CN113998798A - Method for degrading antibiotic wastewater by catalyzing peroxymonosulfate to oxidize - Google Patents
Method for degrading antibiotic wastewater by catalyzing peroxymonosulfate to oxidize Download PDFInfo
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- 230000003115 biocidal effect Effects 0.000 title claims abstract description 43
- FHHJDRFHHWUPDG-UHFFFAOYSA-L peroxysulfate(2-) Chemical compound [O-]OS([O-])(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-L 0.000 title claims abstract description 43
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000000593 degrading effect Effects 0.000 title claims abstract description 9
- 239000003054 catalyst Substances 0.000 claims abstract description 34
- 229910052951 chalcopyrite Inorganic materials 0.000 claims abstract description 23
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 18
- 230000003647 oxidation Effects 0.000 claims abstract description 17
- 238000006731 degradation reaction Methods 0.000 claims abstract description 13
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- 238000010525 oxidative degradation reaction Methods 0.000 claims description 16
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- 239000000243 solution Substances 0.000 description 16
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- 229940088710 antibiotic agent Drugs 0.000 description 10
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 9
- 229910001447 ferric ion Inorganic materials 0.000 description 7
- 238000003760 magnetic stirring Methods 0.000 description 7
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- 230000000052 comparative effect Effects 0.000 description 6
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- 238000004811 liquid chromatography Methods 0.000 description 6
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- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
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- 230000036541 health Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- CTAPFRYPJLPFDF-UHFFFAOYSA-N isoxazole Chemical compound C=1C=NOC=1 CTAPFRYPJLPFDF-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- OKBMCNHOEMXPTM-UHFFFAOYSA-M potassium peroxymonosulfate Chemical compound [K+].OOS([O-])(=O)=O OKBMCNHOEMXPTM-UHFFFAOYSA-M 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 150000004763 sulfides Chemical class 0.000 description 2
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- 230000002195 synergetic effect Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- VCUVETGKTILCLC-UHFFFAOYSA-N 5,5-dimethyl-1-pyrroline N-oxide Chemical compound CC1(C)CCC=[N+]1[O-] VCUVETGKTILCLC-UHFFFAOYSA-N 0.000 description 1
- 238000004435 EPR spectroscopy Methods 0.000 description 1
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
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- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
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- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
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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
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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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
- 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
- C02F2101/34—Organic compounds containing oxygen
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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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
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Abstract
The invention belongs to the technical field of antibiotic wastewater treatment, and particularly relates to a method for degrading antibiotic wastewater by catalyzing peroxymonosulfate through oxidation2) The catalyst is prepared by carrying out catalytic oxidation degradation treatment on the antibiotic wastewater by using peroxymonosulfate. The chalcopyrite is used as a natural mineral, has wide source, and does not need any pretreatment except for refining the grain diameter. Therefore, the catalyst is environment-friendly and low in cost. Although the removal rate is lower than that of the strong acid in a weak acidic environment, the high-efficiency removal effect can be achieved by prolonging the reaction time, so that the step of using a large amount of acid is omitted. For the antibiotic wastewater with the same concentration, the removal speed is far higher than that of the group of the iron minerals and PMS commonly used at presentAnd (6) mixing. The heterogeneous catalyst is easy to recover, and does not require continuous addition of Fe as in the Fenton reaction2+Therefore, the running cost can be greatly saved.
Description
Technical Field
The invention belongs to the technical field of antibiotic wastewater treatment, and particularly relates to a method for degrading antibiotic wastewater by catalyzing peroxymonosulfate through oxidation.
Background
The medicines and personal care products (PPCPs) are novel micro-pollutants and have the characteristics of various types, large production and consumption amount, wide range of environment and the like. There is a wide range of concern due to their potential environmental toxicological effects and the potential for human health risks. Antibiotics account for a considerable proportion of recent years in the detection of environmental micropollutants. Although the contribution of antibiotics to human development is undoubted, the biological degradability and the existence of drug-resistant genes seriously threaten human health and ecological safety through the cumulative effect of the environment. Wherein, sewage treatment plant is the intersection of human production, domestic sewage, also is the repository of antibiotic. However, the existing sewage treatment plants are difficult to completely remove antibiotics, so that a large amount of antibiotics are released into the environment and become a new pollutant which is widely concerned at home and abroad. Therefore, the development of a control technology for antibiotics in wastewater is one of the research hotspots and leading-edge subjects in the field of environmental science at present.
Advanced oxidation technology, by virtue of its high redox potential of free radicals, provides a practical approach to the treatment of refractory organic pollutants. Taking the traditional Fenton reaction with ferrous ions as a catalyst and hydrogen peroxide as an oxidant as an example, OH released by the Fenton reaction can mineralize pollutants to further remove the pollutants. Compared with other advanced oxidation technologies (such as Fenton-like method, ozone-like advanced oxidation method, photocatalytic oxidation technology and the like), the Fenton oxidation method has the advantages of mild reaction conditions, simple process, high treatment efficiency and the like. Among them, the advanced oxidation technology of generating sulfate radicals by activating Peroxymonosulfate (PMS) has received wide attention. However,there are also certain limitations to the utility of this process, including harsh pH conditions (pH)<3, strong acidity) and Fe3+Difficult to reduce into Fe2+The continuous consumption of ferrous ions and the precipitation of ferric ions caused by the continuous consumption of ferrous ions lead to the increase of cost and serious secondary pollution. Therefore, the search for an efficient reducing agent is important to solve the above problems. Homogeneous phase reducing agents such as hydroxylamine, tea polyphenol and the like can solve the problem that ferric iron is difficult to reduce, but new impurities can be introduced to cause secondary pollution. In recent years, it has been found that metal sulfides can accelerate the reduction of ferric iron in Fenton reaction, and the application of the metal sulfides in Fe2+In the PMS system, the iron circulation is also realized. However, the problem of narrow pH application has not been effectively solved, despite the small number of sulfides (e.g., MoS)2) Can be catalyzed under neutral conditions, but its wide range of applications requires large amounts of iron salts, resulting in higher costs. Therefore, a new heterogeneous catalyst needs to be developed, and the efficient activation of PMS can be realized without adding an iron salt and a large amount of acid regulating reagents, so that antibiotic pollutants are degraded.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for degrading antibiotic wastewater by catalyzing peroxymonosulfate through oxidation, which utilizes a natural chalcopyrite heterogeneous catalyst CuFeS2Activating the generated high-activity free radicals to realize high-efficiency removal of antibiotics. Meanwhile, the heterogeneous catalyst greatly saves the cost, and Fe does not need to be continuously added like the Fenton reaction2+Namely, the catalyst can still normally play a catalytic role even under a weak acid condition.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a method for degrading antibiotic wastewater by catalyzing peroxymonosulfate to oxidize, which comprises the following steps: with CuFeS2The catalyst is prepared by carrying out catalytic degradation treatment on the antibiotic wastewater by using peroxymonosulfate.
Transition metal Fe2+Self-activating PMS can generate high-activity hydroxyl free radical and sulfate free radical, while Fe3+Reduction to Fe2+This reversible reaction is difficultThis was achieved, resulting in a stagnation of the reaction. At present, the recycling of iron ions is mainly realized by the reduction of sulfides through the concerted catalysis of metal sulfides and iron ions. However, this method is suitable for use with a narrow pH and requires the input of large amounts of iron salt. The invention adopts chalcopyrite-CuFeS2As a catalyst, on the one hand as a slow release source of ferrous ions and on the other hand as Fe3+The reducing agent of (1). With the aid of Cu+/Cu2+Electron transfer of (2) to effect Fe3+/Fe2+In addition, the conversion of S involved therein also contributes to Fe3+Reduction of (2). Once the ferrous ions are released, they can react with PMS to generate Fe3+Is reduced, so that the detention time of iron ions in the solution is greatly reduced, the pH condition is further alleviated, the catalytic reaction can be carried out under the weak acid condition, and continuous additional Fe is not required2+。
Preferably, the CuFeS2The addition amount of (b) is 0.25g/L-2 g/L.
Preferably, the pH of the antibiotic wastewater is 3 to 7.
Preferably, the concentration of the peroxymonosulfate salt is 0.5 mmol/L.
Preferably, the antibiotic comprises sulfisoxazole. Of course, the invention is also applicable to the removal of other antibiotics, such as
Preferably, the concentration of the antibiotics in the antibiotic wastewater is not more than 5 mg/L. Theoretically, antibiotic concentrations greater than 5mg/L are also suitable for use in the present invention, except that the CuFeS concentration needs to be adjusted accordingly2And the amount of peroxymonosulfate, and the time of degradation.
Preferably, the time for catalytic degradation is not less than 10 min.
The invention also provides a reagent for oxidizing and degrading antibiotic wastewater, which comprises CuFeS2And a salt of peroxymonosulfate.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a method for degrading antibiotic wastewater by catalyzing peroxymonosulfate through oxidation, which uses CuFeS2Using peroxymonosulfate as catalyst to treat antibiotic wasteAnd (5) carrying out catalytic degradation treatment on the water. Wherein, CuFeS2As a natural mineral, the catalyst is extremely wide in source, and does not need any post-treatment except for thinning the particle size, so that the catalyst is environment-friendly and low in cost. Although the removal rate is lower than that of the strong acid in a weak acidic environment, the high-efficiency removal effect can be achieved by prolonging the reaction time, so that the step of using a large amount of acid is omitted. For antibiotic wastewater with the same concentration, the treatment effect is far better than the combination of general iron minerals and PMS, and the catalyst is used as a heterogeneous catalyst and is easy to recover. In addition, the heterogeneous catalyst greatly saves the cost, the retention time of iron ions in the solution is short, and once ferrous ions are released, the iron ions immediately react with PMS, so that Fe does not need to be continuously added in a Fenton reaction2+. Therefore, the method can realize the high-efficiency activation of PMS without adding iron salt and a large amount of acid regulating reagent, and further can efficiently remove antibiotics in the antibiotic wastewater.
Drawings
FIG. 1 is CuFeS2The catalyst has the treatment effect on the wastewater containing the sulfonamide isoxazole;
FIG. 2 is CuFeS2Electron spin resonance spectrum of catalytic reaction of catalyst;
FIG. 3 is CuFeS2The catalyst has the treatment effect on the wastewater containing the sulfonamide isoxazole antibiotics under different addition amounts;
FIG. 4 is CuFeS2The catalyst has the treatment effect on the wastewater containing the sulfisoxazole antibiotic under the conditions of different pH values.
Detailed Description
The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The experimental procedures in the following examples were carried out by conventional methods unless otherwise specified, and the test materials used in the following examples were commercially available by conventional methods unless otherwise specified.
Example 1CuFeS2Catalyst and PMS (synergistic) have adsorption oxidation removal effect on sulfaisoxazole antibiotic wastewater
(1)CuFeS2Preparation of the catalyst: crushing a natural mineral chalcopyrite (block) under the action of a ball mill, and sieving by a 100-mesh sieve for refining; then under magnetic stirring (200 revolutions per minute), soaking the chalcopyrite fine powder for 30 minutes by using nitric acid with the concentration of 0.1mol/L, washing the chalcopyrite fine powder for three times by using deionized water, and drying the chalcopyrite fine powder in vacuum to obtain the catalyst.
(2) Preparation of PMS stock solution: weighing 7.7g of potassium peroxymonosulfate composite salt, placing the potassium peroxymonosulfate composite salt in 50mL of deionized water, and stirring for 0.5h to obtain PMS stock solution with the concentration of 0.5 mol/L.
(3) 0.05g of catalyst was weighed into 50mL of a sulfisoxazole (5mg/L) solution containing 0.5mmol/LPMS under magnetic stirring (400 rpm) to start the degradation reaction. At a particular point in the reaction, 1mL was sampled by syringe, filtered through a 0.22 μm PTE filter and placed in a 2mL liquid chromatography sample vial, and then 50 μ L of methanol was added rapidly to prevent further oxidative degradation of the sulfoamine isoxazole. The residual sulfisoxazole concentration was then analyzed by high performance liquid chromatography (Agilent1260InfinityII) using 0.1% formic acid solution and methanol as mobile phase.
When the ratio of the catalyst is 0.5mmol/LPMS and 1g/L CuFeS2When the system is added, the oxidation effect of PMS on sulfisoxazole in the embodiment is shown in figure 1, and after reacting for 15 minutes, the removal rate of sulfisoxazole with the initial concentration of 5mg/L is 99.5%.
(4) Reactive oxygen species detection
In the presence of 0.5mmol/LPMS oxidant and 1g/L catalyst CuFeS2Under the conditions, samples were taken after 5 minutes and 10 minutes of reaction, and a radical scavenger 5, 5-dimethyl-1-pyrroline-N-oxide (DMPO) was added and the generation of radicals was analyzed using an electron spin resonance spectrometer. As shown in fig. 2, the electron spin resonance spectrum shows signals of hydroxyl radicals and sulfate radicals, and the intensity of the signals increases with the extension of the reaction time. This result demonstrates that hydroxyl radicals and sulfate radicals are simultaneously generated during the catalytic reactionThese radicals together bring about the oxidative degradation of sulfisoxazole.
Example 2CuFeS2Treatment effect of catalyst on sulfaisoxazole antibiotic wastewater under different adding amounts
Under magnetic stirring, 0.0125g, 0.025g, 0.05g and 0.1g of CuFeS were weighed respectively2The catalyst is added into 50mL of sulfisoxazole (5mg/L) solution containing 0.5mmol/LPMS to start degradation reaction, and the corresponding catalyst concentrations are 0.25g/L, 0.5g/L, 1g/L and 2g/L respectively. At a specific time point of the reaction, 1mL of the mixture is sampled by a syringe, filtered by a 0.22-micron PTFE filter membrane and placed in a 2mL liquid chromatography sample bottle, and then 50 μ L of methanol is rapidly added to prevent further oxidative degradation of the sulfisoxazole. The residual sulfisoxazole concentration was then analyzed by high performance liquid chromatography (Agilent1260InfinityII) using 0.1% formic acid solution and methanol as mobile phase.
Under the conditions of 0.5mmol/LPMS oxidant and 5mg/L sulfisoxazole, the treatment effect of different adding amounts of the catalyst in the embodiment on the antibiotic wastewater is shown in figure 3, and when the concentrations are respectively 2g/L, 1g/L and 0.5g/L, the complete removal of the sulfisoxazole can be realized in 10min, 15min and 30 min. Whereas a catalyst concentration of 0.25g/L only achieved 72.7% removal within 30 min.
Example 3CuFeS2Oxidative degradation effect of catalyst on sulfaisoxazole antibiotic wastewater under different pH conditions
Before adding the catalyst, 0.1mol/L NaOH or H is used2SO4Adjusting pH of the sulfisoxazole solution (5mg/L) containing 0.5mmol/LPMS to 3, 4, 5.5 and 7 respectively, and then weighing 0.05g of CuFeS under magnetic stirring2The catalysts are respectively added into solutions with different pH values to start oxidative degradation reaction. At a particular point in the reaction, 1mL was sampled with a syringe, filtered through a 0.22 μm PTEF filter, placed in a 2mL liquid chromatography sample vial, and then 50 μ L of methanol was quickly added to prevent further oxidative degradation of sulfisoxazole. The residual sulfisoxazole concentration was then analyzed by high performance liquid chromatography (Agilent1260InfinityII) using 0.1% formic acid solution and methanol as mobile phase.
Under the conditions of 1g/L of catalyst, 0.5mmol/L of PMS and 5mg/L of sulfisoxazole, the degradation effects corresponding to different initial pH values are shown in figure 4, and when the pH is 3 or 4, the complete removal of the sulfisoxazole can be realized within 15 min; when the pH value is 5.5, 100 percent of removal can be realized by prolonging the reaction for 30 min; at pH 7, the removal rate was 70.4%, although the removal rate was significantly decreased.
COMPARATIVE EXAMPLE 1 chalcopyrite heterogeneous catalyst (CuFeS)2) Adsorption removal effect on sulfaisoxazole antibiotic wastewater
Under magnetic stirring, 0.05g of CuFeS is weighed2The degradation reaction was started by adding to 50mL of a solution of sulfisoxazole (5 mg/L). At a particular point in the reaction, 1mL was sampled by syringe, filtered through a 0.22 μm PTEF filter, placed in a 2mL liquid chromatography sample vial, and then 50 μ L of methanol was added rapidly to prevent further oxidative degradation of sulfisoxazole. The residual sulfisoxazole concentration was then analyzed by high performance liquid chromatography (Agilent1260InfinityII) using 0.1% formic acid solution and methanol as mobile phase.
At 1g/L catalyst CuFeS2The adsorption effect of the catalyst on sulfisoxazole in the comparative example is shown in fig. 1, and after 30 minutes of reaction, the removal rate of sulfisoxazole with the initial concentration of 5mg/L is less than 1%.
Comparative example 2 effect of removing by oxidation PMS Sulfanoxazole antibiotic wastewater
Under the magnetic stirring, 50 mu LPMS stock solution is transferred and added into 50mL sulfisoxazole (5mg/L) solution to start the degradation reaction, and the concentration of PMS is 0.5 mmol/L. At a particular point in the reaction, 1mL was sampled by syringe, filtered through a 0.22 μm PTE filter and placed in a 2mL liquid chromatography sample vial, and then 10 μ L sodium thiosulfate (0.5 mol/L concentration) was added rapidly to prevent further oxidative degradation of sulfisoxazole. The residual sulfisoxazole concentration was then analyzed by high performance liquid chromatography (Agilent1260InfinityII) using 0.1% formic acid solution and methanol as mobile phases.
When the concentration of PMS is 0.5mmol/L, the oxidation effect of PMS on sulfisoxazole in the comparative example is shown in figure 1, and after reacting for 30 minutes, the removal rate of sulfisoxazole with the initial concentration of 5mg/L is 35.2%.
Comparative example 3 Magnetite (Fe)3O4) Catalyst and PMS (synergistic) have adsorption oxidation removal effect on sulfaisoxazole antibiotic wastewater
Under magnetic stirring, 0.05g of magnetite (Fe) is weighed out3O4) The degradation reaction was started by adding to 50mL of a sulfisoxazole (5mg/L) solution containing 0.5 mmol/LPMS. At a particular point in the reaction, 1mL was sampled with a syringe, filtered through a 0.22 μm ptfe filter and placed in a 2mL liquid chromatography sample vial, and then 50 μ L of methanol was rapidly added to prevent further oxidative degradation of the sulfisoxazole. The residual sulfisoxazole concentration was then analyzed by high performance liquid chromatography (Agilent1260InfinityII) using 0.1% formic acid solution and methanol as mobile phase.
When the ratio of the catalyst to the solution is 0.5mmol/LPMS and 1g/L Fe3O4When the system is added at the same time, the oxidation effect of PMS p-sulfisoxazole in the comparative example is shown in figure 1, and after the reaction is carried out for 15 minutes, the removal rate of sulfisoxazole with the initial concentration of 5mg/L is only 27.2%.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (8)
1. A method for degrading antibiotic wastewater by catalyzing peroxymonosulfate through oxidation is characterized in that CuFeS is used2The catalyst is prepared by carrying out catalytic degradation treatment on the antibiotic wastewater by using peroxymonosulfate.
2. The method for catalyzing the oxidative degradation of antibiotic wastewater by peroxymonosulfate as claimed in claim 1, wherein the CuFeS is2The addition amount of (b) is 0.25g/L-2 g/L.
3. The method for catalyzing the oxidative degradation of antibiotic wastewater by peroxymonosulfate according to claim 1, wherein the antibiotic wastewater has a pH of 3-7.
4. The method for catalyzing the oxidative degradation of antibiotic wastewater by peroxymonosulfate according to claim 1, wherein the concentration of the peroxymonosulfate is 0.5 mmol/L.
5. The method for catalyzing the oxidative degradation of antibiotic wastewater by peroxymonosulfate as claimed in claim 1, wherein the antibiotic comprises sulfisoxazole.
6. The method for catalyzing the oxidative degradation of antibiotic wastewater by peroxymonosulfate as claimed in claim 1, wherein the concentration of antibiotic in the antibiotic wastewater is not greater than 5 mg/L.
7. The method for catalyzing the oxidative degradation of antibiotic wastewater by peroxymonosulfate according to claim 1, wherein the time for catalytic degradation is not less than 10 min.
8. An agent for oxidative degradation of antibiotic wastewater, wherein the agent comprises CuFeS2And a salt of peroxymonosulfate.
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| CN113402008A (en) * | 2021-05-28 | 2021-09-17 | 湖南大学 | Method for removing antibiotics in water body by using chalcopyrite activated percarbonate |
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| CN115321659B (en) * | 2022-08-03 | 2024-04-09 | 武汉理工大学 | Method for treating organic pollutants in wastewater by utilizing chalcopyrite visible light synergistic catalysis |
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