Activated carbon loaded metal oxide as well as preparation method and application thereof
By loading iron, copper, or iron-copper bimetallic oxides onto activated carbon and combining this with persulfate treatment, the problem of low removal efficiency of novel hydrophobic UV absorbers is solved, achieving efficient and convenient removal and degradation effects.
Patent Information
- Application Number
- CN202511643924.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-01-30
AI Technical Summary
Existing technologies lack efficient, convenient, and rapid methods for removing novel hydrophobic UV absorbers, and conventional biological treatment methods are either inefficient, complex to operate, or have limited applicability.
Using inexpensive and readily available activated carbon as raw material, iron, copper, or iron-copper bimetallic oxides are loaded through impregnation and calcination, combined with persulfate to efficiently remove macromolecular hydrophobic ultraviolet absorbers from the environment.
It significantly improves the adsorption capacity and surface functional group activity of activated carbon, achieving efficient and synergistic removal and degradation of novel triazine UV absorbers. The process is simple, low-cost, and the materials are reusable.
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Figure CN121422916A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of environmental adsorption purification technology, and particularly relates to an activated carbon loaded metal oxide and a preparation method and application thereof. BACKGROUND
[0002] In recent years, bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT), ethylhexyl triazone (EHT) and diethylhexyl butamido triazone (DBT) as representatives of a new generation of ultraviolet absorbers are widely added to various personal care products due to their excellent light stability and durability. However, such substances lack environmental quality standards or regulatory restrictions in surface water and sediments due to their strong hydrophobicity and large molecular weight. The environmental pollution and risk of new hydrophobic ultraviolet absorbers have attracted widespread attention, and it is urgent to develop efficient and environmentally friendly treatment methods due to the potential harm to the ecological environment.
[0003] Based on the finding in the prior art, there is no efficient, convenient and rapid method for adsorbing and removing triazine ultraviolet absorbers reported at present, and the existing conventional biological treatment method often has problems of insufficient efficiency, complex operation or limited applicability. Therefore, the present application proposes an activated carbon loaded metal oxide and a preparation method and application thereof to solve the problems in the prior art. SUMMARY
[0004] In view of the above problems, the present application aims to provide an activated carbon loaded metal oxide and a preparation method and application thereof, which uses inexpensive and readily available activated carbon as raw material, loads metal oxides by impregnation and calcination to obtain activated carbon loaded iron oxide, activated carbon loaded copper oxide, or activated carbon loaded iron-copper bimetallic oxide, and on this basis, combines with persulfate to efficiently remove new hydrophobic ultraviolet absorbers with large molecular weight and good hydrophobicity in environmental matrices, solving the problems of insufficient efficiency, complex operation or limited applicability of the existing conventional biological treatment method.
[0005] In order to achieve the purpose of the present application, the present application realizes the following technical scheme: an activated carbon loaded metal oxide, comprising activated carbon with a content of 91-99% and metal with a content of 1-9%, the particle size of the activated carbon ranges from 50 to 500 mesh, and the metal is selected from at least one of iron and copper.
[0006] A preparation method of an activated carbon loaded metal oxide, comprising the following steps:
[0007] Step one: the carrier activated carbon is pretreated to obtain modified activated carbon;
[0008] Step two: a soluble metal salt solution is prepared and the pH is adjusted;
[0009] Step three: the modified activated carbon is added to the soluble metal salt solution of step two, and is soaked for 24 hours in a temperature environment of 20-60°C;
[0010] Step four: after filtration, deionized water is used to wash to neutral, and is dried for 10-12 hours in a temperature environment of 100-120°C;
[0011] Step five: is placed in a muffle furnace and calcined for 1-3 hours in a temperature environment of 200-400°C, to obtain activated carbon loaded metal oxide.
[0012] Further improvement lies in that the activated carbon loaded metal oxide is activated carbon loaded iron oxide, and the specific preparation method of the activated carbon loaded iron oxide is:
[0013] A1, the activated carbon is soaked in 0.5-1% dilute nitric acid solution at room temperature for 24 hours, filtered, washed with deionized water to neutral, then soaked in 0.5-1% dilute sodium hydroxide solution at room temperature for 24 hours, filtered, washed with deionized water to neutral, and dried at 100°C for 12 hours after filtration, to obtain modified activated carbon;
[0014] A2, the modified activated carbon is added to a salt solution containing 2.2×10 -3 mol iron ions, the pH is adjusted to 1-4, and is soaked for 24 hours in a temperature environment of 20-60°C, filtered, washed with deionized water to neutral, and dried at 100-120°C for 12 hours;
[0015] A3, then the dried product is placed in a muffle furnace and calcined at a temperature of 300-400°C for 1-3 hours, to obtain activated carbon loaded iron oxide.
[0016] Further improvement lies in that the activated carbon loaded metal oxide is activated carbon loaded copper oxide, and the specific preparation method of the activated carbon loaded copper oxide is:
[0017] B1, the activated carbon is soaked in 0.5-1% dilute nitric acid solution at room temperature for 24 hours, filtered, washed with deionized water to neutral, then soaked in 0.5-1% dilute sodium hydroxide solution at room temperature for 24 hours, filtered, washed with deionized water to neutral, and dried at 100°C for 12 hours after filtration, to obtain modified activated carbon;
[0018] B2, the modified activated carbon is added to a salt solution containing 2×10 -3 mol copper ions, the pH is adjusted to 1-4, and is soaked for 24 hours in a temperature environment of 20-60°C, filtered, washed with deionized water to neutral, and dried at 100-120°C for 12 hours;
[0019] B3, then the dried product is put into a muffle furnace to calcine at a temperature of 300-400°C for 1-3h to obtain activated carbon loaded copper oxide.
[0020] Further improvement lies in that the activated carbon loaded metal oxide is activated carbon loaded iron-copper bimetallic oxide, and the specific preparation method of the activated carbon loaded iron-copper bimetallic oxide is as follows:
[0021] C1, the activated carbon is immersed in 0.5-1% dilute nitric acid solution at room temperature for 24h, then filtered, washed with deionized water until neutral, then immersed in 0.5-1% dilute sodium hydroxide solution at room temperature for 24h, then filtered, washed with deionized water until neutral, and then dried at a temperature of 100°C for 12h to obtain modified activated carbon;
[0022] C2, the modified activated carbon is added to a previously configured dissolvable iron salt and copper salt solution, the pH is adjusted to 1-4, and then immersed at a temperature of 20-60°C for 24h, and then dried at a temperature of 100-120°C for 10-12h;
[0023] C3, after drying, put into a muffle furnace, calcine at a temperature of 200-400°C for 1-3h to obtain activated carbon loaded iron-copper bimetallic oxide.
[0024] Further improvement lies in that in step one, the specific steps for pretreating the activated carbon are as follows: first, disperse the activated carbon in a dilute acid solution and immerse at room temperature for 24h, then wash the immersed activated carbon with deionized water until neutral, then disperse the activated carbon in a dilute alkali solution and immerse at room temperature for 24h, then wash the immersed activated carbon with deionized water until neutral, and finally dry the washed product at a temperature of 100-120°C for 10-12h to obtain pretreated modified activated carbon.
[0025] Further improvement lies in that the dilute acid solution is selected from one of dilute hydrochloric acid solution or dilute nitric acid solution, and the concentration of the dilute acid solution is in the range of 0.1-5%, preferably 0.5% dilute nitric acid solution.
[0026] Further improvement lies in that the dilute alkali solution is selected from one of dilute sodium hydroxide solution or dilute potassium hydroxide solution, and the concentration of the dilute alkali solution is in the range of 0.1-5%, preferably 0.5% dilute sodium hydroxide solution.
[0027] The application of activated carbon loaded metal oxide is applied to adsorption and degradation of novel hydrophobic triazine ultraviolet absorbers with single component or mixed components in the environment, and the specific steps are as follows: the hydrophobic triazine ultraviolet absorber is dissolved in a mixed solution containing a polar organic solvent and water, and then placed in a reactor, and then the persulfate or hydrogen peroxide and the activated carbon loaded metal oxide are added, and the adsorption and degradation experiment is carried out at room temperature, and the persulfate is selected from one of persulfate or dithionite.
[0028] The activated carbon loaded metal oxide prepared by the application effectively enhances the specific surface area and surface functional group activity of the activated carbon, significantly improves the adsorption capacity of the novel triazine ultraviolet absorber, overcomes the problems of limited adsorption capacity and slow adsorption rate of the traditional activated carbon, and can activate advanced oxidants (such as persulfate, hydrogen peroxide, etc.), realize efficient and synergistic removal and degradation of the novel triazine ultraviolet absorber through adsorption and degradation synergistic effect, and the whole preparation process is simple, low in cost, the material can be reused, has good application popularization value and economic feasibility. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 is a removal effect comparison schematic diagram of the triazine ultraviolet absorber in different treatment systems in the embodiment of the application;
[0030] Figure 2 is a TOC removal test result schematic diagram of the activated carbon loaded iron-copper bimetallic oxide on industrial wastewater containing triazine ultraviolet absorber in the embodiment of the application;
[0031] Figure 3 is a stability experiment result schematic diagram of the activated carbon loaded iron oxide in the embodiment of the application;
[0032] Figure 4 is a name and chemical structure schematic diagram of three triazine ultraviolet absorbers in the embodiment of the application. DETAILED DESCRIPTION
[0033] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.
[0034] Bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT), ethylhexyl triazone (EHT) and diethylhexyl butamido triazone (DBT) as a new generation of high efficient hydrophobic UV absorbers, are widely used in sunscreen, textiles and other fields, but their environmental risks have been found to be of concern. Such substances are easily adsorbed on sediments, bioaccumulated due to high octanol-water partition coefficient, and have strong resistance to photolysis and biodegradation, and are persistent in water and sediments.
[0035] It should be noted that the technical means not described in detail in the following examples are conventional means in the art, which are not the key points of the invention and will not be described.
[0036] The active carbon loaded metal oxide of the present application includes active carbon loaded iron oxide (Fe x O y @AC), active carbon loaded copper oxide (CuO@AC) and active carbon loaded iron-copper bimetallic oxide (Fe x O y / CuO@AC).
[0037] Example 1
[0038] The present embodiment provides an active carbon loaded metal oxide, specifically including active carbon loaded iron oxide (Fe x O y @AC), active carbon loaded copper oxide (CuO@AC) and active carbon loaded iron-copper bimetallic oxide (Fe x O y / CuO@AC), wherein:
[0039] The preparation method of the active carbon loaded iron oxide (Fe x O y @AC) includes the following steps:
[0040] A1, 20g of active carbon (300 mesh) is immersed in 0.5-1% dilute nitric acid solution (1% concentration is selected in the present embodiment) at room temperature for 24h, then filtered, washed with deionized water until neutral, then immersed in 0.5-1% dilute sodium hydroxide solution (1% concentration is selected in the present embodiment) at room temperature for 24h, then filtered, washed with deionized water until neutral, and then dried at 100℃ for 12h to obtain modified active carbon;
[0041] A2, 2g of modified active carbon is added to 100mL of salt solution containing 2.2×10 -3 mol of iron ions, the pH is adjusted to 1-4 (the pH is adjusted to 3 in the present embodiment), and then immersed at room temperature for 24h, then filtered, washed with deionized water until neutral, and then dried at 100℃ for 12h;
[0042] A3, then put the dried product into the muffle furnace, calcined at 300-400℃ for 1-3h (the drying temperature of this example is set to 350℃, and the time is 2h), to obtain activated carbon loaded with iron oxide with an iron content of 6%;
[0043] The preparation method of activated carbon loaded with copper oxide (CuO@AC) comprises the following steps:
[0044] B1, 20g of activated carbon (300 mesh) is immersed in 0.5-1% dilute nitric acid solution (the concentration of this example is 1%) at room temperature for 24h, then filtered, washed with deionized water until neutral, then immersed in 0.5-1% dilute sodium hydroxide solution (the concentration of this example is 1%) at room temperature for 24h, then filtered, washed with deionized water until neutral, and then dried at 100℃ for 12h to obtain modified activated carbon;
[0045] B2, 2g of modified activated carbon is added to 100mL of a salt solution containing 2×10 -3 mol of copper ions, the pH is adjusted to 1-4 (the pH of this example is adjusted to 3), and then immersed at room temperature for 24h, filtered, washed with deionized water until neutral, and then dried at 100℃ for 12h;
[0046] B3, then put into the muffle furnace, calcined at 300-400℃ for 1-3h (the drying temperature of this example is set to 350℃, and the time is 2h), to obtain activated carbon loaded with copper oxide with a copper content of 6%;
[0047] The preparation method of activated carbon loaded with iron-copper bimetallic oxide (Fe x O y / CuO@AC) comprises the following steps:
[0048] C1, 20g of activated carbon (300 mesh) is immersed in 0.5-1% dilute nitric acid solution (the concentration of this example is 0.5%) at room temperature for 24h, then filtered, and then washed with deionized water until the activated carbon is neutral, then immersed in 0.5-1% dilute sodium hydroxide solution (the concentration of this example is 0.5%) at room temperature for 24h, then filtered, washed with deionized water until neutral, and then dried at 100℃ for 12h to obtain modified activated carbon;
[0049] The dilute acid solution is selected from one of dilute hydrochloric acid solution or dilute nitric acid solution, and the concentration range is 0.1-5% (the dilute nitric acid solution of this example has a concentration of 0.5%), and the dilute base solution is selected from one of dilute sodium hydroxide solution or dilute potassium hydroxide solution, and the concentration range is 0.1-5% (the dilute sodium hydroxide solution of this example has a concentration of 0.5%);
[0050] C2, 2g of modified activated carbon is added to 100mL of a salt solution containing 1.8×10-3 mol iron ions and 4.8 x 10 -4 mol copper ions, the pH was adjusted to 1-4 (in this example, the pH was adjusted to 3), and the mixture was immersed at room temperature for 24 h. After filtration, the product was washed with deionized water until neutral, and then dried at 100-120°C for 10-12 h (in this example, the drying temperature was set to 100°C, and the drying time was set to 12 h).
[0051] After drying, C3 was placed in a muffle furnace and calcined at 300-400°C for 1-3 h (in this example, the calcination temperature was set to 350°C, and the calcination time was set to 2 h). The resulting activated carbon-supported iron-copper bimetallic oxide had an iron content of 4.5% and a copper content of 1.5%.
[0052] The activated carbon-supported metal oxide prepared in this example was used to adsorb and degrade new hydrophobic triazine UV absorbers with single components or mixed components in the environment. The specific steps were as follows: Figure 4
[0053] The hydrophobic triazine UV absorber was dissolved in a mixed solution containing a polar organic solvent and water, and then placed in a reactor. Peroxymonosulfate or hydrogen peroxide (in this example, peroxymonosulfate was used) and activated carbon-supported metal oxide were added, and the adsorption and degradation experiment was carried out at room temperature. The peroxymonosulfate was selected from one of peroxymonosulfate (PMS) or peroxymonosulfate (PDS) (in this example, peroxymonosulfate was used).
[0054] The activated carbon-supported metal oxide prepared in this example (the dosage was 0.2 g / L) had an adsorption rate of about 70% for three new hydrophobic triazine UV absorbers (BEMT, EHT, and DBT) with single components at room temperature. Compared with untreated commercial activated carbon, the adsorption rate increased by 180-200%.
[0055] The activated carbon-supported metal oxide prepared in this example was combined with peroxymonosulfate (S2O8 2- , PS) to treat industrial wastewater containing triazine UV absorber EHT, and the TOC removal rate reached 90%.
[0056] The activated carbon-supported metal oxide prepared in this example was combined with peroxymonosulfate (S2O8 2- , PS) to treat industrial wastewater containing triazine UV absorber EHT, and the TOC removal rate reached 90%.
[0057] The activated carbon loaded metal oxide prepared by the embodiment can treat new hydrophobic ultraviolet absorber contained in water body under mild conditions to achieve synergistic adsorption and oxidative degradation, has the characteristics of large adsorption capacity, fast reaction rate, low metal ion dissolution rate and excellent cycle stability, and has good practical application prospect.
[0058] Example 2
[0059] Based on Example 1, the adsorption and degradation effects of the activated carbon loaded iron oxide containing 6% iron content and the activated carbon loaded copper oxide containing 6% copper content (both prepared in Example 1) on new hydrophobic triazine ultraviolet absorber (the names and chemical structures of three triazine ultraviolet absorbers are as shown in Figure 4 ) in different systems are verified, and the specific contents are as follows:
[0060] 100 mL of a solution containing triazine ultraviolet absorbers (BEMT, EHT and DBT) (each with an initial concentration of 7 mg / L) is placed in a reactor, and 0.2 g of activated carbon loaded iron oxide and activated carbon loaded copper oxide and 5.0 x 10 -6 mol of PDS are added under stirring, and the reaction is carried out at room temperature for 2 h.
[0061] As shown in Figure 1 parts A, B and C, the adsorption rates of the activated carbon loaded iron oxide and the activated carbon loaded copper oxide on 7 mg / L of BEMT, EHT and DBT all reach 70% after 2 h, which is increased by 180-200% compared with the commercial activated carbon. After the addition of PDS, the removal rates of BEMT, EHT and DBT by the activated carbon loaded iron oxide reach 84.4%, 98.9% and 97.2% after 30 min of reaction, and the removal rates of BEMT, EHT and DBT by the activated carbon loaded copper oxide reach 66.4%, 67.6% and 66.5%.
[0062] Example 3
[0063] Based on Example 1, the performance of the activated carbon loaded iron-copper bimetallic oxide containing 4.5% iron content and 1.5% copper content (provided in Example 1) in treating industrial wastewater containing BEMT, EHT and DBT is tested, and the specific contents are as follows:
[0064] After the industrial wastewater containing triazine ultraviolet absorbers (BEMT, EHT and DBT) is filtered to remove insoluble solids, 100 mL is taken and placed in a reactor, 2 g of activated carbon loaded iron-copper bimetallic oxide and 5.0 x 10 -5 mol of PDS are added under stirring, the temperature is 20-25°C, and the reaction is carried out at room temperature for 2 h.
[0065] As shown in Figure 2As shown, after the combined use of PDS, in the activated carbon-supported iron-copper bimetallic oxide system, the TOC removal rates for wastewater containing BEMT with an initial TOC concentration of 100.22 mg / L, wastewater containing EHT with an initial TOC concentration of 70.17 mg / L, and wastewater containing DBT with an initial TOC concentration of 97.46 mg / L were 28.6–32.2%, 87.2–90.1%, and 51.8–55.2%, respectively.
[0066] Therefore, it can be seen that the activated carbon-supported metal oxides combined with persulfate prepared in this embodiment have a significant effect on adsorbing and degrading novel triazine ultraviolet absorbers (BEMT, EHT and DBT).
[0067] Example 4
[0068] This embodiment provides a stability test of activated carbon-supported iron oxides.
[0069] 100 mL of solutions containing triazine UV absorbers (BEMT, EHT, and DBT) (initial concentration 7 mg / L) were placed in a reactor, and 0.2 g of activated carbon-supported iron oxide and 5.0 × 10⁻⁶ ppm were added respectively with stirring. -6 mol of PDS was reacted at room temperature for 2 hours, and then filtered to obtain activated carbon supported iron oxide after the first reaction. After washing, it was dried at 100°C for 2 hours. After cooling, the activated carbon supported iron oxide after the first reaction was added, and the experiment was carried out under the same reaction conditions. The above reaction, filtration, washing and drying process was repeated.
[0070] The results are as follows Figure 3 As shown, after six cycles, the activated carbon-supported iron oxide still achieved a removal rate of approximately 95% for the three triazine UV absorbers, and the material's adsorption and activation persulfate performance remained stable.
[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. An activated carbon-supported metal oxide characterized by: It includes active carbon with content of 91-99% and metal with content of 1-9%, the particle size of the active carbon ranges from 50 to 500 mesh, and the metal is at least one selected from iron and copper.
2. A method for producing an activated carbon-supported metal oxide, characterized by, It includes the following steps: Step one: the carrier active carbon is pretreated to obtain modified active carbon; Step two: the solution of dissoluble metal salt is prepared and then the pH is adjusted; Step three: the modified active carbon is added into the solution of dissoluble metal salt in step two, and is immersed for 24 hours in the temperature environment of 20-60℃; Step four: after filtration, it is washed with deionized water until neutral, and is dried for 10-12 hours in the temperature environment of 100-120℃; Step five: it is placed in the muffle furnace and calcined for 1-3 hours in the temperature environment of 200-400℃, to obtain active carbon loaded metal oxide.
3. The method of claim 2, wherein the metal oxide is selected from the group consisting of titanium oxide, vanadium oxide, chromium oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, copper oxide, zinc oxide, and mixtures thereof. The active carbon loaded metal oxide is active carbon loaded iron oxide, and the specific preparation method of the active carbon loaded iron oxide is: A1, the active carbon is immersed in 0.5-1% dilute nitric acid solution at room temperature for 24 hours, then filtered, washed with deionized water until neutral, then immersed in 0.5-1% dilute sodium hydroxide solution at room temperature for 24 hours, then filtered, washed with deionized water until neutral, and then dried at 100℃ for 12 hours after filtration, to obtain modified active carbon; A2, modified activated carbon is added to the salt solution containing 2.2 x 10 -3 mol iron ions, the pH is adjusted to 1-4, and it is immersed at a temperature of 20-60°C for 24 h, filtered, washed with deionized water until neutral, and dried at a temperature of 100-120°C for 12 h; A3, then the dried product is placed in the muffle furnace and calcined at 300-400℃ for 1-3 hours, to obtain active carbon loaded iron oxide.
4. The method of claim 2, wherein the metal oxide is selected from the group consisting of titanium oxide, vanadium oxide, chromium oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, copper oxide, zinc oxide, and mixtures thereof. The active carbon loaded metal oxide is active carbon loaded copper oxide, and the specific preparation method of the active carbon loaded copper oxide is: B1, the active carbon is immersed in 0.5-1% dilute nitric acid solution at room temperature for 24 hours, then filtered, washed with deionized water until neutral, then immersed in 0.5-1% dilute sodium hydroxide solution at room temperature for 24 hours, then filtered, washed with deionized water until neutral, and then dried at 100℃ for 12 hours after filtration, to obtain modified active carbon; B2, adding modified activated carbon into the salt solution containing 2 x 10 -3 mol copper ions, adjusting pH to 1-4, immersing at 20-60 °C for 24 h, filtering, washing with deionized water to neutral, and drying at 100-120 °C for 12 h; B3, then the dried product is placed in the muffle furnace and calcined at 300-400℃ for 1-3 hours, to obtain active carbon loaded copper oxide.
5. The method of claim 2, wherein the metal oxide is selected from the group consisting of titanium oxide, vanadium oxide, chromium oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, copper oxide, zinc oxide, and mixtures thereof. The active carbon loaded metal oxide is active carbon loaded iron-copper bimetallic oxide, and the specific preparation method of the active carbon loaded iron-copper bimetallic oxide is: C1, the active carbon is immersed in 0.5-1% dilute nitric acid solution at room temperature for 24 hours, then filtered, washed with deionized water until neutral, then immersed in 0.5-1% dilute sodium hydroxide solution at room temperature for 24 hours, then filtered, washed with deionized water until neutral, and then dried at 100℃ for 12 hours after filtration, to obtain modified active carbon; C2, the modified active carbon is added into the previously prepared dissoluble iron salt and copper salt solution, the pH is adjusted to 1-4, and then immersed for 24 hours in the temperature range of 20-60℃, and then dried at 100-120℃ for 10-12 hours; C3, after drying, it is placed in the muffle furnace and calcined at 200-400℃ for 1-3 hours, to obtain active carbon loaded iron-copper bimetallic oxide.
6. The method of claim 2, wherein the metal oxide is selected from the group consisting of titanium oxide, vanadium oxide, chromium oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, copper oxide, zinc oxide, and mixtures thereof. The specific step of pretreating the activated carbon in step one is: first dispersing the activated carbon in a dilute acid solution and immersing at room temperature for 24 hours, then washing the immersed activated carbon to neutral with deionized water, subsequently dispersing the activated carbon in a dilute alkali solution and immersing at room temperature for 24 hours, then washing the immersed activated carbon to neutral with deionized water, and finally drying the washed product at 100-120℃ for 10-12 hours to obtain the pretreated modified activated carbon.
7. The method of claim 6, wherein the metal oxide is selected from the group consisting of titanium oxide, vanadium oxide, chromium oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, copper oxide, zinc oxide, and mixtures thereof. The dilute acid solution is selected from one of dilute hydrochloric acid solution or dilute nitric acid solution, and the concentration of the dilute acid solution is in the range of 0.1-5%, preferably 0.5% dilute nitric acid solution.
8. The method of claim 6, wherein the metal oxide is selected from the group consisting of titanium oxide, vanadium oxide, chromium oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, copper oxide, zinc oxide, and mixtures thereof. The dilute alkali solution is selected from one of dilute sodium hydroxide solution or dilute potassium hydroxide solution, and the concentration of the dilute alkali solution is in the range of 0.1-5%, preferably 0.5% dilute sodium hydroxide solution.
9. Use of activated carbon supported metal oxides, characterized in that: The activated carbon loaded metal oxide is applied to adsorb and degrade a novel hydrophobic triazine ultraviolet absorber of single component or mixed components in the environment, and the specific steps are: dissolving the hydrophobic triazine ultraviolet absorber in a mixed solution containing a polar organic solvent and water, placing in a reactor, adding persulfate or hydrogen peroxide and the activated carbon loaded metal oxide, and performing adsorption and degradation experiments at room temperature, wherein the persulfate is selected from one of peroxymonosulfate or peroxodisulfate.