CN112076756A - Preparation and application of composite metal water treatment microwave advanced oxidation catalyst - Google Patents
Preparation and application of composite metal water treatment microwave advanced oxidation catalyst Download PDFInfo
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- CN112076756A CN112076756A CN202011133584.1A CN202011133584A CN112076756A CN 112076756 A CN112076756 A CN 112076756A CN 202011133584 A CN202011133584 A CN 202011133584A CN 112076756 A CN112076756 A CN 112076756A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 36
- 239000002184 metal Substances 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 230000003647 oxidation Effects 0.000 title claims abstract description 24
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000003610 charcoal Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 20
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 17
- 150000003624 transition metals Chemical class 0.000 claims abstract description 17
- 239000005749 Copper compound Substances 0.000 claims abstract description 16
- 150000001880 copper compounds Chemical class 0.000 claims abstract description 16
- 150000002506 iron compounds Chemical class 0.000 claims abstract description 16
- 239000011276 wood tar Substances 0.000 claims abstract description 16
- 238000001354 calcination Methods 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 7
- 238000004065 wastewater treatment Methods 0.000 claims description 6
- 239000002028 Biomass Substances 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 239000010921 garden waste Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 238000000197 pyrolysis Methods 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 3
- 239000005751 Copper oxide Substances 0.000 claims description 2
- 241000196324 Embryophyta Species 0.000 claims description 2
- 150000001879 copper Chemical class 0.000 claims description 2
- 229910000431 copper oxide Inorganic materials 0.000 claims description 2
- 239000010902 straw Substances 0.000 claims description 2
- 238000009966 trimming Methods 0.000 claims description 2
- 239000005750 Copper hydroxide Substances 0.000 claims 1
- 229910001956 copper hydroxide Inorganic materials 0.000 claims 1
- 150000002505 iron Chemical class 0.000 claims 1
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 3
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000004506 ultrasonic cleaning Methods 0.000 description 4
- 229910021591 Copper(I) chloride Inorganic materials 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- -1 copper metal compounds Chemical class 0.000 description 2
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical compound [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002306 biochemical method Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- JJLJMEJHUUYSSY-UHFFFAOYSA-L copper(II) hydroxide Inorganic materials [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
Images
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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/80—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with zinc, cadmium or mercury
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/889—Manganese, technetium or rhenium
- B01J23/8892—Manganese
-
- B01J35/61—
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0018—Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/302—Treatment of water, waste water, or sewage by irradiation with microwaves
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
Abstract
The invention relates to preparation and application of a composite metal water treatment microwave advanced oxidation catalyst, belonging to the field of preparation of microwave catalysts. The method comprises the following steps: mixing the charcoal powder, an iron compound, a copper compound, a plurality of transition metals and wood tar to obtain a mixture, granulating the mixture, calcining the granulated material at high temperature, and ultrasonically cleaning to obtain the composite metal catalyst. The invention effectively improves the degradation rate of organic pollutants in water and the utilization rate of microwaves, and prepares the catalyst capable of strongly absorbing microwaves.
Description
Technical Field
The invention relates to a preparation method and application of a microwave catalyst, in particular to preparation and application of a composite metal water treatment microwave advanced oxidation catalyst.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
With the development of society, the variety and quantity of chemical pollutants in water are increasing day by day, the treatment of high-concentration organic wastewater becomes a difficult problem in the industry, and the wastewater contains many toxic organic pollutants which are difficult to biodegrade and cannot be used by the conventional biochemical method. At present, advanced oxidation methods such as ozone catalytic oxidation, photocatalytic oxidation, wet oxidation and the like are mainly adopted for treating high-concentration organic wastewater in the market, and the methods have advantages, but have defects, so that the popularization and the application of the methods are limited.
Compared with other sewage treatment processes, the microwave treatment process has the advantages of selective energy supply to substances, strong catalytic action on the absorbing substances, rapid temperature rise, uniform heating, energy conservation, high efficiency, no secondary pollution, killing of pathogens in water and the like, so that the microwave treatment process is more and more widely applied to the field of high-concentration organic wastewater treatment as a new process.
Regarding the principle of microwave advanced oxidation treatment of wastewater, most researchers believe that essentially microwaves first act on a catalyst or a carrier thereof, so that the catalyst or the carrier thereof is rapidly heated to generate active sites, and catalytic reaction is realized under microwave radiation, thereby achieving the purpose of treating organic wastewater.
Therefore, in order to improve the degradation rate of organic pollutants in water and the utilization rate of microwaves, the preparation of a catalyst capable of strongly absorbing microwaves becomes a research hotspot. However, the microwave catalyst in the current market has the defects of high manufacturing energy consumption, high raw material cost, complex process steps, short service life and the like.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a preparation method and application of a composite metal water treatment microwave advanced oxidation catalyst.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
in a first aspect of the invention, a preparation method of a composite metal water treatment microwave advanced oxidation catalyst is provided, which comprises the following steps:
mixing the charcoal powder, an iron compound, a copper compound, a transition metal and wood tar to obtain a mixture, and granulating, calcining and cleaning the mixture to obtain the composite metal catalyst.
The invention uses low-cost biochar and wood tar produced in the process of preparing the biochar as raw materials, the raw materials are mixed with an iron compound and a copper compound according to a certain proportion, a plurality of transition metals are used for granulation according to a certain specification, and then the composite metal catalyst is obtained by sintering under the condition of air isolation and ultrasonic cleaning. The catalyst prepared by the method has the advantages of high porosity, low cost and high efficiency.
The invention provides a composite metal microwave advanced oxidation catalyst for water treatment, which comprises the following raw materials in parts by weight: 20-40 parts of charcoal powder, 10-30 parts of iron compound, 10-30 parts of copper compound, 5-10 parts of transition metal and 10-20 parts of wood tar.
Through systematic research and grope, the prepared composite metal microwave catalyst has a highly developed pore structure, a huge specific surface area, good adsorption performance, abundant surface functional groups and strong microwave absorption capacity, realizes the balance of the adsorption performance and the microwave absorption capacity, and cannot influence the growth of the pore structure due to the addition of wave-absorbing particles.
In a third aspect of the invention, the application of the composite metal water treatment microwave advanced oxidation catalyst in wastewater treatment is provided.
The invention has better adsorption property and microwave absorption capability, so the invention is expected to be widely applied to wastewater treatment.
The invention has the beneficial effects that:
(1) the raw materials of the invention are biochar, iron and copper metal compounds and wood tar, wherein the biochar can provide a carrier for the iron and copper metal compounds, the three substances are stronger microwave absorbing materials, after the biochar is loaded on the carrier, the interaction can generate higher active point positions, and the wood tar is used as a biomass pyrolysis byproduct and is used as an adhesive for a catalyst to reduce the production cost.
(2) The preparation process is simple to operate, and the energy consumption in the treatment process is low.
(3) The composite metal microwave catalyst prepared by the invention has a highly developed pore structure, a huge specific surface area, good adsorption performance, abundant surface functional groups and strong microwave absorption capacity.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a flow chart of the preparation and application of a composite metal microwave advanced oxidation catalyst for water treatment according to the present invention;
FIG. 2 is an electron microscope image of the composite metal microwave catalyst obtained in example 1 of the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In a first aspect, a preparation method of a composite metal water treatment microwave advanced oxidation catalyst comprises the following steps: mixing the charcoal powder with iron compound, copper compound, various transition metals and wood tar to obtain a mixture, and finding out that: the combination of iron compounds, copper compounds, and various transition metals can enhance microwave absorption and generate stronger oxide groups. And granulating the mixture, calcining the granulated material at high temperature, and ultrasonically cleaning to obtain the composite metal catalyst.
In some embodiments of the present invention, the charcoal powder is obtained by pyrolysis activation of biomass raw materials such as crop straws and garden waste. Garden waste includes dead branches and fallen leaves, lawn trimmings, weeds, etc.
In some embodiments of the invention, the wood tar is obtained by cooling during pyrolysis activation of the biomass feedstock.
In some embodiments of the present invention, the average diameter of the charcoal powder is 50 to 60 μm. The invention uses low-cost charcoal powder and wood tar oil generated in the charcoal preparation process as raw materials, and compared with the existing microwave catalyst, the cost is saved by more than 20%.
The specific types of iron compounds, copper compounds, transition metals are not specified in this applicationBy way of limitation, in some embodiments of the invention, the iron compounds are iron oxides, hydroxides, and iron salts, primarily FeO, Fe2O3、Fe3O4、Fe(OH)2、FeCl3And the like. The copper compound is copper oxide, hydroxide, copper salt, mainly CuO, CuSO4、CuS、Cu(OH)2CuCl, and the like. In some embodiments of the present invention, the transition metal is Co, Mn, Ba, Ni, Zn, etc. to obtain better adsorption effect.
In some embodiments of the invention, the iron compound has an average diameter of 10 to 20 μm; preferably, the iron compound has an average diameter of 10 to 15 μm. In some embodiments of the invention, the copper compound has an average diameter of 10 to 20 μm; preferably, the copper compound has an average diameter of 10 to 15 μm. In some embodiments of the invention, the transition metal has an average diameter of 10 to 20 μm; preferably, the transition metal has an average diameter of 10 to 15 μm to obtain a more excellent microwave absorbing ability by a combination of the three.
In some embodiments of the present invention, the weight parts of each substance in the mixture are 10-30 parts of iron compound, 10-30 parts of copper compound, 20-40 parts of charcoal powder, 10-20 parts of wood tar and 5-10 parts of transition metal; preferably, the weight parts of the iron compound, the copper compound, the charcoal powder, the wood tar and the transition metal in the mixture are 20-30 parts, 30-40 parts, 10-15 parts and 5-10 parts, respectively. So as to effectively load elements such as iron, copper, transition metal and the like on the charcoal powder, and the catalyst has better adsorption performance and microwave absorption capacity.
In some embodiments of the invention, round pellets are obtained after granulation, the diameter of the round pellets being 1cm to increase the specific surface area.
In some embodiments of the invention, the high-temperature calcination temperature is 400-; preferably, the calcination condition is 400-500 ℃, the calcination time is 3-4 times, and the calcination time is 2-3 h. In the calcining process, all substances in the mixture are tightly bonded through wood tar, the mechanical strength is improved, and the porosity of the microwave catalyst is further enriched.
In some embodiments of the invention, the calcined catalyst is cleaned by ultrasonic cleaning to remove ash for use.
In a second aspect, the composite metal microwave catalyst obtained by the above preparation method.
In a third aspect, the composite metal microwave catalyst is applied to wastewater treatment.
In a fourth aspect, the method for treating wastewater by using the composite metal microwave catalyst comprises the following steps: directly mixing the catalyst with the wastewater, and performing microwave advanced oxidation wastewater treatment at normal temperature.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1:
the charcoal powder, FeO, CuO, Ba and Zn were sieved to obtain charcoal powder with a diameter of about 50 μm, CuO with a diameter of about 10 μm, and Ba and Zn with a diameter of about 10 μm. Accurately weighing 30kg of charcoal powder, 30kg of FeO, 20kg of CuO, 10kg of Ba, Zn and 10kg of wood tar, stirring and mixing, then granulating by an extrusion granulator to obtain circular particles with the diameter of 1cm, calcining the circular particles for 3 times under the anaerobic condition of 400 ℃, wherein the calcining time is 2 hours each time, then cooling by a water cooling sleeve, and finally removing ash by ultrasonic cleaning to obtain the composite metal microwave catalyst. The scanning electron micrograph of the obtained iron-carbon catalyst is shown in fig. 2.
Example 2
Mixing charcoal powder and Fe2O3Sieving CuCl, Mn and Ni to obtain charcoal powder with diameter of about 50 μm and Fe with diameter of about 10 μm2O3And CuCl, and Mn and Ni of about 10 μm in diameter. Accurately weighing 20kg of charcoal powder and 30kg of Fe2O3Stirring and mixing 30kgCuCl, 5kgMn, Ni and 15kg of wood tar, then granulating by an extrusion granulator to obtain round particles with the diameter of 1cm, calcining the round particles for 3 hours at 400 ℃ under anaerobic condition, cooling by a water cooling sleeve, and finally removing ash by ultrasonic cleaning to obtain the composite metal microwave catalyst.
Example 3
1g of the composite metal catalyst in the embodiment 1 is added into 100L of printing and dyeing wastewater with COD of 500mg/L, the microwave power is 20kW, the reaction is carried out for 3min at normal temperature, the COD of the wastewater is reduced to 100mg/L, and the removal rate of the COD reaches 80%.
Example 4
1g of the composite metal catalyst in the embodiment 2 is added into 100L of medical wastewater with COD of 2000mg/L, 1.5mL/L of hydrogen peroxide is added, the continuous operation is carried out for 25 days, the COD of the effluent is stabilized at 50mg/L, the treatment effect is stable, and the consumption rate of the composite metal catalyst is less than or equal to 3%/year, which shows that the composite metal catalyst has long operation time and stable treatment effect.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A preparation method of a composite metal water treatment microwave advanced oxidation catalyst is characterized by comprising the following steps:
mixing the charcoal powder, an iron compound, a copper compound, a transition metal and wood tar to obtain a mixture, and granulating, calcining and cleaning the mixture to obtain the composite metal catalyst.
2. The method for preparing the composite metal microwave advanced oxidation catalyst for water treatment according to claim 1, wherein the charcoal powder is obtained by pyrolysis activation of biomass raw material.
3. The method for preparing a composite metal microwave advanced oxidation catalyst for water treatment according to claim 2, wherein the biomass raw material is at least one of crop straws and garden waste.
4. The method for preparing the composite metal microwave advanced oxidation catalyst for water treatment according to claim 3, wherein the garden waste comprises dead branches and fallen leaves, lawn trimmings and weeds.
5. The method for preparing the composite metal microwave advanced oxidation catalyst for water treatment according to claim 1, wherein the iron compound is an oxide, a hydroxide or an iron salt of iron.
6. The method of claim 1, wherein the copper compound is selected from the group consisting of copper oxide, hydroxide, and copper salt.
7. The method for preparing the composite metal microwave advanced oxidation catalyst for water treatment according to claim 1, wherein the transition metal is at least one of Co, Mn, Ba, Ni and Zn.
8. The method for preparing the composite metal microwave advanced oxidation catalyst for water treatment according to claim 1, wherein the average diameter of the charcoal powder is 50-60 μm;
or the average diameter of the iron compound is 10-20 μm;
or the average diameter of the copper compound is 10-20 μm;
or the average diameter of the transition metal is 10 to 20 μm.
9. The composite metal microwave advanced oxidation catalyst for water treatment is characterized by comprising the following raw materials in parts by weight: 20-40 parts of charcoal powder, 10-30 parts of iron compound, 10-30 parts of copper compound, 5-10 parts of transition metal and 10-20 parts of wood tar.
10. The use of the composite metal microwave advanced oxidation catalyst for water treatment according to claim 9 in wastewater treatment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114715983A (en) * | 2022-05-03 | 2022-07-08 | 南京理工大学 | Method for promoting iron-carbon micro-electrolysis deep phosphorus removal by low current density |
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