517443A CN106517443A CN201611033216.3A CN201611033216A CN106517443A CN 106517443 A CN106517443 A CN 106517443A CN 201611033216 A CN201611033216 A CN 201611033216A CN 106517443 A CN106517443 A CN 106517443A
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- Prior art keywords
- fenton
- stpp
- oxygen
- electro
- anode
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Classifications
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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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
- C02F2201/4618—Supplying or removing reactants or electrolyte
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- 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
Abstract
The invention relates to an electro-Fenton system based on novel electrolyte. The system is used for efficiently removing hardly degradable organic wastewater. According to the system, an 8 cm*4cm iron sheet is taken as an anode, carbon felt in the same area is taken as a cathode, STPP (sodium tripolyphosphate) is adopted as electrolyte, oxygen with the flow of 1.8 L/min is introduced, the pH is adjusted to 6 with 0.1 M sulfuric acid, and the working current is 0.5 mA. A conventional electro-Fenton system is improved through a complex reaction of STPP and Fe<2+>. A produced complex and oxygen or super oxygen radical can produce hydrogen peroxide, so that the efficient oxidation capacity of the system is guaranteed, the system is ensured to have more hydroxyl free radical supply, and the degradation efficiency of the system is improved to a greater extent. Besides, the system utilizability is expanded by the aid of the wide pH optimum range, and the operation cost is reduced. The system adopts the simple process, is easy to operate, low in cost and good in controllability and provides technical support for large-scale application of the electro-Fenton system and wastewater treatment.
Description
Technical field
The present invention relates to technical field of waste water processing, and in particular to it is a kind of can more efficiently degradation of organic waste water electricity-
Fenton-like system.
Background technology
Electricity-Fenton process is Organic substance in water to be degraded using the strong oxidation performance of OH, key reaction equation
It is as follows：
O2 + 2H+ + 2e- → H2O2 (1)
H2O2 + Fe2+ → Fe3+ +·OH + OH- (2)
Fe3+ + e- → Fe2+ (3)
The method has the characteristics of simple to operate, reaction time is short, contaminant degradation is efficient and receives much attention.
Due to Fe in system2+/Fe3+Circulation be largely fixed the degradation rate of system.As Fe in course of reaction2 +/Fe3+, it is impossible to it is reduced to again Fe2+When, then OH cannot be generated with hydroperoxidation, cause system oxidation performance to reduce；
Excessive Fe3+With OH in water-Generate Fe（OH）3Precipitation, produces secondary pollution to water sample.Therefore in traditional electricity-Fenton body
During system's operation, to prevent the precipitation of iron cement, need its pH to be adjusted to 3 or so, this had both limited the practical application of system, increase again
Add dosing, increased processing cost.
People attempt to be improved from every side, such as：Cathode material will be modified, but not obtained preferable
Effect.
The content of the invention
A kind of deficiency of the present invention for traditional electricity-Fenton process, there is provided electricity-sweet smell by the use of sodium tripolyphosphate as electrolyte
System, the electricity-Fenton-like system after improvement can more efficiently process organic wastewater.
To reach above-mentioned purpose, the technical scheme is that：A kind of Novel electric-Fenton system, takes the organic waste of 50 mL
Water, is added thereto to sodium tripolyphosphate（STTP）, its concentration is 5 mM, reaction tank is placed on magnetic stirring apparatus and is fully stirred
Mix one minute, with the sulphur acid for adjusting pH value of 0.1M to 6 after taking-up.At ambient temperature, with ferroelectricity extremely anode, carbon felt is
Negative electrode, constitutes aseptate electricity-Fenton system, and the electrode spacing between negative electrode and anode is 3 cm；Electrolytic anode adopts diameter
For 4mm, the iron nail of long 9cm, electric current is adjusted to 0.5mA using the carbon felt of 8cm × 2cm while being passed through oxygen by negative electrode.
Compared with tradition electricity-Fenton system, beneficial effects of the present invention are as follows：
The use of STPP in the present invention provides new activated channel for molecular oxygen, generates more hydrogen peroxide, improves system
Oxidability.Secondly, STPP can be with electron reduction H in suppression system+, more polyelectron is made for Fe3+Reduction.It is most important
It is that the presence of STPP avoids Fe in system3+When excessive, Fe is generated（OH）3Precipitation.Meanwhile, the pH scopes of system have been widened, this is
The practical application of electricity-Fenton-like system provides safeguard.
Figure of description：
Fig. 1 is the check experiment result degraded using different electrolyte；
Fig. 2 is the check experiment result degraded under the conditions of different PH.
Specific embodiment
Theoretical foundation proposed by the present invention is：Overcome Fe in system2+/Fe3+The obstacle of circulation, improvement system are applicable
PH scopes, it is possible to have the lifting of matter to the operational efficiency of whole system.
The action principle of system is as follows：A large amount of Fe are separated out in oxidizing process Anodic2+, oxidized hydrogen peroxide generation hydroxyl
Free radical, itself is reduced into Fe3+.STPP and excessive Fe2+Generation complex reaction generates complex compound, and the complex compound can be with water
Middle O2 -、O2And H+Reaction generates H2O2。
2Fe (Ⅱ) - STPP + O2 + 2H+ = Fe(Ⅲ) - STPP + H2O2 (1)
Fe (Ⅱ) - STPP + O2 = Fe(Ⅲ) - STPP +·O2 - (2)
Fe (Ⅱ) - STPP + ·O2 -+2H+=Fe(Ⅲ) - STPP + H2O2(3)
Embodiment：A kind of Novel electric-Fenton system：
50ml organic wastewaters are taken, and puts into 0.092g sodium tripolyphosphates, reaction tank is positioned in magnetic stirring apparatus and is at the uniform velocity stirred
Take out after one minute, with the sulphur acid for adjusting pH of 0.1M to 6.
At ambient temperature, with ferroelectricity extremely anode, carbon felt is negative electrode, constitutes aseptate electricity-Fenton system, cloudy
Electrode spacing between pole and anode is 3 cm.
Electrolytic anode adopts a diameter of 4mm, the iron nail of long 9cm, carbon felt of the negative electrode using 8cm × 2cm, while using air pump
Air is passed through, size of current is adjusted to 0.5mA.
The system of the present invention that above-described embodiment is constituted is tested, and sets degradation cycle as one hour, and timing sampling is determined
Organic substance in water degradation rate.
Check experiment 1 is utilized respectively sodium sulphate, and ethylenediamine tetra-acetic acid is degraded as electrolyte, and other conditions are constant.
Fig. 1 is the result of three groups of tests.As seen from Figure 1, after one hour, sodium tripolyphosphate makees electricity to degraded experience
The degradation rate of solution matter up to 96% or so, and sodium sulphate, ethylenediamine tetra-acetic acid only have 60% and 80% or so respectively.
Check experiment 2 is utilized respectively the sulphur acid for adjusting pH of 0.1 M to 4,8,10,12, and other conditions are constant.Fig. 2 is five groups
The result of test.As seen from Figure 2, any moment in the degradation cycle, the system degradation rate of pH=6 is above which
The system degradation rate of his acidity.After completing the degraded of a hour, pH value of solution=4,6,8,10,12 degradation rate be respectively 91%,
96%th, 95%, 88%, 75% or so.To sum up, system degradation rate highest during Ph=6.
Claims (1)
1. a kind of Novel electric-Fenton system, it is characterised in that：The organic wastewater of 50 mL is taken, sodium tripolyphosphate is added thereto to
（STTP）, its concentration is 5 mM, and reaction tank is placed on magnetic stirring apparatus to carry out being sufficiently stirred for one minute, with 0.1M's after taking-up
Sulphur acid for adjusting pH value is to 6；At ambient temperature, with ferroelectricity extremely anode, carbon felt is negative electrode, constitutes aseptate electricity-sweet smell
System, the electrode spacing between negative electrode and anode is 3 cm；Electrolytic anode adopts a diameter of 4mm, the iron nail of long 9cm, negative electrode
Using the carbon felt of 8cm × 2cm, while being passed through oxygen, electric current is adjusted to into 0.5mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611033216.3A CN106517443A (en) | 2016-11-23 | 2016-11-23 | Novel electro-Fenton system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611033216.3A CN106517443A (en) | 2016-11-23 | 2016-11-23 | Novel electro-Fenton system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106517443A true CN106517443A (en) | 2017-03-22 |
Family
ID=58356364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611033216.3A Pending CN106517443A (en) | 2016-11-23 | 2016-11-23 | Novel electro-Fenton system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106517443A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021073486A1 (en) * | 2019-10-14 | 2021-04-22 | 四川大学 | Electrolysis-ozone-corrosion inhibitor/electrolysis-ozone-hydrogen peroxide-corrosion inhibitor coupling treatment method for toxic and refractory wastewater |
| CN113023839A (en) * | 2021-04-28 | 2021-06-25 | 辽宁科技学院 | Micro-electrolysis Fenton oxidation water treatment method activated by polyphosphate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6126838A (en) * | 1998-05-01 | 2000-10-03 | Industrial Technology Research Institute | Method of wastewater treatment by electrolysis and oxidization |
| CN103864183A (en) * | 2014-03-21 | 2014-06-18 | 华中师范大学 | Molecular oxygen activation-coupled water treatment method employing high-efficiency neutral electro-fenton oxidation |
| CN103956485A (en) * | 2014-01-21 | 2014-07-30 | 武汉理工大学 | Lithium iron phosphate electrode material having three-dimensional hierarchical structure, and preparation method thereof |
| CN106660837A (en) * | 2014-10-10 | 2017-05-10 | 久瑞高科技私人有限公司 | An apparatus for conducting an electro-fenton reaction for decomposing organic chemical compounds |
-
2016
- 2016-11-23 CN CN201611033216.3A patent/CN106517443A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6126838A (en) * | 1998-05-01 | 2000-10-03 | Industrial Technology Research Institute | Method of wastewater treatment by electrolysis and oxidization |
| CN103956485A (en) * | 2014-01-21 | 2014-07-30 | 武汉理工大学 | Lithium iron phosphate electrode material having three-dimensional hierarchical structure, and preparation method thereof |
| CN103864183A (en) * | 2014-03-21 | 2014-06-18 | 华中师范大学 | Molecular oxygen activation-coupled water treatment method employing high-efficiency neutral electro-fenton oxidation |
| CN106660837A (en) * | 2014-10-10 | 2017-05-10 | 久瑞高科技私人有限公司 | An apparatus for conducting an electro-fenton reaction for decomposing organic chemical compounds |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021073486A1 (en) * | 2019-10-14 | 2021-04-22 | 四川大学 | Electrolysis-ozone-corrosion inhibitor/electrolysis-ozone-hydrogen peroxide-corrosion inhibitor coupling treatment method for toxic and refractory wastewater |
| US11548797B2 (en) | 2019-10-14 | 2023-01-10 | Sichuan University | Method for electrolysis-ozone-corrosion inhibitor/electrolysis-ozone-hydrogen peroxide-corrosion inhibitor coupling treatment on toxic and refractory wastewater |
| CN113023839A (en) * | 2021-04-28 | 2021-06-25 | 辽宁科技学院 | Micro-electrolysis Fenton oxidation water treatment method activated by polyphosphate |
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