CN113058631A - Preparation method and application of sludge-red mud compound biochar containing Fe-C-O-N active sites - Google Patents
Preparation method and application of sludge-red mud compound biochar containing Fe-C-O-N active sites Download PDFInfo
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- CN113058631A CN113058631A CN202110294171.XA CN202110294171A CN113058631A CN 113058631 A CN113058631 A CN 113058631A CN 202110294171 A CN202110294171 A CN 202110294171A CN 113058631 A CN113058631 A CN 113058631A
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen 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
- 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
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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
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Abstract
A preparation method and application of sludge-red mud compound biochar containing Fe-C-O-N active sites comprise the steps of mixing and grinding sludge powder, red mud powder and urea to obtain mixed powder; and annealing the mixed powder in an inert atmosphere to obtain the sludge-red mud compound biochar catalyst containing the Fe-C-O-N active sites. The preparation method of the sludge-red mud compound biochar containing the Fe-C-O-N active sites is adopted, the matching relation between different active sites and the generation of the active oxidant is determined, and the active oxidant which plays a main role in the system is identified. Finally, the structure-activity relationship between the structural composition of the catalyst and the catalytic activity of persulfate is established, which is beneficial to designing a high-efficiency compound sludge-red mud biochar catalyst and accelerating the application of the catalyst in water treatment.
Description
Technical Field
The invention belongs to the technical field of resource utilization and water treatment, and particularly relates to a preparation method and application of sludge-red mud compound biochar containing Fe-C-O-N active sites.
Background
Antibiotics are secondary metabolites produced by microorganisms or higher plants during their normal physiological processes and have specific toxic effects on pathogens based on bacteria. With the development of the medical industry, the use amount of antibiotics is increased greatly, and a large amount of antibiotics are discharged into natural water bodies. In recent years, antibiotics are found to induce pathogenic microorganisms to generate drug resistance/tolerance, which is harmful to human health. The persulfate-based advanced oxidation technology (PS-AOP) has great potential in the aspect of efficiently degrading antibiotics in water bodies due to the advantages of strong oxidation capacity, easiness in operation and the like. However, the search for and development of efficient and green catalysts is crucial to the promotion of the development and application of PS-AOP.
The sewage sludge is a byproduct generated by a sewage treatment plant, and the problems of complex components, continuous increase of yield and the like bring great potential threats to the environment, so that how to realize energy regeneration and resource utilization of the sludge becomes a problem which needs to be solved at present. The sludge is found to contain nitrogen and various transition metals (such as iron, aluminum, titanium and the like). The sewage sludge is converted into biochar after heat treatment and can be used as a catalyst for activating persulfate. The red mud is alumina, aluminum soil slag generated in the production process, and is also iron-rich solid waste, and has strong toxicity, complex components, high yield and the like, which cause great burden on the environment. In addition, red mud is typically landfilled after a stabilization/solidification process, placing an economic burden on its management. Therefore, a reliable red mud management and disposal method is urgently needed. The prior research shows that the preparation of the sludge-red mud compound biochar by co-pyrolysis of the sludge and the red mud can exert the catalytic activity of the sludge and the red mud pyrolytic carbon to the maximum extent and realize the resource utilization of the solid waste. However, the relationship between the site of primary role and the active oxidant in the system is not clear; in addition, how to design efficient sludge-red mud compound biochar leads the combination of all active sites on the catalyst to be optimal, the catalytic activity is exerted to the maximum extent, and the effective degradation of antibiotics in water body still needs further research.
Disclosure of Invention
In view of the above, one of the main objectives of the present invention is to provide a method for preparing sludge-red mud composite biochar containing Fe-C-O-N active sites and an application thereof, so as to at least partially solve at least one of the above technical problems.
In order to achieve the above object, as an aspect of the present invention, there is provided a method for preparing sludge-red mud composite biochar containing Fe-C-O-N active sites, comprising:
mixing and grinding sludge powder, red mud powder and urea to obtain mixed powder;
and annealing the mixed powder in an inert atmosphere to obtain the sludge-red mud compound biochar catalyst containing the Fe-C-O-N active sites.
As another aspect of the invention, the invention also provides sludge-red mud compound biochar containing Fe-C-O-N active sites, which is prepared by the preparation method.
As a further aspect of the invention, the invention also provides the application of the sludge-red mud compound biochar containing the Fe-C-O-N active sites obtained by the preparation method or the sludge-red mud compound biochar containing the Fe-C-O-N active sites in the catalysis field.
As a further aspect of the present invention, there is also provided a method of degrading antibiotic contaminants, comprising:
(1) adding the sludge-red mud compound biochar containing the Fe-C-O-N active sites into an antibiotic pollutant solution to be treated to obtain a mixed pollutant solution I;
(2) stirring the mixed pollutant solution I to achieve adsorption balance to obtain a mixed pollutant solution II;
(3) and adding persulfate into the mixed pollutant solution II, and continuously stirring for reaction for a period of time to complete the degradation of the antibiotic pollutants.
Based on the technical scheme, compared with the prior art, the preparation method and the application of the sludge-red mud compound biochar containing the Fe-C-O-N active sites have the following beneficial effects:
(1) the method takes the sludge and the red mud as raw materials, solves the problems of large yield and difficult treatment of the sludge and the red mud, realizes resource utilization of the sludge and the red mud, and has wide application value in the aspect of repairing antibiotic pollution in water body;
(2) the invention provides a sludge-red mud compound biochar catalyst containing Fe-C-O-N active sites and application thereof, which are used for determining the matching relationship between different active sites and the generation of active oxidants and identifying the active oxidants playing a main role in a system; finally, the structure-activity relationship between the structural composition of the catalyst and the catalytic activity of persulfate is established, so that the design of an efficient compound sludge-red mud biochar catalyst is facilitated, and the application of the efficient compound sludge-red mud biochar catalyst in water treatment is accelerated;
(3) the sludge-red mud compound biochar (NSRCB2) containing the Fe-C-O-N active sites, which is prepared by the invention, contains abundant oxygen vacancies, and can effectively activate persulfate;
(4) the removal rate of the NSRCB2 prepared by the method to the antibiotics in 110min reaches more than 90 percent; continuous catalytic degradation experiments show that the stability of the compound biochar catalyst is good.
Drawings
FIG. 1 is a Scanning Electron Microscope (SEM) image of NSRCB2 prepared in example 1 of the present invention;
FIG. 2 is an X-ray photoelectron spectroscopy (XPS) plot of NSRCB2 prepared in example 1 of the present invention;
FIG. 3 is a graph showing the removal rate of Sulfamethoxazole (SMX) after 110min of catalytic reaction of three catalyst materials in examples 1-3 of the present invention;
FIG. 4 is a graph showing the cyclic degradation rate of sulfamethoxazole by NSRCB2 prepared in example 1 of the present invention.
Detailed Description
In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments.
The invention discloses a preparation method of sludge-red mud compound biochar containing Fe-C-O-N active sites, which comprises the following steps:
mixing and grinding sludge powder, red mud powder and urea to obtain mixed powder;
and annealing the mixed powder in an inert atmosphere to obtain the sludge-red mud compound biochar catalyst containing the Fe-C-O-N active sites.
In some embodiments of the invention, the mass ratio of the sludge powder, the red mud powder and the urea is (2-10) to (2-24), for example, 2: 2-10: 2-24, 4: 2-10: 2-24, 6: 2-10: 2-24, 8: 2-10: 2-24, 10: 2-24, (2-10: 2-24), (2-10: 2-10: 4: 2-24), (2-10: 6: 2-10: 8: 2-24), (2-10: 2: 10: 2-24), (2-10: 2-24, (2-10): (12), (2-10): 14, (2-10): 16, (2-10): 18, (2-10): 20, (2-10): 24.
In some embodiments of the present invention, the annealing temperature in the annealing step is 400 to 900 ℃, such as 400 ℃, 500 ℃, 600 ℃, 700 ℃, 800 ℃, 900 ℃; the annealing treatment time is 2-4 h, such as 2h, 2.5h, 3h, 3.5h and 4 h;
in some embodiments of the invention, the flow rate of the inert atmosphere in the annealing step is 0.3-1L/min, such as 0.3L/min, 0.4L/min, 0.5L/min, 0.6L/min, 0.7L/min, 0.8L/min, 1.0L/min;
in some embodiments of the present invention, the temperature increase rate in the annealing step is 3-10 ℃/min, such as 3 ℃/min, 5 ℃/min, 6 ℃/min, 7 ℃/min, 8 ℃/min, 9 ℃/min, 10 ℃/min.
In some embodiments of the invention, the sludge powder and the red mud powder are obtained by drying and crushing; in some embodiments of the invention, the drying temperature is 60-105 ℃, such as 60 ℃, 70 ℃, 80 ℃, 90 ℃, 100 ℃, 105 ℃;
in some embodiments of the invention, the sludge powder and the red mud powder are mixed with urea after being sieved by 100-200 meshes, for example, 100 meshes, 120 meshes, 140 meshes, 160 meshes, 180 meshes and 200 meshes.
The invention also discloses sludge-red mud compound biochar containing the Fe-C-O-N active sites, which is obtained by adopting the preparation method.
The invention also discloses the application of the sludge-red mud compound biochar containing the Fe-C-O-N active sites obtained by the preparation method or the sludge-red mud compound biochar containing the Fe-C-O-N active sites in the field of catalysis.
The invention also discloses a method for degrading antibiotic pollutants, which comprises the following steps:
(1) adding the sludge-red mud compound biochar containing the Fe-C-O-N active sites into an antibiotic pollutant solution to be treated to obtain a mixed pollutant solution I;
(2) stirring the mixed pollutant solution I to achieve adsorption balance to obtain a mixed pollutant solution II;
(3) and adding persulfate into the mixed pollutant solution II, and continuously stirring for reaction for a period of time to complete the degradation of the antibiotic pollutants.
In some embodiments of the invention, in step (1), the concentration of the sludge-red mud complex biochar containing Fe-C-O-N active sites in the mixed pollutant solution one is 0.1-1 g/L, such as 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1.0 g/L.
In some embodiments of the present invention, in the step (2), the mixed pollutant solution is stirred for 10 to 30min, such as 10min, 20min, 30 min; the stirring speed is 150-300 r/min, such as 150r/min, 200r/min, 300 r/min.
In some embodiments of the invention, in step (3), the persulfate concentration is 0.6-6 mmol/L, such as 0.6mmol/L, 1.0mmol/L, 1.5mmol/L, 2.0mmol/L, 2.5mmol/L, 3.0mmol/L, 4.0mmol/L, 5.0mmol/L, 6.0mmol/L2
In some embodiments of the invention, the persulfate salt comprises at least one of a peroxymonosulfate salt or a peroxydisulfate salt;
in some embodiments of the invention, the salt of peroxymonosulfate comprises KHSO5Or NaHSO5At least one of;
in some embodiments of the invention, the peroxydisulfate salt is Na2S2O8Or K2S2O8At least one of;
in some embodiments of the present invention, in the step (3), the stirring time is 30-110 min, such as 30min, 50min, 60min, 80min, 100min, 110 min.
In one exemplary embodiment, the present invention discloses a composition comprising FeThe preparation method of the sludge-red mud compound biochar with the-C-O-N active sites comprises the following steps:
(1) taking sludge and red mud as raw materials, drying and crushing the raw materials, and sieving the raw materials by a nylon sieve to obtain powder for later use; wherein the drying temperature is 60-105 ℃, and the crushed mixture is sieved by a nylon sieve of 100-200 meshes; sieving, keeping in dark place, sealing, and storing in a desiccator.
(2) Mixing urea with the two raw material powders, and grinding uniformly; wherein the mass ratio of the sludge to the red mud to the urea in the mixed powder is (2-10) to (2-24);
(3) annealing the mixed powder in a nitrogen atmosphere, cooling, cleaning and drying, wherein the drying temperature is 60-100 ℃; the drying time is 8-12 h; obtaining the sludge-red mud compound biochar catalyst containing the Fe-C-O-N active sites. Wherein the annealing temperature is 400-900 ℃; the annealing treatment time is 2-4 h; n is a radical of2The flow rate is 0.3-1L/min; the heating rate is 3-10 ℃/min;
the method for degrading antibiotic pollutants by using the catalyst comprises the following steps:
(1) adding the sludge-red mud compound biochar catalyst containing the Fe-C-O-N active sites into an antibiotic pollutant solution to be treated to obtain a mixed pollutant solution I; wherein the concentration of the sludge-red mud compound biochar catalyst containing Fe-C-O-N active sites in the mixed pollutant solution I is 0.1-1 g/L;
(2) continuously stirring the mixed pollutant solution I to achieve adsorption balance to obtain a mixed pollutant solution II; wherein the first stirring time of the mixed pollutant solution is 10-30 min; the stirring speed is 150-300 r/min;
(3) adding persulfate into the mixed pollutant solution II, and continuously stirring for reaction for a period of time to complete the degradation of the antibiotic pollutants; wherein the concentration of the added persulfate is 0.6-6 mmol/L, the persulfate is peroxymonosulfate and peroxydisulfate, and the peroxymonosulfate is KHSO5Or NaHSO5The peroxodisulfate is Na2S2O8Or K2S2O8(ii) a The continuous stirring time is 30-110 min.
The technical solution of the present invention is further illustrated by the following specific embodiments in conjunction with the accompanying drawings. It should be noted that the following specific examples are given by way of illustration only and the scope of the present invention is not limited thereto. The chemicals and raw materials used in the following examples were either commercially available or self-prepared by a known preparation method.
Example 1
The preparation method of the sludge-red mud compound biochar containing the Fe-C-O-N active sites comprises the following specific operation steps:
(1) drying sludge and red mud serving as raw materials in a drying oven at 105 ℃, crushing by using a crusher, sieving by using a 200-mesh nylon sieve to obtain solid powder, sealing and storing in a dryer;
(2) mixing the sludge, the red mud and the urea according to the mass ratio of 1g to 2g, and uniformly grinding the mixture by using a mortar for later use;
(3) and (3) raising the uniformly mixed solid powder to 700 ℃ at a heating rate of 10 ℃/min in a nitrogen atmosphere, annealing for 2h, naturally cooling to room temperature after the annealing is finished, so as to obtain the Fe-C-O-N compound-containing sludge-red mud compound biochar catalyst, washing the catalyst for 6 times by using deionized water and ethanol, and drying at 60 ℃ for 12h, so as to obtain the catalyst named as NSRCB 2.
The SEM image of the high efficiency persulfate-activated NSRCB2 catalyst prepared in this example is shown in fig. 1, and as shown in fig. 1, the porous structure of the NSRCB2 catalyst can be seen, and the surface of the NSRCB2 catalyst is covered by irregular particles, which are coarse, and may be caused by inorganic substances inherent in sludge.
The XPS chart of the high efficiency persulfate-activating NSRCB2 catalyst prepared in this example is shown in fig. 2. As can be seen from the XPS spectrum of fig. 2, the NSRCB2 catalyst contains elements such as Na, Fe, O, Ti, N, Ca, C, S, Cl, Si, and Al, and the relative content of O is high.
The sludge-red mud compound biochar NSRCB2 catalyst containing the Fe-C-O-N active sites, which is obtained in the embodiment, is used for activating potassium hydrogen persulfate to test the degradation performance of sulfamethoxazole, and the specific experimental conditions are as follows: 20mg of the catalyst was weighed into 100mL of sulfamethoxazole solution, wherein the SMX concentration was 15mg/L, the initial pH was 5.36, and the reaction temperature was 25 ℃. After the adsorption-desorption equilibrium is reached within 20 minutes, 0.240mL of 0.6mol/L potassium persulfate hydrogen is added to start the catalytic degradation reaction, and the final degradation result is shown in FIG. 3, wherein the SMX removal rate within 110 minutes reaches 95.22%.
FIG. 4 shows the cyclic degradation of sulfamethoxazole by NSRCB2 catalyst; 3 times of cyclic degradation experiments show that the degradation rate of sulfamethoxazole is reduced by about 10 percent.
Example 2
The preparation method of the sludge-red mud compound biochar containing the Fe-C-O-N active sites comprises the following specific operation steps:
(1) drying sludge and red mud serving as raw materials in a drying oven at 105 ℃, crushing by using a crusher, sieving by using a 200-mesh nylon sieve to obtain solid powder, sealing and storing in a dryer;
(2) mixing the sludge, the red mud and the urea according to the mass ratio of 1g to 4g, and uniformly grinding the mixture by using a mortar for later use;
(3) and (3) raising the uniformly mixed solid powder to 700 ℃ at a heating rate of 10 ℃/min in a nitrogen atmosphere, annealing for 2h, naturally cooling to room temperature after the annealing is finished, so as to obtain the Fe-C-O-N compound-containing sludge-red mud compound biochar catalyst, washing the catalyst for 6 times by using deionized water and ethanol, and drying at 60 ℃ for 12h, so as to obtain the catalyst named as NSRCB 4.
The sludge-red mud compound biochar NSRCB4 catalyst containing the Fe-C-O-N active sites, which is obtained in the embodiment, is used for activating potassium hydrogen persulfate to test the degradation performance of sulfamethoxazole, and the specific experimental conditions are as follows: 20mg of the catalyst was weighed into 100mL of sulfamethoxazole solution, wherein the SMX concentration was 15mg/L, the initial pH was 5.36, and the reaction temperature was 25 ℃. After the adsorption-desorption equilibrium is reached within 20 minutes, 0.240mL of 0.6mol/L potassium persulfate hydrogen is added to start the catalytic degradation reaction, the final degradation result is shown in FIG. 3, and the SMX removal rate within 110 minutes reaches 86.71%.
Example 3
The preparation method of the sludge-red mud compound biochar containing the Fe-C-O-N active sites comprises the following specific operation steps:
(1) drying sludge and red mud serving as raw materials in a drying oven at 105 ℃, crushing by using a crusher, sieving by using a 200-mesh nylon sieve to obtain solid powder, sealing and storing in a dryer;
(2) mixing the sludge, the red mud and the urea according to the mass ratio of 1g to 1g, and uniformly grinding the mixture by using a mortar for later use;
(3) and (3) raising the uniformly mixed solid powder to 700 ℃ at a heating rate of 10 ℃/min in a nitrogen atmosphere, annealing for 2h, naturally cooling to room temperature after the annealing is finished, thus obtaining the sludge-red mud compound biochar catalyst containing Fe-C-O-N active sites, washing the catalyst for 6 times by deionized water and ethanol, and drying at 60 ℃ for 12h, wherein the obtained catalyst is named as NSRCB 1.
The sludge-red mud compound biochar NSRCB1 catalyst containing the Fe-C-O-N active sites, which is obtained in the embodiment, is used for activating potassium hydrogen persulfate to test the degradation performance of sulfamethoxazole, and the specific experimental conditions are as follows: 20mg of the catalyst was weighed into 100mL of sulfamethoxazole solution, wherein the SMX concentration was 15mg/L, the initial pH was 5.36, and the reaction temperature was 25 ℃. After the adsorption-desorption equilibrium is reached within 20 minutes, 0.240mL of 0.6mol/L potassium persulfate hydrogen is added to start the catalytic degradation reaction, the final degradation result is shown in FIG. 3, and the SMX removal rate within 110 minutes reaches 90.85%.
Example 4
Example 4 is the same as the preparation method of example 1, except that in step (2), the sludge, the red mud and the urea are mixed according to the mass ratio of 1g to 12g, and the sludge-red mud compound biochar containing the Fe-C-O-N active sites is also obtained.
Example 5
Example 5 is the same as the preparation method of example 1, except that in step (2), the sludge, the red mud and the urea are mixed according to the mass ratio of 1g to 3g to 2g, and the sludge-red mud compound biochar containing the Fe-C-O-N active sites is also obtained.
Example 6
Example 6 is the same as the preparation method of example 1, except that in step (2), the sludge, the red mud and the urea are mixed according to the mass ratio of 1g to 5g to 2g, and the sludge-red mud compound biochar containing the Fe-C-O-N active sites is also obtained.
Example 7
Example 7 is the same as the preparation method of example 1, except that in step (2), the sludge, the red mud and the urea are mixed according to the mass ratio of 5g to 1g to 2g, and the sludge-red mud compound biochar containing the Fe-C-O-N active sites is also obtained.
Example 8
Example 8 is the same as the preparation method of example 1, except that in step (2), the sludge, the red mud and the urea are mixed according to the mass ratio of 5g to 3g to 2g, and the sludge-red mud compound biochar containing the Fe-C-O-N active sites is also obtained.
Comparative example 1
In order to highlight that the synergistic degradation effect of the sulfamethoxazole is better by the catalyst and the persulfate, a comparative example is arranged and the degradation effect of the sulfamethoxazole is compared with that of the SMX in example 1. The other procedure was the same as in example 1 except that no persulfate was added. Under the same degradation conditions, the degradation rate of SMX in 110 minutes was 8.31%.
Comparative example 2
In order to highlight that the synergistic degradation effect of the sulfamethoxazole is better by the catalyst and the persulfate, a comparative example is arranged and the degradation effect of the sulfamethoxazole is compared with that of the SMX in example 1. The other procedure is the same as in example 1, except that no catalyst, NSRCB2, is added. Under the same degradation conditions, the degradation rate of SMX in 110 minutes was 53.21%.
As can be seen from the experimental results of example 1 and comparative examples 1-2, the synergistic degradation effect of sulfamethoxazole by the catalyst and the persulfate is better.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation method of sludge-red mud compound biochar containing Fe-C-O-N active sites is characterized by comprising the following steps:
mixing and grinding sludge powder, red mud powder and urea to obtain mixed powder;
and annealing the mixed powder in an inert atmosphere to obtain the sludge-red mud compound biochar catalyst containing the Fe-C-O-N active sites.
2. The production method according to claim 1,
the mass ratio of the sludge powder to the red mud powder to the urea is (2-10) to (2-24).
3. The production method according to claim 1,
the annealing temperature in the annealing step is 400-900 ℃; the annealing treatment time is 2-4 h;
the flow speed of the inert atmosphere in the annealing step is 0.3-1L/min;
and in the annealing step, the heating rate is 3-10 ℃/min.
4. The production method according to claim 1,
the sludge powder and the red mud powder are obtained by drying and crushing;
wherein the drying temperature is 60-105 ℃;
and the sludge powder and the red mud powder are sieved by a sieve of 100-200 meshes and then mixed with urea.
5. The sludge-red mud compound biochar containing Fe-C-O-N active sites is obtained by the preparation method of any one of claims 1 to 4.
6. The application of the sludge-red mud composite biochar containing Fe-C-O-N active sites obtained by the preparation method according to any one of claims 1 to 4 or the sludge-red mud composite biochar containing Fe-C-O-N active sites according to claim 5 in the field of catalysis.
7. A method of degrading an antibiotic contaminant comprising:
(1) adding the sludge-red mud compound biochar containing Fe-C-O-N active sites, which is disclosed by claim 5, into an antibiotic pollutant solution to be treated to obtain a mixed pollutant solution I;
(2) stirring the mixed pollutant solution I to achieve adsorption balance to obtain a mixed pollutant solution II;
(3) and adding persulfate into the mixed pollutant solution II, and continuously stirring for reaction for a period of time to complete the degradation of the antibiotic pollutants.
8. The method of degrading antibiotic contaminants of claim 7,
in the step (1), the concentration of the sludge-red mud compound biochar containing Fe-C-O-N active sites in the mixed pollutant solution I is 0.1-1 g/L.
9. The method of degrading antibiotic contaminants of claim 7,
in the step (2), stirring the mixed pollutant solution for 10-30 min; the stirring speed is 150-300 r/min.
10. The method of degrading antibiotic contaminants of claim 7,
in the step (3), the concentration of the persulfate is 0.6-6 mmol/L;
wherein the persulfate comprises at least one of a peroxymonosulfate or peroxydisulfate salt;
wherein said peroxymonosulfate comprises KHSO5Or NaHSO5At least one of;
wherein the peroxydisulfate is Na2S2O8Or K2S2O8At least one of;
wherein, in the step (3), the continuous stirring time is 30-110 min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115090259A (en) * | 2022-04-27 | 2022-09-23 | 南京工业大学 | Magnetic biochar with primary battery function and preparation method and application thereof |
| CN116139901A (en) * | 2022-11-28 | 2023-05-23 | 武汉理工大学 | Ball milling nitrogen-doped sludge biochar and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4017425A (en) * | 1972-11-10 | 1977-04-12 | Shiao Shing Jen | Method of activation of red mud |
| CN106540672A (en) * | 2016-12-07 | 2017-03-29 | 合肥学院 | Magnetic porous sludge carbon-supported metal oxide catalyst and application thereof in degrading azo dyes through persulfate oxidation reaction |
-
2021
- 2021-03-19 CN CN202110294171.XA patent/CN113058631A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4017425A (en) * | 1972-11-10 | 1977-04-12 | Shiao Shing Jen | Method of activation of red mud |
| CN106540672A (en) * | 2016-12-07 | 2017-03-29 | 合肥学院 | Magnetic porous sludge carbon-supported metal oxide catalyst and application thereof in degrading azo dyes through persulfate oxidation reaction |
Non-Patent Citations (2)
| Title |
|---|
| JIAWANG等: "Red mud modified sludge biochar for the activation of peroxymonosulfate: Singlet oxygen dominated mechanism and toxicity prediction", 《SCIENCE OF THE TOTAL ENVIRONMENT》 * |
| RENLIYIN等: "Singlet oxygen-dominated peroxydisulfate activation by sludge-derived biochar for sulfamethoxazole degradation through a nonradical oxidation pathway: Performance and mechanism", 《CHEMICAL ENGINEERING JOURNAL》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115090259A (en) * | 2022-04-27 | 2022-09-23 | 南京工业大学 | Magnetic biochar with primary battery function and preparation method and application thereof |
| CN116139901A (en) * | 2022-11-28 | 2023-05-23 | 武汉理工大学 | Ball milling nitrogen-doped sludge biochar and preparation method and application thereof |
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