CN112604674B - Fiber-based adsorption material, preparation method thereof and removal of trivalent chromium in water body - Google Patents
Fiber-based adsorption material, preparation method thereof and removal of trivalent chromium in water body Download PDFInfo
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- CN112604674B CN112604674B CN202011439163.1A CN202011439163A CN112604674B CN 112604674 B CN112604674 B CN 112604674B CN 202011439163 A CN202011439163 A CN 202011439163A CN 112604674 B CN112604674 B CN 112604674B
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- 239000000835 fiber Substances 0.000 title claims abstract description 114
- 239000000463 material Substances 0.000 title claims abstract description 81
- 239000011651 chromium Substances 0.000 title claims abstract description 40
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 35
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims abstract description 36
- 239000004743 Polypropylene Substances 0.000 claims abstract description 25
- -1 polypropylene Polymers 0.000 claims abstract description 25
- 229920001155 polypropylene Polymers 0.000 claims abstract description 25
- 239000002351 wastewater Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 28
- 238000005406 washing Methods 0.000 claims description 28
- 239000003463 adsorbent Substances 0.000 claims description 27
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 24
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 18
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 16
- VVJKKWFAADXIJK-UHFFFAOYSA-N Allylamine Chemical compound NCC=C VVJKKWFAADXIJK-UHFFFAOYSA-N 0.000 claims description 16
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical compound C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 claims description 16
- 230000001678 irradiating effect Effects 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 13
- 238000011282 treatment Methods 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 238000010894 electron beam technology Methods 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 6
- WEPXLRANFJEOFZ-UHFFFAOYSA-N 2,3,4-trifluorobenzoic acid Chemical compound OC(=O)C1=CC=C(F)C(F)=C1F WEPXLRANFJEOFZ-UHFFFAOYSA-N 0.000 claims description 5
- SNGREZUHAYWORS-UHFFFAOYSA-N perfluorooctanoic acid Chemical compound OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F SNGREZUHAYWORS-UHFFFAOYSA-N 0.000 claims description 5
- 229910001430 chromium ion Inorganic materials 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 238000002329 infrared spectrum Methods 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 4
- 125000003277 amino group Chemical group 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009296 electrodeionization Methods 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000003480 eluent Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 230000004584 weight gain Effects 0.000 description 1
- 235000019786 weight gain Nutrition 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides a fiber-based adsorption material, which is prepared by taking polypropylene as a matrix, firstly introducing amino in an irradiation grafting manner and then chemically grafting. The surface of the adsorption material prepared by the invention has stronger electrostatic attraction, and the deep removal of trivalent chromium in the water body can be realized. The preparation method is simple and suitable for industrial production. The method has the advantages of low operation cost, simple operation and stable operation, and the adsorbing material can be regenerated and recycled, so that the discharge of the trivalent chromium-containing wastewater reaching the standard can be realized, and the chromium ions in the wastewater can be recovered, thereby realizing the resource utilization of the trivalent chromium-containing wastewater.
Description
Technical Field
The invention belongs to the field of heavy metal wastewater treatment, and particularly relates to a fiber-based adsorption material, a preparation method thereof and removal of trivalent chromium in a water body.
Background
A series of dyeing treatments exist in industries such as tanning, metal processing, electroplating and the like, and due to the wide use of heavy metal-containing dyes, a large amount of produced dyeing wastewater contains a large amount of heavy metal pollutants, wherein chromium is the most toxic and is the most difficult to treat. Because chromium belongs to the first category of priority control pollutants, the national environmental protection standard requires separate diversion chromium removal treatment, if the chromium is not treated or is not treated, the chromium is discharged, river water and underground water are seriously polluted, farmland and human health are harmed, and huge harm is generated to ecological environment and human survival. Therefore, it is important to study the treatment of chromium-containing wastewater. The chromium-containing wastewater is treated by a plurality of methods, and currently, an electrolytic method, a chemical method, an ion exchange method, a membrane separation method and the like are commonly used. Wherein, the chemical method needs to add excessive medicament to easily cause secondary pollution and generate large amount of sludge. The ion exchange method is to use the high molecular synthetic resin to exchange ions with chromium in the wastewater, and has the disadvantages of high cost, complex operation management, difficult resin regeneration and short service life. The membrane separation method has the problems of electrodialysis, reverse osmosis, electrodeionization and the like, the service life and the cost of the membrane are still in the stage of research and trial, the electrolysis method is widely applied due to the characteristics of small volume, small occupied area, low power consumption, convenient management, good effect and the like, but the chromium-containing wastewater treated by the electrolysis technology is difficult to reach the discharge standard, the energy consumption is increased linearly for the wastewater with lower chromium concentration, and the method is not economical and feasible from the cost perspective.
Disclosure of Invention
The invention aims to overcome the defects of high treatment cost of chromium-containing wastewater, difficult resin regeneration and short service life in the prior art, and provides a fiber-based adsorbing material (material A) which can adsorb trivalent chromium in an aqueous solution and has higher adsorption rate and longer service life compared with the adsorbing material in the prior art.
Except for special description, the parts are parts by weight, and the percentages are mass percentages.
The invention adopts the following technical scheme:
a fiber-based adsorption material (material A) is characterized in that the fiber-based adsorption material is prepared by the reaction of amino fiber and perfluorooctanoic acid under the action of a condensing agent Dicyclohexylcarbodiimide (DCC) for 8-16h at the temperature of 50-80 ℃; the amino fiber is prepared by irradiation grafting of polypropylene.
Further, the amino fiber adopts the following preparation method: (1) pretreatment: washing polypropylene with acetone, then washing with deionized water, and drying at 50 ℃ for later use; (2) pre-irradiation: pre-irradiating the polypropylene fiber in air for 6h by adopting an electron beam, wherein the irradiation step is completed by adopting an ELV-8 type electron accelerator; (3) irradiation grafting: weighing 10g of pre-irradiated fiber, placing the fiber in a 100mL flask, adding 50mL of mixed solution of methanol and allyl amine (V/V = 1), irradiating and grafting for 4h at 50 ℃, and washing with ethanol after the reaction is finished, thus obtaining the amino fiber of the invention.
According to a second aspect of the present invention, the present invention provides a method for producing the above-described fiber-based adsorbent material (material a).
The preparation method of the fiber-based adsorption material (material A) adopts the following steps:
(1) Pretreatment: washing polypropylene with acetone, then washing with deionized water, and drying at 50 ℃ for later use;
(2) Pre-irradiation: pre-irradiating the polypropylene fiber in air for 6 hours by adopting an electron beam, wherein the irradiation step is completed by adopting an ELV-8 type electron accelerator;
(3) Irradiation grafting: weighing 10g of pre-irradiated fiber, placing the fiber in a 100mL flask, adding 50mL of a mixed solution of methanol and allyl amine (V/V = 1), irradiating and grafting the fiber for 4h at 50 ℃, and washing the fiber by using ethanol after the reaction is finished to obtain amino fiber;
(4) Chemical grafting: dissolving amino fiber by using N, N-Dimethylformamide (DMF), then adding perfluorooctanoic acid and a condensing agent Dicyclohexylcarbodiimide (DCC), reacting for 12 hours at the temperature of 60 ℃, fully washing by using ethanol after the reaction is finished, and drying at the temperature of 50 ℃ to obtain the fiber-based adsorbing material.
According to a third aspect of the invention, the invention provides the use of the above-described fibre-based adsorption material (material a) in the treatment of trivalent chromium-containing waste water.
According to a fourth aspect of the present invention, the present invention provides a fiber-based adsorbent material (material B) that adsorbs trivalent chromium in aqueous solutions with higher adsorption rates and lifetimes relative to prior art adsorbent materials.
A fiber-based adsorption material (material B) is characterized in that the fiber-based adsorption material is prepared by the reaction of amino fiber and trifluorobenzoic acid for 10-18h at the temperature of 50-80 ℃ under the action of a condensing agent Dicyclohexylcarbodiimide (DCC);
the preparation method of the amino fiber is the same as that of the amino fiber, and the amino fiber is prepared by polypropylene irradiation grafting.
According to a fifth aspect of the present invention, there is provided a method for producing the above-mentioned fiber-based adsorbent material (material B).
The preparation method of the fiber-based adsorbing material (material B) adopts the following steps:
(1) Pretreatment: washing polypropylene with acetone, then washing with deionized water, and drying at 50 ℃ for later use;
(2) Pre-irradiation: pre-irradiating the polypropylene fiber in air for 6h by adopting an electron beam, wherein the irradiation step is completed by adopting an ELV-8 type electron accelerator;
(3) Irradiation grafting: weighing 10g of pre-irradiated fiber, placing the fiber in a 100mL flask, adding 50mL of mixed solution of methanol and allyl amine (V/V = 1), irradiating and grafting for 4h at 50 ℃, and washing with ethanol after the reaction is finished to obtain amino fiber;
(4) Chemical grafting: dissolving amino fiber with N, N-Dimethylformamide (DMF), adding trifluorobenzoic acid and a condensing agent Dicyclohexylcarbodiimide (DCC), reacting for 16h at 60 ℃, fully washing with ethanol after the reaction is finished, and drying at 50 ℃ to obtain the fiber-based adsorbing material.
According to a sixth aspect of the present invention, the present invention provides the use of the above-described fiber-based adsorbing material (material B) in the treatment of wastewater containing trivalent chromium.
Has the advantages that:
the invention provides a fiber-based adsorption material, which is prepared by taking polypropylene as a matrix, firstly introducing amino in an irradiation grafting manner and then chemically grafting. The surface of the adsorption material prepared by the invention has stronger electrostatic attraction, and the deep removal of trivalent chromium in a water body can be realized. The preparation method is simple and suitable for industrial production. The method has the advantages of low operation cost, simple operation and stable operation, and the adsorbing material can be regenerated and recycled, so that the trivalent chromium-containing wastewater can be discharged up to the standard, and the chromium ions in the wastewater can be recovered, thereby realizing the resource utilization of the trivalent chromium-containing wastewater.
Drawings
FIG. 1 is a scanning electron micrograph of a commercial polypropylene;
FIG. 2 is a scanning electron micrograph of a fiber-based adsorbent material (Material A) prepared in example 2;
FIG. 3 is an infrared spectrum of the fiber-based adsorbent material (Material A) prepared in example 2;
FIG. 4 is a scanning electron micrograph of a fiber-based adsorbent material (Material B) prepared in example 3;
FIG. 5 is an infrared spectrum of the fiber-based adsorbent material (material B) prepared in example 3;
FIG. 6 is a statistical chart of the adsorption capacity of the fiber-based adsorbent (Material A) as an adsorbent for trivalent chromium in wastewater in example 4;
FIG. 7 is a statistical chart of the adsorption capacity of the fiber-based adsorbent (Material B) as an adsorbent for trivalent chromium in wastewater in example 5.
Detailed Description
The present invention is described in detail below with reference to specific examples, which are given for the purpose of further illustrating the invention and are not to be construed as limiting the scope of the invention, and the invention may be modified and adapted by those skilled in the art in light of the above disclosure. The raw materials and reagents used in the invention are all commercial products.
Example 1
Preparation of amino fibres
(1) The pretreatment method comprises the following steps: commercial polypropylene (9 mm, from the firm-maturing Xibo fiber Co., ltd.) was washed with acetone several times, then washed with deionized water several times, and then dried at 50 ℃ for use.
(2) Pre-irradiation: before introducing amino group by irradiation grafting, the polypropylene fiber is pre-irradiated for 6h in the air by adopting an electron beam, and the irradiation step is completed by adopting an ELV-8 type electron accelerator.
(3) Irradiation grafting (amino is introduced on the surface of the fiber to form amino fiber): weighing 10g of pre-irradiated fiber, placing the fiber in a 100mL flask, adding 50mL of mixed solution of methanol and allyl amine (V/V = 1), irradiating and grafting for 4h at 50 ℃, washing the fiber for multiple times by using ethanol after the reaction is finished, and removing unreacted raw materials to obtain amino fiber, wherein the weight gain rate is about 15%.
Example 2
Preparation of fiber-based adsorbent Material (Material A)
Weighing 10g of amino fiber prepared according to the method in the embodiment 1, placing the amino fiber in a 100ml three-neck flask, adding 50ml of N, N-Dimethylformamide (DMF), adding 4.3g of perfluorooctanoic acid and 1.0g of Dicyclohexylcarbodiimide (DCC), reacting for 12h at 60 ℃, fully washing with ethanol after the reaction is finished, and drying at 50 ℃ to obtain the target product, namely the fiber-based adsorption material (material A). The scanning electron microscope of the fiber-based adsorbent material (material a) fiber prepared in example 2 is shown in fig. 2, and the fiber is significantly different from the scanning electron microscope of the commercial polypropylene (fig. 1). The IR spectrum of the fiber-based adsorbent material (material A) prepared in example 2 is shown in FIG. 3, and it is apparent from the IR spectrum that amino groups, carbonyl groups and fluorine-containing groups were introduced.
Example 3
Preparation of fiber-based adsorbent Material (Material B)
Weighing 10g of amino fiber prepared according to the method in the embodiment 1, placing the amino fiber in a 100ml three-neck flask, adding 50ml of N, N-Dimethylformamide (DMF), adding 5.5g of trifluorobenzoic acid and 1.0g of Dicyclohexylcarbodiimide (DCC) to react for 16h at the temperature of 60 ℃, fully washing the amino fiber with ethanol after the reaction is finished, and drying the amino fiber at the temperature of 50 ℃ to obtain a target product, namely a fiber-based adsorption material (material B). The scanning electron microscope of the fiber-based adsorbent material (material B) fiber prepared in example 3 is shown in fig. 4, and the fiber is significantly different from the scanning electron microscope of commercial polypropylene (fig. 1). The infrared spectrum of the fiber-based adsorbent material (material B) prepared in example 3 is shown in FIG. 5, and it is apparent from the infrared spectrum that amino groups, carbonyl groups and fluorine-containing groups were introduced.
Example 4
2.0g of the fiber-based adsorbent material (material A) prepared according to the method of example 2 was weighed as a fiber adsorbent material, and loaded in an adsorption column having a diameter of 10mm and a height of 10cm, and subjected to Cr-containing adsorption in a manner of bottom-in-top-out 3+ And (5) carrying out adsorption treatment on the aqueous solution. The adsorption results are shown in table 1 below; for Cr 3+ Maximum dynamic adsorption capacity ofAs shown in FIG. 6, for Cr 3+ The maximum dynamic adsorption capacity of the catalyst can reach 218mg/g, and Cr in effluent liquid 3+ The content is less than 0.3ppm, and reaches Cr in the sewage discharge standard 3+ And (4) requiring.
TABLE 1 Cr in the effluent at different adsorption times 3+ Concentration of
Example 5
2.0g of the fiber-based adsorbing material (material B) prepared according to the method of example 3 was weighed as a fiber adsorbing material, and the fiber adsorbing material was filled in an adsorbing column having a diameter of 10mm and a height of 10cm, and the adsorption column containing Cr was aligned in a manner of bottom-in and top-out 3+ And (5) carrying out adsorption treatment on the aqueous solution. The adsorption results are shown in table 2 below; for Cr 3+ The maximum dynamic adsorption capacity of (d) is shown in fig. 7.
TABLE 2 Cr in the effluent at different adsorption times 3+ Concentration of
The material is used for treating Cr under the condition that 1.5mol/L hydrochloric acid is used as an eluent 3+ The maximum dynamic saturated adsorption capacity can reach 192mg/g and can reach 184mg/g after repeated use for 6 times, and the Cr in the effluent liquid 3+ The content is less than 0.3ppm, and reaches Cr in the sewage discharge standard 3+ The requirements of (1).
Claims (8)
1. A fiber-based adsorbent material, characterized by: the fiber-based adsorption material is prepared by the reaction of amino fiber and 4.3g of perfluorooctanoic acid under the action of 1.0g of condensing agent dicyclohexylcarbodiimide at the temperature of 50-80 ℃ for 8-16 h; the amino fiber is prepared by irradiation grafting of polypropylene.
2. The fiber-based adsorbent material according to claim 1, wherein said amino fiber is prepared by the steps of: (1) pretreatment: washing polypropylene with acetone, then washing with deionized water, and drying at 50 ℃ for later use; (2) pre-irradiation: pre-irradiating the polypropylene fiber in air for 6 hours by adopting an electron beam, wherein the irradiation step is completed by adopting an ELV-8 type electron accelerator; (3) irradiation grafting: weighing 10g of pre-irradiated fiber, placing the fiber in a 100mL flask, adding 50mL of mixed solution of methanol and allyl amine, irradiating and grafting for 4h at 50 ℃, and washing by using ethanol after the reaction is finished to obtain the amino fiber.
3. A method of preparing a fibre-based adsorbent material according to claim 1 or 2, using the steps of:
(1) Pretreatment: washing polypropylene with acetone, then washing with deionized water, and drying at 50 ℃ for later use;
(2) Pre-irradiation: pre-irradiating the polypropylene fiber in air for 6 hours by adopting an electron beam, wherein the irradiation step is completed by adopting an ELV-8 type electron accelerator;
(3) Irradiation grafting: weighing 10g of pre-irradiated fiber, placing the fiber in a 100mL flask, adding 50mL of mixed solution of methanol and allyl amine, carrying out irradiation grafting for 4h at 50 ℃, and washing the fiber by using ethanol after the reaction is finished to obtain amino fiber;
(4) Chemical grafting: dissolving amino fiber with N, N-dimethylformamide, adding perfluorooctanoic acid and a condensing agent dicyclohexylcarbodiimide, reacting for 12h at 60 ℃, fully washing with ethanol after the reaction is finished, and drying at 50 ℃ to obtain the fiber-based adsorbing material.
4. Use of a fiber-based adsorbent material according to claim 1 or 2 for the treatment of trivalent chromium containing waste water.
5. A fiber-based adsorption material is characterized in that the adsorption material is prepared by the reaction of amino fiber and 5.5g of trifluorobenzoic acid under the action of 1.0g of condensing agent dicyclohexylcarbodiimide at the temperature of 50-80 ℃ for 10-18 h; the amino fiber is prepared by polypropylene irradiation grafting.
6. The fiber-based adsorbent material according to claim 5, wherein said amino fiber is prepared by: (1) pretreatment: washing polypropylene with acetone, then washing with deionized water, and drying at 50 ℃ for later use; (2) pre-irradiation: pre-irradiating the polypropylene fiber in air for 6h by adopting an electron beam, wherein the irradiation step is completed by adopting an ELV-8 type electron accelerator; (3) irradiation grafting: weighing 10g of pre-irradiated fiber, placing the fiber in a 100mL flask, adding 50mL of mixed solution of methanol and allyl amine, irradiating and grafting for 4h at 50 ℃, and washing by using ethanol after the reaction is finished to obtain the amino fiber.
7. A method of preparing a fibre-based adsorbent material according to claim 5 or 6, using the steps of:
(1) Pretreatment: washing polypropylene with acetone, then washing with deionized water, and drying at 50 ℃ for later use;
(2) Pre-irradiation: pre-irradiating the polypropylene fiber in air for 6 hours by adopting an electron beam, wherein the irradiation step is completed by adopting an ELV-8 type electron accelerator;
(3) Irradiation grafting: weighing 10g of pre-irradiated fiber, placing the fiber in a 100mL flask, adding 50mL of mixed solution of methanol and allyl amine, irradiating and grafting for 4h at 50 ℃, and washing by using ethanol after the reaction is finished to obtain amino fiber;
(4) Chemical grafting: dissolving amino fiber with N, N-dimethylformamide, adding trifluorobenzoic acid and a condensing agent dicyclohexylcarbodiimide, reacting for 16h at 60 ℃, fully washing with ethanol after the reaction is finished, and drying at 50 ℃ to obtain the fiber-based adsorbing material.
8. Use of a fiber-based adsorbent material according to claim 5 or 6 for the treatment of wastewater containing trivalent chromium.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102040713A (en) * | 2009-10-23 | 2011-05-04 | 中国科学院上海应用物理研究所 | Graft modified polymer material and preparation method thereof |
| CN104018346A (en) * | 2014-05-26 | 2014-09-03 | 浙江工商大学 | Synthetic method of chelating fiber with selective adsorption on Cr (VI) |
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