CN111607085A - Organic material, BDI system and removal method for water metal ions - Google Patents
Organic material, BDI system and removal method for water metal ions Download PDFInfo
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- CN111607085A CN111607085A CN202010462170.7A CN202010462170A CN111607085A CN 111607085 A CN111607085 A CN 111607085A CN 202010462170 A CN202010462170 A CN 202010462170A CN 111607085 A CN111607085 A CN 111607085A
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- 229910021645 metal ion Inorganic materials 0.000 title claims abstract description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000011368 organic material Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 22
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 claims abstract description 90
- 150000002500 ions Chemical class 0.000 claims abstract description 28
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 239000013535 sea water Substances 0.000 claims abstract description 16
- 239000002904 solvent Substances 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000000178 monomer Substances 0.000 claims abstract description 9
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 239000011267 electrode slurry Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 10
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 9
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 9
- 229910001415 sodium ion Inorganic materials 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910001424 calcium ion Inorganic materials 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 229910001414 potassium ion Inorganic materials 0.000 claims description 8
- 239000002033 PVDF binder Substances 0.000 claims description 7
- 239000006230 acetylene black Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 6
- 229910052797 bismuth Inorganic materials 0.000 claims description 6
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 6
- 239000006258 conductive agent Substances 0.000 claims description 6
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 5
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 claims description 5
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims description 5
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 claims description 5
- 229910001430 chromium ion Inorganic materials 0.000 claims description 5
- 229910001429 cobalt ion Inorganic materials 0.000 claims description 5
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 claims description 5
- 229910001431 copper ion Inorganic materials 0.000 claims description 5
- 239000002003 electrode paste Substances 0.000 claims description 5
- 229910052753 mercury Inorganic materials 0.000 claims description 5
- 229910001453 nickel ion Inorganic materials 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- ZQNAPBOSLCTZIB-UHFFFAOYSA-N 1,3-dichloroanthracene-9,10-dione Chemical compound C1=CC=C2C(=O)C3=CC(Cl)=CC(Cl)=C3C(=O)C2=C1 ZQNAPBOSLCTZIB-UHFFFAOYSA-N 0.000 claims description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910021607 Silver chloride Inorganic materials 0.000 claims description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 4
- 229940073609 bismuth oxychloride Drugs 0.000 claims description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 4
- 239000002041 carbon nanotube Substances 0.000 claims description 4
- 230000001351 cycling effect Effects 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- BWOROQSFKKODDR-UHFFFAOYSA-N oxobismuth;hydrochloride Chemical compound Cl.[Bi]=O BWOROQSFKKODDR-UHFFFAOYSA-N 0.000 claims description 4
- 239000000376 reactant Substances 0.000 claims description 4
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims description 4
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 4
- MQIUMARJCOGCIM-UHFFFAOYSA-N 1,5-dichloroanthracene-9,10-dione Chemical compound O=C1C2=C(Cl)C=CC=C2C(=O)C2=C1C=CC=C2Cl MQIUMARJCOGCIM-UHFFFAOYSA-N 0.000 claims description 3
- DBCKMJVEAUXWJJ-UHFFFAOYSA-N 2,3-dichlorobenzene-1,4-diol Chemical compound OC1=CC=C(O)C(Cl)=C1Cl DBCKMJVEAUXWJJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003651 drinking water Substances 0.000 claims description 3
- 235000020188 drinking water Nutrition 0.000 claims description 3
- 238000003487 electrochemical reaction Methods 0.000 claims description 3
- GLNWILHOFOBOFD-UHFFFAOYSA-N lithium sulfide Chemical compound [Li+].[Li+].[S-2] GLNWILHOFOBOFD-UHFFFAOYSA-N 0.000 claims description 3
- YYVYAPXYZVYDHN-UHFFFAOYSA-N 9,10-phenanthroquinone Chemical group C1=CC=C2C(=O)C(=O)C3=CC=CC=C3C2=C1 YYVYAPXYZVYDHN-UHFFFAOYSA-N 0.000 claims description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 2
- 229930192627 Naphthoquinone Natural products 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 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
- 125000003277 amino group Chemical group 0.000 claims description 2
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Chemical group CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 claims description 2
- 150000004056 anthraquinones Chemical group 0.000 claims description 2
- 229910000416 bismuth oxide Inorganic materials 0.000 claims description 2
- 239000003575 carbonaceous material Substances 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000000706 filtrate Substances 0.000 claims description 2
- 229910052736 halogen Chemical group 0.000 claims description 2
- 150000002367 halogens Chemical group 0.000 claims description 2
- 239000010842 industrial wastewater Substances 0.000 claims description 2
- 150000002791 naphthoquinones Chemical group 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000010345 tape casting Methods 0.000 claims description 2
- UGNWTBMOAKPKBL-UHFFFAOYSA-N tetrachloro-1,4-benzoquinone Chemical compound ClC1=C(Cl)C(=O)C(Cl)=C(Cl)C1=O UGNWTBMOAKPKBL-UHFFFAOYSA-N 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims 1
- 230000035484 reaction time Effects 0.000 claims 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 9
- 238000010612 desalination reaction Methods 0.000 abstract description 6
- 229920000620 organic polymer Polymers 0.000 abstract description 5
- 239000002861 polymer material Substances 0.000 abstract description 5
- 238000006479 redox reaction Methods 0.000 abstract description 5
- 230000002441 reversible effect Effects 0.000 abstract description 5
- 125000000524 functional group Chemical group 0.000 abstract description 4
- 239000002351 wastewater Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 31
- 229920000642 polymer Polymers 0.000 description 26
- 239000011149 active material Substances 0.000 description 22
- 239000011521 glass Substances 0.000 description 15
- 239000007864 aqueous solution Substances 0.000 description 13
- 238000005303 weighing Methods 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000007772 electrode material Substances 0.000 description 7
- 238000002336 sorption--desorption measurement Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000012429 reaction media Substances 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 150000001450 anions Chemical class 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 3
- 238000007606 doctor blade method Methods 0.000 description 3
- 229940079101 sodium sulfide Drugs 0.000 description 3
- ZGHLCBJZQLNUAZ-UHFFFAOYSA-N sodium sulfide nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Na+].[Na+].[S-2] ZGHLCBJZQLNUAZ-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002848 electrochemical method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229940048181 sodium sulfide nonahydrate Drugs 0.000 description 2
- WMDLZMCDBSJMTM-UHFFFAOYSA-M sodium;sulfanide;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Na+].[SH-] WMDLZMCDBSJMTM-UHFFFAOYSA-M 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000272186 Falco columbarius Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 241000047703 Nonion Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L magnesium chloride Substances [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G75/00—Macromolecular compounds obtained by reactions forming a linkage containing sulfur with or without nitrogen, oxygen, or carbon in the main chain of the macromolecule
- C08G75/02—Polythioethers
- C08G75/0204—Polyarylenethioethers
- C08G75/025—Preparatory processes
- C08G75/0254—Preparatory processes using metal sulfides
-
- 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
-
- 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
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention provides an organic material, a BDI system and a method for removing metal ions in a water body, wherein the preparation method of the metal ion removal organic material comprises the following steps: placing the quinone monomer and the sulfide into a solvent for reaction to obtain the organic material; the organic material is an organic polymer material with redox functional groups, is not limited by non-ionic selection due to a non-rigid structure, can generate reversible electrochemical redox reaction in different metal ion systems, and can be coordinated with metal ions in a solution to form a complex so as to achieve the purpose of removing the metal ions; the organic material is used in an electrochemical cell ion removal (BDI) system, can effectively remove metal ions in a water body, has high removal capacity and can be recycled; the BDI system can be widely applied to the fields of seawater desalination, sewage and wastewater metal ion removal and the like, thereby having wide application prospect.
Description
Technical Field
The invention belongs to the field of electrochemistry, relates to an organic material, a BDI system and a method for removing water body metal ions, in particular to the organic material, a preparation method thereof, the BDI system comprising the organic material and application thereof in removing the water body metal ions; further relates to an organic polymer material, electrode slurry, an electrode plate and an application of the electrochemical metal ion removal system in a seawater and sewage metal ion removal system.
Background
Water is a basic substance on which human beings rely to live, and with the rapid development of economy in China, the problems of shortage of fresh water resources and heavy metal water pollution are gradually highlighted. The method can effectively solve the problems of shortage of fresh water resources and heavy metal water pollution by removing ions from seawater and heavy metal sewage through a proper technical method, and accelerate ecological civilization construction in China and improvement of quality of life of people. The seawater desalination needs to remove metal ions such as sodium ions, magnesium ions, potassium ions, calcium ions and the like in the seawater. The heavy metal pollution of the water body mainly comes from electroplating industry, machining, mining, nonferrous metal smelting and the like, and mainly comprises chromium ions, cobalt ions, nickel ions, copper ions, zinc ions, arsenic ions, lead ions, cadmium ions, mercury ions and the like. The existing seawater desalination technologies (electrodialysis, reverse osmosis, distillation and the like) and heavy metal sewage treatment technologies (adsorption, coprecipitation, biological absorption and the like) have defects in the aspects of cost, energy consumption, secondary pollution, metal ion removal diversity and the like.
The electrochemical metal ion removal technology has the advantages of low energy consumption, high capacity, no secondary pollution of electrons, recyclability and the like, and has good application prospect in the aspect of removing capacitive and bulk phase Faraday electrochemical metal ions. However, the electrochemical method for removing ions by electric double layer capacitance type reported in 1966 has a problem of low metal ion removal capacity due to the limitation of the specific surface area of the electrode material and the pore structure. The battery-type ion removal technology (BDI) proposed in 2012 is based on the bulk phase reaction of faraday electrochemical reaction, and has the advantage of high metal ion removal capacity. However, the inorganic materials currently used in such technologies have the problem of ion removal unity, and are only suitable for removing sodium ions.
Therefore, the electrochemical metal ion removal system which can simultaneously remove a plurality of metal ions and has high removal capacity is provided, and has important application value for removing metal ions in sewage, seawater desalination, drinking water and the like.
Disclosure of Invention
Aiming at the defects of low metal ion removal capacity and ion removal unicity in the prior art, the invention aims to provide an organic material, a BDI system and a method for removing metal ions in a water body, wherein the organic material is an organic polymer material with redox functional groups, can generate reversible electrochemical redox reaction in different metal ion systems due to a non-rigid structure without being limited by non-ion selection, and can be coordinated with metal ions in a solution to form a complex so as to achieve the purpose of removing the metal ions; the BDI system mainly comprises a polymer working electrode for removing metal ions and a counter electrode for removing anions, can be widely applied to the fields of seawater desalination, metal ion removal of sewage and wastewater and the like, and has wide application prospect.
One of the purposes of the invention is to provide a preparation method of a polymer active material for removing metal ions in a water body, and the preparation method of the organic material comprises the following steps: and (3) placing the quinone monomer and the sulfide into a solvent for reaction to obtain the organic material.
The preparation method of the organic material is simple, the raw materials are easy to obtain, the price is low, the realization is easy, and the industrial large-scale production and application are facilitated.
In the present invention, the quinone monomer includes any one or a combination of at least two of naphthoquinone, phenanthrenequinone, anthraquinone, or benzoquinone substituted with amino group and/or halogen.
In the present invention, the quinone monomer includes any one or a combination of at least two of 2, 6-diaminoquinone, 2, 4-dichloroanthraquinone, 1, 5-dichloroanthraquinone, tetrachlorobenzoquinone and dichlorohydroquinone.
In the present invention, the sulfide includes lithium sulfide and/or sodium sulfide.
In the present invention, the solvent includes any one of tetrahydrofuran, N-dimethylformamide, N-methylpyrrolidone, dimethylsulfoxide, or dimethylacetamide, or a combination of at least two thereof.
In the present invention, the mass ratio of the quinone monomer to the sulfide is (0.5-1): 1-3, for example, 0.5:3, 0.6:2.5, 0.7:2, 0.8:1.5, 0.9:1, 1:1, etc.
In the present invention, the reaction temperature is 160-.
In the invention, the preparation method further comprises the steps of separating, cleaning and drying reactants obtained after the reaction in sequence.
In the invention, the separation comprises filtering the reactant obtained after the reaction, and removing the filtrate to obtain solid precipitate.
In the present invention, the washing includes washing with a mixture of water and ethanol.
The second object of the present invention is to provide an organic material prepared by the preparation method according to the first object.
The organic material obtained by the invention is an organic polymer material with redox functional groups, and due to the non-rigid structure, the organic material is not limited by non-ionic selection, reversible electrochemical redox reaction can be generated in different metal ion systems, and the organic material can be coordinated with metal ions in a solution to form a complex, so that the aim of removing the metal ions is fulfilled.
In the present invention, the active material is a porous structure having a pore size of 2 to 40nm (e.g., 2nm, 5nm, 10nm, 15nm, 20nm, 25nm, 30nm, 35nm, 40nm, etc.), and having a pore volume of 0.1 to 0.15cm3/g。
The active material is of a porous structure, can realize rapid hydrated ion transmission, has a large specific surface area, and is beneficial to solution infiltration.
In the present invention, the number average molecular weight of the organic material is 5 to 10 ten thousand, for example, 5 ten thousand, 6 ten thousand, 7 ten thousand, 8 ten thousand, 9 ten thousand, 10 ten thousand, or the like.
In the present invention, the content of sulfur in the organic material is 10 to 16 wt%, for example, 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt%, 16 wt%, etc.
It is a third object of the present invention to provide an electrode paste comprising the organic material of the second object.
In the present invention, the active paste further includes a conductive agent, a binder, and a solvent.
In the present invention, the conductive agent includes acetylene black and/or carbon nanotubes.
In the invention, the binder is polyvinylidene fluoride and/or polytetrafluoroethylene.
In the present invention, the solvent is ethanol and/or N-methylpyrrolidone.
In the present invention, the preparation method of the electrode slurry comprises: and dissolving the organic material, the conductive agent and the binder in a solvent, and mixing to obtain the electrode slurry.
In the present invention, the mixing is performed under stirring conditions.
In the present invention, the mixing rate is 300-800rpm (e.g., 300rpm, 350rpm, 400rpm, 450rpm, 500rpm, 550rpm, 600rpm, 650rpm, 700rpm, 750rpm, 800rpm, etc.), and the mixing time is 1-5h (e.g., 1h, 1.5h, 2h, 2.5h, 3h, 3.5h, 4h, 4.5h, 5h, etc.).
The fourth object of the present invention is to provide an electrode sheet comprising a current collector and an electrode slurry layer provided on the surface of the current collector, wherein the electrode slurry layer is the electrode slurry of the third object.
In the present invention, the current collector includes any one of stainless steel, carbon cloth, or carbon paper.
In the present invention, the thickness of the electrode paste layer is 0.5 to 1.5. mu.m, for example, 0.5. mu.m, 0.6. mu.m, 0.7. mu.m, 0.8. mu.m, 0.9. mu.m, 1. mu.m, 1.1. mu.m, 1.2. mu.m, 1.3. mu.m, 1.4. mu.m, 1.5. mu.m, etc.
In the preparation method of the electrode plate, the electrode slurry is coated on the surface of a current collector and solidified to obtain the electrode plate.
In the invention, the coating mode is knife coating.
In the present invention, the curing temperature is 60 to 100 ℃ (e.g., 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃, 85 ℃, 90 ℃, 95 ℃, 100 ℃ and the like), and the curing time is 8 to 12 hours (e.g., 8 hours, 8.5 hours, 9 hours, 9.5 hours, 10 hours, 10.5 hours, 11 hours, 11.5 hours, 12 hours and the like).
The fifth purpose of the present invention is to provide a BDI system, which comprises a working electrode and a counter electrode, wherein the working electrode is the electrode sheet described in the fourth purpose, and the counter electrode is selected from any one or a combination of at least two of a carbon-based material, a bismuth-based material, a silver-based material, and an aluminum-based material.
Preferably, the counter electrode and the reference electrode are respectively and independently selected from any one or a combination of at least two of activated carbon, mesoporous carbon, carbon nanotubes, bismuth oxychloride, elemental bismuth, bismuth oxide or silver chloride.
In the invention, the working electrode of the BDI system is used for removing metal ions in the aqueous solution, and the counter electrode is used for removing anions in the aqueous solution.
The BDI system comprises organic materials, the organic materials can generate reversible electrochemical redox reaction in different metal ion systems, and can be coordinated with metal ions in a solution to form a complex, so that the aim of removing the metal ions is fulfilled, the BDI system has high removal capacity, and the BDI system can be recycled.
In the present invention, the metal ions include any one or a combination of at least two of sodium ions, magnesium ions, potassium ions, calcium ions, chromium ions, cobalt ions, nickel ions, copper ions, zinc ions, arsenic ions, lead ions, cadmium ions, or mercury ions.
The sixth purpose of the present invention is to provide an electrochemical metal ion removal system, which comprises the BDI system described in the fifth purpose.
The seventh purpose of the present invention is to provide an application of the electrochemical metal ion removal system described in the sixth purpose in removing metal ions in a water body.
In the present invention, the metal ions include any one or a combination of at least two of sodium ions, magnesium ions, potassium ions, calcium ions, chromium ions, cobalt ions, nickel ions, copper ions, zinc ions, arsenic ions, lead ions, cadmium ions, or mercury ions.
In the present invention, the water body includes any one of river water, sea water, drinking water or industrial wastewater.
In the present invention, the application includes: the method comprises the steps of removing target ions in a water body through a BDI system, calculating the removal capacity of metal ions according to the concentration of the metal ions in the water body or charge transfer in an electrochemical reaction process, and adjusting the arrangement of a working electrode and a counter electrode in the BDI system through the removal capacity of the metal ions, so that the metal ions in the water body are removed.
Preferably, the concentration of metal ions in the body of water is 50-50000ppm, such as 50ppm, 1000ppm, 3000ppm, 5000ppm, 8000ppm, 10000ppm, 20000ppm, 30000ppm, 40000ppm, 50000ppm and the like.
The concentration of the metal ions in the present invention refers to the total concentration of the metal ions in the water body.
Preferably, the BDI system has an operating voltage of-3 to 3V (such as-3V, -2V, -1V, 0V, 1V, 2V, 3V and the like) and an operating current density of 20 to 2000mA/g (such as 20mA/g, 50mA/g, 100mA/g, 300mA/g, 500mA/g, 800mA/g, 1000mA/g, 1200mA/g, 1500mA/g, 1800mA/g, 2000mA/g and the like).
In the present invention, the mass ratio of the working electrode to the counter electrode in the BDI system is (1-0.5): 1-2, such as 1:1, 0.9:1.2, 0.8:1.4, 0.7:1.6, 0.6:1.8, 0.5:2, etc.
Compared with the prior art, the invention has the following beneficial effects:
the organic material is an organic polymer material with redox functional groups, is not limited by non-ionic selection due to a non-rigid structure, can generate reversible electrochemical redox reaction in different metal ion systems, and can be coordinated with metal ions in a solution to form a complex so as to achieve the purpose of removing the metal ions; the organic material is used in an electrochemical metal ion removal system, can effectively remove metal ions in a water source, has high removal capacity (the removal capacity of the metal ions can reach 120mg/g for the total concentration of the metal ions in a water body of 50-50000 ppm), and can be recycled; the BDI system mainly comprises a polymer working electrode for removing metal ions and a counter electrode for removing anions, and can be widely applied to the fields of seawater desalination, metal ion removal of sewage and wastewater and the like, so that the BDI system has a wide application prospect.
Drawings
FIG. 1 is a scanning electron microscope photograph of the polymeric quinone-based active material obtained in example 1, with a scale of 1 μm;
FIG. 2 shows the polymeric quinone active material N obtained in example 12Adsorption-desorption curve chart;
fig. 3 is an electrochemical cycling test chart of the electrochemical metal ion removal system for removing metal ions in an aqueous solution in example 1.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
This example provides a method for preparing a polymeric quinone active material, comprising: weighing 2, 4-dichloroanthraquinone and sodium sulfide in a molar ratio of 1:1 in a glove box, and adding the weighed materials into a 100mL glass container; and then adding 30mL of reaction medium solvent dimethylformamide, reacting at 200 ℃ for 6h, cooling to room temperature, filtering the product, washing with deionized water and ethanol to colorless, and drying to obtain the polymer quinone material.
Fig. 1 is a scanning electron microscope (zeiss merlin) of the polymeric quinone active material obtained in this example, and it can be seen from fig. 1 that the polymeric quinone active material has a porous structure.
Fig. 2 is a graph showing nitrogen adsorption-desorption curves of the polymeric quinone active material obtained in this example, and it can be seen from fig. 2 that the polymeric quinone active material has a porous structure.
The embodiment provides a preparation method of an electrode plate, which comprises the following steps:
a1, taking the polymer quinone material prepared by the above steps as an electrode active material, and mixing the polymer quinone material with the electrode active material according to the mass ratio of 5:3:2, weighing polymer quinone materials, acetylene black and polyvinylidene fluoride, grinding in air for 20min, and adding into a glass container; then adding 2mL of N-methyl pyrrolidone into a glass container, and stirring for 3h at the stirring speed of 500rpm to prepare electrode slurry;
a2, coating the electrode slurry on carbon paper by a doctor blade coating method, drying at 80 ℃ for 10h to obtain an electrode sheet, and cutting the electrode sheet into a proper size for use.
The embodiment provides a BDI system, which includes a working electrode and a counter electrode, wherein the working electrode is the electrode slice obtained above, and the counter electrode is made of mesoporous carbon of 40 nm.
The embodiment provides an electrochemical metal ion removal system, which comprises a circulation test device and a BDI system, and is used for removing metal ions in a water body, and the electrochemical metal ion removal system comprises the following steps:
(1) the BDI system is used for confirming the electrochemical ion removal condition of the aqueous solution of the metal ions under the action of the test voltage of the circulating test equipment, and the concentration of the metal ions in the aqueous solution is between 50 and 50000 ppm. The ion removal voltage range is-3 to 3V, and the current density is 20 to 2000mAg-1The water solution comprises 0.5M NaCl solution, 0.5M KCl solution and 0.5M MgCl2Solution, 0.5M CaCl2The solution, the mixed chloride solution and Shenzhen bay seawater;
(2) based on the step (1), selecting 40nm mesoporous carbon as a counter electrode, selecting a working electrode and a counter motor in a mass ratio of 1:1 through ion removal capacity calculation, assembling a BDI system, and removing metal ions in a water body solution; the BDI system working conditions are as follows: the voltage range is-3V to 3V, and the current density is 20mA/g to 2000 mA/g.
Fig. 3 is an electrochemical cycling test chart of the electrochemical metal ion removal system for removing metal ions in a water solution in this embodiment, and it can be seen from fig. 3 that the system has higher specific capacity and good cycling stability for different solutions. Wherein the specific capacity is between 30 and 120mAh/g after 50 cycles.
ICP testing is carried out on the water body solution before and after the electrochemical metal ion removal system is processed, and the seawater testing result shows that the total removal capacity of the system for sodium ions, potassium ions, calcium ions and magnesium ions is about 78 mg/g.
Example 2
This example provides a method for preparing a polymeric quinone active material, comprising: weighing 2, 4-dichloroanthraquinone and sodium sulfide nonahydrate in a molar ratio of 1:1 in a glove box, and adding into a 100mL glass container; and then adding 30mL reaction medium solvent dimethylformamide, reacting at 230 ℃ for 4h, cooling to room temperature, filtering the product, washing with deionized water and ethanol to colorless, and drying to obtain the polymer quinone material.
Scanning electron microscope tests and nitrogen adsorption-desorption tests were performed on the polymer quinone active material obtained in this example, and it can be seen that the polymer quinone active material obtained in this example has a porous structure.
The embodiment provides a preparation method of an electrode plate, which comprises the following steps:
a1, taking the polymer quinone material prepared by the method as the electrode activity 5:3:2, weighing polymer quinone materials, acetylene black and polyvinylidene fluoride, grinding in air for 10min, and adding into a glass container; then adding 2mL of N-methyl pyrrolidone into a glass container, and stirring for 1h at the stirring speed of 800rpm to prepare electrode slurry;
a2, coating the electrode slurry on carbon paper by a scraper coating method, drying for 8 hours at 100 ℃ to obtain an electrode sheet, and cutting the electrode sheet into a proper size for use.
This embodiment provides a BDI system, wherein a working electrode and a counter electrode are placed on an electrode sheet placement component, the working electrode is the electrode sheet obtained as described above, and the counter electrode is bismuth simple substance.
The embodiment provides an electrochemical metal ion removal system, which comprises a circulation system and a BDI system, and is used for removing metal ions in a water source, and the electrochemical metal ion removal system comprises the following steps:
(1) the BDI system is used for confirming the electrochemical ion removal condition of the aqueous solution of the metal ions under the action of the test voltage of the circulating test equipment, and the concentration of the metal ions in the aqueous solution is between 50 and 50000 ppm. The ion removal voltage range is-3V to 3V, the current density is 20mA/g to 2000mA/g, and the water body solution comprises sewage;
(2) based on the step (1), selecting a bismuth simple substance as a counter electrode, selecting a working electrode and the counter electrode in a mass ratio of 1:1 through ion removal capacity, assembling a BDI system, and removing metal ions in a water body solution; the BDI system working conditions are as follows: the voltage range is-3V to 3V, and the current density is 20mA/g to 2000 mA/g.
ICP tests are carried out on the water body solution before and after the electrochemical metal ion removal system is treated, and the comparison shows that the metal ion removal capacity in the sewage is about 80mg/g, which shows that the electrochemical metal ion removal system of the embodiment can well remove metal ions in the water body solution.
Example 3
This example provides a method for preparing a polymeric quinone active material, comprising: weighing 1, 5-dichloroanthraquinone and sodium sulfide nonahydrate in a molar ratio of 1:3 in a glove box, and adding the weighed materials into a 100mL glass container; and then adding 30mL of reaction medium solvent dimethylformamide, reacting at 180 ℃ for 8h, cooling to room temperature, filtering the product, washing with deionized water and ethanol to colorless, and drying to obtain the polymer quinone material.
Scanning electron microscope tests and nitrogen adsorption-desorption tests were performed on the polymer quinone active material obtained in this example, and it can be seen that the polymer quinone active material obtained in this example has a porous structure.
The embodiment provides a preparation method of an electrode plate, which comprises the following steps:
a1, taking the prepared polymer quinone material as an electrode active material, weighing the polymer quinone material, acetylene black and polyvinylidene fluoride according to the ratio of 6:3:1, grinding the mixture in air for 30min, and adding the ground mixture into a glass container; then adding 3mL of N-methyl pyrrolidone into a glass container, and stirring for 5h at the stirring speed of 300rpm to prepare electrode slurry;
a2, coating the electrode slurry on carbon paper by a doctor blade coating method, drying at 60 ℃ for 12h to obtain an electrode sheet, and cutting the electrode sheet into a proper size for use.
This embodiment provides a BDI system, in which a working electrode and a counter electrode are placed on an electrode sheet placement component, the working electrode is the electrode sheet obtained as described above, and bismuth oxychloride is used as the counter electrode.
The embodiment provides an electrochemical metal ion removal system, which comprises a cycle test device and a BDI system, and is used for removing metal ions in a water source, and comprises the following steps:
(1) under the action of a test voltage of a circulating test device, the BDI system is used for confirming the electrochemical ion removal condition of the aqueous solution of the metal ions, and the concentration of the metal ions in the aqueous solution is between 100 and 50000 ppm. The ion removal voltage range is-3V to 3V, the current density is 20mA/g to 2000mA/g, and the water body solution comprises brackish water;
(2) based on the step (1), selecting bismuth oxychloride as a counter electrode and a reference electrode, selecting a working electrode and the counter electrode with the mass ratio of 1:1 through ion removal capacity calculation, assembling a BDI system, and removing metal ions in a water body solution; the BDI system working conditions are as follows: the voltage range is-3V to 3V, and the current density is 20mA/g to 2000 mA/g.
ICP testing is carried out on the water body solution before and after the electrochemical metal ion removal system is processed, and according to the results of the bitter salt water testing, the total removal capacity of the system for sodium ions, potassium ions, calcium ions and magnesium ions is about 75mg/g, and the electrochemical metal ion removal system can well remove metal ions in the water body solution.
Example 4
This example provides a method for preparing a polymeric quinone active material, comprising: weighing 2, 6-diaminoquinone and lithium sulfide in a molar ratio of 0.5:1 in a glove box, and adding into a 100mL glass container; and then adding 30mL of reaction medium solvent dimethylformamide, reacting at 160 ℃ for 10h, cooling to room temperature, filtering the product, washing with deionized water and ethanol to colorless, and drying to obtain the polymer quinone material.
Scanning electron microscope tests and nitrogen adsorption-desorption tests were performed on the polymer quinone active material obtained in this example, and it can be seen that the polymer quinone active material obtained in this example has a porous structure.
The embodiment provides a preparation method of an electrode plate, which comprises the following steps:
a1, taking the polymer quinone material prepared by the method as an electrode active material, and preparing the electrode active material according to the proportion of 6:3:1, weighing polymer quinone materials, acetylene black and polyvinylidene fluoride, grinding in air for 30min, and adding into a glass container; then adding 2mL of N-methyl pyrrolidone into a glass container, and stirring for 1h at the stirring speed of 800rpm to prepare electrode slurry;
a2, coating the electrode slurry on carbon paper by a scraper coating method, drying for 8 hours at 100 ℃ to obtain an electrode sheet, and cutting the electrode sheet into a proper size for use.
This embodiment provides a BDI system, wherein a working electrode and a counter electrode are placed on an electrode sheet placement unit, the working electrode is the electrode sheet obtained as described above, and the counter electrode is silver chloride.
The embodiment provides an electrochemical metal ion removal system, which comprises a cycle test device and a BDI system, and is used for removing metal ions in a water source, and comprises the following steps:
(1) under the action of a test voltage of a circulating test device, the BDI system is used for confirming the electrochemical ion removal condition of the aqueous solution of the metal ions, and the concentration of the metal ions in the aqueous solution is between 100 and 40000 ppm. Removing the voltage relative to a reference electrode by a cationic electrochemical method, wherein the range is-3V to 3V, the current density is 20mA/g to 2000mA/g, and the water body solution comprises seawater;
(2) selecting silver chloride as a counter electrode based on the step (1), selecting a working electrode and the counter electrode according to the mass ratio of 0.5:2 by ion removal capacity calculation, assembling a BDI system, and removing metal ions in a water body solution; the BDI system working conditions are as follows: the voltage range is-3V to 3V, and the current density is 20mA/g to 2000 mA/g.
ICP testing is carried out on the water body solution before and after the electrochemical metal ion removal system is processed, and the seawater testing result shows that the removal capacity of the system for typical metal magnesium ions in seawater is about 120 mg/g.
Example 5
This example provides a method for preparing a polymeric quinone active material, comprising: weighing dichlorohydroquinone and sodium sulfide in a glove box according to a molar ratio of 0.8:2, and adding into a 100mL glass container; and then adding 30mL reaction medium solvent dimethylformamide, reacting for 3h at 250 ℃, cooling to room temperature, filtering the product, washing with deionized water and ethanol to colorless, and drying to obtain the polymer quinone material.
The polymer quinone active material obtained in this example was subjected to scanning electron microscopy and N2The adsorption-desorption test shows that the polymeric quinone active material obtained in this example has a porous structure.
The embodiment provides a preparation method of an electrode plate, which comprises the following steps:
a1, taking the prepared polymer quinone material as an electrode active material, weighing the polymer quinone material, acetylene black and polyvinylidene fluoride according to the ratio of 5:3:2, grinding in air for 30min, and adding into a glass container; then adding 2mL of N-methyl pyrrolidone into a glass container, and stirring for 2h at the stirring speed of 600rpm to prepare electrode slurry;
a2, coating the electrode slurry on carbon paper by a doctor blade coating method, drying at 60 ℃ for 10h to obtain an electrode sheet, and cutting the electrode sheet into a proper size for use.
The present embodiment provides a BDI system, in which a working electrode and a counter electrode are placed on an electrode sheet placement unit, the working electrode is the electrode sheet obtained as described above, and the counter electrode is activated carbon.
The embodiment provides an electrochemical metal ion removal system, which comprises a cycle test device and a BDI system, and is used for removing metal ions in a water source, and comprises the following steps:
(1) the BDI system is used for confirming the electrochemical ion removal conditions of the aqueous solution of the metal ions, and the concentration of the metal ions in the aqueous solution is between 100 and 40000 ppm. The ion removal voltage range is-3V to 3V, the current density is 20mA/g to 2000mA/g, and the water body solution comprises river water;
(2) based on the step (1), selecting activated carbon as a counter electrode, selecting a working electrode and the counter electrode in a mass ratio of 1:2 through ion removal capacity calculation, assembling a BDI system, and removing metal ions in a water body solution; the BDI system working conditions are as follows: the voltage range is-3V to 3V, and the current density is 20mA/g to 2000 mA/g.
ICP testing is carried out on the water body solution before and after the electrochemical metal ion removal system is processed, wherein according to river water testing results, the total removal capacity of the system for sodium ions, potassium ions, calcium ions and magnesium ions is about 80mg/g, and the electrochemical metal ion removal system can well remove metal ions in the water body solution.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. A method for preparing an organic material, comprising: and (3) placing the quinone monomer and the sulfide into a solvent for reaction to obtain the organic material.
2. The method according to claim 1, wherein the quinone monomer comprises any one or a combination of at least two of naphthoquinone, phenanthrenequinone, anthraquinone, or benzoquinone substituted with amino group and/or halogen;
preferably, the quinone monomer comprises any one or a combination of at least two of 2, 6-diaminoquinone, 2, 4-dichloroanthraquinone, 1, 5-dichloroanthraquinone, tetrachlorobenzoquinone or dichlorohydroquinone;
preferably, the sulfide comprises lithium sulfide and/or sodium sulfide;
preferably, the solvent comprises any one of tetrahydrofuran, N-dimethylformamide, N-methylpyrrolidone, dimethyl sulfoxide or dimethylacetamide, or a combination of at least two thereof;
preferably, the mass ratio of the quinone monomer to the sulfide is (0.5-1) to (1-3);
preferably, the reaction temperature is 160-250 ℃, and the reaction time is 3-10 h;
preferably, the preparation method further comprises sequentially separating, cleaning and drying reactants obtained after the reaction;
preferably, the separation comprises filtering the reactant obtained after the reaction, and removing the filtrate to obtain a solid precipitate;
preferably, the washing comprises washing with a mixture of water and ethanol.
3. The organic material prepared by the preparation method according to claim 1 or 2;
preferably, the organic material is a porous structure, the size of the pore channel of the porous structure is 2-40nm, and the pore volume of the porous structure is 0.1-0.15cm3/g；
Preferably, the organic material has a number average molecular weight of 5 to 10 ten thousand;
preferably, the content of sulphur in the organic material is between 10 and 16 wt%.
4. An electrode paste, characterized in that the electrode paste comprises the organic material according to claim 3;
preferably, the organic paste further includes a conductive agent, a binder, and a solvent;
preferably, the preparation method of the electrode slurry comprises: dissolving an organic material, a conductive agent and a binder in a solvent, and mixing to obtain the electrode slurry;
preferably, the conductive agent includes acetylene black and/or carbon nanotubes;
preferably, the binder is polyvinylidene fluoride and/or polytetrafluoroethylene;
preferably, the solvent is ethanol and/or N-methylpyrrolidone;
preferably, the mixing is carried out under stirring conditions;
preferably, the mixing rate is 300-.
5. An electrode sheet, characterized in that the electrode sheet comprises a current collector and an electrode slurry layer arranged on the surface of the current collector, wherein the electrode slurry used for the electrode slurry layer is the electrode slurry of claim 4;
preferably, the current collector comprises any one of stainless steel, carbon cloth or carbon paper;
preferably, the thickness of the electrode paste layer is 0.5-1.5 μm;
preferably, the preparation method of the electrode plate comprises the steps of coating electrode slurry on the surface of a current collector, and curing to obtain the electrode plate;
preferably, the coating is knife coating.
6. A BDI system, characterized in that the BDI system comprises a working electrode and a counter electrode, wherein the working electrode is the electrode slice of claim 5;
preferably, the counter electrode is selected from any one or a combination of at least two of a carbon-based material, a bismuth-based material, a silver-based material or an aluminum-based material;
preferably, the counter electrode is selected from any one or a combination of at least two of activated carbon, mesoporous carbon, carbon nanotubes, bismuth oxychloride, elemental bismuth, bismuth oxide or silver chloride.
7. Use of a BDI system according to claim 6 for removing metal ions from a body of water;
preferably, the metal ions include any one or a combination of at least two of sodium ions, magnesium ions, potassium ions, calcium ions, chromium ions, cobalt ions, nickel ions, copper ions, zinc ions, lead ions, cadmium ions, or mercury ions.
8. An electrochemical metal ion removal system comprising a cycling test device and the BDI system of claim 6.
9. Use of an electrochemical metal ion removal system according to claim 8 for removing metal ions from a body of water;
preferably, the metal ions include any one or a combination of at least two of sodium ions, magnesium ions, potassium ions, calcium ions, chromium ions, cobalt ions, nickel ions, copper ions, zinc ions, lead ions, cadmium ions, or mercury ions;
preferably, the water body includes any one of river water, sea water, drinking water or industrial wastewater.
10. The application according to claim 9, wherein the application comprises: under the action of a test voltage of a circulating test device, firstly removing target ions in a water body by using a BDI system, secondly calculating the removal capacity of the metal ions according to the concentration of the metal ions in the water body and charge transfer in an electrochemical reaction process, and then adjusting the arrangement of a working electrode and a counter electrode in the BDI system according to the removal capacity, so that the metal ions in the water body are removed to the maximum extent;
preferably, the concentration of metal ions in the water body is 50-50000 ppm;
preferably, the working voltage of the BDI system is-3V, and the working current density is 20-2000 mA/g;
preferably, the mass ratio of the working electrode to the counter electrode in the BDI system is (1-0.5): (1-2).
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