CN115364860A - Preparation method and application of iron-based flaky nano catalyst - Google Patents
Preparation method and application of iron-based flaky nano catalyst Download PDFInfo
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- CN115364860A CN115364860A CN202111415286.6A CN202111415286A CN115364860A CN 115364860 A CN115364860 A CN 115364860A CN 202111415286 A CN202111415286 A CN 202111415286A CN 115364860 A CN115364860 A CN 115364860A
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- iron
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- nano catalyst
- flaky nano
- peroxymonosulfate
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 46
- 239000011943 nanocatalyst Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000010840 domestic wastewater Substances 0.000 claims abstract description 17
- 239000003814 drug Substances 0.000 claims abstract description 12
- 230000001590 oxidative effect Effects 0.000 claims abstract description 11
- 239000007800 oxidant agent Substances 0.000 claims abstract description 10
- 229940079593 drug Drugs 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000001354 calcination Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000002957 persistent organic pollutant Substances 0.000 claims description 7
- OKBMCNHOEMXPTM-UHFFFAOYSA-M potassium peroxymonosulfate Chemical compound [K+].OOS([O-])(=O)=O OKBMCNHOEMXPTM-UHFFFAOYSA-M 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 239000007833 carbon precursor Substances 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 231100000719 pollutant Toxicity 0.000 claims description 5
- 150000002505 iron Chemical class 0.000 claims description 4
- SZQUEWJRBJDHSM-UHFFFAOYSA-N iron(3+);trinitrate;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O SZQUEWJRBJDHSM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- FHHJDRFHHWUPDG-UHFFFAOYSA-L peroxysulfate(2-) Chemical class [O-]OS([O-])(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-L 0.000 claims description 4
- VHNQIURBCCNWDN-UHFFFAOYSA-N pyridine-2,6-diamine Chemical compound NC1=CC=CC(N)=N1 VHNQIURBCCNWDN-UHFFFAOYSA-N 0.000 claims description 4
- 239000012425 OXONE® Substances 0.000 claims description 3
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 3
- 239000003242 anti bacterial agent Substances 0.000 claims description 3
- 229940124599 anti-inflammatory drug Drugs 0.000 claims description 3
- 229940088710 antibiotic agent Drugs 0.000 claims description 3
- 239000002220 antihypertensive agent Substances 0.000 claims description 3
- 229940127088 antihypertensive drug Drugs 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- WJJMNDUMQPNECX-UHFFFAOYSA-N dipicolinic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=N1 WJJMNDUMQPNECX-UHFFFAOYSA-N 0.000 claims description 3
- NQXWGWZJXJUMQB-UHFFFAOYSA-K iron trichloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].Cl[Fe+]Cl NQXWGWZJXJUMQB-UHFFFAOYSA-K 0.000 claims description 3
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical class S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- UIQHHOMREHEPJX-UHFFFAOYSA-N pyridine-3,4,5-triamine Chemical compound NC1=CN=CC(N)=C1N UIQHHOMREHEPJX-UHFFFAOYSA-N 0.000 claims description 3
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 2
- LFINSDKRYHNMRB-UHFFFAOYSA-N diazanium;oxido sulfate Chemical compound [NH4+].[NH4+].[O-]OS([O-])(=O)=O LFINSDKRYHNMRB-UHFFFAOYSA-N 0.000 claims description 2
- YMGGAHMANIOXGP-UHFFFAOYSA-L disodium;oxido sulfate Chemical compound [Na+].[Na+].[O-]OS([O-])(=O)=O YMGGAHMANIOXGP-UHFFFAOYSA-L 0.000 claims description 2
- VXWSFRMTBJZULV-UHFFFAOYSA-H iron(3+) sulfate hydrate Chemical compound O.[Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O VXWSFRMTBJZULV-UHFFFAOYSA-H 0.000 claims description 2
- 230000001107 psychogenic effect Effects 0.000 claims description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 abstract description 23
- 238000006243 chemical reaction Methods 0.000 abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 230000003197 catalytic effect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 3
- 230000006978 adaptation Effects 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 3
- 238000006065 biodegradation reaction Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- FFGPTBGBLSHEPO-UHFFFAOYSA-N carbamazepine Chemical compound C1=CC2=CC=CC=C2N(C(=O)N)C2=CC=CC=C21 FFGPTBGBLSHEPO-UHFFFAOYSA-N 0.000 description 2
- 229960000623 carbamazepine Drugs 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- DCOPUUMXTXDBNB-UHFFFAOYSA-N diclofenac Chemical compound OC(=O)CC1=CC=CC=C1NC1=C(Cl)C=CC=C1Cl DCOPUUMXTXDBNB-UHFFFAOYSA-N 0.000 description 2
- 229960001259 diclofenac Drugs 0.000 description 2
- -1 iron ions Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229960005404 sulfamethoxazole Drugs 0.000 description 2
- JLKIGFTWXXRPMT-UHFFFAOYSA-N sulphamethoxazole Chemical compound O1C(C)=CC(NS(=O)(=O)C=2C=CC(N)=CC=2)=N1 JLKIGFTWXXRPMT-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940044631 ferric chloride hexahydrate Drugs 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 231100000683 possible toxicity Toxicity 0.000 description 1
- 229940001470 psychoactive drug Drugs 0.000 description 1
- 239000004089 psychotropic agent Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001878 scanning electron micrograph 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
- 238000001179 sorption measurement Methods 0.000 description 1
- GECHUMIMRBOMGK-UHFFFAOYSA-N sulfapyridine Chemical compound C1=CC(N)=CC=C1S(=O)(=O)NC1=CC=CC=N1 GECHUMIMRBOMGK-UHFFFAOYSA-N 0.000 description 1
- 229960002211 sulfapyridine Drugs 0.000 description 1
- 238000004065 wastewater treatment 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
- 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
- B01J23/74—Iron group metals
- B01J23/745—Iron
-
- 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
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- 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
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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- 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
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
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Abstract
The invention provides a preparation method and application of an iron-based flaky nano catalyst. The invention has simple preparation, stable catalyst and mild reaction condition, and can efficiently activate the oxidant to generate active oxygen species under the condition that the pH =2-9, thereby realizing the complete removal of the drugs and personal care products (PPCPs) in the domestic wastewater. The invention overcomes the defects of low catalytic efficiency, poor removal effect, narrow pH adaptation reaction and the like of the catalyst in the prior advanced oxidation technology, is environment-friendly, has no pollution to water body environment, simple operation and low input cost, provides a new idea for green and high-efficiency treatment of PPCPs in domestic wastewater, and has great practical application prospect.
Description
Technical Field
The invention relates to a preparation method of a catalyst, in particular to a preparation method and application of an iron-based flaky nano catalyst, belonging to the field of chemistry and wastewater treatment.
Background
Pharmaceuticals and Personal Care Products (PPCPs) are a typical synthetic drug that is frequently detected in water and are of increasing interest due to their low biodegradability and potential toxicity. Because of the characteristics of low content (generally in ng/L-mu g/L), biological accumulation, long-term harmfulness, difficult biodegradation and the like, the biological additive causes potential harm to the ecological environment and human health. Therefore, how to efficiently remove PPCPs in domestic wastewater is a difficult point and a hot point for domestic and foreign water treatment.
At present, the commonly used methods for treating organic pollutants in water environment mainly comprise a physical adsorption method, a membrane separation method, a biodegradation method and the like. Although these conventional water treatment technologies can remove antibiotics to a certain extent, there are disadvantages of low removal efficiency, need of additional energy input, and complex operation, and the treatment of polluted water bodies of actual medicines and personal care products is limited.
With the continuous update and improvement of water treatment technology, advanced oxidation technology has become one of the most widely used treatment means at present. The advanced oxidation technology is that a catalyst and an oxidant are added into a water body to be treated, the catalyst catalyzes the oxidant to react to generate active species with extremely strong oxidizing capability, and the active species directly oxidize pollutants, so that organic pollutants are degraded into micromolecules with low toxicity and easy biodegradation, and even directly mineralized into inorganic matters, and the effect of thoroughly removing the pollutants is achieved. As disclosed in publication No.: CN110075845A 'iron-based catalyst for strengthening ozone oxidation of organic pollutants and preparation method thereof' discloses an iron-based catalyst for strengthening ozone oxidation of organic pollutants, which can efficiently catalyze ozone to oxidize refractory organic pollutants under the condition of low ozone concentration, and realize the removal of refractory organic matters. Publication No.: CN108585163B, "a method for catalyzing monopersulfate to generate sulfate radical to degrade organic matter", discloses a copper-loaded molecular sieve catalyst and a water treatment method for catalyzing monopersulfate to generate high-activity sulfate radical, wherein the catalyst can activate monopersulfate to realize high-efficiency removal of sulfapyridine. Although the catalyst can effectively activate an oxidant to generate active red to thoroughly remove pollutants, the defects of low catalytic activity, narrow pH adaptation range, complex catalyst preparation and the like still exist, and the catalyst is difficult to be used for PPCPs treatment in actual domestic wastewater.
Disclosure of Invention
The invention provides a preparation method and application of an iron-based flaky nano catalyst, aiming at solving the defects of low catalytic efficiency, secondary pollution to the environment, narrow pH application range and the like of the catalyst in the existing advanced oxidation technology for treating domestic wastewater. Has great practical application prospect.
The invention adopts the technical scheme that the catalyst solves the problems of the catalyst in the prior advanced oxidation technology:
a preparation method of an iron-based flaky nano catalyst comprises the following specific steps:
(1) Mixing and grinding iron salt and a carbon precursor according to a molar ratio of 1-10;
(2) Transferring the powder obtained in the step 1) into a combustion boat, calcining the powder in a tube furnace to 600-900 ℃ under the protection of nitrogen, preserving the heat for 2-4 hours, and naturally cooling the powder to room temperature to obtain the iron-based flaky nano catalyst.
The carbon grows on the surfaces of the iron-based particles in situ by a calcination method, so that the active center can be fixed, the iron-based particles are embedded in a carbon layer, the overflow of iron ions can be effectively inhibited, and the catalyst can continuously show stable and efficient catalytic activity.
The ferric salt is one or more of ferric chloride hexahydrate, ferric nitrate nonahydrate and ferric sulfate hydrate.
The carbon precursor is one or more of 2, 6-diaminopyridine, 3,4, 5-triaminopyridine, and 2, 6-dicarboxylpyridine.
Preferably, the molar ratio of the iron salt to the carbon precursor is 2-6.
Preferably, the calcination temperature is 700-1000 ℃, so that the prepared iron-based flaky nano-catalyst has high and stable catalytic activity.
An application of an iron-based flaky nano catalyst is applicable to a preparation method of the iron-based flaky nano catalyst, and is characterized in that: adding 1-2000mg/L iron-based flaky nano catalyst and 0.5-1000mg/L oxidant into domestic wastewater, stirring, reacting at 20-90 deg.C and pH of 2-9 for 6-20min to remove drug and personal care products (PPCPs) in wastewater with pollutant concentration of 0.001-100 μ g/L.
The oxidant is one or more of persulfate and peroxymonosulfate, wherein the persulfate is one or more of sodium persulfate, potassium persulfate and ammonium persulfate, and the peroxymonosulfate is one or more of sodium peroxymonosulfate, potassium peroxymonosulfate or ammonium peroxymonosulfate.
The organic pollutants in the domestic wastewater are one or more of antibiotics, anti-inflammatory drugs, antihypertensive drugs or psychogenic drugs.
Preferably, the dosage of the iron-based flaky nano catalyst is 5-1000mg/L, and the dosage of the oxidant is preferably 2-500mg/L, so that the dosage of the iron-based flaky nano catalyst and the dosage of the oxidant are within the range, and the PPCPs in the domestic wastewater can be efficiently degraded.
Preferably, the concentration of the PPCPs in the domestic wastewater is 0.005-50 mu g/L, and the PPCPs in the domestic wastewater can be effectively degraded under the concentration.
Preferably, the reaction temperature is removed at 20-80 ℃ and the reaction pH is 3-9.
The invention has the beneficial effects that:
(1) The catalyst is simple to prepare and low in cost;
(2) The reaction condition is mild, the PPCPs in the domestic wastewater can be quickly and efficiently treated by reacting for 30 minutes at the temperature of 10-100 ℃ without the conditions of ultrasonic illumination, heating and the like;
(3) The pH application range is wide and the catalytic activity is high;
(4) The catalyst has good reusability;
(5) The catalyst is stable, the iron ion overflow amount in the reaction process is lower than the national standard, and the secondary pollution to the environment is avoided.
Drawings
Fig. 1 is an SEM image of the catalyst prepared according to the present invention.
FIG. 2 is a graph showing the effect of the catalyst prepared by the present invention on the degradation of carbamazepine by activating potassium peroxymonosulfate.
FIG. 3 is a diagram showing the effect of the catalyst prepared by the invention on activating potassium persulfate to degrade sulfamethoxazole.
FIG. 4 is a graph showing the effect of the catalyst prepared by the present invention on the degradation of diclofenac by activating ammonium persulfate.
Detailed Description
The invention is further illustrated by the following examples. These embodiments are merely illustrative and are not intended to limit the scope of the present invention. In addition, after reading the teaching of the present invention, those skilled in the art can make various changes or modifications to the invention, and these equivalents also fall within the scope of the claims appended to the present application.
Example 1
Preparation of an iron-based flaky nano catalyst:
(1) Mixing ferric trichloride hexahydrate and 2, 6-diaminopyridine in a molar ratio of 4;
(2) Transferring the powder obtained in the step 1) into a combustion boat, calcining the powder in a tube furnace to 900 ℃ under the protection of nitrogen, preserving the temperature for 4 hours, and naturally cooling the powder to room temperature to obtain the iron-based flaky nano catalyst.
An application of an iron-based flaky nano catalyst is applicable to a preparation method of the iron-based flaky nano catalyst, the iron-based flaky nano catalyst with a dosage of 20mg/L and potassium hydrogen peroxymonosulfate with a concentration of 50mg/L are added into domestic wastewater, the reaction temperature is 30 ℃, the pH value is 6, the reaction is carried out for 6min, and drugs and personal care products (PPCPs) in the wastewater with antibiotic (carbamazepine) concentration of 20 mug/L are removed, and the result is shown in figure 2.
Example 2
Preparation of an iron-based flaky nano catalyst:
(1) Mixing and grinding ferric nitrate nonahydrate and 2, 6-dicarboxylpyridine according to a molar ratio of 6;
(2) Transferring the powder obtained in the step 1) into a combustion boat, calcining the powder in a tube furnace to 800 ℃ under the protection of argon, preserving the temperature for 3 hours, and naturally cooling the powder to room temperature to obtain the iron-based flaky nano catalyst.
An application of an iron-based flaky nano catalyst is applicable to a preparation method of the iron-based flaky nano catalyst, the iron-based flaky nano catalyst with the dosage of 500mg/L and potassium hydrogen peroxymonosulfate with the concentration of 500mg/L are added into domestic wastewater, the reaction temperature is 40 ℃, the pH value is 7, the reaction is carried out for 10min, and drugs and personal care products (PPCPs) in the wastewater with the concentration of 50 mu g/L of anti-inflammatory drugs (sulfamethoxazole) are removed, and the result is shown in figure 3.
Example 3
Preparation of an iron-based flaky nano catalyst:
(1) Mixing and grinding ferric nitrate nonahydrate and 2, 6-diaminopyridine in a molar ratio of 8;
(2) And (2) transferring the powder obtained in the step (1) into a combustion boat, calcining the powder in a tube furnace to 1000 ℃ under the protection of argon, preserving the temperature for 2 hours, and naturally cooling the powder to room temperature to obtain the iron-based flaky nano catalyst.
An application of an iron-based flaky nano catalyst is applicable to a preparation method of the iron-based flaky nano catalyst, wherein the iron-based flaky nano catalyst with the dosage of 800mg/L and potassium hydrogen peroxymonosulfate with the concentration of 600mg/L are added into domestic wastewater, the reaction temperature is 10 ℃, the pH value is 9, the reaction time is 15min, drugs and personal care products (PPCPs) in the wastewater with the concentration of 100 mug/L of antihypertensive drugs are removed, and the result is similar to that shown in figure 3.
Example 4
Preparation of an iron-based flaky nano catalyst:
(1) Mixing and grinding ferric sulfate and 3,4, 5-triaminopyridine according to a molar ratio of 10;
(2) And (2) transferring the powder obtained in the step (1) to a combustion boat, calcining the powder in a tube furnace to 700 ℃ under the protection of nitrogen, preserving the temperature for 4 hours, and naturally cooling the powder to room temperature to obtain the iron-based flaky nano catalyst.
An application of an iron-based flaky nano catalyst is applicable to a preparation method of the iron-based flaky nano catalyst, wherein the iron-based flaky nano catalyst with a dosage of 1000mg/L and potassium hydrogen peroxymonosulfate with a concentration of 800mg/L are added into domestic wastewater, the reaction temperature is 10 ℃, the pH value is 9, the reaction time is 20min, and drugs and personal care products (PPCPs) in the wastewater with a concentration of 100 mug/L of psychotropic drugs (diclofenac) are removed, and the result is shown in figure 4.
Claims (5)
1. The preparation method of the iron-based flaky nano catalyst is characterized by comprising the following steps of:
(1) Mixing and grinding iron salt and a carbon precursor according to a molar ratio of 2-10; the carbon precursor is one or more of 2, 6-diaminopyridine, 3,4, 5-triaminopyridine and 2, 6-dicarboxylpyridine;
(2) And (2) transferring the powder obtained in the step (1) to a combustion boat, calcining the powder in a tube furnace to 600-1000 ℃ under the protection of nitrogen or argon, preserving the heat for 2-4 hours, and naturally cooling the powder to room temperature to obtain the iron-based flaky nano catalyst.
2. The method for preparing the iron-based flaky nano catalyst of claim 1, wherein the iron salt is one or more of ferric trichloride hexahydrate, ferric nitrate nonahydrate, or ferric sulfate hydrate.
3. Use of an iron-based plate-like nanocatalyst prepared according to claims 1-2, characterized in that: adding 1-2000mg/L iron-based flaky nano catalyst and 0.5-1000mg/L oxidant into domestic wastewater, stirring, reacting at 20-90 deg.C and pH of 2-9 for 6-30min, and removing medicine and personal care product in wastewater with pollutant concentration of 0.001-100 μ g/L.
4. The use of the iron-based plate-like nanocatalyst according to claim 3, wherein the oxidant is one or more of a persulfate salt or one or more of sodium persulfate, potassium persulfate or ammonium persulfate, or a peroxymonosulfate salt, wherein the peroxymonosulfate salt is one or more of sodium peroxymonosulfate, potassium peroxymonosulfate or ammonium peroxymonosulfate.
5. The use of the iron-based plate-like nanocatalyst as claimed in claim 3, wherein the organic pollutants in the domestic wastewater are one or more of antibiotics, anti-inflammatory drugs, antihypertensive drugs or psychogenic drugs.
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