CN116943603A - Preparation method of recyclable porous adsorption material - Google Patents
Preparation method of recyclable porous adsorption material Download PDFInfo
- Publication number
- CN116943603A CN116943603A CN202310732729.7A CN202310732729A CN116943603A CN 116943603 A CN116943603 A CN 116943603A CN 202310732729 A CN202310732729 A CN 202310732729A CN 116943603 A CN116943603 A CN 116943603A
- Authority
- CN
- China
- Prior art keywords
- steel slag
- metakaolin
- fly ash
- porous
- mixing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 61
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 68
- 239000010959 steel Substances 0.000 claims abstract description 68
- 239000002893 slag Substances 0.000 claims abstract description 44
- 238000001035 drying Methods 0.000 claims abstract description 37
- 229920000876 geopolymer Polymers 0.000 claims abstract description 31
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000002156 mixing Methods 0.000 claims abstract description 29
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002243 precursor Substances 0.000 claims abstract description 28
- 239000010881 fly ash Substances 0.000 claims abstract description 26
- 239000003513 alkali Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 239000011148 porous material Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 230000032683 aging Effects 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 239000012467 final product Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- 239000003463 adsorbent Substances 0.000 claims description 23
- 238000007873 sieving Methods 0.000 claims description 23
- 238000000227 grinding Methods 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 239000005995 Aluminium silicate Substances 0.000 claims description 11
- 235000012211 aluminium silicate Nutrition 0.000 claims description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 10
- 239000011734 sodium Substances 0.000 claims description 9
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 9
- 239000012498 ultrapure water Substances 0.000 claims description 9
- 235000019353 potassium silicate Nutrition 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 239000010883 coal ash Substances 0.000 claims description 5
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- 239000012190 activator Substances 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 3
- 229910001385 heavy metal Inorganic materials 0.000 description 14
- 239000000243 solution Substances 0.000 description 12
- 239000002910 solid waste Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 230000007547 defect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 238000000498 ball milling Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 238000002386 leaching Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 101000749837 Bos taurus Leukocyte cell-derived chemotaxin 1 Proteins 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical class [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 description 1
- CQBLUJRVOKGWCF-UHFFFAOYSA-N [O].[AlH3] Chemical compound [O].[AlH3] CQBLUJRVOKGWCF-UHFFFAOYSA-N 0.000 description 1
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 231100000570 acute poisoning Toxicity 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 231100000739 chronic poisoning Toxicity 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002002 slurry Substances 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
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
- B01J20/12—Naturally occurring clays or bleaching earth
-
- 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
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- 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
- B01J20/28002—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 physical properties
- B01J20/28009—Magnetic properties
-
- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- 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
-
- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Geochemistry & Mineralogy (AREA)
- Dispersion Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a preparation method of a recyclable porous adsorption material. The method comprises the following steps: preparing raw materials; step two: preparing an alkali excitant; step three: mixing raw materials to prepare a porous adsorption material precursor; gasifying fly ash, steel slag and metakaolin according to the mass ratio of (60-70): (25-35)%: mixing the mixture with 0-5% of gasified fly ash-steel slag-metakaolin to obtain a gasified fly ash-steel slag-metakaolin mixture, mixing the gasified fly ash-steel slag-metakaolin mixture with an alkali excitant according to the solid-to-liquid ratio of 0.5-0.8, adding hydrogen peroxide, stirring and granulating to obtain a porous material precursor; step four: aging the geopolymer precursor obtained in the step three for 2 hours under natural conditions, then sending the geopolymer precursor into an oven at 80 ℃ for curing for 24 hours, cooling to obtain a porous adsorption material, repeatedly cleaning, and drying to obtain a final product. The invention has the advantage of improving the adsorption efficiency of the geopolymer material.
Description
Technical Field
The invention relates to the technical field of green preparation technology and water treatment of solid waste adsorption materials, in particular to a preparation method of a recyclable porous adsorption material.
Background
At present, water pollution caused by heavy metals constitutes a serious threat worldwide, producing cumulative, chronic and harmful effects on the environment and on human health. Heavy metals mainly enter the human body through water and food chains, and even if the concentration is very low, the heavy metals can cause serious threat to the health of the human body, and cause respiratory, digestive, nervous, blood, urine and immune symptoms, acute or chronic poisoning and even death. Many methods for removing heavy metals have been proposed, wherein the adsorption method is the most widely used method, and has the competitive advantages of simple process, convenient operation, repeated use and the like.
With the continuous development of industry, the increase of the usage amount of coal causes that a large amount of fly ash and steel slag wastes are generated in China every year, and the solid wastes are not treated effectively in time due to the limited treatment capacity of the solid wastes and are discharged into the environment. The low utilization rate is the root cause of steel slag, fly ash dumping, resource waste and environmental pollution, so the comprehensive utilization of solid wastes is urgent.
The polymer is a polymerized gel of silicon oxygen tetrahedron and aluminum oxygen tetrahedron three-dimensional network prepared by adopting natural minerals or solid wastes and artificial silicon aluminum compounds as raw materials, has a structure similar to that of zeolite molecular sieves, has the advantages of good stability and mechanical property in aqueous solution, low price, environmental protection, difficult generation of secondary pollution and the like, and is often used for solidifying heavy metals in sewage in the aspect of environmental management.
Gasified fly ash is a solid waste produced by shell companies by adopting a novel gasification technology SCGP. It is estimated conservatively that 2 million tons of Shell fly ash (gasified fly ash) are produced annually in China. Shell fly ash is light in weight and soft in texture, and is easily blown away by wind, so that the PM2.5 level in the atmosphere is improved, the human respiratory system is destroyed, and a landfill occupies farmlands, so that soil salinization is caused. From the aspects of phase and chemical composition, the gasified fly ash has more than 90% of amorphous irregular structure, and more than 80% of inorganic matter composition contains Al 2 O 3 、SiO 2 And Fe (Fe) 2 O 3 Has potential gelling activity. Studies have shown that gasified fly ash can synthesize polymers upon activation of an alkali-activator. However, the geopolymer prepared by the prior art under the action of an alkali-activated agent cannot obtain a relatively rich pore structure and has poor adsorption performance.
Therefore, it is necessary to develop a geopolymer material that improves adsorption efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the background technology, and provides a preparation method of a recyclable porous adsorption material, which is a preparation method of a high adsorption efficiency geopolymer material, and utilizes gasified fly ash, steel slag and hydrogen peroxide to prepare a porous geopolymer product with good adsorption effect on heavy metals, and H is introduced into the geopolymer product 2 O 2 Pore-forming is carried out by the foaming agent, so that the specific surface area and the transmission performance of the geopolymer are improved, and the adsorption efficiency of the geopolymer material is improved; overcomes the defect of the prior art that the alkali activator is usedThe geopolymer prepared by the method can not obtain a richer pore structure and has poor adsorption performance.
In order to achieve the above purpose, the technical scheme of the invention is as follows: a preparation method of a recyclable porous adsorption material is characterized by comprising the following steps of: comprises the following steps of the method,
step one: preparing raw materials;
drying the gasified fly ash at 105 ℃, grinding, sieving, and storing in an oven for standby;
drying the steel slag at 105 ℃, grinding and sieving the steel slag by using a ball mill to obtain dried steel slag powder, and placing the dried steel slag powder in an oven for standby; steel slag is used as industrial solid waste and is always treated as inferior clinker; when mechanically activated and chemically modified, the steel slag can be used as a cementing material component or a synthetic adsorbent to remove heavy metals or organic pollutants in an aqueous solution; due to the hydration characteristic of the steel slag, the steel slag contains a large amount of gamma-Fe 3 O 4 The invention adopts steel slag to endow the material with certain magnetism, and solves the defects that the adsorbent is not easy to reject after being used;
burning the kaolin in a box-type muffle furnace at 750 ℃ to obtain metakaolin, cooling, grinding, sieving, drying, and storing in an oven for standby;
step two: preparing an alkali excitant;
preparing sodium hydroxide solution, and mixing with sodium silicate and ultrapure water to prepare a Na/Si alkali excitant;
step three: mixing raw materials to prepare a porous adsorption material precursor;
the Shell fly ash (gasified fly ash), steel slag and metakaolin in the first step are mixed according to the mass ratio of (60-70): (25-35)%: mixing (0-5)% fully to obtain a gasified fly ash-steel slag-metakaolin mixture, mixing with the alkali-activated agent prepared in the second step according to the solid-liquid ratio of 0.5-0.8, adding hydrogen peroxide, stirring, granulating and obtaining a porous material precursor;
according to the invention, a certain amount of hydrogen peroxide is added into the geopolymer slurry as a foaming agent to perform pore-forming, so that the specific surface area and the transmission performance of the geopolymer material are improved, and the reaction product is clean and harmless; the problems of compact structure and low material transmission efficiency of the conventionally prepared geopolymer are overcome;
step four: aging the geopolymer precursor obtained in the step three for 2 hours under natural conditions, then sending the geopolymer precursor into an oven at 80 ℃ for curing for 24 hours, cooling to obtain a porous adsorption material, repeatedly cleaning, and drying to obtain a final product.
In the technical scheme, in the first step, kaolin is placed in a box-type muffle furnace to be burned for 1h at 750 ℃ to obtain metakaolin;
grinding gasified fly ash, steel slag and kaolin, and sieving with a 80-mesh sieve.
In the technical scheme, in the second step, the concentration of the prepared sodium hydroxide solution is 8mol/L;
8mol/L sodium hydroxide solution, water glass and ultrapure water according to the mass ratio of 53 percent: 15%:32% mixing.
In the above technical scheme, in the alkali-activated agent, the molar ratio of Na/Si is 1.27.
In the technical scheme, in the third step, the concentration of the hydrogen peroxide is 7% -10%.
The invention utilizes the fly ash and the steel slag to prepare the porous adsorbent with good adsorption effect on heavy metals, and has the following advantages:
(1) Compounding steel slag, fly ash and metakaolin according to different proportions, and carrying out polymerization reaction under the action of an alkali-exciting agent prepared from sodium hydroxide/sodium silicate in a short time to obtain an adsorbent with a mesoporous structure for adsorbing and removing heavy metal Pb; the material is endowed with certain magnetism by blending the proportion of the steel slag, so that the residual defect of the adsorbent is overcome;
(2) Pore-forming by taking hydrogen peroxide as a foaming agent; h 2 O 2 The gas is rapidly decomposed and produced under an alkali activation system, the generation of a porous structure is accelerated, the average pore diameter of the geopolymer is increased, the pore structure of the geopolymer is enriched, more active sites are provided for the adsorption of heavy metals, the diffusion of heavy metals in the geopolymer is accelerated, and the diffusion of heavy metals in the geopolymer is shortenedAdsorption equilibrium time is shortened;
(3) An effective recycling utilization mode is provided for gasifying large amounts of solid wastes such as fly ash, steel slag and the like, the prepared porous adsorption has remarkable heavy metal adsorption capacity, the leaching concentration of heavy metals detected by an acetic acid buffer solution method of a leaching toxicity leaching method of the solid wastes of HJT-2016 is lower than class III standard of a surface water environment quality standard of GB3838-2002, secondary pollution is avoided, and the effect of waste preparation is achieved;
(4) The material has the advantages of shorter preparation period, simpler and more convenient synthesis process, and more economic and environment-friendly chemical reagents; overcomes the defects of long preparation period, complex synthesis process, high cost of the used chemical reagent and pollution of the materials in the prior art;
(5) The invention can be recovered by magnetic force, and the material in the water body still has stronger capability of being absorbed by the magnet due to the addition of a certain amount of steel slag; the invention can recycle the adsorbent, improve the recycling performance of the invention, reduce the investment cost and reduce the environmental pollution; solves the problem that the adsorbent is not easy to be removed after being used.
Drawings
FIG. 1 is an XRD pattern of porous fly ash-steel slag-metakaolin obtained in example one of the present invention.
FIG. 2 is a graph of hysteresis curves of porous fly ash-steel slag-metakaolin obtained in example one of the present invention.
FIG. 3 is a flow chart of the process of the present invention.
Fig. 4 is a process flow diagram of the present invention.
In fig. 3, SS represents steel slag; PGS means a recyclable porous adsorbent material according to the present invention; CGFA represents gasified fly ash; pb represents lead.
Detailed Description
The following detailed description of the invention is, therefore, not to be taken in a limiting sense, but is made merely by way of example. While making the advantages of the present invention clearer and more readily understood by way of illustration.
As can be seen with reference to the accompanying drawings: a method for preparing a porous geopolymer adsorption material, comprising the following steps:
(1) The preparation of raw materials: drying the gasified fly ash at 105 ℃, grinding, sieving with a 80-mesh sieve, and storing in an oven for standby; drying the steel slag at 105 ℃, grinding the steel slag by using a ball mill, sieving the steel slag by using an 80-mesh sieve to obtain dried steel slag powder, and placing the dried steel slag powder in an oven for standby; and (3) placing the kaolin into a box-type muffle furnace to burn for 1h at 750 ℃ to obtain metakaolin, cooling, grinding, sieving with a 80-mesh sieve, drying, and placing into an oven to be stored for later use.
(2) Preparing an alkali-exciting agent: preparing 8mol/L sodium hydroxide solution, and mixing with water glass and ultrapure water according to the mass ratio of (53:15:32)%, so as to prepare the alkali-activated agent with the Na/Si molar ratio of 1.27.
(3) Raw materials are mixed to prepare a porous adsorption material precursor: the Shell fly ash, steel slag and metakaolin in the step (1) are mixed according to the mass ratio of (60-70): (25-35)%: fully mixing (0-5)% to obtain a gasified fly ash-steel slag-metakaolin mixture, mixing the gasified fly ash-steel slag-metakaolin mixture with the alkali-activated agent prepared in the step (4) according to the solid-to-liquid ratio of 0.5-0.8, adding hydrogen peroxide with the concentration of 7-10%, stirring and granulating to obtain a porous material precursor; the steel slag is introduced, so that the strength can be increased, the material can be magnetic, and the recycling defect problem can be solved; the hydrogen peroxide is adopted to perform pore-forming, improve the pore structure of the geopolymer and increase the adsorption performance of the geopolymer;
(4) Curing: aging the geopolymer precursor obtained in the step (3) for 2 hours under natural conditions, then feeding the geopolymer precursor into an oven at 80 ℃ for curing for 24 hours, cooling to obtain a porous adsorption material, repeatedly cleaning, and drying to obtain a final product (shown in figure 4).
FIG. 1 shows XRD of the porous fly ash-steel slag-metakaolin obtained in example one, and it can be seen from the figure that the porous material has a substantially amorphous structure, but a trace amount of crystalline phase, such as ZK-5 zeolite, can also be observed. At the same time, the presence of wustite, which is introduced by the steel slag, can also be observed.
FIG. 2 is a hysteresis curve graph of porous fly ash-slag-metakaolin obtained in example one, wherein PGSA represents the porous geopolymer adsorbent material after adsorption. The graph results of the hysteresis curve of the adsorbed porous geopolymer adsorbent material shown in fig. 2 show that: the addition of the steel slag makes the porous material magnetic, and provides the recoverability for the developed porous material. In fig. 2, the saturation magnetization of the material according to the invention is about 1emu/g, which is magnetic, according to the hysteresis curve, whereas in the physical diagram in fig. 2, the test tube is filled with the powder material according to the invention and rests on a square magnet, as can be seen from the physical diagram in fig. 2: the material of the invention is totally gathered on the contact surface of the test tube and the square magnet in the test tube, which indicates that the material of the invention can be attracted by the magnet.
FIG. 2 (a) is a graph showing the hysteresis loop curve of porous fly ash-steel slag-metakaolin obtained in example one of the present invention; fig. 2 (b) shows a hysteresis loop diagram of porous fly ash-steel slag-metakaolin obtained in example one of the present invention near zero (i.e., an enlarged view at a of fig. 2 (a)); meanwhile, the curve of the graph (b) in fig. 2 is the hysteresis curve of the porous geopolymer adsorbent after adsorption; fig. 2 (c) shows a magnetic force test object of the present invention. In fig. 2 (c), B1 represents a magnet; b2 represents a test tube; b3 represents the porous adsorbing material of the present invention.
Examples
Example one
A recyclable porous adsorbent material, the process comprising the steps of:
(1) Drying the gasified fly ash at 105 ℃, grinding, sieving with a 80-mesh sieve, and placing in a drying oven for standby;
(2) Drying the steel slag in a 105 ℃ oven, ball-milling for 30 minutes under the condition of 800 bricks/min by using a ball mill, sieving with a 80-mesh sieve, and storing in a drying oven for later use;
(3) Placing the kaolin into a box-type muffle furnace, burning for 1h at 750 ℃ to obtain metakaolin, cooling, grinding, sieving with an 80 sieve, and placing into a drying oven for standby;
(4) Preparing 8mol/L sodium hydroxide solution, and mixing with water glass and ultrapure water according to the mass ratio of (53:15:32)%, thereby preparing the alkali-activated agent with the Na/Si molar ratio of 1.27.
(5) Gasifying coal ash, steel slag and metakaolin according to 67:30:3, weighing and fully mixing the materials according to the mass ratio to obtain a gasified fly ash-steel slag-metakaolin mixture, mixing the gasified fly ash-steel slag-metakaolin mixture with the alkali-activated agent prepared in the step (4) according to the solid-to-liquid ratio of 0.5, stirring, granulating, and adding hydrogen peroxide with the concentration of 8.5% to obtain a porous adsorption material precursor;
(6) Aging the porous adsorption material precursor obtained in the step (5) for 2 hours under natural conditions, then feeding the porous adsorption material precursor into an oven at 80 ℃ for curing for 24 hours, cooling to obtain the coal ash-steel slag-metakaolin porous adsorbent, repeatedly cleaning, and drying to obtain a final product.
And (3) taking 0.04g of each ceramsite obtained in the step (6), respectively adding the ceramsite into 40ml of simulated lead pollution solution with the concentration of 50mg/L, and adsorbing for 24 hours at 25 ℃, wherein the adsorption efficiency of the ceramsite on lead can reach 57.20%, and the adsorption capacity is 38.85mg/g.
Example two
A recyclable porous adsorbent material, the process comprising the steps of:
(1) Drying the gasified fly ash at 105 ℃, grinding, sieving with a 80-mesh sieve, and placing in a drying oven for standby;
(2) Drying the steel slag in a 105 ℃ oven, ball-milling for 30 minutes under the condition of 800 bricks/min by using a ball mill, sieving with a 80-mesh sieve, and storing in a drying oven for later use;
(3) Placing the kaolin into a box-type muffle furnace, burning for 1h at 750 ℃ to obtain metakaolin, cooling, grinding, sieving with an 80 sieve, and placing into a drying oven for standby;
(4) Preparing 8mol/L sodium hydroxide solution, and mixing with water glass and ultrapure water according to the mass ratio of (53:15:32)%, thereby preparing the alkali-activated agent with the Na/Si molar ratio of 1.27.
(5) Gasifying coal ash, steel slag and metakaolin according to 67:30:3, weighing and fully mixing the materials according to the mass ratio to obtain a gasified fly ash-steel slag-metakaolin mixture, mixing the gasified fly ash-steel slag-metakaolin mixture with the alkali-activated agent prepared in the step (4) according to the solid-to-liquid ratio of 0.5, stirring, granulating, and adding hydrogen peroxide with the concentration of 7.5% to obtain a porous adsorption material precursor;
(6) Aging the porous adsorption material precursor obtained in the step (5) for 2 hours under natural conditions, then feeding the porous adsorption material precursor into an oven at 80 ℃ for curing for 24 hours, cooling to obtain the coal ash-steel slag-metakaolin porous adsorbent, repeatedly cleaning, and drying to obtain a final product.
And (3) taking 0.04g of each ceramsite obtained in the step (6), respectively adding the ceramsite into 40ml of simulated lead pollution solution with the concentration of 50mg/L, and adsorbing for 24 hours at 25 ℃, wherein the adsorption efficiency of lead reaches 54.53%, and the adsorption capacity is 37.52mg/g.
Example three
A recyclable porous adsorbent material, the process comprising the steps of:
(1) Drying the gasified fly ash at 105 ℃, grinding, sieving with a 80-mesh sieve, and placing in a drying oven for standby;
(2) Drying the steel slag in a 105 ℃ oven, ball-milling for 30 minutes under the condition of 800 bricks/min by using a ball mill, sieving with a 80-mesh sieve, and storing in a drying oven for later use;
(3) Placing the kaolin into a box-type muffle furnace, burning for 1h at 750 ℃ to obtain metakaolin, cooling, grinding, sieving with an 80 sieve, and placing into a drying oven for standby;
(4) Preparing 8mol/L sodium hydroxide solution, and mixing with water glass and ultrapure water according to the mass ratio of (53:15:32)%, thereby preparing the alkali-activated agent with the Na/Si molar ratio of 1.27.
(5) Gasifying coal ash, steel slag and metakaolin according to 67:30:3, weighing and fully mixing the materials according to the mass ratio to obtain a gasified fly ash-steel slag-metakaolin mixture, mixing the gasified fly ash-steel slag-metakaolin mixture with the alkali-activated agent prepared in the step (4) according to the solid-to-liquid ratio of 0.5, stirring, granulating, and adding hydrogen peroxide with the concentration of 9.5% to obtain a porous adsorption material precursor;
(6) Aging the porous adsorption material precursor obtained in the step (5) for 2 hours under natural conditions, then feeding the porous adsorption material precursor into an oven at 80 ℃ for curing for 24 hours, cooling to obtain the coal ash-steel slag-metakaolin porous adsorbent, repeatedly cleaning, and drying to obtain a final product.
And (3) taking 0.04g of each ceramsite obtained in the step (6), respectively adding the ceramsite into 40ml of simulated lead pollution solution with the concentration of 50mg/L, and adsorbing for 24 hours at 25 ℃, wherein the adsorption efficiency of lead reaches 52.45%, and the adsorption capacity is 36.22mg/g.
Example four
A porous geopolymer adsorbent material, the preparation process comprising the steps of:
(1) Drying the gasified fly ash at 105 ℃, grinding, sieving with a 80-mesh sieve, and placing in a drying oven for standby;
(2) Drying the steel slag in a 105 ℃ oven, ball-milling for 30 minutes under the condition of 800 bricks/min by using a ball mill, sieving with a 80-mesh sieve, and storing in a drying oven for later use;
(3) Placing the kaolin into a box-type muffle furnace, burning for 1h at 750 ℃ to obtain metakaolin, cooling, grinding, sieving with an 80 sieve, and placing into a drying oven for standby;
(4) Preparing 8mol/L sodium hydroxide solution, and mixing with water glass and ultrapure water according to the mass ratio of (53:15:32)%, thereby preparing the alkali-activated agent with the Na/Si molar ratio of 1.27.
(5) Gasifying coal ash, steel slag and metakaolin according to 67:30:3, weighing and fully mixing the materials according to the mass ratio to obtain a gasified fly ash-steel slag-metakaolin mixture, mixing the gasified fly ash-steel slag-metakaolin mixture with the alkali-activated agent prepared in the step (4) according to the solid-liquid ratio of 0.5, stirring and granulating the mixture to obtain an adsorption material precursor without adding hydrogen peroxide;
(6) Aging the adsorption material precursor obtained in the step (5) for 2 hours under natural conditions, then feeding the adsorption material precursor into an oven at 80 ℃ for curing for 24 hours, cooling to obtain the coal ash-steel slag-metakaolin porous adsorbent, repeatedly cleaning, and drying to obtain a final product.
And (3) taking 0.2g of each ceramsite obtained in the step (6), respectively adding the ceramsite into 40ml of simulated lead pollution solution with the concentration of 50mg/L, and adsorbing for 24 hours at 25 ℃, wherein the adsorption efficiency of the ceramsite on lead reaches 35.94%, and the adsorption capacity is 24.82mg/g.
As can be seen from the above examples 1, 2, 3: the porous recyclable adsorbing material prepared in example 1 has better adsorbing effect than the porous recyclable adsorbing materials prepared in examples 2 and 3. Comparative examples 1, 2, 3 and example 4 can be seen: the porous recyclable adsorbing materials prepared in examples 1, 2 and 3 were superior to example 4 in adsorption effect.
Other non-illustrated parts are known in the art.
Claims (5)
1. A preparation method of a recyclable porous adsorption material is characterized by comprising the following steps of: comprises the following steps of the method,
step one: preparing raw materials;
drying the gasified fly ash at 105 ℃, grinding, sieving, and storing in an oven for standby;
drying the steel slag at 105 ℃, grinding and sieving the steel slag by using a ball mill to obtain dried steel slag powder, and placing the dried steel slag powder in an oven for standby;
burning the kaolin in a box-type muffle furnace at 750 ℃ to obtain metakaolin, cooling, grinding, sieving, drying, and storing in an oven for standby;
step two: preparing an alkali excitant;
preparing sodium hydroxide solution, and mixing with sodium silicate and ultrapure water to prepare a Na/Si alkali excitant;
step three: mixing raw materials to prepare a porous adsorption material precursor;
gasifying coal ash, steel slag and metakaolin in the first step according to the mass ratio of (60-70): (25-35)%: mixing (0-5)% fully to obtain a gasified fly ash-steel slag-metakaolin mixture, mixing with the alkali-activated agent prepared in the second step according to the solid-liquid ratio of 0.5-0.8, adding hydrogen peroxide, stirring, granulating and obtaining a porous material precursor;
step four: aging the geopolymer precursor obtained in the step three for 2 hours under natural conditions, then sending the geopolymer precursor into an oven at 80 ℃ for curing for 24 hours, cooling to obtain a porous adsorption material, repeatedly cleaning, and drying to obtain a final product.
2. The method for producing a recyclable porous adsorbent according to claim 1, wherein: in the first step, kaolin is placed in a box-type muffle furnace to be burned for 1h at 750 ℃ to obtain metakaolin;
grinding gasified fly ash, steel slag and kaolin, and sieving with a 80-mesh sieve.
3. The method for producing a recyclable porous adsorbent according to claim 1 or 2, wherein: in the second step, the concentration of the prepared sodium hydroxide solution is 8mol/L;
8mol/L sodium hydroxide solution, water glass and ultrapure water according to the mass ratio of 53 percent: 15%:32% mixing.
4. A method of preparing a recyclable porous adsorbent according to claim 3, wherein: in the alkali-activator, the molar ratio of Na/Si was 1.27.
5. The method for producing a recyclable porous adsorbent according to claim 4, wherein: in the third step, the concentration of the hydrogen peroxide is 7% -10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310732729.7A CN116943603A (en) | 2023-06-20 | 2023-06-20 | Preparation method of recyclable porous adsorption material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310732729.7A CN116943603A (en) | 2023-06-20 | 2023-06-20 | Preparation method of recyclable porous adsorption material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116943603A true CN116943603A (en) | 2023-10-27 |
Family
ID=88441816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310732729.7A Pending CN116943603A (en) | 2023-06-20 | 2023-06-20 | Preparation method of recyclable porous adsorption material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116943603A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118341410A (en) * | 2024-04-01 | 2024-07-16 | 长江勘测规划设计研究有限责任公司 | Substrate sludge active covering material and preparation method and application thereof |
| CN118562480A (en) * | 2024-06-26 | 2024-08-30 | 中国石油大学(华东) | Fracturing fluid gel breaker carrier and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105753502A (en) * | 2016-02-26 | 2016-07-13 | 重庆大学 | Preparation method for inorganic/organic composite foamed light thermal-insulation material |
| CN109400016A (en) * | 2018-09-29 | 2019-03-01 | 盐城工学院 | Geo-polymer porous insulation material and preparation method thereof based on burning city domestic garbage bottom ash |
| CN111790352A (en) * | 2020-06-28 | 2020-10-20 | 中国地质大学（武汉） | Adsorbent capable of removing heavy metals in industrial wastewater and preparation method thereof |
| CN113526911A (en) * | 2021-06-09 | 2021-10-22 | 安徽理工大学 | Porous fly ash-based geopolymer, preparation method and application thereof in wastewater treatment |
| CN113831068A (en) * | 2021-09-29 | 2021-12-24 | 南京信息工程大学 | Preparation method and application of porous geopolymer material |
| CN114394774A (en) * | 2021-12-28 | 2022-04-26 | 武汉大学(肇庆)资源与环境技术研究院 | Geopolymer and preparation precursor, preparation method and application thereof |
| WO2022223640A1 (en) * | 2021-04-24 | 2022-10-27 | Construction Research & Technology Gmbh | Geopolymer foams based on ceramic materials |
-
2023
- 2023-06-20 CN CN202310732729.7A patent/CN116943603A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105753502A (en) * | 2016-02-26 | 2016-07-13 | 重庆大学 | Preparation method for inorganic/organic composite foamed light thermal-insulation material |
| CN109400016A (en) * | 2018-09-29 | 2019-03-01 | 盐城工学院 | Geo-polymer porous insulation material and preparation method thereof based on burning city domestic garbage bottom ash |
| CN111790352A (en) * | 2020-06-28 | 2020-10-20 | 中国地质大学（武汉） | Adsorbent capable of removing heavy metals in industrial wastewater and preparation method thereof |
| WO2022223640A1 (en) * | 2021-04-24 | 2022-10-27 | Construction Research & Technology Gmbh | Geopolymer foams based on ceramic materials |
| CN113526911A (en) * | 2021-06-09 | 2021-10-22 | 安徽理工大学 | Porous fly ash-based geopolymer, preparation method and application thereof in wastewater treatment |
| CN113831068A (en) * | 2021-09-29 | 2021-12-24 | 南京信息工程大学 | Preparation method and application of porous geopolymer material |
| CN114394774A (en) * | 2021-12-28 | 2022-04-26 | 武汉大学(肇庆)资源与环境技术研究院 | Geopolymer and preparation precursor, preparation method and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118341410A (en) * | 2024-04-01 | 2024-07-16 | 长江勘测规划设计研究有限责任公司 | Substrate sludge active covering material and preparation method and application thereof |
| CN118562480A (en) * | 2024-06-26 | 2024-08-30 | 中国石油大学(华东) | Fracturing fluid gel breaker carrier and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116943603A (en) | Preparation method of recyclable porous adsorption material | |
| CN101318788B (en) | Inorganic polymer material for sealing heavy metal castoff | |
| CN113333436B (en) | All-component comprehensive utilization method of coal gasification fine slag | |
| CN113998982A (en) | Full-solid waste base carbonated unfired lightweight aggregate and preparation method thereof | |
| Ji et al. | Nitrogen and phosphorus adsorption behavior of ceramsite material made from coal ash and metallic iron | |
| CN111393083A (en) | Full-solid-waste high-performance concrete and preparation method and application thereof | |
| Liu et al. | A new approach to CO2 capture and sequestration: A novel carbon capture artificial aggregates made from biochar and municipal waste incineration bottom ash | |
| CN114394800B (en) | Method for resource utilization of sludge biochar | |
| CN111847938A (en) | Method for producing environment-friendly ceramsite by utilizing biogas residue hydrothermal carbon | |
| Liu et al. | Carbonation of steel slag at low CO2 concentrations: Novel biochar cold-bonded steel slag artificial aggregates | |
| CN111377497B (en) | Sodium alginate-embedded iron carbon-medical stone efficient phosphorus removal particle and preparation method thereof | |
| CN113318738A (en) | Solid waste based biochar material, preparation method thereof and application of biochar material as additive material for improving sludge dewatering performance | |
| CN116553541A (en) | Method for preparing activated carbon and cementing material by cooperatively utilizing waste incineration fly ash and oil sludge | |
| CN117185691B (en) | Method for regenerating baking-free artificial lightweight aggregate by cooperatively disposing aluminum ash and garbage incineration fly ash | |
| WO2010020079A1 (en) | Sewage sludge cement and preparation thereof | |
| CN101357829A (en) | Strengthening agent for construction material prepared by carbonizing curing waste | |
| CN114031323B (en) | Red mud-based artificial aggregate with core-shell structure and preparation method thereof | |
| CN115710112A (en) | Dredged sludge composite curing agent and preparation method and application thereof | |
| CN115178227A (en) | Magnetic adsorption material for gasified slag and preparation method thereof | |
| CN111888913B (en) | Granular biological filter material for biological deodorization of waste gas based on dewatered sludge of municipal sewage plant, preparation method and application | |
| CN112441661A (en) | Polymer composite carrier for water treatment and preparation method and application thereof | |
| CN103553466A (en) | FGD (flue gas desulfurization) desulfurized fly ash solidifying agent and preparation method thereof | |
| CN112295547A (en) | Preparation method of fly ash/carboxymethyl cellulose/chitosan composite material | |
| CN112624247A (en) | Method for removing boron and phosphorus in wastewater by coupling shell powder | |
| CN111377498A (en) | Multifunctional novel composite efficient phosphorus removal filler and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |