KR101746185B1 - Fenton catalyst for oxidation treating, method for producing the same, and method for treating contamination in water using the same - Google Patents
Fenton catalyst for oxidation treating, method for producing the same, and method for treating contamination in water using the same Download PDFInfo
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- KR101746185B1 KR101746185B1 KR1020150093440A KR20150093440A KR101746185B1 KR 101746185 B1 KR101746185 B1 KR 101746185B1 KR 1020150093440 A KR1020150093440 A KR 1020150093440A KR 20150093440 A KR20150093440 A KR 20150093440A KR 101746185 B1 KR101746185 B1 KR 101746185B1
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- 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
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
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- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
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- 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)
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/06—Washing
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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
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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Abstract
The present invention relates to a catalyst for the treatment of Fenton oxidation wherein the content of Fe is 30 to 60 wt%, Ti is 1 to 10 wt%, and the balance of oxygen is 100 wt%.
Description
A catalyst for Fenton oxidation treatment capable of being activated in a neutral pH range, a method for producing the catalyst, and a method for treating pollutants in water using the catalyst.
Advanced Oxidation Technology (AOT) is a water treatment technology that can rapidly decompose organic pollutants by producing active oxidizing species with strong oxidizing power. Such high-level oxidation techniques include technologies that utilize chemicals and catalysts, technologies that utilize photochemical methods, and technologies that utilize electrical energy, and are used for water treatment.
However, Fenton's systems which are conventionally used, there is a problem, such as the creation and generation of large amounts of iron sludge 4 gacheol compound weak oxidizing power than the hydroxyl radical (and OH) in the neutral pH region (Ferry ion). In addition, there is a difficulty in applying the phenomenon due to a problem such as a large amount of catalyst input requirement.
Therefore, there is a need for a new water treatment technique capable of solving the above problems.
A catalyst for Fenton oxidation treatment which can be activated in a neutral pH range, a method for producing the catalyst, and a method for treating pollutants in water using the catalyst.
The catalyst according to an embodiment of the present invention comprises a catalyst for Fenton oxidation treatment wherein 30 to 60 wt% of Fe, 1 to 10 wt% of Ti, and the balance of oxygen are contained in 100 wt% can do. More specifically, it may further comprise 1 to 5% by weight of Al.
Further, it is also possible to provide a catalyst for Fenton oxidation treatment wherein 40 to 60% by weight of Fe, 1 to 5% by weight of Ti and the balance contains oxygen.
More specifically, 30 to 50% by weight of Fe, 1 to 10% by weight of Ti, 1 to 5% by weight of Al and the balance may contain oxygen. However, the present invention is not limited thereto.
The particle size of the catalyst may be between 0.1 and 0.4 mu m.
According to another embodiment of the present invention, there is provided a method of preparing a catalyst, comprising: preparing an organic solution by mixing an organic solvent and distilled water; Introducing an Fe precursor into the organic solution; Introducing a Ti precursor into the solution containing the Fe precursor; Introducing a pH adjusting agent into the solution to which the Ti precursor is added; And heating the solution containing the pH adjuster to produce a catalyst; . ≪ / RTI >
Introducing an Fe precursor into the organic solution; Introducing an Fe precursor and an Al precursor into the organic solution; . ≪ / RTI >
Introducing an Fe precursor into the organic solution; From the Fe precursor may include Fe (ClO 4) 3, FeCl 3, or combinations thereof. The concentration of the Fe precursor introduced into the organic solution may be 1 to 2M.
Introducing an Fe precursor and an Al precursor into the organic solution; In the Al precursor may include AlCl 3. The concentration of the Al precursor introduced into the organic solution may be 0.1 to 0.5M.
Mixing an organic solvent and distilled water to prepare an organic solution; , The organic solvent may comprise ethanol, methanol, or a combination thereof.
Mixing an organic solvent and distilled water to prepare an organic solution; , The concentration of the organic solvent in the distilled water may be 0.5 to 1 M.
Introducing a Ti precursor into the solution containing the Fe precursor; In the Ti precursor may include TiSO 4, Ti {OCH (CH 3) 2} 4, TiCl 4, or a combination thereof. The concentration of the Ti precursor introduced into the solution into which the Fe precursor has been added may be 0.05 to 0.1M.
Introducing a pH adjusting agent into the solution to which the Ti precursor is added; In the pH adjusting agent may include NaOH, NH 4 OH, or a combination thereof. Also, the concentration of the pH adjusting agent may be 1 to 1.5M.
Heating the solution containing the pH adjuster to produce a catalyst; , The temperature at which the solution is heated may be heated in the range of 80 to 90 占 폚 for 2 to 3 hours.
Heating the solution containing the pH adjuster to produce a catalyst; Thereafter, washing and drying the produced catalyst; As shown in FIG.
Washing and drying the resultant catalyst; , The catalyst may be washed with distilled water for 1 to 1.5 hours. Thereafter, the washed catalyst may be dried at 105 to 110 ° C for 2 to 4 hours.
According to another embodiment of the present invention, there is provided a method of treating pollutants in water, comprising: injecting hydrogen peroxide into wastewater containing organic pollutants; And introducing a catalyst for the Fenton oxidation treatment into the wastewater into which the hydrogen peroxide is injected; Wherein the catalyst for the Fenton oxidation treatment comprises 30 to 60% by weight of Fe, 1 to 10% by weight of Ti, and the balance of oxygen, based on 100% by weight of the total of the wastewater containing the organic pollutants, Wherein the pH is in the range of 3 to 10.
Injecting hydrogen peroxide into the wastewater containing the organic contaminants; , The organic contaminants may include phenol, 4-chlorophenol, acetaminophen, benzoic acid, carbamazepine, or combinations thereof. In addition, the amount of the hydrogen peroxide may be 10 to 50 mM for 0.1 to 100 mol / l of the organic contaminants.
Introducing a catalyst for Fenton oxidation treatment into the wastewater to which the hydrogen peroxide is injected; , The amount of the catalyst may be 1.0 to 5.0 g / L, and hydroxyl radicals may be formed by the introduced catalyst. Further, the catalyst may be reacted for 2 to 4 hours after the addition of the catalyst.
According to one embodiment of the present invention, a catalyst capable of being activated in the neutral pH region can be obtained. Further, the process for reducing the pH to the acidic region and the cost can be reduced by using the catalyst. Therefore, active oxidizing species having a strong oxidizing power even in the neutral pH range can be produced, and thus the pollutants in the decomposable water can be effectively controlled.
FIG. 1 is a graph comparing the decomposition rates of acetaminophen using the catalysts according to Inventive Example 1, Inventive Example 2, and Comparative Example 1. FIG.
Fig. 2 is a graph showing the decomposition rates of organic pollutants of phenol and 4-chlorophenol, using the catalysts of Inventive Examples 1 and 2.
BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. However, it is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is intended that the disclosure of the present invention be limited only by the terms of the appended claims. Like reference numerals refer to like elements throughout the specification.
Thus, in some embodiments, well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention. Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Whenever a component is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, not the exclusion of any other element, unless the context clearly dictates otherwise. Also, singular forms include plural forms unless the context clearly dictates otherwise.
The catalyst for Fenton oxidation treatment according to an embodiment of the present invention may contain 30 to 60% by weight of Fe, 1 to 10% by weight of Ti, and the balance of oxygen, based on 100% by weight of the whole. In addition, it may further contain 1 to 5% by weight of Al. More specifically, from 40 to 60 wt% of Fe, from 1 to 5 wt% of Ti, and the remainder may contain oxygen.
More specifically, 50 to 60 wt% of Fe, 1 to 10 wt% of Ti, 1 to 5 wt% of Al, and the balance may contain oxygen.
The composition range of the catalyst defined above may be determined by the content of the precursor introduced in the process for producing a catalyst, which is another embodiment of the present invention described below. More specifically, the concentration of the Fe precursor may be 1 to 2M, the concentration of the Al precursor may be 0.1 to 0.5M, and the concentration of the Ti precursor may be 0.05 to 0.1M.
In addition, the Fe precursor may include Fe (ClO 4) 3, FeCl 3 , or combinations thereof. The Al precursor may comprise AlCl 3 and the Ti precursor may comprise TiSO 4 , Ti {OCH (CH 3 ) 2 } 4 , TiCl 4 , or a combination thereof.
The Fe precursor and the Al precursor serve as a structure of the resulting catalyst. In addition, when the concentration is satisfied, it is not dissociated at the pH of the neutral region and can be maintained in a stable state.
The Ti precursor combines with the Fe and Al precursors to enhance the efficiency of the hydrogen peroxide decomposition at the pH of the neutral region. In addition, when the concentration is satisfied, it is possible to increase the decomposition efficiency of the organic pollutants to the hydrogen peroxide decomposition efficiency.
The particle size of the catalyst may be 0.1 to 0.4 탆.
When the size of the catalyst particle is 0.1 to 0.4 탆 as described above, the rate of formation of the active oxidizing agent and the decomposition rate of the target contaminant can be increased due to the increase of the contact area of hydrogen peroxide.
According to another embodiment of the present invention, there is provided a method for preparing a catalyst for Fenton oxidation treatment, comprising: preparing an organic solution by mixing an organic solvent and distilled water; Introducing an Fe precursor into the organic solution; Introducing a Ti precursor into the solution containing the Fe precursor; Introducing a pH adjusting agent into the solution to which the Ti precursor is added; And heating the solution containing the pH adjuster to produce a catalyst; . ≪ / RTI >
First, an organic solvent is prepared by mixing an organic solvent and distilled water; , The organic solvent may comprise ethanol, methanol, or a combination thereof. However, the present invention is not limited thereto. The concentration of the organic solvent in the distilled water may be 0.5 to 1 M.
The reason why the organic solvent is mixed with the distilled water as described above is to effectively disperse the Fe and Al precursors in the solution phase. When the concentration of the organic solvent satisfies the above range, a catalyst having a particle size of 0.1 to 0.4 mu m can be produced by the precipitation method.
Thereafter, an Fe precursor is added to the organic solution; . ≪ / RTI > Introducing an Fe precursor into the organic solution; Introducing an Fe precursor and an Al precursor into the organic solution; As shown in FIG.
At this time, the Fe precursor may include, but is not limited to, Fe (ClO 4 ) 3 , FeCl 3, or a combination thereof. The concentration of the Fe precursor may be 1 to 2M.
In addition, the Al precursor may include AlCl 3 , but is not limited thereto. The concentration of the Al precursor may be 0.1 to 0.5M.
The Fe precursor and the Al precursor serve as a structure of the resulting catalyst. In addition, when the concentration is satisfied, it is not dissociated at the pH of the neutral region and can be maintained in a stable state.
Introducing a Ti precursor into the solution containing the Fe precursor; In the Ti precursor may include TiSO 4, Ti {OCH (CH 3) 2} 4, TiCl 4, or a combination thereof. Also, the concentration of the Ti precursor may be 0.05 to 0.1M.
The Ti precursor binds with Fe and Al precursors and enhances the decomposition efficiency of hydrogen peroxide at the pH of the neutral region. In addition, when the concentration is satisfied, it is possible to increase the decomposition efficiency of the organic pollutants to the hydrogen peroxide decomposition efficiency.
The method may further include the step of injecting a pH adjusting agent into the solution to which the Ti precursor is added; In the pH adjusting agent may include NaOH, NH 4 OH, or a combination thereof. Also, the concentration of the pH adjusting agent may be 1 to 1.5M.
The pH adjusting agent serves to precipitate Fe, Al, and Ti precursors as oxidized forms by adjusting the reaction solution having an acidic pH to the pH of the neutral-basic region. In addition, when the catalyst is added by the above-mentioned concentration range, the catalyst can be efficiently produced within a relatively short time and the effect of increasing the yield of the catalyst can be obtained.
Heating the solution containing the pH adjuster to produce a catalyst; , The solution may be heated at 80 to 90 占 폚 for 2 to 3 hours.
When heating is carried out in the temperature and time range, the chemical bonding between the metal precursors is promoted and the catalyst can be efficiently produced.
Heating the solution containing the pH adjuster to produce a catalyst; Thereafter, washing and drying the produced catalyst; As shown in FIG.
Washing and drying the resultant catalyst; , The salt may be washed with distilled water for 1 to 1.5 hours. The washed salt may then be dried at 105-110 < 0 > C for 2-4 hours.
When the catalyst is washed and dried in the above range, impurities such as unreacted precursors and organic substances are not left on the surface of the catalyst, so that a metal oxide catalyst effective for decomposition of organic pollutants can be produced.
According to another embodiment of the present invention, there is provided a method of treating pollutants in water, comprising: injecting hydrogen peroxide into wastewater containing organic pollutants; And introducing a catalyst for the Fenton oxidation treatment into the wastewater into which the hydrogen peroxide is injected; To treat the pollutants in the water.
However, the pH of the wastewater containing the organic pollutants may be 3 to 10. More specifically, it may be from 5 to 8. More specifically, it may be from 6 to 8.
In addition, the catalyst for the Fenton oxidation treatment may be the catalyst for the Fenton oxidation treatment produced according to one embodiment of the present invention as described above.
More specifically, the catalyst for the Fenton oxidation treatment may contain 30 to 60% by weight of Fe, 1 to 10% by weight of Ti, and the balance of oxygen, based on 100% by weight of the total.
Injecting hydrogen peroxide into the wastewater containing the organic contaminants; , The organic contaminants may include phenol, 4-chlorophenol, acetaminophen, benzoic acid, carbamazepine, or combinations thereof.
The amount of the hydrogen peroxide may be in the range of 10 to 50 mM for 0.1 to 100 mol / l of the organic contaminants.
When hydrogen peroxide is added in the above range, active radicals such as hydroxyl radicals and tetravalent species decomposing organic pollutants can be produced.
Thereafter, a step of injecting a catalyst for Fenton oxidation treatment into the wastewater into which the hydrogen peroxide is injected is introduced; , The input amount of the catalyst may be 1.0 to 5.0 g / L.
When the amount of the catalyst is in the above range, the effect of decomposing hydrogen peroxide is excellent and the production efficiency of the hydroxyl radical can be increased.
The method may further comprise the step of injecting a catalyst for the Fenton oxidation treatment into the wastewater to which the hydrogen peroxide is injected; , The water pollutants can be decomposed by the catalyst for 2 to 4 hours.
When decomposed for 2 to 4 hours as described above, most of the pollutants in water can be decomposed.
Hereinafter, the embodiment will be described in detail. The following examples are illustrative of the present invention only and are not intended to limit the scope of the present invention.
Example
Honor One: Fe - Ti Manufacture of catalysts using oxides
An organic solution was prepared by mixing 1M ethanol and distilled water 100ml.
A concentration of 1M in the organic solution Fe (ClO 4) 3 were added.
To the solution containing Fe (ClO 4 ) 3 , 0.1 M TiSO 4 was added.
A 1.5M concentration of NaOH was added to the solution to which TiSO 4 was added.
Thereafter, the catalyst was produced by heating at 90 DEG C for 2 hours.
The resultant catalyst was washed three times with distilled water for one hour and dried at 110 DEG C for four hours.
The weight percentages of iron and titanium constituting the catalyst were about 60% and about 3%, respectively, and the remainder was oxygen.
Honor 2: Fe - Al - Ti Manufacture of catalysts using oxides
An organic solution was prepared by mixing 1M ethanol and distilled water 100ml.
Of 1M concentration in the organic solution, Fe (ClO 4) was charged with AlCl 3 in the third and 0.5M concentration.
The solution containing Fe (ClO 4 ) 3 and AlCl 3 was added with 0.1 M TiSO 4 .
A 1.5M concentration of NaOH was added to the solution to which TiSO 4 was added.
Thereafter, the catalyst was produced by heating at 90 DEG C for 2 hours.
The resultant catalyst was washed three times with distilled water for one hour and dried at 110 DEG C for four hours.
The weight percentages of iron, titanium, and aluminum constituting the catalyst were about 55%, about 3%, and about 5%, respectively, and the balance was oxygen.
Comparative Example 1: Catalyst manufacture using iron oxide
An organic solution was prepared by mixing 1M ethanol and distilled water 100ml.
A concentration of 1M in the organic solution Fe (ClO 4) 3 were added.
To the solution to which Fe (ClO 4 ) 3 had been added was added 1.5 M NaOH.
After the addition of NaOH, the mixture was heated at 90 DEG C for 2 hours to form a catalyst.
The resultant catalyst was washed three times with distilled water for one hour and dried at 110 DEG C for four hours.
The weight percentage of iron constituting the produced catalyst was about 70%, and the balance was confirmed to be composed of oxygen.
Experimental Example
Experimental Example One: Acetaminophen Decomposition experiment
After preparing 99.5 mL of acetaminophen dissolved in 0.01 mM, 0.5 mL of a 10 M hydrogen peroxide standard solution was added to 100 mL of the reaction solution so as to satisfy the condition of hydrogen peroxide injection at a concentration of 50 mM.
Thereafter, 3.0 g / L of the catalyst of Inventive Example 1, Inventive Example 2 and Comparative Example 1 was added. Then, after 2 hours passed, the decomposition rate of acetaminophen was measured. The pH of the reaction solution used was 7.
As a result, as shown in Fig. 1, in the case of Comparative Example 1, after about 2 hours, about 10% of the acetaminophen was not decomposed.
On the other hand, in the case of Inventive Example 1, it is confirmed that after 2 hours, the decomposition rate of acetaminophen is close to 100%. Further, even in the case of Inventive Example 2, the decomposition rate is close to 90%, which shows that the ability to remove contaminants is excellent.
Experimental Example 2: phenol and 4- Chlorophenol Decomposition experiment
The decomposition rates of phenol and 4-chloropetal, which are organic contaminants other than acetaminophen, which were conducted in Experimental Example 1, were measured.
99.5 mL of 0.01 mM phenol and 4-chloropetal dissolved in water was prepared, and 0.5 mL of a 10 M hydrogen peroxide standard solution was added to 100 mL of the reaction solution so as to satisfy the condition of hydrogen peroxide injection at a concentration of 50 mM.
Thereafter, 3.0 g / L of the catalyst of Inventive Example 1 and Inventive Example 2 was added. Then, after 4 hours passed, the decomposition rates of phenol and 4-chloropetal were measured. The pH of the reaction solution used was 7.
As a result, as shown in FIG. 2, it can be seen that the ability to remove contaminants such as phenol and 4-chlorophenol is also excellent.
More specifically, when the catalyst of Inventive Example 1 was used, it was found that the ability to decompose 4-chlorophenol was better than that of phenol, but the ability to decompose phenol was also excellent, about 50% or more.
Particularly, as a result of using the catalyst according to Inventive Example 2, the degradable organic pollutants such as phenol and 4-chlorophenol also exhibited decomposition rates of about 80% after 4 hours, .
This means that the lower the pH of the Fenton oxidation reaction, the faster the reaction takes place. In other words, the closer the pH is to neutrality, the more difficult it is to produce hydroxyl radicals, and it is difficult to produce active oxidizing species having a strong oxidizing power.
However, the catalyst according to one embodiment of the present invention can effectively control the decomposable organic pollutants by the formation of hydroxyl radicals using a catalyst capable of strong activation even in a neutral pH range as shown in FIGS. 1 and 2 .
While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand.
It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention .
Claims (29)
40 to 60 wt% of Fe, and 1 to 5 wt% of Ti.
And Fe: 50 to 60% by weight.
Wherein the catalyst has a particle size of 0.1 to 0.4 mu m.
Introducing an Fe precursor into the organic solution;
Introducing a Ti precursor into the solution containing the Fe precursor;
Introducing a pH adjusting agent into the solution to which the Ti precursor is added; And
Heating the solution containing the pH adjuster to produce a catalyst; Wherein the Fenton oxidation catalyst is a catalyst.
Introducing an Fe precursor into the organic solution; Quot;
Introducing an Fe precursor and an Al precursor into the organic solution; Wherein the Fenton oxidation catalyst is a catalyst.
Introducing an Fe precursor into the organic solution; in,
The Fe precursor Fe (ClO 4) 3, FeCl 3, or the Fenton process for producing a catalyst for the oxidation treatment comprises a combination of the two.
Introducing an Fe precursor into the organic solution; in,
Wherein the concentration of the Fe precursor introduced into the organic solution is 1 to 2M.
Introducing an Fe precursor and an Al precursor into the organic solution; in,
Wherein the Al precursor is AlCl 3 .
Introducing an Fe precursor and an Al precursor into the organic solution; in,
Wherein the concentration of the Al precursor introduced into the organic solution is 0.1 to 0.5 M.
Mixing an organic solvent and distilled water to prepare an organic solution; in,
Wherein the organic solvent comprises ethanol, methanol, or a combination thereof.
Mixing an organic solvent and distilled water to prepare an organic solution; in,
Wherein the concentration of the organic solvent in the distilled water is 0.5 to 1 M.
Introducing a Ti precursor into the solution containing the Fe precursor; in,
The Ti precursor TiSO 4, Ti {OCH (CH 3) 2} 4, TiCl 4, or the Fenton process for producing a catalyst for the oxidation treatment comprises a combination of the two.
Introducing a Ti precursor into the solution containing the Fe precursor; in,
Wherein the concentration of the Ti precursor introduced into the solution into which the Fe precursor is charged is 0.05 to 0.1 M.
Introducing a pH adjusting agent into the solution to which the Ti precursor is added; in,
The pH adjusting agent The method of NaOH, NH 4 OH, or for the Fenton oxidation catalyst comprises a combination of the two.
Introducing a pH adjusting agent into the solution to which the Ti precursor is added; in,
Wherein the concentration of the pH adjusting agent is 1 to 1.5 M.
Heating the solution containing the pH adjuster to produce a catalyst; in,
Wherein the temperature for heating the solution is 80 to 90 占 폚.
Heating the solution containing the pH adjuster to produce a catalyst; in,
Wherein the solution is heated for 2 to 3 hours.
Heating the solution containing the pH adjuster to produce a catalyst; Since the,
Washing and drying the resultant catalyst; Wherein the catalyst further comprises a catalyst.
Washing and drying the resultant catalyst; in,
Wherein the catalyst is washed with distilled water for 1 to 1.5 hours.
Washing and drying the resultant catalyst; in,
Wherein the washed catalyst is dried at 105 to 110 < 0 > C.
Washing and drying the resultant catalyst; in,
Wherein the washed catalyst is dried for 2 to 4 hours.
Introducing a catalyst for Fenton oxidation treatment into the wastewater to which the hydrogen peroxide is injected; , ≪ / RTI &
Wherein the catalyst for the Fenton oxidation treatment contains 30 to 60 wt% of Fe, 1 to 10 wt% of Ti, and the balance of oxygen, and the pH concentration of the wastewater containing the organic contaminants is 6 to 8. < / RTI >
Injecting hydrogen peroxide into the wastewater containing the organic contaminants; in,
Wherein the organic contaminant comprises phenol, 4-chlorophenol, acetaminophen, benzoic acid, carbamazepine, or a combination thereof.
Injecting hydrogen peroxide into the wastewater containing the organic contaminants; in,
Wherein the amount of the hydrogen peroxide is 10 to 50 mM for 0.1 to 100 mol / l of the organic contaminant.
Introducing a catalyst for Fenton oxidation treatment into the wastewater to which the hydrogen peroxide is injected; in,
And the amount of the catalyst is 1.0 to 5.0 g / L.
Introducing a catalyst for Fenton oxidation treatment into the wastewater to which the hydrogen peroxide is injected; in,
Wherein hydroxyl radicals are formed by the introduced catalyst.
Introducing a catalyst for Fenton oxidation treatment into the wastewater to which the hydrogen peroxide is injected; By this,
Lt; / RTI > for 2 to 4 hours.
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| KR101944523B1 (en) | 2017-11-23 | 2019-01-31 | 울산과학기술원 | Preparing method of magnetic heterogeneous fenton catalyst for oxidation treating capable of being activated at neutral pH |
| CN110102319A (en) * | 2019-05-07 | 2019-08-09 | 华东理工大学 | The method and its application of the carrier loaded FeOCl of formation solid |
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| CN112675910B (en) * | 2021-01-11 | 2022-03-25 | 燕山大学 | Amyloid fiber ferric hydroxide heterogeneous Fenton catalyst and preparation method and application thereof |
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| KR101944523B1 (en) | 2017-11-23 | 2019-01-31 | 울산과학기술원 | Preparing method of magnetic heterogeneous fenton catalyst for oxidation treating capable of being activated at neutral pH |
| CN110102319A (en) * | 2019-05-07 | 2019-08-09 | 华东理工大学 | The method and its application of the carrier loaded FeOCl of formation solid |
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