CN110357217A - A kind of application of the fixed iron powder electrode of magnetic force in the treatment of waste water - Google Patents
A kind of application of the fixed iron powder electrode of magnetic force in the treatment of waste water Download PDFInfo
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- CN110357217A CN110357217A CN201910535402.4A CN201910535402A CN110357217A CN 110357217 A CN110357217 A CN 110357217A CN 201910535402 A CN201910535402 A CN 201910535402A CN 110357217 A CN110357217 A CN 110357217A
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- iron powder
- waste water
- magnetic force
- electrode
- treatment
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 125
- 239000002351 wastewater Substances 0.000 title claims abstract description 58
- 239000011159 matrix material Substances 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- 230000036647 reaction Effects 0.000 claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 44
- 239000011574 phosphorus Substances 0.000 claims description 44
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 42
- 229910052742 iron Inorganic materials 0.000 claims description 28
- KACAUYDQOUENGF-UHFFFAOYSA-N [Ta].[Ru].[Ir] Chemical compound [Ta].[Ru].[Ir] KACAUYDQOUENGF-UHFFFAOYSA-N 0.000 claims description 25
- 239000000149 chemical water pollutant Substances 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 239000010936 titanium Substances 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 230000001376 precipitating effect Effects 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 238000009395 breeding Methods 0.000 claims description 2
- 230000001488 breeding effect Effects 0.000 claims description 2
- 230000005518 electrochemistry Effects 0.000 claims description 2
- 238000003411 electrode reaction Methods 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000010907 mechanical stirring Methods 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 30
- 238000005189 flocculation Methods 0.000 abstract description 11
- 230000016615 flocculation Effects 0.000 abstract description 11
- 239000005416 organic matter Substances 0.000 abstract description 7
- 229910021645 metal ion Inorganic materials 0.000 abstract description 6
- 229910019142 PO4 Inorganic materials 0.000 abstract description 4
- 239000010452 phosphate Substances 0.000 abstract description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 230000003647 oxidation Effects 0.000 description 16
- 238000007254 oxidation reaction Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 14
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 9
- 239000000460 chlorine Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- 235000002639 sodium chloride Nutrition 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 4
- 235000019796 monopotassium phosphate Nutrition 0.000 description 4
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 3
- 235000011130 ammonium sulphate Nutrition 0.000 description 3
- 238000003889 chemical engineering Methods 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 238000006056 electrooxidation reaction Methods 0.000 description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 3
- 229910052741 iridium Inorganic materials 0.000 description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 3
- 229910052707 ruthenium Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 2
- -1 iron ion Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910001000 nickel titanium Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 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
- 241000196324 Embryophyta Species 0.000 description 1
- 235000010931 Mesua ferrea Nutrition 0.000 description 1
- 235000005704 Olneya tesota Nutrition 0.000 description 1
- 240000007909 Prosopis juliflora Species 0.000 description 1
- 235000008198 Prosopis juliflora Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 239000013335 mesoporous material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000000271 synthetic detergent Substances 0.000 description 1
- 239000006273 synthetic pesticide Substances 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
- 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
-
- 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
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
- 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
- C02F2001/46138—Electrodes comprising a substrate and a coating
-
- 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
- C02F2001/46138—Electrodes comprising a substrate and a coating
- C02F2001/46142—Catalytic coating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a kind of application of the fixed iron powder electrode of magnetic force in the treatment of waste water, comprising the following steps: (1) iron powder is fixed on matrix by magnetic force, as composite anode；Using inert electrode as cathode, electrochemical reactor is constructed；(2) waste water to be processed is added in the electrochemical reactor, carries out cell reaction, precipitated, be separated by solid-liquid separation after reaction.The present invention, as anode, can be played the role of electroxidation and two kinds of electric flocculation simultaneously, can effectively remove organic matter, ammonia nitrogen, phosphate and metal ion in waste water simultaneously using the fixed iron powder electrode of magnetic force.
Description
Technical field
The present invention relates to sewage treatment field more particularly to a kind of fixed iron powder electrode of magnetic force answering in the treatment of waste water
With.
Background technique
With being continuously increased for rapid development of economy and mankind's activity range, the phenomenon that water body deteriorates, water function is lost
It is more serious.Wastewater emission amount is continuously increased, and chemical fertilizer, synthetic detergent and pesticide are widely used, and is caused in water body
The nutriments such as nitrogen, phosphorus and organic concentration constantly increase, it has also become one of the environmental problem that the mankind pay close attention to the most.Nitrogenous,
The processing of phosphorus and organic wastewater is particularly important to the control of water resource pollution.
In recent years, electrochemical techniques because its reaction process it is short, occupied area is small, easy to operate, and removal efficiency is high and not
The advantages that meeting or seldom generation secondary pollution, has received widespread attention in field of waste water treatment.
Electric flocculation is a kind of lower electrochemical techniques of sludge yield, by dissolving metal ion out from metal electrode,
Metal ion passes through a series of hydrolysis, polymerization process, forms a variety of hydroxo complexes and hydroxide, the adsorption energy of these products
Power is very strong, can play the role of heavy metal and organic matter in cohesion and absorption effluent, and the metal iron ion dissolved out is formed
Hydroxide can with phosphate reaction formed ferro-phosphorus sediment, and achieve the purpose that remove Phosphorus From Wastewater.Example
Such as, the Chinese patent literature of Publication No. CN109607708A discloses the electric flocculation processing method and electricity of a kind of heavy metal wastewater thereby
Flocculation plant.The invention in conjunction with electric flocculation technique, can effectively improve the electrolysis of heavy metal containing wastewater treatment using mesoporous material
Efficiency, and structure is simple, disassembly and easy to clean, heavy metal containing wastewater treatment excellent effect.
Electroxidation can significantly reduce rubbish by direct oxidation and indirect oxidation effect as a kind of advanced oxidation processes
The concentration of organic pollutant and ammonia nitrogen in percolate.Direct oxidation refers to that organic compound and ammonia nitrogen can be by anode surfaces
Electronics transfer directly occurs and is oxidized and removes.Indirect oxidation refers to pollutant intermediate oxidation agent caused by anode reaction
It is degraded, wherein Active Chlorine is main indirect oxidation agent in wastewater treatment.For example, the China of Publication No. CN106315937A
Patent document discloses the method that a kind of pair of ammonia nitrogen in high density chemical engineering sewage carries out Electrooxidation degradation, and this method includes following step
It is rapid: (1) to adjust pH value: stirring ammonia nitrogen in high density chemical engineering sewage to be processed, and adjust pH value to 7~11；(2) it filters: to process
The ammonia nitrogen in high density chemical engineering sewage of step (1) processing is filtered, and collects filtrate；(3) it is electrolysed: using netted Ti based DSA anode,
Plate titanium-based DSA cathode implements electroxidation to filtrate obtained by step (2)；Cl is added in electrolysis initial stage in filtrate-Salt and ClO-Salt,
It is electrolysed after 2~6h, adds Cl-Salt, and pH control is 7~11 in electrolytic process, to realize in Electrooxidation degradation sewage
The purpose of ammonia nitrogen.
But traditional iron plate anode limits its answering in the treatment of waste water because being easy to happen surface passivation phenomenon
With, and iron plate anode is for can not effectively aoxidize ammonia nitrogen and organic matter during electric flocculation.And it is used in electro-oxidation process
The inert anodes such as ruthenium-iridium-tantalum plate can not then dissolve metal ion out and play flocculation.
Summary of the invention
The present invention provides a kind of application of the fixed iron powder electrode of magnetic force in the treatment of waste water, using the fixed iron powder electricity of magnetic force
Pole can play the role of electroxidation and two kinds of electric flocculation as anode simultaneously, can effectively remove organic matter, ammonia in waste water simultaneously
Nitrogen, phosphate and metal ion.
Specific technical solution is as follows:
A kind of application of the fixed iron powder electrode of magnetic force in the treatment of waste water, comprising the following steps:
(1) iron powder is fixed on matrix by magnetic force, as composite anode；Using inert electrode as cathode, building electricity
Chemical reactor；
(2) waste water to be processed is added in the electrochemical reactor, carries out cell reaction, precipitated after reaction, is solid
Liquid separation.
Under the action of electric field, the Fe of composite anode generation2+、Fe3+By a series of hydrolysis, polymerization process, formed a variety of
Hydroxo complex and hydroxide, so that the colloid, suspended matter and organic matter in waste water are separated by flocculation.In addition,
Hydroxide is formed by when iron ion is discharged into water can form the sediment of ferro-phosphorus, iron with phosphate reaction
Hydroxo complex and hydroxide can also adsorb the phosphorus of organic in waste water, thus achieve the purpose that remove Phosphorus From Wastewater.
Use the electrode of higher catalytic activity as matrix, except through the phosphorus and organic matter in flocculation removal waste water
Outside, the nitrogen and organic matter in waste water can also be removed by oxidation.
Preferably, the matrix is graphite flake, titanium plate, stainless steel plate, ruthenium-iridium-tantalum plate or aluminium sheet.
Inert electrode containing ruthenium, iridium or titanium is because of its good electrocatalysis characteristic, high stability, as fixed iron powder
Matrix when, the composite anode being combined into can play the role of two kinds of electroxidation, electric flocculation simultaneously.
Ammonia nitrogen and partial organic substances in waste water directly occur electronics transfer on ruthenium, iridium or Ni―Ti anode surface and are removed,
This is direct oxidation process；In addition, ruthenium, iridium or Ni―Ti anode oxygen evolution potential with higher, analysis oxygen side reaction is few, has in waste water
Cl-In the presence of, Cl-It can be lost at anode and be electronically generated Cl2, Cl2It is dissolved in water and generates HClO and GlO-, these centres generated
For oxidant by partial organic substances and ammonium oxidation, this is indirect oxidation process.It is direct that ammonia nitrogen and part in waste water have object to pass through
Oxidation and two processes of indirect oxidation and remove.
The iron powder is at least one of nano zero valence iron, micron order reduced iron powder, iron filings and iron plane flower.
Preferably, in the composite anode, the dosage of iron powder is 0.01~40g/cm2；Further preferably 0.01~
0.15g/cm2。
The dosage of iron powder refers to the quality for the iron powder fixed on the substrate surface of unit area.
Increasing iron powder usage amount influences less the removal effect of TOC and total phosphorus, but is unfavorable for the removal of ammonia nitrogen.
Preferably, iron powder is fixed on matrix by magnet；The magnetic field strength of magnet is greater than 0 Gauss.The magnetic field of magnet
Intensity is selected according to the type of iron powder.
In step (2), the pH value of waste water is adjusted, makes the pH value 3~11 of reaction system；Further preferably 3~7.
Reaction system does not influence the removal of ammonia nitrogen when being alkalinity, but is unfavorable for the removal of phosphorus.
In step (2), the spacing of composite anode and cathode is 0.5~200cm, and electrode voltage is 4~40V.
In order to accelerate reaction efficiency, in step (2), it is stirred during cell reaction；The mode of stirring is to expose air
Stirring exposes stirring of inert gas or mechanical stirring.
In step (2), the every batch of electrode reaction time is O.5~36h.After the completion of cell reaction, composite anode surface
Iron powder dissolution, magnet and matrix for fixing iron powder can recycle reuse.
Processing method of the invention is suitable for handling the waste water of phosphorous, ammonia nitrogen, metal ion.Preferably, described wait locate
Reason waste water is eutrophic wastewater, landfill leachate, industrial phosphorized waste water, plating phosphorus-containing wastewater or breeding wastewater.
Compared with prior art, the invention has the benefit that
(1) present invention can realize simultaneously electrification using a kind of fixed iron powder electrode of magnetic force in an electrochemical reactor
It learns oxidation and electrochemistry is flocculated two kinds and acted on；
(2) treatment process cleaning of the present invention adds flocculant without outside, and sludge yield is low, reactor construction method letter
Single, process cycle is short；
(3) present invention is cheap and easy to get using electrode material, and the magnet and matrix for fixing iron powder are reusable, source of iron
It can be discarded iron filings, save processing cost, improve the level of resources utilization, have a good application prospect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of electrochemical reactor of the invention.
Specific embodiment
Fig. 1 is the structural schematic diagram of electrochemical reactor of the invention, which includes electrochemical reaction slot,
It is equipped with inert electrode 4 in slot and is used as cathode, by magnet 3 by iron powder 1 (nano zero valence iron, micron order reduced iron powder, iron filings or iron
Wood shavings etc.) it is fixed on matrix 2 as composite anode, cathode connects D.C. regulated power supply 5 with composite anode, exposure is additionally provided in slot
Gas agitating apparatus 6, trench bottom are equipped with water outlet 7.Following embodiment is all made of the electrochemical reactor.
Embodiment 1
Using graphite flake as matrix, micron order zeroth order iron powder is fixed on graphite flake surface composition compound electric using magnet
Pole, and electrochemical reactor is constructed by cathode of graphite flake.
Phosphorous simulated wastewater is configured by potassium dihydrogen phosphate, and initial phosphorus concentration is 100mg/L (in terms of P).
By in the phosphorous simulated wastewater injection electrochemical reactor of configuration, iron powder usage amount is 0.02g/cm2, pH value 5,
Pole plate spacing is 1cm, by the way of exposing nitrogen gas stirring, is staticly settled after cell reaction 3h under conditions of tank voltage is 10V
It is separated from water flocculate, the concentration of measurement water outlet phosphorus, and calculate the removal rate of phosphorus.
The result shows that the magnetic force using micron order zeroth order iron powder as source of iron, graphite for matrix fixes iron powder electrode as anode
Electrochemical reactor treated simulated wastewater, tp removal rate is up to 99.63%.This illustrates the fixed iron powder electrode tool of magnetic force
There is excellent phosphor-removing effect.
Embodiment 2
Using ruthenium-iridium-tantalum plate as matrix, using magnet by micron order zeroth order iron powder be fixed on ruthenium-iridium-tantalum plate surface form it is compound
Electrode, and electrochemical reactor is constructed by cathode of graphite flake.
Nitrogenous, phosphorus simulated wastewater is configured by potassium dihydrogen phosphate, ammonium sulfate, sodium chloride, and sodium chloride is to provide chloride ion
Intermediate oxidation agent is generated, initial ammonia nitrogen concentration is 200mg/L (in terms of N), and initial phosphorus concentration is 100mg/L (in terms of P), initial chlorine
Ion concentration is 500mg/L (in terms of Cl).
By in the simulated wastewater injection electrochemical reactor of the nitrogenous and phosphorus of configuration, iron powder usage amount is 0.01g/cm2, pH
Value is 5, and pole plate spacing is 1cm, quiet after cell reaction 4h under conditions of tank voltage is 10V by the way of exposing nitrogen gas stirring
Setting precipitating is separated from water flocculate, the concentration of measurement water outlet nitrogen and phosphorus, and calculates the removal rate of nitrogen and phosphorus.
The result shows that being that matrix magnetic force fixes iron powder electrode as sun using micron order zeroth order iron powder as source of iron, ruthenium-iridium-tantalum plate
The electrochemical reactor of pole treated simulated wastewater, nitrogen, tp removal rate are respectively up to 99.07% and 100%.This illustrate with
The fixed iron powder electrode of the magnetic force that micron order zeroth order iron powder is source of iron, ruthenium-iridium-tantalum is matrix has the effect of synchronous denitrification dephosphorizing.
Embodiment 3
Using ruthenium-iridium-tantalum plate as matrix, discarded iron filings are fixed on ruthenium-iridium-tantalum plate surface composition combination electrode using magnet,
And electrochemical reactor is constructed by cathode of titanium plate.
Nitrogenous, phosphorus simulated wastewater is configured by potassium dihydrogen phosphate, ammonium sulfate, sodium chloride, and sodium chloride is used to provide chloride ion
Intermediate oxidation agent is generated, initial ammonia nitrogen concentration is 200mg/L (in terms of N), and initial phosphorus concentration is 100mg/L (in terms of P), initial chlorine
Ion concentration is 500mg/L (in terms of Cl).
By in the simulated wastewater injection electrochemical reactor of the nitrogenous and phosphorus of configuration, iron filings usage amount is 0.05g/cm2, pH
Value is 7, and pole plate spacing is 1cm, quiet after cell reaction 4h under conditions of tank voltage is 10V by the way of exposing air stirring
Setting precipitating is separated from water flocculate, the concentration of measurement water outlet nitrogen and phosphorus, and calculates the removal rate of nitrogen and phosphorus.
The result shows that the magnetic force using iron filings as source of iron, ruthenium-iridium-tantalum plate for matrix fixes iron powder electrode as the electrification of anode
Simulated wastewater after learning reactor for treatment, nitrogen, tp removal rate are respectively up to 99.00% and 100%.This is illustrated using iron filings as iron
Source, the fixed iron powder electrode of the magnetic force that ruthenium-iridium-tantalum is matrix have the effect of synchronous denitrification dephosphorizing.
Embodiment 4
Using ruthenium-iridium-tantalum plate as matrix, using magnet by micron order zeroth order iron powder be fixed on ruthenium-iridium-tantalum plate surface form it is compound
Electrode, and electrochemical reactor is constructed by cathode of graphite flake.
Aging landfill leachate without any processing, initial TOC concentration are 3043.5mg/L, and initial ammonia nitrogen concentration is
1671.9mg/L (in terms of N), initial total phosphorus concentration be 19.5mg/L (in terms of P), initial chlorine ion concentration be 2380.5mg/L (with
Cl meter).The initial pH of landfill leachate is 8.5.
Landfill leachate is injected in electrochemical reactor, iron powder usage amount is 0.02g/cm2, pole plate spacing is 1cm, is adopted
With churned mechanically mode, staticly settling after cell reaction 4h under conditions of tank voltage is 10V is separated from water flocculate, surveys
Determine TOC of yielding water, ammonia nitrogen, the concentration of total phosphorus, and calculates TOC, ammonia nitrogen, the removal rate of total phosphorus.
The result shows that using micron order zeroth order iron powder as source of iron, ruthenium-iridium-tantalum plate for matrix the fixed iron powder electrode of magnetic force as
The electrochemical reactor of anode treated landfill leachate, the removal rate of TOC, ammonia nitrogen and total phosphorus are respectively 72.55%,
97.94% and 98.00%.This explanation is the fixed iron powder electricity of magnetic force of matrix by source of iron, ruthenium-iridium-tantalum plate of micron order zeroth order iron powder
The great ability for having excellent processing landfill leachate.
Embodiment 5
Using ruthenium-iridium-tantalum plate as matrix, using magnet by nanoscale zero-valent iron powder be fixed on ruthenium-iridium-tantalum plate surface form it is compound
Electrode, and electrochemical reactor is constructed by cathode of graphite flake.
Aging landfill leachate without any processing, initial TOC concentration are 3076.5mg/L, and initial ammonia nitrogen concentration is
1676.7mg/L (in terms of N), initial phosphorus concentration be 19.13mg/L (in terms of P), initial chlorine ion concentration be 2405.5mg/L (with
Cl meter).Landfill leachate initial pH value is 8.5.
Landfill leachate is injected in electrochemical reactor, iron powder usage amount is 0.02g/cm2, pole plate spacing is 1cm, is adopted
With churned mechanically mode, staticly settling after cell reaction 4h under conditions of tank voltage is 10V is separated from water flocculate, surveys
Determine TOC of yielding water, ammonia nitrogen, the concentration of total phosphorus, and calculates TOC, ammonia nitrogen, the removal rate of total phosphorus.
The result shows that being handled by the electrochemical reactor of the magnetic force of matrix fixed iron powder electrode as anode of ruthenium-iridium-tantalum plate
Landfill leachate afterwards, the removal rate of TOC, ammonia nitrogen and total phosphorus are respectively 68.95%, 95.48% and 96.39%.This explanation with
The fixed iron powder electrode of the magnetic force that nano zero-valence iron powder is source of iron, ruthenium-iridium-tantalum is matrix has the energy of excellent processing landfill leachate
Power.
Embodiment 6
Using ruthenium-iridium-tantalum plate as matrix, using magnet by nanoscale zero-valent iron powder be fixed on ruthenium-iridium-tantalum plate surface form it is compound
Electrode, and electrochemical reactor is constructed by cathode of graphite flake.
Aging landfill leachate without any processing, initial TOC concentration are 3098.0mg/L, and initial ammonia nitrogen concentration is
1723.5mg/L (in terms of N), initial phosphorus concentration be 18.85mg/L (in terms of P), initial chlorine ion concentration be 2395.5mg/L (with
Cl meter).Landfill leachate initial pH value is 8.5.
Landfill leachate is injected in electrochemical reactor, iron powder usage amount is 0.15g/cm2, pole plate spacing is 1cm, is adopted
With churned mechanically mode, staticly settling after cell reaction 4h under conditions of tank voltage is 10V is separated from water flocculate, surveys
Determine TOC of yielding water, ammonia nitrogen, the concentration of total phosphorus, and calculates TOC, ammonia nitrogen, the removal rate of total phosphorus.
The result shows that being handled by the electrochemical reactor of the magnetic force of matrix fixed iron powder electrode as anode of ruthenium-iridium-tantalum plate
Landfill leachate afterwards, the removal rate of TOC, ammonia nitrogen and total phosphorus are respectively 70.05%, 85.17% and 97.01%.This illustrates to increase
Add iron powder usage amount to influence less the removal effect of TOC and total phosphorus, but is unfavorable for the removal of ammonia nitrogen.
Embodiment 7
Using ruthenium-iridium-tantalum plate as matrix, using magnet by micron order zeroth order iron powder be fixed on ruthenium-iridium-tantalum plate surface form it is compound
Electrode, and electrochemical reactor is constructed by cathode of graphite flake.
Nitrogenous, phosphorus simulated wastewater is configured by potassium dihydrogen phosphate, ammonium sulfate, sodium chloride, and sodium chloride is to provide chloride ion
Intermediate oxidation agent is generated, initial ammonia nitrogen concentration is 200mg/L (in terms of N), and initial phosphorus concentration is 100mg/L (in terms of P), initial chlorine
Ion concentration is 500mg/L (in terms of Cl).
By in the simulated wastewater injection electrochemical reactor of the nitrogenous and phosphorus of configuration, iron powder usage amount is 0.01g/cm2, pH
Value is 11, and pole plate spacing is 1cm, quiet after cell reaction 4h under conditions of tank voltage is 10V by the way of exposing nitrogen gas stirring
Setting precipitating is separated from water flocculate, the concentration of measurement water outlet nitrogen and phosphorus, and calculates the removal rate of nitrogen and phosphorus.
The result shows that being that matrix magnetic force fixes iron powder electrode as sun using micron order zeroth order iron powder as source of iron, ruthenium-iridium-tantalum plate
The electrochemical reactor of pole treated simulated wastewater, nitrogen, tp removal rate are respectively up to 99.15% and 37.53%.This is illustrated
Reaction system does not influence the removal of ammonia nitrogen when being alkalinity, but is unfavorable for the removal of phosphorus.
Technical solution of the present invention and beneficial effect is described in detail in embodiment described above, it should be understood that
Above is only a specific embodiment of the present invention, it is not intended to restrict the invention, it is all to be done in spirit of the invention
Any modification, supplementary, and equivalent replacement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of application of the fixed iron powder electrode of magnetic force in the treatment of waste water, which comprises the following steps:
(1) iron powder is fixed on matrix by magnetic force, as composite anode；Using inert electrode as cathode, electrochemistry is constructed
Reactor；
(2) waste water to be processed is added in the electrochemical reactor, carries out cell reaction, after reaction precipitating, solid-liquid point
From.
2. the application of the fixed iron powder electrode of magnetic force according to claim 1 in the treatment of waste water, which is characterized in that described
Matrix is graphite flake, titanium plate, stainless steel plate, ruthenium-iridium-tantalum plate or aluminium sheet.
3. the application of the fixed iron powder electrode of magnetic force according to claim 1 in the treatment of waste water, which is characterized in that described
Iron powder is at least one of nano zero valence iron, micron order reduced iron powder, iron filings and iron plane flower.
4. the application of the fixed iron powder electrode of magnetic force according to claim 3 in the treatment of waste water, which is characterized in that described
In composite anode, the dosage of iron powder is 0.01~40g/cm2。
5. the application of the fixed iron powder electrode of magnetic force according to claim 1 in the treatment of waste water, which is characterized in that step
(2) in, the pH value of waste water is adjusted, makes the pH value 3~11 of reaction system.
6. the application of the fixed iron powder electrode of magnetic force according to claim 1 in the treatment of waste water, which is characterized in that step
(2) in, the spacing of composite anode and cathode is 0.5~200cm, and electrode voltage is 4~40V.
7. the application of the fixed iron powder electrode of magnetic force according to claim 1 in the treatment of waste water, which is characterized in that step
(2) in, the every batch of electrode reaction time is 0.5~36h.
8. the application of the fixed iron powder electrode of magnetic force according to claim 1 in the treatment of waste water, which is characterized in that step
(2) it in, is stirred during cell reaction；The mode of stirring is to expose air stirring, expose stirring of inert gas or mechanical stirring.
9. the application of the fixed iron powder electrode of magnetic force according to claim 1 in the treatment of waste water, which is characterized in that described
Waste water to be processed is eutrophic wastewater, landfill leachate, industrial phosphorized waste water, plating phosphorus-containing wastewater or breeding wastewater.
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| CN112575336A (en) * | 2020-11-19 | 2021-03-30 | 天津大学 | Method for obtaining super-strong industrial alkaline water oxygen evolution electrode by regulating and controlling anode surface magnetic field |
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