CN109265613B - Functionalized polystyrene microsphere and preparation method and application thereof - Google Patents
Functionalized polystyrene microsphere and preparation method and application thereof Download PDFInfo
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Abstract
The invention belongs to the field of water treatment, and particularly discloses a functionalized polystyrene microsphere, a preparation method and application thereof, and a treatment method of an aluminum-containing water body. The functionalized polystyrene microsphere is prepared by gamma-ray radiation and/or electron beam radiation, and comprises a polystyrene microsphere and a polymer layer which is bonded to the surface of the polystyrene microsphere and is obtained by polymerizing a functionalized monomer, wherein the functionalized monomer is unsaturated acid. When the functionalized polystyrene microsphere provided by the invention is used for treating an aluminum-containing water body, particularly an aluminum-containing acidic aqueous solution, the functionalized polystyrene microsphere not only can keep sufficient stability and improve the removal efficiency of aluminum ions, but also can realize the recycling of the water body, for example, when the aluminum-containing water body is an aluminum-containing nitric acid solution, the recycling of nitric acid can be realized, the total nitrogen emission is reduced, and the functionalized polystyrene microsphere has an industrial application prospect.
Description
Technical Field
The invention belongs to the field of water treatment, and particularly relates to a functionalized polystyrene microsphere, a preparation method and application thereof, and a treatment method of an aluminum-containing water body.
Background
At present, a lot of acidic aqueous solution containing aluminum ions is generated in the process of processing aluminum products. Research has proved that the drinking water contains too much aluminum, which can lead to early senility and even senile dementia. The research of the world health organization shows that the aluminum allowed to be taken in per kilogram of body weight of a human body cannot exceed 1 milligram, and the aluminum content in drinking water specified in China cannot be higher than 0.2 milligram/liter. Meanwhile, the environmental water eutrophication caused by the discharge of nitrate radical in the water solution has attracted great attention from the environmental protection department. Therefore, the treatment of aluminum ions in acidic aqueous solutions is of great significance.
The method for removing the aluminum ions in the water body mainly comprises reinforced coagulation, activated carbon adsorption, membrane treatment and the like. The method has the advantages that the aim of removing the aluminum ions is fulfilled by adding a coagulant into water to react with the aluminum ions to generate precipitates, and although the method has good removing efficiency, the operation process is complex and secondary pollution is easy to generate. The active carbon adsorption is to adsorb aluminum ions by using active carbon so as to achieve the aim of removing the aluminum ions, the process is complex, the cost is high, and the adsorption material is not easy to regenerate and utilize; the membrane treatment method also has the above-mentioned disadvantages. In a word, the existing method for removing the aluminum ions in the water body has the problems of complex process, high cost and difficult regeneration and utilization of the adsorbing material, and particularly has the problems of insufficient stability of the adsorbing material in the strong-acid water body and low metal ion removal efficiency which are needed to be solved. In addition, so far, no relevant report is found on reasonable treatment of aluminum ions in nitric acid solution.
Disclosure of Invention
Aiming at the problems of poor resin stability, low metal ion removal efficiency and the like in the current strong acid solution treatment process, the invention designs and synthesizes the radiation crosslinking functional resin for efficiently removing aluminum ions in an aluminum-containing water body, particularly a nitric acid water solution. Among them, the inventors of the present invention have found, after intensive studies, that functionalized polystyrene microspheres obtained by bonding unsaturated acids to the surfaces of polystyrene microspheres by a radiation crosslinking technique have a unique microstructure, can significantly increase the stability of resins, and simultaneously improve the removal efficiency of aluminum ions, thereby completing the present invention.
Specifically, the invention provides a functionalized polystyrene microsphere, wherein the functionalized polystyrene microsphere is prepared by gamma-ray radiation and/or electron beam radiation, and comprises a polystyrene microsphere and a polymer layer which is bonded to the surface of the polystyrene microsphere and is obtained by polymerizing a functionalized monomer, and the functionalized monomer is unsaturated acid.
The invention also provides a preparation method of the functionalized polystyrene microsphere, wherein the method comprises the step of subjecting the polystyrene microsphere and a functionalized monomer to gamma-ray radiation and/or electron beam radiation in a dispersion medium, so that the functionalized monomer is polymerized and bonded to the surface of the polystyrene microsphere to form a polymer layer.
The invention also provides application of the functionalized polystyrene microsphere in removing aluminum ions in an aluminum-containing water body.
In addition, the invention also provides a method for treating the water body containing the aluminum, which comprises the step of introducing the water body containing the aluminum into a column filled with the functionalized polystyrene microspheres to remove aluminum ions in the water body by an adsorption mode.
When the functionalized polystyrene microsphere provided by the invention is used for treating an aluminum-containing water body, particularly an aluminum-containing acidic aqueous solution, the functionalized polystyrene microsphere not only can keep sufficient stability and improve the removal efficiency of aluminum ions, but also can realize the recycling of the water body, for example, when the aluminum-containing water body is an aluminum-containing nitric acid aqueous solution, the recycling of nitric acid can be realized, the total nitrogen emission is reduced, and the functionalized polystyrene microsphere has an industrial application prospect.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 shows the change in the concentration of aluminum ions in a sample treated with an aqueous solution of aluminum-containing nitric acid;
FIG. 2 shows the variation of the concentration of aluminum ions in the eluent during regeneration;
FIG. 3 shows the change in the concentration of aluminum ions in the adsorbed water after five times of repeated use;
fig. 4 shows the change in the aluminum ion concentration in the eluent during regeneration after five times of repeated use.
FIG. 5 is a Fourier Infrared (FT-IR) spectrum, where a is the FT-IR spectrum of the resin before the first use and b is the FT-IR spectrum of the resin after the last repeated use.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein.
The functionalized polystyrene microsphere provided by the invention is prepared by gamma-ray radiation and/or electron beam radiation, and comprises a polystyrene microsphere and a polymer layer which is bonded to the surface of the polystyrene microsphere and is obtained by polymerizing a functionalized monomer, wherein the functionalized monomer is unsaturated acid.
According to the present invention, the polymer layer is preferably contained in an amount of 1 to 50 parts by weight, more preferably 5 to 30 parts by weight, relative to 100 parts by weight of the polystyrene microspheres, which enables the functionalized polystyrene microspheres to have higher efficiency of removing aluminum ions.
The particle size of the polystyrene microsphere is not particularly limited in the present invention, and may be, for example, 0.2 to 5 μm, and more preferably 1 to 2 μm.
The unsaturated acid is preferably at least one selected from the group consisting of unsaturated phosphoric acid, unsaturated sulfonic acid and unsaturated carboxylic acid. Specific examples of the unsaturated phosphoric acid include, but are not limited to: at least one of vinylphosphoric acid, propenylphosphoric acid, dimethyl vinylphosphate, diethyl vinylphosphate, and diethyl propenylphosphate. Specific examples of the unsaturated sulfonic acid include, but are not limited to: at least one of vinyl sulfonic acid, methacrylic sulfonic acid and sodium methallyl sulfonate. The unsaturated carboxylic acid is preferably acrylic acid and/or methacrylic acid.
According to a preferred embodiment of the present invention, the unsaturated acid is a mixture of unsaturated phosphoric acid and unsaturated sulfonic acid and/or unsaturated carboxylic acid, that is, the unsaturated acid is a mixture of unsaturated phosphoric acid and unsaturated sulfonic acid, or a mixture of unsaturated phosphoric acid and unsaturated carboxylic acid, or a mixture of unsaturated phosphoric acid, unsaturated sulfonic acid and unsaturated carboxylic acid, and thus the corresponding functionalized polystyrene microsphere has higher stability and efficiency of removing aluminum ions. Further, the weight ratio of the amount of the unsaturated phosphoric acid to the total amount of the unsaturated sulfonic acid and the unsaturated carboxylic acid is preferably 1: (1-6), more preferably 1: (2-4). When the unsaturated acid contains only one of the unsaturated sulfonic acid and the unsaturated carboxylic acid, the total amount of the unsaturated sulfonic acid and the unsaturated carboxylic acid is the amount of the one contained; when the unsaturated acid contains both the unsaturated sulfonic acid and the unsaturated carboxylic acid, the total amount of the unsaturated sulfonic acid and the unsaturated carboxylic acid is the sum of the amount of the unsaturated sulfonic acid and the amount of the unsaturated carboxylic acid.
The preparation method of the functionalized polystyrene microsphere provided by the invention comprises the step of subjecting the polystyrene microsphere and a functionalized monomer to gamma-ray radiation and/or electron beam radiation in a dispersion medium, so that the functionalized monomer is polymerized and bonded to the surface of the polystyrene microsphere to form a polymer layer.
The conditions of the gamma-ray radiation and the electron beam radiation and the kind of the radiation source are not particularly limited in the present invention, as long as the functionalized monomer can be polymerized and bonded to the surface of the polystyrene microsphere to form a polymer layer, for example, the irradiation doses of the gamma-ray radiation and the electron beam radiation may be each independently 10 to 200 kGy; the illumination source may be60Co and/or electron accelerators.
In the present invention, the type of the dispersion medium is not particularly limited, and water is particularly preferable. In addition, in order to avoid the occurrence of oxygen inhibition as much as possible, the preparation method of the functionalized polystyrene microspheres preferably further comprises introducing nitrogen into the reaction system to remove oxygen, and then sealing.
The invention also provides application of the functionalized polystyrene microsphere in removing aluminum ions in an aluminum-containing water body.
In addition, the invention also provides a method for treating the water body containing aluminum, which comprises the step of introducing the water body containing aluminum into a column filled with the functionalized polystyrene microspheres to remove aluminum ions in the water body by an adsorption mode.
The method provided by the invention is suitable for treating various existing aluminum-containing water bodies, including neutral solutions containing aluminum, acidic solutions containing aluminum and the like, and is particularly suitable for treating acidic aqueous solutions containing aluminum (such as nitric acid aqueous solutions containing aluminum). When the aluminum-containing water body is an aluminum-containing nitric acid aqueous solution, [ H ] in the aluminum-containing water body+]Preferably 0.1 to 4mol/L, [ Al ]3+]Preferably 0.2 to 2 mol/L.
The conditions for the adsorption are not particularly limited in the present invention as long as the aluminum ions in the aluminum-containing water body can be removed to less than a desired value, for example, for [ H ]+]0.1 to 4mol/L and [ Al3+]The flow rate of the nitric acid solution is 0.1-2mol/L, the flow rate can be 40-80mL/min, and the retention time can be 5-30 min. In addition, in the adsorption process, in order to obtain better effect, the aluminum-containing water body is preferably passed through the adsorption column from top to bottom.
According to a specific embodiment of the invention, the method for treating the water body containing aluminum further comprises eluting and regenerating the functionalized polystyrene microspheres with an acidic solution when the functionalized polystyrene microspheres reach saturated adsorption, so that the functionalized polystyrene microspheres can be recycled, and the cost is reduced. The acidic solution may be, for example, a sulfuric acid solution, hydrochloric acid, nitric acid solution, or the like.
The present invention will be described in detail below by way of examples.
Example 1
(1) Preparing functionalized polystyrene microspheres:
A1L round bottom flask was charged with vinylphosphoric acid (30g), vinylsulfonic acid (30g), polystyrene microspheres (280g, particle size 0.5-3 μm), and deionized water (500mL), magnetically stirred, purged with nitrogen for 20 minutes to remove oxygen from the solution, and sealed. Followed byThen placing the round-bottom flask in60100kGy of radiation was applied under Co irradiation. After the irradiation was completed, the flask was opened, the mixture in the flask was packed into a column, and washed with deionized water to remove unreacted monomers and homopolymers for use. When installing the column, air bubbles should be prevented from remaining in the packing layer.
(2) Adsorption removal of aluminum ions in nitric acid aqueous solution:
nitric acid wastewater containing aluminum ions ([ H ]+]＝0.1-2mol/L，[Al3+]0.2-1.0mol/L) is introduced into a packed column from the top of the column at a flow rate of 60mL/min for adsorption exchange, and the retention time is 10 min. The effluent after the exchange adsorption is sequentially placed into 300 sample tubes (No. 1-300, 3 drops of each sample are added into 3mL of NaOH solution (0.2mol/L), obvious precipitation is found from the sample No. 82, and the result shows that Al is precipitated from the sample No. 823+In greater concentration, Al (OH) is produced3And (4) precipitating.
To accurately measure the concentration of each sample after the treatment, the sample was diluted 500 times with water and the aluminum ion concentration thereof was measured by ICP-AES (inductively coupled atomic emission spectrometer). The results are shown in FIG. 1, and it can be seen from FIG. 1 that the aluminum ion concentration remained low (less than 900ppm) until sample No. 50.
(3) Elution and regeneration of the adsorption resin:
an aqueous sulfuric acid solution ([ H ] is used+]5mol/L), specifically, 500mL of sulfuric acid aqueous solution (2-3 times of the volume of the resin) is introduced into the packed column from the top of the column at a flow rate of 60mL/min to flush the resin, the flushed water is sequentially placed into 300 sample tubes with the volume of 10mL, the concentration of aluminum ions in the flushed water changes as shown in FIG. 2, and as can be seen from FIG. 2, the concentration of aluminum ions in the regeneration solution is basically maintained unchanged at the 50 th sample, which indicates the end of elution. The resin after rinsing with aqueous sulfuric acid was then rinsed with deionized water to a pH of 5.36 and stored in deionized water until use.
(4) And (3) recycling the resin:
repeating the steps (2) and (3) five times, and the changes of the aluminum ion concentration in the obtained adsorption effluent and the regeneration solution effluent are shown in fig. 3 and 4, respectively. As can be seen from the results of FIGS. 3 and 4, the obtained results substantially agreed with those of the first treatment with the resin, and it can be seen that the resin had the ability to stably treat the aqueous nitric acid solution containing aluminum ions. In addition, the resin before the first use and after the last repeated use are respectively subjected to Fourier infrared tests, the obtained FT-IR spectrogram is shown in FIG. 5, and the result of FIG. 5 shows that the structure of the resin is still stable and basically does not change after the resin is used for multiple times.
Example 2
(1) Preparing functionalized polystyrene microspheres:
to a 1L round bottom flask were added vinylphosphoric acid (10g), vinylsulfonic acid (30g), acrylic acid (30g), polystyrene microspheres (280g, particle size 0.5-3 μm), and deionized water (500mL), magnetically stirred, purged with nitrogen for 20 minutes to remove oxygen from the solution, and sealed. The round bottom flask was then placed in60100kGy of radiation was applied under Co irradiation. After the irradiation was completed, the flask was opened, the mixture in the flask was packed into a column, and washed with deionized water to remove unreacted monomers and homopolymers for use. When installing the column, air bubbles should be prevented from remaining in the packing layer.
(2) Adsorption removal of aluminum ions in nitric acid aqueous solution:
nitric acid wastewater containing aluminum ions ([ H ]+]＝0.1-2mol/L，[Al3+]0.2-1.0mol/L) is introduced into a packed column from the top of the column at a flow rate of 60mL/min for adsorption exchange, and the retention time is 10 min. The effluent after the exchange adsorption is sequentially placed into 100 sample tubes (number 1-100) with the volume of 10mL, 3 drops of each sample are added into 3mL of NaOH solution (0.2mol/L), obvious precipitation is found from the No. 85 sample, and the result shows that Al begins from the No. 85 sample3+In greater concentration, Al (OH) is produced3And (4) precipitating.
To accurately measure the concentration of each sample after the treatment, the sample was diluted 500 times with water and the aluminum ion concentration thereof was measured by ICP-AES. The results show that the aluminum ion concentration remained low (less than 900ppm) until sample No. 55.
(3) Elution and regeneration of the adsorption resin:
an aqueous sulfuric acid solution ([ H ] is used+]5mol/L), specifically, 500mL of sulfuric acid aqueous solution (2-3 times of the volume of the resin) is introduced into the packed column from the top of the column at a flow rate of 60mL/min to flush the resin, and the flushed water is sequentially placed into 300 sample tubes with the volume of 10mL, and the result shows that the change of the concentration of aluminum ions in the regenerated solution is basically maintained unchanged at the 52 th sample, which indicates that the elution is finished. The resin after rinsing with aqueous sulfuric acid was then rinsed with deionized water to a pH of 5.36 and stored in deionized water until use.
(4) And (3) recycling the resin:
repeating the steps (2) and (3) five times, and the change results of the aluminum ion concentration in the obtained adsorption effluent and regeneration solution effluent are basically consistent with the results of the first treatment by using the resin, so that the resin has the capability of stably treating the aluminum ion-containing nitric acid aqueous solution. In addition, Fourier infrared tests are respectively carried out on the resin before the first use and after the last repeated use, and the results show that the structure of the resin is still stable and basically does not change after the resin is used for multiple times.
Example 3
(1) Preparing functionalized polystyrene microspheres:
to a 1L round bottom flask was added vinylphosphoric acid (20g), vinylsulfonic acid (20g), acrylic acid (20g), polystyrene microspheres (280g, particle size 0.5-3 μm), and deionized water (500mL), magnetically stirred, purged with nitrogen for 20 minutes to remove oxygen from the solution, and sealed. The round bottom flask was then placed in60100kGy of radiation was applied under Co irradiation. After the irradiation was completed, the flask was opened, the mixture in the flask was packed into a column, and washed with deionized water to remove unreacted monomers and homopolymers for use. When installing the column, air bubbles should be prevented from remaining in the packing layer.
(2) Adsorption removal of aluminum ions in nitric acid aqueous solution:
nitric acid wastewater containing aluminum ions ([ H ]+]＝0.1-2mol/L，[Al3+]0.2-1.0mol/L) is introduced into a packed column from the top of the column at a flow rate of 60mL/min for adsorption exchange, and then the adsorption exchange is stoppedThe retention time was 10 min. The effluent after the exchange adsorption is sequentially placed into 100 sample tubes (number 1-100) with the volume of 10mL, 3 drops of each sample are added into 3mL of NaOH solution (0.2mol/L), obvious precipitation is found from the No. 78 sample, and the result shows that Al begins from the No. 78 sample3+In greater concentration, Al (OH) is produced3And (4) precipitating.
To accurately measure the concentration of each sample after the treatment, the sample was diluted 500 times with water and the aluminum ion concentration thereof was measured by ICP-AES. The results show that the concentration of aluminum ions remained low (less than 900ppm) until sample No. 46.
(3) Elution and regeneration of the adsorption resin:
an aqueous sulfuric acid solution ([ H ] is used+]5mol/L), specifically, 500mL of sulfuric acid aqueous solution (2-3 times of the volume of the resin) is introduced into the packed column from the top of the column at a flow rate of 60mL/min to flush the resin, and the flushed water is sequentially placed into 300 sample tubes with the volume of 10mL, and the result shows that the concentration change of aluminum ions in the regeneration solution is basically maintained unchanged at the 48 th sample, which indicates that the elution is finished. The resin after rinsing with aqueous sulfuric acid was then rinsed with deionized water to a pH of 5.36 and stored in deionized water until use.
(4) And (3) recycling the resin:
repeating the steps (2) and (3) five times, and the change results of the aluminum ion concentration in the obtained adsorption effluent and regeneration solution effluent are basically consistent with the results of the first treatment by using the resin, so that the resin has the capability of stably treating the aluminum ion-containing nitric acid aqueous solution. In addition, Fourier infrared tests are respectively carried out on the resin before the first use and after the last repeated use, and the results show that the structure of the resin is still stable and basically does not change after the resin is used for multiple times.
Example 4
Functionalized polystyrene microspheres were prepared according to the method of example 1, the aluminum ions in the nitric acid aqueous solution were removed by adsorption, and the adsorbent resin was eluted and regenerated, except that in the preparation of the functionalized polystyrene microspheres, the irradiation source was irradiated from the irradiation source60Co was replaced with an electron beam and the radiation dose was 100 kGy. The results show that, in the adsorption removal process of aluminum ions, 3 drops of 3mL of NaOH solution (0.2mol/L) were added from sample No. 78, and obvious precipitation appeared at the beginning, indicating that Al was precipitated from sample No. 783+In greater concentration, Al (OH) is produced3And (4) precipitating. In addition, the ICP-AES analysis showed that the concentration of aluminum ions remained low (less than 900ppm) until sample No. 47.
Example 5
The functionalized polystyrene microspheres were prepared according to the method of example 1, the adsorption of aluminum ions in the nitric acid aqueous solution was removed, and the elution of the adsorption resin was regenerated, except that in the preparation of the functionalized polystyrene microspheres, the same weight of vinylphosphoric acid was used instead of vinylsulfonic acid. The results show that 3 drops of 3mL NaOH solution (0.2mol/L) were added to the sample No. 50 during the adsorption removal process of aluminum ions, and obvious precipitation appeared at the beginning, indicating that Al was precipitated from the sample No. 503+In greater concentration, Al (OH) is produced3And (4) precipitating. In addition, the ICP-AES analysis showed that the concentration of aluminum ions remained low (less than 900ppm) until sample No. 35.
Comparative example 1
The method of example 4 was followed to remove aluminum ions from the aqueous nitric acid solution and regenerate the adsorbent resin by elution, except that the functionalized polystyrene microspheres were replaced with unmodified polystyrene microspheres. The results show that, in the adsorption removal process of aluminum ions, 3 drops of 3mL of NaOH solution (0.2mol/L) were added from sample No. 5, and obvious precipitation appeared at the beginning, indicating that Al was precipitated from sample No. 53+In greater concentration, Al (OH) is produced3And (4) precipitating. In addition, the ICP-AES analysis showed that the concentration of aluminum ions remained low (less than 900ppm) until sample No. 2.
Comparative example 2
The method of example 5 is followed to remove the aluminum ions in the nitric acid aqueous solution by adsorption and regenerate the adsorption resin, except that the functionalized polystyrene microspheres are modified by thermal initiation of the initiator instead of radiation, and the specific steps are as follows: adding into a 1L round-bottom flaskVinyl phosphoric acid (60g), polystyrene microspheres (280g, particle size 0.5-3 μm), deionized water (500mL), and 50mg of azobisisobutyronitrile were added, magnetically stirred, purged with nitrogen for 20 minutes to remove oxygen from the solution, and sealed. The round bottom flask was then heated to 90 ℃ for 300 min. After the reaction is finished, the flask is opened, the mixture in the flask is filled into a column, the column is washed by deionized water to remove unreacted monomers and homopolymers for later use, and bubbles are prevented from remaining in a packing layer when the column is filled. The results show that 3 drops of 3mL NaOH solution (0.2mol/L) were added to the sample No. 8 during the adsorption removal process of aluminum ions, and obvious precipitation appeared at the beginning, indicating that Al was precipitated from the sample No. 83+In greater concentration, Al (OH) is produced3And (4) precipitating. In addition, the ICP-AES analysis showed that the concentration of aluminum ions remained low (less than 900ppm) until sample No. 3.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (8)
1. A method for treating an aluminum-containing water body is characterized by comprising the steps of introducing the aluminum-containing water body into a column filled with functionalized polystyrene microspheres, and removing aluminum ions in the aluminum-containing water body in an adsorption mode; the functionalized polystyrene microsphere is prepared by gamma-ray radiation and/or electron beam radiation, and comprises a polystyrene microsphere and a polymer layer which is bonded to the surface of the polystyrene microsphere and is obtained by polymerizing a functionalized monomer, wherein the functionalized monomer is unsaturated acid; the unsaturated acid is a mixture of unsaturated phosphoric acid and unsaturated sulfonic acid and/or unsaturated carboxylic acid; the weight ratio of the using amount of the unsaturated phosphoric acid to the total using amount of the unsaturated sulfonic acid and the unsaturated carboxylic acid is 1 (1-6); the unsaturated phosphoric acid is selected from at least one of vinyl phosphoric acid and propenyl phosphoric acid; the unsaturated sulfonic acid is selected from at least one of vinyl sulfonic acid and methacrylic sulfonic acid; the unsaturated carboxylic acid is acrylic acid and/or methacrylic acid.
2. The treatment method according to claim 1, wherein the aluminum-containing water body is an aluminum-containing nitric acid aqueous solution.
3. The treatment method according to claim 2, wherein [ H ] is contained in the aqueous nitric acid solution containing aluminum+]0.1-4mol/L, [ Al ]3+]Is 0.1-2 mol/L.
4. The process of any one of claims 1 to 3, further comprising eluting and regenerating the functionalized polystyrene microspheres with an acidic solution when they reach saturation adsorption.
5. The method of any one of claims 1 to 3, wherein the polymer layer is contained in an amount of 1 to 50 parts by weight with respect to 100 parts by weight of the polystyrene microspheres.
6. The process of any one of claims 1 to 3, wherein the polystyrene microspheres have a particle size of 0.2 to 5 μm.
7. The process of any one of claims 1 to 3, wherein the polystyrene microspheres are prepared according to the following method: subjecting the polystyrene microspheres and a functionalized monomer to gamma-ray radiation and/or electron beam radiation in a dispersion medium so that the functionalized monomer is polymerized and bonded to the surfaces of the polystyrene microspheres to form a polymer layer.
8. The treatment method according to claim 7, wherein the irradiation doses of the γ -ray radiation and the electron beam radiation are each independently 10 to 200 kGy; the radiation source is60Co and/or electron accelerators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810946457.XA CN109265613B (en) | 2018-08-20 | 2018-08-20 | Functionalized polystyrene microsphere and preparation method and application thereof |
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| CN112341558B (en) * | 2020-10-29 | 2023-01-24 | 深圳市优宝新材料科技有限公司 | Polymer microsphere, preparation method thereof and lubricating grease composition |
| CN115141319B (en) * | 2022-06-27 | 2023-07-07 | 厦门大学 | Engineered radioactive polymer microsphere and preparation method and application thereof |
| CN115676837B (en) * | 2022-10-09 | 2024-01-09 | 胜华新材料集团股份有限公司 | Preparation method of copper-doped porous carbon silica composite material, composite material and application |
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