Iron-titanium co-supported resin material, preparation method and application thereof
By using resin materials co-loaded with iron oxide and titanium oxide, the problem of efficient removal of manganese pollution in groundwater has been solved, achieving efficient adsorption and low-cost groundwater purification, which is suitable for the remediation of manganese pollution under high mineralization conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHANGCHUN GOLD RES INST
- Filing Date
- 2026-05-11
- Publication Date
- 2026-06-30
AI Technical Summary
Existing technologies are insufficient for efficiently removing manganese contamination from groundwater, especially under conditions of high mineralization. Traditional materials have slow adsorption rates and are costly, posing a risk of secondary pollution.
Iron oxide and titanium oxide were co-loaded onto a sulfonic acid-based cation exchange resin. Through the synergistic effects of ion exchange, surface complexation, catalytic oxidation-adsorption, and oxidation precipitation, a nano-active layer was formed, thus preparing an iron-titanium co-loaded resin material.
It achieves efficient capture of manganese ions in groundwater, increases saturated adsorption capacity, is suitable for in-situ or ex-situ remediation, reduces production and application costs, avoids pore blockage and secondary pollution, and achieves a removal rate of over 95%.
Smart Images
Figure CN122298369A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of in-situ groundwater remediation technology, specifically to an iron-titanium co-loaded resin material, its preparation method, and its application in removing manganese from groundwater. Background Technology
[0002] Groundwater is an important source of drinking water and industrial water in my country. Affected by geological movements, mining, and industrial wastewater leakage, manganese pollution in groundwater is becoming increasingly prominent. When the manganese content in groundwater exceeds the Class III limit of 0.1 mg / L in the "Groundwater Environmental Quality Standard" (GB / T 14848-2017), it may pose potential harm to the human nervous and digestive systems. Therefore, efficient manganese removal is an urgent need to ensure groundwater safety. Summary of the Invention
[0003] Therefore, it is necessary to provide an iron-titanium co-loaded resin material, its preparation method and application, which can achieve efficient removal of manganese pollution from groundwater.
[0004] The present invention adopts the following technical solution: This invention provides an iron-titanium co-supported resin material, which uses sulfonic acid-based cation exchange resin to support iron oxide and titanium oxide.
[0005] Preferably, the loading mass ratio of iron oxide to titanium oxide in the iron-titanium co-loaded resin material is (0.9~1.1):(0.9~1.1), and the loading of both iron oxide and titanium oxide is ≥100mg / g.
[0006] This invention also provides a method for preparing an iron-titanium co-supported resin material, comprising the following steps: The Fe-supported resin intermediate was obtained by shaking and soaking a sulfonic acid-based cation exchange resin with an iron ion solution, followed by washing and drying. The Fe-supported resin intermediate was subjected to a shaking soaking reaction with a titanium ion solution, followed by washing and drying to obtain an iron-titanium composite modified resin intermediate. The iron-titanium composite modified resin intermediate was stirred and reacted with a mixed treatment solution containing sodium persulfate and sodium hydroxide, washed until neutral, and dried to obtain a composite resin material co-loaded with iron oxide and titanium oxide.
[0007] In some embodiments, the sulfonic acid-based cation exchange resin is a 001x7 type cation exchange resin, the iron ion solution is a ferric chloride solution, and the mass ratio of the sulfonic acid-based cation exchange resin to ferric chloride is 1:(2~2.5). Preferably, in the step of preparing the Fe-supported resin intermediate, the molar concentration of the ferric chloride solution is 0.15 mol / L, the shaking rate is 100~200 r / min, the reaction time is 10~14 h, and after washing with water, it is dried at 50~70°C.
[0008] In some embodiments, the titanium ion solution is a titanium trichloride solution, and the mass ratio of sulfonic acid-based cation exchange resin to titanium trichloride is 1:(1.5~2). Preferably, in the step of preparing the iron-titanium composite modified resin intermediate, the molar concentration of the titanium trichloride solution is 0.19 mol / L, the shaking rate is 100~200 r / min, the reaction time is 10~14 h, and after washing with water, it is dried at 50~70℃.
[0009] In some embodiments, the mass ratio of sulfonic acid-based cation exchange resin to sodium persulfate and sodium hydroxide is 1:(0.3~0.5):(4~6), and the reaction product is washed with water until neutral and then dried at 50~70°C.
[0010] The present invention also provides the application of the above-mentioned iron-titanium co-supported resin material as a water purification adsorbent.
[0011] The present invention also provides the application of the above-mentioned iron-titanium co-loaded resin material in the removal of manganese from groundwater.
[0012] Compared with the prior art, the core technical advantages and beneficial effects of this invention are as follows: The iron-titanium co-loaded resin material of this invention uses sulfonic acid-based cation exchange resin to co-load iron oxide and titanium oxide, exhibiting significant advantages in groundwater purification. Compared to ordinary resin adsorbents, the iron-titanium hydrated oxide nano-active layer can achieve highly efficient capture of manganese ions in groundwater through the synergistic effects of ion exchange, surface complexation, catalytic oxidation-adsorption, and oxidative precipitation, increasing the saturated adsorption capacity by more than 60%. It also solves the problem of slow adsorption rates in traditional materials, making it suitable for in-situ or ex-situ remediation projects of manganese pollution in groundwater.
[0013] The present invention uses iron-titanium co-loaded resin material as a nano-adsorbent. By precisely controlling the loading conditions of Fe and Ti components and the oxidation precipitation process, a stable iron-titanium composite oxide nano-active layer is formed on the resin surface.
[0014] The preparation process of the iron-titanium co-supported resin material of this invention enhances the synergistic effect of catalytic oxidation and adsorption by optimizing the metal salt ratio and the soaking reaction-oxidation precipitation process parameters, thereby improving the material's selectivity for target pollutants and resisting interference from highly mineralized water matrices. Furthermore, the preparation process is easily scalable, requiring no harsh conditions such as high temperature and high pressure, is simple, generates no toxic or harmful byproducts, has strong process controllability and high stability, and the prepared material can be repeatedly regenerated and recycled. The ferric chloride, titanium trichloride, sodium persulfate, and sodium hydroxide used are all commonly used industrial reagents, inexpensive and readily available, significantly reducing production and application costs.
[0015] Compared to nano-metal oxide powder adsorbents, the iron-titanium co-supported resin material of this invention has good formability, is renewable, and is not easily lost. Furthermore, through microstructure optimization, it possesses excellent permeability, allowing direct filling into permeable reactive grids (PRBs) for in-situ remediation. This effectively reduces the risk of pore blockage, ensures the long-term operational stability of the PRB, and avoids secondary pollution. In particular, when groundwater salinity is greater than 1000 mg / L, pH is 6.5–8.0 (the typical groundwater pH range), and manganese concentration is below 5 mg / L, the application of the iron-titanium co-supported resin material effectively addresses the Mn concentration in groundwater. 2+ The removal rate is ≥95%, and the manganese concentration in the treated effluent meets the Class III water standard of the "Environmental Quality Standard for Groundwater" (GBT 14848-2017), overcoming the technical challenge of significant cation interference in highly mineralized groundwater. This invention offers both outstanding environmental and economic benefits, providing a new technical approach for the remediation of manganese pollution in groundwater. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the reaction route for preparing the iron-titanium co-supported resin material of the present invention.
[0017] Figure 2 SEM images of the iron-titanium composite oxide before and after loading on the 001X7 carrier are shown; where (a) is the 001X7 resin carrier and (b) is the iron-titanium co-loaded resin material. Detailed Implementation
[0018] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.
[0020] The technical concept of this invention lies in providing an iron-titanium co-supported resin material, which uses sulfonic acid-based cation exchange resin to support nano-iron oxide and titanium oxide nanoparticles, and has a significant effect as a water purification adsorbent.
[0021] like Figure 1 As shown, the present invention provides a method for preparing an iron-titanium co-supported resin material, comprising the following steps: Step 1: The sulfonic acid-based cation exchange resin was subjected to a shaking soaking reaction with an iron ion solution, followed by washing and drying to obtain an Fe-supported resin intermediate.
[0022] Step 2: The Fe-supported resin intermediate is subjected to a shaking and soaking reaction with a titanium ion solution, followed by washing and drying to obtain the iron-titanium composite modified resin intermediate.
[0023] Step 3: Stir the iron-titanium composite modified resin intermediate with a mixed treatment solution containing sodium persulfate and sodium hydroxide.
[0024] Step 4: Wash the product after the above stirring reaction until neutral, and dry it to obtain a composite resin material co-loaded with (hydrated) iron oxide and (hydrated) titanium oxide nanoparticles.
[0025] The present invention will be further described in detail below with reference to specific embodiments, so that those skilled in the art can more clearly understand the present invention. The following embodiments are only used to illustrate the present invention, and are not intended to limit the scope of the present invention. Based on the specific embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. In the embodiments of the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art; in the embodiments of the present invention, unless specifically specified, the technical means used are conventional means well known to those skilled in the art.
[0026] Key reagent material sourcing information: Sulfonic acid-based cation exchange resin: Type 001x7 cation exchange resin, purchased from Hisilicon (Tianjin) New Materials Technology Co., Ltd., is a cation exchange resin with sulfonic acid groups (-SO3H) on a 7% cross-linked styrene-divinylbenzene copolymer. Pretreatment is required before use: soak in a 5% sodium chloride solution for 12 hours, then wash with deionized water until neutral, and dry at 60℃ to constant weight for later use.
[0027] Example 1 This embodiment provides a method for preparing an iron-titanium co-supported resin material, including the following steps: S1, Preparation of Fe-supported resin intermediate: Take 0.4g of the pretreated 001x7 type cation exchange resin and place it in a reaction vessel.
[0028] 0.81 g of ferric chloride (FeCl3·6H2O) was dissolved in 20 mL of deionized water to prepare a ferric chloride solution with a concentration of approximately 0.15 mol / L.
[0029] Ferric chloride solution was poured into a reaction vessel containing 001x7 type cation exchange resin, and the mixture was shaken and soaked at a rate of 150 r / min for 12 h at room temperature (25 ± 2 °C). After the shaking and soaking reaction was completed, the mixture was repeatedly washed with deionized water and then placed in a drying device and dried at 60 °C for 12 h to obtain 0.4 g of Fe-supported resin intermediate (denoted as 001x7-Fe).
[0030] S2, Preparation of Fe / Ti supported resin intermediate: The Fe-supported resin intermediate (0.4 g) prepared in step S1 was dispersed in 20 mL of deionized water and stirred to obtain a suspension system of Fe-supported resin intermediate.
[0031] 4 mL of a 15% (w / w) titanium trichloride (TiCl3) solution was slowly added to the Fe-supported resin intermediate suspension, and the shaking and soaking reaction was continued at a rate of 150 r / min for 12 h at room temperature (25 ± 2 °C). After the shaking and soaking reaction was completed, the mixture was repeatedly washed with deionized water and then dried in a drying device at 60 °C for 12 h to obtain the iron-titanium co-supported resin intermediate (denoted as 001x7-Fe / Ti).
[0032] S3, Oxidation precipitation preparation of iron-titanium co-supported resin material (001x7-FeO / TiO composite resin material): Preparation of mixed treatment solution: Weigh 0.2g sodium persulfate and 2.4g sodium hydroxide, add a small amount of distilled water to dissolve and cool to room temperature, transfer to a 20mL volumetric flask, make up to volume, shake well, bottle and label, and use immediately.
[0033] The iron-titanium composite supported resin intermediate (denoted as 001x7-Fe / Ti) (0.4g) obtained in step S2 was placed in the above mixed treatment solution and stirred and soaked at a rate of 150r / min for 8h. After soaking, the resin was repeatedly washed with deionized water until the washing solution was neutral (pH=6.0~7.0). Then it was placed in a drying device and dried at 60℃ for 12h to obtain the finished iron-titanium co-supported resin material (001x7-FeO / TiO composite material). After drying, it needs to be stored in a sealed container.
[0034] In this embodiment, the iron oxide loading in the iron-titanium co-loaded resin material is approximately 116.49 mg / g, and the titanium oxide loading is approximately 122.52 mg / g.
[0035] The iron-titanium co-supported resin material (001x7-FeO / TiO composite material) prepared in this embodiment was characterized, and the SEM test results are as follows: Figure 2 As shown.
[0036] See Figure 2Figure (a) shows that the 001X7 support without composite oxide loading exhibits a clear granular aggregate structure with a particle size of approximately 200-500 nm and obvious pores between particles. See Figure 2 Figure (b) shows the 001X7 composite material after iron-titanium co-loading. The carrier surface is uniformly coated with nano-sized (20~100nm) oxides, the original large particle outlines disappear, and a dense flocculent agglomerate structure is formed, proving that the active component is successfully loaded and uniformly dispersed.
[0037] The performance of the iron-titanium co-supported resin material (001x7-FeO / TiO composite material) prepared in this embodiment as a manganese adsorption material was tested.
[0038] The adsorption effect of the material prepared in this embodiment on manganese ions was evaluated using the static adsorption method: First, take groundwater samples with actual manganese ion concentrations exceeding the standard for later use. The component contents are shown in Table 1 below: Table 1. Ion concentrations in groundwater (unit: mg / L) The experimental apparatus was soaked in dilute nitric acid, washed and dried with deionized water to eliminate interference from impurities. Then, 100 mL of simulated water sample was injected into an Erlenmeyer flask, and 0.025 g of purifying agent (001x7-FeO / TiO composite material) was precisely added. The purifying agent concentration was 0.25 g / L. The flask was placed in a constant temperature shaking incubator and shaken at 150 r / min and 25±2℃ for 24 h until adsorption equilibrium was reached. At the same time, a blank control and three parallel samples were set up to control experimental errors. After shaking, the filtrate was collected for later use.
[0039] The groundwater quality of this embodiment was purified and tested, and the results are shown in Table 2 below: Table 2. Statistics of ion concentrations in groundwater before and after purification (unit: mg / L) Based on the initial manganese ion concentration (C0) and the residual concentration of the filtrate (C... e ), calculate the core performance indicators of the purification agent: Equilibrium adsorption capacity formula: qe=(C0-C e )×V / m, Manganese removal rate formula: η=[(C0-C e ) / C0]×100%, In the formula, qe is in mg / g, V is the volume of the water sample (L), and m is the amount of purifying agent added (g).
[0040] Calculation results: The 001x7-FeO / TiO composite material prepared in this embodiment has a saturated adsorption capacity of 18.2 mg / g for manganese in groundwater as a purifying agent. It has a removal rate of up to 98.91% for manganese-containing groundwater with an initial concentration of 4.6 mg / L. The manganese concentration in the treated effluent is 0.05 mg / L, which is lower than the Class III water limit (0.1 mg / L) in the "Groundwater Quality Standard" (GB / T 14848-2017).
[0041] Comparative test Referring to the preparation method of the 001x7-FeO / TiO composite material in Example 1, the inventors' team also investigated the influence of different process parameters on the performance of the prepared iron-titanium co-loaded resin material.
[0042] Compared with Example 1, Comparative Examples 1-8 differ only in that a single process parameter is changed; the remaining operating steps, reagent dosages, and process conditions are completely consistent with Example 1 and will not be repeated here.
[0043] For specific parameter changes, please refer to Table 3 below: Table 3 Summary of process parameters for Comparative Examples 1-8 The groundwater purification effect of the prepared iron-titanium co-loaded resin material was tested according to the same method and steps as in Example 1.
[0044] The purifying agent concentration was 0.25 g / L, and it was placed in a constant temperature shaking box and shaken at 150 r / min and 25±2℃ for 24 h until adsorption equilibrium was reached.
[0045] The test results are shown in Table 4 below: Table 4. Statistical table of purification performance test results of adsorbents prepared in different experimental examples. The test results shown in the table above indicate that: (1) The concentration of ferric chloride solution directly affects Fe 3+ When the loading rate and the mass ratio of ferric chloride to resin are less than 2.025:1, the adsorbent has insufficient active sites, leading to a significant decrease in adsorption capacity and manganese removal rate; when the shaking soaking time is less than 12 hours, Fe... 3+ If the adsorbent cannot be fully adsorbed on the resin surface, its performance will also be reduced.
[0046] (2)Ti 3+ The introduction of Fe can be related to 3+ The adsorbent with only Fe component (Comparative Example 3) showed the worst adsorption performance for manganese, forming synergistic adsorption sites.
[0047] (3) The oxidation precipitation time determines the degree of conversion of low-valence ions into high-valence hydroxide nanoparticles. When the activation time is insufficient, the active layer structure is unstable and it is difficult to achieve efficient removal of manganese. Insufficient drying time will make it difficult for hydroxides to form and impair adsorption performance.
[0048] Furthermore, through extensive experimentation and research, the inventors' team discovered that in the preparation process of the iron-titanium co-supported resin composite material of this invention: (1) Use 001x7 type cation exchange resin. The pretreatment process is preferably soaking in 5% sodium chloride solution for 12 hours, and finally washing with deionized water until neutral. Dry at 60°C to constant weight before use.
[0049] (2) In the process of preparing the Fe-supported resin intermediate, the preferred mass ratio of sulfonic acid cation exchange resin to ferric chloride is 1:(2~2.5), and the preferred molar concentration of the ferric chloride solution is around 0.15 mol / L. Excessive concentration will lead to Fe... 3+ Aggregation on the resin surface reduces the utilization rate of active sites; too low a concentration results in insufficient Fe loading, affecting subsequent manganese removal adsorption performance. The shaking and soaking time needs precise control; too short a time will result in Fe... 3+ Insufficient adsorption and prolonged adsorption time will increase energy consumption without providing any additional performance improvement. The cleaning process must be thorough to ensure that no free Fe is present on the resin surface. 3+ To avoid subsequent reaction with TiCl3, which could affect the composite modification effect, the preferred drying process parameters are 60℃ for 12 hours to ensure that the moisture content of the resin intermediate meets the standard.
[0050] (3) In the process of preparing the iron-titanium co-supported resin intermediate, it is preferable to first uniformly suspend the Fe-supported resin intermediate in deionized water. The preferred mass ratio of sulfonic acid-based cation exchange resin to titanium trichloride is 1:(1.5~2). The molar concentration of the titanium trichloride solution (prepared fresh for use) is controlled to be around 0.19 mol / L to avoid Ti 3+ Oxidation by oxygen in the air leads to a decrease in Ti loading. The preferred oscillating reaction rate is 150 ± 50 r / min, and the reaction temperature is maintained at room temperature to ensure Ti... 3+ A stable complex structure is formed with the resin surface and Fe component. The reaction time is preferably controlled at 12 hours to ensure that Ti 3+ Sufficient loading. The preferred drying process parameters are drying at 60℃ for 12 hours. After drying, it must be sealed and stored immediately to prevent the intermediate from getting damp or oxidized, which would affect the subsequent activation effect.
[0051] (4) In the oxidation precipitation process, sodium persulfate is preferably used as the oxidant, working in conjunction with sodium hydroxide, to remove Fe from the resin surface. 3+ Further stabilized into Fe(OH)3, Ti 3+The sulfonic acid-based cation exchange resin is oxidized to Ti(OH)4, forming a composite active layer. The preferred mass ratio of sulfonic acid-based cation exchange resin to sodium persulfate and sodium hydroxide is 1:(0.3~0.5):(4~6). The stirring and soaking rate is controlled at 100~150 r / min, the reaction temperature is room temperature, and the soaking time is controlled at 8 h to ensure sufficient oxidation reaction and stable active layer formation. The washing process must continue until the pH of the washing solution reaches a neutral range of 6.0~7.0 to avoid residual alkaline substances on the adsorbent surface, which would affect its applicability in groundwater. The drying process parameters are 60℃ for 12 h. After drying, it must be stored in a sealed container to prevent moisture absorption and inactivation.
[0052] (5) If only Fe or Ti components are used to modify the 001×7 type resin without bimetallic composite loading, although this scheme can achieve the adsorption and removal of manganese ions in groundwater, the adsorption capacity is only 40%~60% of that of bimetallic composite adsorbents, and it has poor adaptability to complex water quality. The removal rate decreases significantly under the interference of coexisting ions in groundwater.
[0053] (6) If hydrogen peroxide or sodium hypochlorite is used instead of sodium persulfate as the oxidizing precipitant to activate mono / bimetallic loaded resins, although this method can promote the formation of a metal hydroxide active layer on the resin surface, the hydrogen peroxide activation system is prone to decomposition and the oxidation effect is unstable; sodium hypochlorite activation will introduce chloride ions, which may cause an increase in groundwater salinity, and both activators have the risk of reagent residue, increasing the cost of subsequent treatment.
[0054] (7) If the process steps of the present invention remain unchanged, the Fe ion soaking reaction time is extended to 48h, the Ti ion soaking reaction time is extended to 48h, and the oxidation precipitation time is extended to 24h. Although the adsorbent performance can be improved to a certain extent, the production cycle and energy consumption will be greatly increased, and excessive loading will easily lead to resin pore blockage, which will reduce the regeneration performance of the adsorbent and has no value for large-scale application.
[0055] (8) In the iron-titanium co-loaded resin material of the present invention, the preferred loading mass ratio of iron oxide and titanium oxide is (0.9~1.1):(0.9~1.1), the loading amount of iron oxide and titanium oxide is ≥100mg / g, and the overall saturated adsorption capacity of the product is ≥15mg / g, and the manganese removal rate is ≥90%.
[0056] It should be noted that the above embodiments are only for further elaboration and explanation of the technical solution of the present invention, and are not intended to further limit the technical solution of the present invention. The method of the present invention is only a preferred embodiment and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A co-supported iron-titanium resin material, characterized in that, It uses sulfonic acid-based cation exchange resin to support iron oxide and titanium oxide.
2. The iron-titanium co-supported resin material according to claim 1, characterized in that, The loading mass ratio of iron oxide to titanium oxide is (0.9~1.1):(0.9~1.1), and the loading of both iron oxide and titanium oxide is ≥100mg / g.
3. A method for preparing an iron-titanium co-supported resin material, characterized in that, Includes the following steps: The Fe-supported resin intermediate was obtained by shaking and soaking a sulfonic acid-based cation exchange resin with an iron ion solution, followed by washing and drying. The Fe-supported resin intermediate was subjected to a shaking soaking reaction with a titanium ion solution, followed by washing and drying to obtain an iron-titanium composite modified resin intermediate. The iron-titanium composite modified resin intermediate was stirred and reacted with a mixed treatment solution containing sodium persulfate and sodium hydroxide, washed until neutral, and dried to obtain a composite resin material co-loaded with iron oxide and titanium oxide.
4. The method for preparing the iron-titanium co-supported resin material according to claim 3, characterized in that, The sulfonic acid-based cation exchange resin is a 001x7 type cation exchange resin, the iron ion solution is a ferric chloride solution, and the mass ratio of the sulfonic acid-based cation exchange resin to ferric chloride is 1:(2~2.5).
5. The method for preparing the iron-titanium co-supported resin material according to claim 3, characterized in that, In the step of preparing Fe-supported resin intermediate, the molar concentration of ferric chloride solution is 0.15 mol / L, the shaking rate is 100~200 r / min, the reaction time is 10~14 h, and after washing with water, it is dried at 50~70℃.
6. The method for preparing the iron-titanium co-supported resin material according to claim 3, characterized in that, The titanium ion solution is a titanium trichloride solution, and the mass ratio of sulfonic acid-based cation exchange resin to titanium trichloride is 1:(1.5~2).
7. The method for preparing the iron-titanium co-supported resin material according to claim 6, characterized in that, In the step of preparing the iron-titanium composite modified resin intermediate, the molar concentration of titanium trichloride solution was 0.19 mol / L, the shaking rate was 100~200 r / min, the reaction time was 10~14 h, and after washing with water, it was dried at 50~70℃.
8. The method for preparing the iron-titanium co-supported resin material according to claim 6, characterized in that, The mass ratio of sulfonic acid-based cation exchange resin to sodium persulfate and sodium hydroxide is 1:(0.3~0.5):(4~6). After stirring and washing the reaction product with water until neutral, it is dried at 50~70℃.
9. The application of the iron-titanium co-supported resin material as described in claim 1 or 2 as a water purification adsorbent.
10. The application according to claim 9, characterized in that, The application of the iron-titanium co-loaded resin material in the removal of manganese from groundwater.