CN105836851A - Graphene based water treatment device and method - Google Patents
Graphene based water treatment device and method Download PDFInfo
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- CN105836851A CN105836851A CN201510718475.9A CN201510718475A CN105836851A CN 105836851 A CN105836851 A CN 105836851A CN 201510718475 A CN201510718475 A CN 201510718475A CN 105836851 A CN105836851 A CN 105836851A
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Abstract
The invention provides a monolayer iron oxide-graphene based electrocatalytic water treatment device and method. In a preparation process, a metal oxide that is supposed to inactivate a metal electrode becomes a nano-coating with catalytic activity so as to achieve an efficient pollutant removal effect. The key point of the method lies in synthesis of monolayer iron oxide and the making process of a monolayer iron oxide electrode, thus making large-scale industrial application possible. Moreover, multi-electrodes of monolayer iron oxide-graphene cause no environmental pollution, customization and modification can be conducted according to different treatment wastewater, refitted equipment is also applicable to soil remediation, and the application scope is wide.
Description
Technical field
The present invention relates to technical field of sewage, especially relate to a kind of electro-catalysis water treatment facilities based on mono-layer oxidized iron-graphite alkene and method.
Background technology
The activity of the mankind can make substantial amounts of industry, agricultural and domestic refuse enter in water, making water be contaminated, at present, the whole world there are about the sewage of billion cubic meter more than 4200 every year and enters rivers,lakes and seas, polluting the fresh water of 5.5 tcms, this is equivalent to more than the 14% of whole world runoff volume.
The general dyeing waste water that processes uses the methods such as high-temperature oxydation, coagulation air-float, activated sludge and electrochemistry, wherein electrochemical method the most preferably meets the requirement of " clean method ", electrochemical techniques are as a kind of means developed rapidly, day by day showing the superiority of uniqueness in the work of environment purification, electrochemical treatment of wastewater is typically without a lot of chemical drugss, and post processing is simple, floor space is little, convenient management, sludge quantity is little, therefore is referred to as cleaning facture.
Electro-catalysis negative electrode mainly uses metal electrode, such as silver, copper, ferrum at present；The most therefore it is widely used with metallic iron electrode the most again.But, ferrum or other metal electrodes are the most oxidized, can adhere to layer of metal oxide skin(coating) on surface, so that treatment effeciency is greatly reduced, cannot remove pollutant the most completely.
In order to solve the problems referred to above; patent CN103241796A and CN203513401U use grapheme material combine metal-oxide and carry out light electrolysis; although improve adsorption effect; but the method can not realize in a large number, low cost prepares the demand of high-quality Graphene; needing large-scale industrial production to bring a difficult problem for large area scrubbing, additionally positive effect is not played in the protection to cathodic metal yet；Although patent CN102070230A also uses three-diemsnional electrode sewage oxidation treatment, solve the problem that electrolytic iron is oxidizable, but owing to using iron plate as sacrificial anode, required voltage 5-20V, energy consumption is the highest, and is only capable of electrolysis 30cm2Sewage, and change and installation be required for professional and technical personnel, it is impossible to meet enterprise repacking and customization demand.
Summary of the invention
It is an object of the invention to provide a kind of to solve the problems referred to above and can either process waste water and the nano-coating material of target selection modification according to different, the low energy consumption sewage water treatment method of the metal electrode inactivation that can solve the problem that again, the metal-oxide that metal electrode should be made to inactivate is made to become the nano coating with catalysis activity in preparation process, obtain efficient pollutant removal, the method key point is to synthesize mono-layer oxidized ferrum, and the technique making mono-layer oxidized iron electrode, large-scale industrial application is made to be possibly realized, moreover, the multidimension electrode of mono-layer oxidized iron-graphite alkene to environment without any pollution, customizable and modified for different process waste water, the equipment of repacking version is equally applicable to soil remediation, have wide range of applications.
The present invention is achieved through the following technical solutions above-mentioned purpose, the method for treating water based on Graphene of the present invention, it is characterised in that
Sewage disposal is carried out including a reactor assembly,
Described reactor assembly includes a reactor, a cover plate, n removable plate (n is the integer more than 3), a water inlet pipe, an outlet pipe, a filter element, control box and a DC source.
The reactor polyethylene board of described reactor assembly is made, and has a constant volume, and built with filler, described cover plate is positioned on reactor, is arranged symmetrically with micropressure sensor at cover plate and reactor link position.
Removable plate is equidistantly laid on the slot of cover plate, removable plate is built with metal oxide electrode (mono-layer oxidized iron electrode) product, may move and between plate and cover plate with DC source, use wired electrical connection, graphite electrode is close on the wall of reactor both sides respectively, is connected with DC source electric wire.
Reactor two ends connect an outlet pipe and water inlet pipe respectively, described filter element is between outlet pipe and reactor, described control box controls switch and the switch of DC source of water intaking valve, and survey water yield data are uploaded to computer, computer is according to inflow, conduction time and scavenging effect printed report.
Described filter element is by porous aggregate and is wrapped in rove thereon and forms, containing one or more in polyphenylene sulfide fibre, polyester fiber, polypropylene fibre, Fypro, cotton fiber in rove,
Dischargeable capacity is 10L, and filler uses ZK30 active carbon filler.
Described micropressure sensor is four, it is evenly arranged in reactor edge, control box Real-time Collection pressure sensor signal, and it is transferred to computer, computer judges the behaviour in service of metal oxide electrode according to institute's measuring pressure, when the weight of metal oxide electrode varies more than preset value, controlling box and send early warning information, prompting user changes the nanometer synthesis of metal oxide electrode product in removable plate.
Direct current power source voltage is 1 ~ 2 volt.
Described metal oxide electrode is mono-layer oxidized iron electrode.
A kind of preparation method based on Graphene synthesis single metal oxide, it is characterised in that: include pretreatment, synthesize mono-layer oxidized ferrum, make mono-layer oxidized iron electrode.
Pretreatment includes alkali cleaning, sandblasting and etch step；
1.1st step alkali cleaning: in order to remove the oil stain on iron plate surface, puts into the 5%Na of boiling by the iron plate after rolling polishing2CO3In solution, keep 1h, in 80 ° of C plasma cleaners, after taking-up, clean 5min；
1.2nd step sandblasting: remove the oxide-film on surface, expose metal surface, and make surface coarsening, improves surface area, corundum granularity be 120-150 μm, air pressure be 3.5 × 105Under conditions of Pa, pure iron plate smooth for surface cleaning is carried out blasting treatment, clean with substantial amounts of tap water after sandblasting, then clean with deionized water, to remove sand grains and the metal fillings of remained on surface；
1.3rd etching step: in order to obtain uniform etch pit, iron plate is put in 10% oxalic acid solution and perform etching, keep 2h at 95 ° of C, put into after taking-up in 80 ° of C plasma cleaners and clean 10 minutes, dry.
Synthesize mono-layer oxidized ferrum step to include:
2.1st step synthesizes mono-layer oxidized iron-graphite alkene GRC12: slowly will aoxidize under conditions of controlling acid-base value containing lauric ferrous iron solution, and the mono-layer oxidized iron-graphite alkene GRC12 obtained uses alcohol washes postlyophilization under the conditions of control oxygen；
2.2nd step aoxidizes mono-layer oxidized iron-graphite alkene GRC12: exposed in space by dried mono-layer oxidized iron-graphite alkene GRC12, appropriateness oxidation；
Mono-layer oxidized iron-graphite alkene GRC12 after 2.3rd step layering oxidation obtains mono-layer oxidized ferrum: be dispersed in NaOH solution by the mono-layer oxidized iron-graphite alkene GRC12 after oxidation, the suspension obtained, after alcoholic solution cleans up, i.e. can get mono-layer oxidized ferrous solution.
Make mono-layer oxidized iron electrode step to include:
3.1st step two-dimensional electrode makes: first indium-tin oxide electrode soaks fully at PDDA, and clear water soaks at mono-layer oxidized ferrous solution after rinsing, and i.e. can get one layer of iron oxide electrode；Repeat above step, i.e. can get multilayer oxygen iron electrode；
3.2nd step multidimension electrode makes: load working electrode between traditional two-dimentional electrolysis electrode, forms multidimension electrode structure, and the method for coating of working electrode uses method described in the 2.1st step；
3.3rd step mono-layer oxidized iron-graphite alkene electrode multidimension electrode makes: utilize combined method layer by layer, mono-layer oxidized ferrum and Graphene on degree alternately, uses method described in the 2.1st step.
The beneficial effects of the present invention is: using the supply as electro-catalysis negative electrode of the mono-layer oxidized iron electrode, metal-oxide owing to making metal electrode inactivate becomes the nano coating with catalysis activity, obtain efficient pollutant removal, be conducive to enterprise's scrubbing on a large scale, additionally, owing to using the change of the weight of micropressure sensor measurement electrode, make installation, run and safeguard simple, without professional, reduce the phenomenon being detained for a long time owing to changing composite electrode product the most in time, optimization processing scheme can be provided for different process waste water, applied widely；Additionally there are the existence controlling box, when supply voltage exception, energy and alarm, prevent the excessive voltage damage to electrode；Additionally, the equipment of repacking version is equally applicable to soil remediation, have wide range of applications.
Accompanying drawing explanation
Fig. 1 is the system structure schematic diagram of the present invention.
1. reactor；2. water inlet pipe；3. DC source；4. may move plate；The most mono-layer oxidized iron electrode；6. cover plate；7. control box；8. computer；9. filter element；10. outlet pipe；11. micropressure sensors；12. water intaking valves.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
Sewage disposal is carried out including a reactor assembly,
Described reactor assembly includes that reactor 1, cover plate 6, n removable plate 4(n is the integer more than 3), water inlet pipe 2, outlet pipe 10, filter element 9, control box 7 and a DC source 3.
The reactor 1 of described reactor assembly is made with polyethylene board, has a constant volume, and built with filler, described cover plate 6 is positioned on reactor 1, is arranged symmetrically with micropressure sensor 11 at cover plate 6 and reactor 1 link position.
Removable plate 4 is equidistantly laid on the slot of cover plate 6, removable plate 4 is built with the mono-layer oxidized iron electrode of metal oxide electrode 5() product, may move and between plate 4 and cover plate 6 with DC source 3, use wired electrical connection, graphite electrode is close on the wall of reactor both sides respectively, is connected with DC source 3 electric wire.
Reactor 1 two ends connect an outlet pipe 10 and water inlet pipe 2 respectively, described filter element 9 is between outlet pipe 10 and reactor 1, described control box 7 controls switch and the switch of DC source 3 of water intaking valve 2, and survey water yield data are uploaded to computer 8, computer 8 is according to inflow, conduction time and scavenging effect printed report.
Described filter element 9 is by porous aggregate and is wrapped in rove thereon and forms, containing one or more in polyphenylene sulfide fibre, polyester fiber, polypropylene fibre, Fypro, cotton fiber in rove.
Dischargeable capacity is 10L, and filler uses ZK30 active carbon filler.
Described micropressure sensor 11 is four, it is evenly arranged in reactor 1 edge, control box 7 Real-time Collection pressure sensor signal, and it is transferred to computer 8, computer 8 judges the behaviour in service of metal oxide electrode according to institute's measuring pressure, when the weight of metal oxide electrode 5 varies more than preset value, controlling box 7 and send early warning information, prompting user changes nanometer synthesis of metal oxide electrode 5 product in removable plate 4.
DC source 3 voltage is 1 ~ 2 volt.
Described metal oxide electrode is mono-layer oxidized iron electrode.
A kind of preparation method based on Graphene synthesis single metal oxide, it is characterised in that: include pretreatment, synthesize mono-layer oxidized ferrum, make mono-layer oxidized iron electrode.
Pretreatment includes alkali cleaning, sandblasting and etch step；
1.1st step alkali cleaning: in order to remove the oil stain on iron plate surface, puts into the 5%Na of boiling by the iron plate after rolling polishing2CO3In solution, keep 1h, in 80 ° of C plasma cleaners, after taking-up, clean 5min；
1.2nd step sandblasting: remove the oxide-film on surface, expose metal surface, and make surface coarsening, improves surface area, corundum granularity be 120-150 μm, air pressure be 3.5 × 105Under conditions of Pa, pure iron plate smooth for surface cleaning is carried out blasting treatment, clean with substantial amounts of tap water after sandblasting, then clean with deionized water, to remove sand grains and the metal fillings of remained on surface；
1.3rd etching step: in order to obtain uniform etch pit, iron plate is put in 10% oxalic acid solution and perform etching, keep 2h at 95 ° of C, put into after taking-up in 80 ° of C plasma cleaners and clean 10 minutes, dry.
Synthesize mono-layer oxidized ferrum step to include:
2.1st step synthesis GRC12: slowly will aoxidize under conditions of controlling acid-base value containing lauric ferrous iron solution, the GRC12 obtained uses alcohol washes postlyophilization under the conditions of control oxygen；
2.2nd step oxidation GRC12: dried GRC12 is exposed in space, appropriateness oxidation；
GRC12 after 2.3rd step layering oxidation obtains mono-layer oxidized ferrum: be dispersed in NaOH solution by the GRC12 after oxidation. and the suspension obtained, after alcoholic solution cleans up, i.e. can get mono-layer oxidized ferrous solution.
Make mono-layer oxidized iron electrode step to include:
3.1st step two-dimensional electrode makes: first indium-tin oxide electrode soaks fully at PDDA, and clear water soaks at mono-layer oxidized ferrous solution after rinsing, and i.e. can get one layer of iron oxide electrode；Repeat above step, i.e. can get multilayer oxygen iron electrode；
3.2nd step multidimension electrode makes: load working electrode between traditional two-dimentional electrolysis electrode, forms multidimension electrode structure, and the method for coating of working electrode uses method described in the 2.1st step；
3.3rd step mono-layer oxidized iron-graphite alkene electrode multidimension electrode makes: utilize combined method layer by layer, mono-layer oxidized ferrum and Graphene on degree alternately, uses method described in the 2.1st step.
The present invention is to be improved prior art, and historical facts or anecdotes has used for reference prior art during executing, and as space is limited, is not described in detail prior art part；The NM technology segment of every present invention, all can use prior art to realize.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (7)
1. a water treatment facilities based on Graphene, it is characterised in that
Sewage disposal is carried out including a reactor assembly,
Described reactor assembly includes a reactor, a cover plate, n removable plate (n is the integer more than 3), a water inlet pipe, an outlet pipe, a filter element, micropressure sensor, control box and a DC source,
The reactor polyethylene board of described reactor assembly is made, and has a constant volume, and built with filler, described cover plate is positioned on reactor, is arranged symmetrically with micropressure sensor at cover plate and reactor link position,
Removable plate is equidistantly laid on the slot of cover plate, removable plate, built with nanometer synthesis of metal oxide electrode product, may move and uses wired electrical connection between plate and cover plate with DC source, and graphite electrode is close on the wall of reactor both sides respectively, it is connected with DC source electric wire
Reactor two ends connect an outlet pipe and water inlet pipe respectively, described filter element is between outlet pipe and reactor, described control box controls switch and the switch of DC source of water intaking valve, and survey water yield data are uploaded to computer, computer is according to inflow, conduction time and scavenging effect printed report.
Water treatment facilities based on Graphene the most according to claim 1, it is characterised in that
Described metal oxide electrode is mono-layer oxidized iron electrode；Described filter element is by porous aggregate and is wrapped in rove thereon and forms, containing one or more in polyphenylene sulfide fibre, polyester fiber, polypropylene fibre, Fypro, cotton fiber in rove.
Water treatment facilities based on Graphene the most according to claim 1, it is characterised in that
Described micropressure sensor is four, it is evenly arranged in reactor edge, control box Real-time Collection pressure sensor signal, and it is transferred to computer, computer judges the behaviour in service of metal oxide electrode according to institute's measuring pressure, when the weight of metal oxide electrode varies more than preset value, controlling box and send early warning information, prompting user changes the nanometer synthesis of metal oxide electrode product in removable plate.
4. the method that the water treatment facilities based on Graphene utilized described in any one of claim 1-3 carries out water process, it is characterised in that
Described nanometer synthesis of metal oxide electrode product is to obtain single metal oxide based on Graphene synthesis, including pretreatment, synthesizes mono-layer oxidized ferrum and makes mono-layer oxidized iron electrode.
Method the most according to claim 4, it is characterised in that
Pretreatment includes alkali cleaning, sandblasting and etch step；
1.1st step alkali cleaning: in order to remove the oil stain on iron plate surface, puts into the 5%Na of boiling by the iron plate after rolling polishing2CO3In solution, keep 1h, in 80 ° of C plasma cleaners, after taking-up, clean 5min；
1.2nd step sandblasting: remove the oxide-film on surface, expose metal surface, and make surface coarsening, improves surface area, corundum granularity be 120-150 μm, air pressure be 3.5 × 105Under conditions of Pa, pure iron plate smooth for surface cleaning is carried out blasting treatment, clean with substantial amounts of tap water after sandblasting, then clean with deionized water, to remove sand grains and the metal fillings of remained on surface；
1.3rd etching step: in order to obtain uniform etch pit, iron plate is put in 10% oxalic acid solution and perform etching, keep 2h at 95 ° of C, put into after taking-up in 80 ° of C plasma cleaners and clean 10 minutes, dry.
Method the most according to claim 4, it is characterised in that synthesize mono-layer oxidized ferrum step and include:
2.1st step synthesizes mono-layer oxidized iron-graphite alkene GRC12: slowly will aoxidize under conditions of controlling acid-base value containing lauric ferrous iron solution, and the mono-layer oxidized iron-graphite alkene GRC12 obtained uses alcohol washes postlyophilization under the conditions of control oxygen；
2.2nd step aoxidizes mono-layer oxidized iron-graphite alkene GRC12: exposed in space by dried GRC12, appropriateness oxidation；
Mono-layer oxidized iron-graphite alkene GRC12 after 2.3rd step layering oxidation obtains mono-layer oxidized ferrum: be dispersed in NaOH solution by the mono-layer oxidized iron-graphite alkene GRC12 after oxidation, the suspension obtained, after alcoholic solution cleans up, i.e. can get mono-layer oxidized ferrous solution.
Method the most according to claim 4, it is characterised in that make mono-layer oxidized iron electrode step and include:
3.1st step two-dimensional electrode makes: first indium-tin oxide electrode soaks fully at PDDA, and clear water soaks at mono-layer oxidized ferrous solution after rinsing, and i.e. can get one layer of iron oxide electrode；Repeat above step, i.e. can get multilayer oxygen iron electrode；
3.2nd step multidimension electrode makes: load working electrode between traditional two-dimentional electrolysis electrode, forms multidimension electrode structure, and the method for coating of working electrode uses method described in the 2.1st step；
3.3rd step mono-layer oxidized iron-graphite alkene electrode multidimension electrode makes: utilize combined method layer by layer, mono-layer oxidized ferrum and Graphene on degree alternately, uses method described in the 2.1st step.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010115904A1 (en) * | 2009-04-06 | 2010-10-14 | Sa Envitech S.R.L. | Graphene based electrodes for electrochemical reactions, and electrooxidation process for the removal of contaminants from liquids using said electrodes |
| CN103078108A (en) * | 2013-01-16 | 2013-05-01 | 上海大学 | Graphene-loaded rhombohedron ferric oxide composite material and hydrothermal synthesis method thereof |
| CN104803339A (en) * | 2015-04-21 | 2015-07-29 | 电子科技大学 | Flexible micro pressure sensor and preparation method thereof |
| CN104973662A (en) * | 2015-06-25 | 2015-10-14 | 青岛双瑞海洋环境工程股份有限公司 | Oxide anode for treatment of ship domestic sewage and preparation method thereof |
| CN105036423A (en) * | 2015-06-25 | 2015-11-11 | 青岛双瑞海洋环境工程股份有限公司 | Electrolytic treatment system of ship domestic sewage |
-
2015
- 2015-10-29 CN CN201510718475.9A patent/CN105836851A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010115904A1 (en) * | 2009-04-06 | 2010-10-14 | Sa Envitech S.R.L. | Graphene based electrodes for electrochemical reactions, and electrooxidation process for the removal of contaminants from liquids using said electrodes |
| CN103078108A (en) * | 2013-01-16 | 2013-05-01 | 上海大学 | Graphene-loaded rhombohedron ferric oxide composite material and hydrothermal synthesis method thereof |
| CN104803339A (en) * | 2015-04-21 | 2015-07-29 | 电子科技大学 | Flexible micro pressure sensor and preparation method thereof |
| CN104973662A (en) * | 2015-06-25 | 2015-10-14 | 青岛双瑞海洋环境工程股份有限公司 | Oxide anode for treatment of ship domestic sewage and preparation method thereof |
| CN105036423A (en) * | 2015-06-25 | 2015-11-11 | 青岛双瑞海洋环境工程股份有限公司 | Electrolytic treatment system of ship domestic sewage |
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Inventor after: Zhang Yulong Inventor after: Shen Yan Inventor before: Huang Lizhi |
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Effective date of registration: 20170504 Address after: 215000 No. 116, Yang Cheng Road, Xiangcheng Economic Development Zone, Jiangsu, Suzhou Applicant after: Zhang Yulong Address before: 307 B, International Building, Wenchang Middle Road, Guangling District, Jiangsu, Yangzhou 225000, China Applicant before: Huang Lizhi |
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Application publication date: 20160810 |