CN115624951A - Cobalt ion rapid enrichment material and preparation method thereof - Google Patents
Cobalt ion rapid enrichment material and preparation method thereof Download PDFInfo
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- CN115624951A CN115624951A CN202211366188.2A CN202211366188A CN115624951A CN 115624951 A CN115624951 A CN 115624951A CN 202211366188 A CN202211366188 A CN 202211366188A CN 115624951 A CN115624951 A CN 115624951A
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- 229910001429 cobalt ion Inorganic materials 0.000 title claims abstract description 42
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- MKPXGEVFQSIKGE-UHFFFAOYSA-N [Mg].[Si] Chemical compound [Mg].[Si] MKPXGEVFQSIKGE-UHFFFAOYSA-N 0.000 claims abstract description 33
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 27
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 26
- 239000012634 fragment Substances 0.000 claims abstract description 17
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 claims abstract description 16
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 8
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 13
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 11
- 239000000347 magnesium hydroxide Substances 0.000 claims description 11
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 11
- 239000004964 aerogel Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 2
- 239000011812 mixed powder Substances 0.000 claims 1
- 239000008187 granular material Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 description 21
- 239000010941 cobalt Substances 0.000 description 21
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 238000001179 sorption measurement Methods 0.000 description 8
- 239000000377 silicon dioxide Substances 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- -1 hexafluorophosphate Chemical compound 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 201000004384 Alopecia Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 231100000360 alopecia Toxicity 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- YMHQVDAATAEZLO-UHFFFAOYSA-N cyclohexane-1,1-diamine Chemical compound NC1(N)CCCCC1 YMHQVDAATAEZLO-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram 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
- 238000011067 equilibration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 208000032839 leukemia Diseases 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 125000002097 pentamethylcyclopentadienyl group Chemical group 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000000352 supercritical drying Methods 0.000 description 1
- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28019—Spherical, ellipsoidal or cylindrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
The invention discloses a cobalt ion rapid enrichment material and a preparation method thereof, belonging to the field of new materials. The invention prepares silicon-magnesium gel fragments by using tetraethoxysilane and magnesium nitrate as raw materials, crushes the fragments into powder, and connects and forms the powder by using light-burned magnesia to obtain the spherical or flake cobalt ion enrichment material. The cobalt ion enrichment material has high enrichment capacity (up to 430 mg/g) and fast enrichment rate for cobalt ions, and has the other advantage that compared with powder or granular materials, the spherical or flaky block cobalt ion enrichment material is convenient to recycle and can be regenerated.
Description
Technical Field
The invention belongs to the technical field of new materials, and particularly relates to a cobalt ion rapid enrichment material and a preparation method thereof.
Background
Cobalt is an important strategic scarce metal, and is used as an electrode material in the field of new energy, and cobalt ions are often required to be addedThe water solution is enriched and reused by acid washing. In addition, heavy metal pollution is a serious environmental problem, and heavy metals are easily enriched in human bodies through biological chains and seriously harm human health. Cobalt is an important metal resource, has wide application field, is widely applied to the aspects of new energy, magnetic materials, superhard materials, glass materials and the like, and has isotope C of cobalt O -60 is commonly used in radiotherapy of malignant diseases and as tracer atoms, among others. Due to the widespread use of cobalt, a large amount of cobalt-containing wastewater is generated. According to the discharge standard of industrial pollutants of copper, nickel and cobalt in GB25467-2010, the concentration of the discharged cobalt is not higher than one million molecules. If the cobalt content in the human body exceeds the standard, a plurality of health problems such as poisoning, bone defect and the like can be caused, and in addition, the isotope C of the cobalt O -60 is also a pathogenic factor for diseases such as alopecia and leukemia.
The prior art mainly comprises a chemical precipitation method, a solvent extraction method, a membrane separation method and an adsorption method. The adsorption method is divided into physical adsorption and chemical adsorption. Chinese patent with application number CN201610408099.8 discloses a preparation method of a cobalt adsorbent, and the specific technical scheme is that cobalt bis (pentamethylcyclopentadienyl) hexafluorophosphate, cyclohexanediamine bis (di-tert-butylsalicyline) cobalt and imide salt are introduced into polymerization for polymerization to prepare the cobalt adsorbent. Has the defects of complex preparation process and no regeneration. Chinese patent publication No. CN 1038490A discloses a method for removing cobalt from cobalt-containing wastewater, which uses sodium hypochlorite and oxidative precipitation of cobalt-containing wastewater. Chinese patent publication No. CN103620065A discloses a method for extracting cobalt from an acidic solution using a valuable metal composed of an amide derivative. Chinese patent application No. CN201910862244.3 discloses the adsorption of cobalt by ion exchange. The cobalt treatment method generally has the problems of complex preparation process, slow enrichment speed and incapability of repeatedly using a matrix.
Disclosure of Invention
The invention aims to solve the problems and discloses a cobalt ion rapid enrichment material and a preparation method thereof, wherein the cobalt ion rapid enrichment material comprises silicon-magnesium gel and magnesium hydroxide, and is structurally a silicon-magnesium micropore and magnesium hydroxide mesoporous complex, the preparation method of the cobalt ion rapid enrichment material comprises the steps of dropwise adding 5-20g of ethyl orthosilicate into 100g of a 1-20% magnesium nitrate aqueous solution, then dropwise adding 1-5g of a silane coupling agent, standing for 24 hours to obtain rigid silicon-magnesium gel, then placing the rigid silicon-magnesium gel in an oven for drying to obtain silicon-magnesium aerogel fragments rich in micropore structures, crushing the fragments into powder, and then uniformly mixing with hydraulic magnesium oxide, wherein the mass percentage of the magnesium oxide is 30-70%. Then uniformly mixing the powder according to the water-powder ratio of 1;1 adding water, and hardening and forming to obtain the spherical or sheet block cobalt ion rapid enrichment material.
The existence of magnesium in the silicon-magnesium gel plays a great role in improving the enrichment rate, and the mechanism is that the basic sites of the silicon-magnesium gel realize the rapid enrichment of cobalt ions.
The hydraulic magnesium oxide is obtained by quickly burning magnesium hydroxide at 300-700 ℃, has hydraulic property, is an inorganic binder to bind silicon-magnesium gel powder into a block with higher strength, and forms a rich mesoporous structure after self hydration and participates in the enrichment of cobalt ions.
Has the beneficial effects that; the cobalt ion rapid enrichment material is an inorganic material, and can regenerate the enriched cobalt ions after acid cleaning, thereby realizing recycling. The cobalt ion rapid enrichment material has high enrichment capacity which can reach 430mg/g, and has rapid enrichment speed and 3-hour enrichment saturation. In addition, the enrichment material is a spherical or sheet block material, and is more convenient to recover compared with conventional powder or particle materials such as activated carbon, molecular sieves and the like. The hydraulic magnesium oxide and silicon magnesium gel of the invention have higher strength after hydration, and are not easy to wear and disintegrate after repeated use. Finally, in the preparation process of the silicon-magnesium gel, the invention greatly simplifies the complex process in the prior art and does not need complex and lengthy process procedures such as aging, solvent exchange, hydrophobic modification, supercritical drying and the like.
The cobalt ion enrichment test characterization method comprises the following steps: preparing 500mg/l cobalt chloride aqueous solution, testing the adsorption effect of the cobalt adsorption material by using an ultraviolet spectrophotometer, and specifically characterizing the adsorption effect of cobalt by using the absorbance of cobalt ions at the characteristic absorption wavelength of 510 nm.
Drawings
FIG. 1 example 1 digital photograph of cobalt ion enriched material for rapid enrichment of cobalt ion
FIG. 2 is a diagram showing the UV-Vis spectra of cobalt chloride solution with 0.5% by mass fraction
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall still fall within the scope of protection of the present invention.
Example 1
5g of ethyl orthosilicate is dropwise added into 100g of a 1% magnesium nitrate aqueous solution, then 1 g of silane coupling agent is dropwise added, the mixture is placed for 24 hours to obtain rigid silicon-magnesium gel, the obtained rigid silicon-magnesium gel is placed in an oven to be dried to obtain silicon-magnesium aerogel fragments rich in a micropore structure, the fragments are crushed into powder and then are uniformly mixed with hydraulic magnesium oxide, wherein the mass percentage of the hydraulic magnesium oxide is 30%. And then uniformly mixing the powder according to the water-powder ratio of 1:1 adding water, and hardening and forming to obtain the sheet block cobalt ion rapid enrichment material. The main components of the prepared cobalt ion rapid enrichment material are silicon dioxide, magnesium oxide and magnesium hydroxide. The equilibrium enrichment time was 3 hours and the saturation enrichment capacity was 200mg/g.
Example 2
8 g of ethyl orthosilicate is dropwise added into 100g of a 3% magnesium nitrate aqueous solution, then 2 g of silane coupling agent is dropwise added, the mixture is placed for 24 hours to obtain rigid silicon-magnesium gel, the obtained rigid silicon-magnesium gel is placed in an oven to be dried to obtain silicon-magnesium aerogel fragments rich in a micropore structure, the fragments are crushed into powder and then are uniformly mixed with hydraulic magnesium oxide, wherein the mass percentage of the hydraulic magnesium oxide is 40%. Then uniformly mixing the powder according to the water-powder ratio of 1;1, adding water, and hardening and forming to obtain the spherical or sheet block cobalt ion rapid enrichment material. The main components of the prepared cobalt ion rapid enrichment material are silicon dioxide, magnesium oxide and magnesium hydroxide. The equilibrium enrichment time was 3 hours and the saturated enrichment capacity was 260mg/g.
Example 3
12 g of ethyl orthosilicate is dripped into 100g of 10% magnesium nitrate aqueous solution, then 3 g of silane coupling agent is dripped, rigid silicon-magnesium gel is obtained after the mixture is placed for 24 hours, then the obtained rigid silicon-magnesium gel is placed in an oven and dried to obtain silicon-magnesium aerogel fragments rich in microporous structures, the fragments are crushed into powder and then are uniformly mixed with hydraulic magnesium oxide, wherein the mass percentage of the hydraulic magnesium oxide is 50%. Then uniformly mixing the powder according to the water-powder ratio of 1;1, adding water, and hardening and forming to obtain the spherical or sheet block cobalt ion rapid enrichment material. The main components of the prepared cobalt ion rapid enrichment material are silicon dioxide, magnesium oxide and magnesium hydroxide. The equilibrium enrichment time was 3 hours and the saturation enrichment capacity was 280mg/g.
Example 4
16 g of ethyl orthosilicate is dripped into 100g of 15% magnesium nitrate aqueous solution, then 4 g of silane coupling agent is dripped, rigid silicon-magnesium gel is obtained after standing for 24 hours, the obtained rigid silicon-magnesium gel is placed into an oven and dried to obtain silicon-magnesium aerogel fragments rich in micropore structures, the fragments are crushed into powder and then are uniformly mixed with hydraulic magnesium oxide, wherein the mass percentage of the hydraulic magnesium oxide is 60%. Then uniformly mixing the powder according to the water-powder ratio of 1;1 adding water, and hardening and forming to obtain the spherical or sheet block cobalt ion rapid enrichment material. The main components of the prepared cobalt ion rapid enrichment material are silicon dioxide, magnesium oxide and magnesium hydroxide. The equilibrium enrichment time was 3 hours and the saturated enrichment capacity was 320mg/g.
Example 5
20g of ethyl orthosilicate is dripped into 100g of a 20% magnesium nitrate aqueous solution, then 5g of silane coupling agent is dripped, rigid silicon-magnesium gel is obtained after the mixture is placed for 24 hours, then the obtained rigid silicon-magnesium gel is placed in an oven and dried to obtain silicon-magnesium aerogel fragments rich in a micropore structure, the fragments are crushed into powder and then are uniformly mixed with hydraulic magnesium oxide, wherein the mass percentage of the hydraulic magnesium oxide is 70%. Then uniformly mixing the powder according to the water-powder ratio of 1;1, adding water, and hardening and forming to obtain the spherical or sheet block cobalt ion rapid enrichment material. The main components of the prepared cobalt ion rapid enrichment material are silicon dioxide, magnesium oxide and magnesium hydroxide. The equilibration enrichment time was 3 hours and the saturation enrichment capacity was 430mg/g.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The cobalt ion fast enriching material features that the cobalt ion enriching material consists of silica-magnesia gel and magnesium hydroxide, and the silica-magnesia gel has microporous structure and the magnesium hydroxide has mesoporous structure.
2. The cobalt ion rapid enrichment material of claim 1, wherein the cobalt ion rapid enrichment material has an equilibrium enrichment capacity of up to 430mg/L and an equilibrium enrichment rate of up to 3 hours.
3. The cobalt ion rapid enrichment material of claim 1, wherein the macroscopic morphology of the cobalt ion rapid enrichment material is a spherical or a plate-shaped block.
4. The method for preparing the cobalt ion rapid enrichment material according to any one of claims 1 to 3, which is characterized by comprising the following steps:
step one, preparation of rigid silicon-magnesium gel: dropwise adding 5-20g of ethyl orthosilicate into 100g of magnesium nitrate aqueous solution with the mass fraction of 1-20%, then dropwise adding 1-5g of silane coupling agent, and standing for 24 hours to obtain rigid silicon-magnesium gel;
step two, preparing silicon-magnesium aerogel fragments: drying the rigid silicon-magnesium gel prepared in the step one in an oven to obtain silicon-magnesium aerogel fragments rich in microporous structures;
step three, preparing the cobalt ion enrichment material: crushing the silicon-magnesium aerogel fragments prepared in the step two into powder, mixing the powder with hydraulic magnesium oxide uniformly, and mixing the uniformly mixed powder according to the water-powder ratio of 1:1 adding water, and hardening and forming to obtain the cobalt ion enrichment material.
5. The method of claim 3, wherein the hydraulic magnesium oxide is prepared by soft-burning magnesium hydroxide at 300-700 ℃.
6. The method for preparing the rapid cobalt ion enrichment material of claim 3, wherein the hydraulic magnesium oxide accounts for 30-70% of the total amount of the hydraulic magnesium oxide and the crushed silicon-magnesium aerogel after being crushed into powder.
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|---|---|---|---|---|
| GB820986A (en) * | 1957-04-25 | 1959-09-30 | Grace W R & Co | Process for preparing a silica-magnesia hydrocarbon cracking catalyst |
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| CN103214034A (en) * | 2013-04-19 | 2013-07-24 | 天津大学 | Preparation method of zirconium oxide-silicon oxide composite aerogel |
| CN105478074A (en) * | 2015-12-23 | 2016-04-13 | 中国科学院烟台海岸带研究所 | Preparation method and application of heavy metal ion remover |
| CN107175080A (en) * | 2016-03-10 | 2017-09-19 | 中国科学院理化技术研究所 | It is a kind of to be used to go biomass-based sorbing material of heavy metal ion and its preparation method and application in water removal |
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