CN113457646A - Preparation method of modified fiber ball and application of modified fiber ball in absorbing Congo red - Google Patents
Preparation method of modified fiber ball and application of modified fiber ball in absorbing Congo red Download PDFInfo
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- CN113457646A CN113457646A CN202110787868.0A CN202110787868A CN113457646A CN 113457646 A CN113457646 A CN 113457646A CN 202110787868 A CN202110787868 A CN 202110787868A CN 113457646 A CN113457646 A CN 113457646A
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- 239000000835 fiber Substances 0.000 title claims abstract description 195
- IQFVPQOLBLOTPF-HKXUKFGYSA-L congo red Chemical compound [Na+].[Na+].C1=CC=CC2=C(N)C(/N=N/C3=CC=C(C=C3)C3=CC=C(C=C3)/N=N/C3=C(C4=CC=CC=C4C(=C3)S([O-])(=O)=O)N)=CC(S([O-])(=O)=O)=C21 IQFVPQOLBLOTPF-HKXUKFGYSA-L 0.000 title claims abstract description 75
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229920000728 polyester Polymers 0.000 claims abstract description 88
- 239000003513 alkali Substances 0.000 claims abstract description 53
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 32
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000002791 soaking Methods 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 16
- 231100000719 pollutant Toxicity 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 9
- 239000000243 solution Substances 0.000 description 114
- 239000000975 dye Substances 0.000 description 19
- 238000011282 treatment Methods 0.000 description 15
- 238000001179 sorption measurement Methods 0.000 description 9
- 239000003463 adsorbent Substances 0.000 description 8
- 239000012670 alkaline solution Substances 0.000 description 8
- 239000000987 azo dye Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 238000005273 aeration Methods 0.000 description 4
- 125000003277 amino group Chemical group 0.000 description 4
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 4
- 239000004519 grease Substances 0.000 description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 231100000086 high toxicity Toxicity 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009967 direct dyeing Methods 0.000 description 1
- 239000010919 dye waste Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 229910001676 gahnite Inorganic materials 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 231100000171 higher toxicity Toxicity 0.000 description 1
- 231100000003 human carcinogen Toxicity 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28019—Spherical, ellipsoidal or cylindrical
-
- 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
- B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
-
- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28023—Fibres or filaments
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
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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 discloses a preparation method of modified fiber balls, which comprises the following steps: s1, putting an alkali solution with the concentration of 8% -11% in a container, soaking the polyester fiber balls in the alkali solution in the container, and soaking the polyester fiber balls in the alkali solution for 3.5h-4.5h at the temperature of 25-40 ℃; and S2, taking the polyester fiber balls out of the alkali solution and washing the polyester fiber balls for three times by pure water. The invention also provides application of the Congo red absorbed by the modified fiber balls. In the invention, the polyester fiber ball is subjected to soaking pretreatment by using the alkali solution, so that pollutants on the surface of the polyester fiber ball are removed, and the surface of the polyester fiber ball treated by the alkali solution is smoother. And then the polyester fiber balls are reacted with beta-CD and a silane coupling agent to realize effective composition of the beta-CD and the silane coupling agent and the polyester fiber balls, the polyester fiber balls containing the beta-CD and the silane coupling agent enhance the electron supply capability of the fiber balls, and the removal effect of the dye is improved.
Description
Technical Field
The invention relates to the technical field of fiber balls, in particular to a preparation method of a modified fiber ball and application of the modified fiber ball in absorbing Congo red.
Background
The dye wastewater has complex components, deep color, high toxicity, strong pH value, high salt content and the like, can cause the reduction of water transparency, photosynthesis weakening and biodegradability, and even if a small amount of residual dye is discharged into the water body environment, the color of the water body can also be obviously changed, thus being an important pollutant which harms aquatic animals and plants and human health. In the formation of dye waste water, the variety of dyes is various, and azo dyes are important ones. It is a dye capable of direct dyeing and has various chromogenic groups (-N-, -N-O-) and polar groups (-SO)3Na，-OH，-NH2) Etc. the dosage of the dye is more than 80 percent of the total amount of the dye used in China. Because the azo dye has strong water solubility and complex components, the removal of the azo dye is difficult. For example, congo red is a typical anionic azo dye, has a molecular formula of C32H22N6Na2O6S2, has the characteristics of high toxicity, deep chromaticity, high chemical oxygen demand and the like, and can generate aromatic amine substances with higher toxicity in an oxygen-deficient environment. Secondly, the metabolite benzidine has also been shown to be a human carcinogen. At present, the treatment of Congo red wastewater is receiving wide attention.
The method for treating congo red comprises the following steps: chemical treatment, biological treatment, physical treatment, and combinations thereof. The specific application method comprises the following steps: coagulation-flocculation method, biological treatment, membrane filtration, catalysis, adsorption method, etc. However, each method has significant disadvantages: the coagulation process results in the production of large amounts of sludge; the biological method has poor toxicity resistance, insufficient degradation of organic matters, slow treatment efficiency and undesirable effect; the membrane treatment cost is high and the membrane is irreversible after pollution; the photocatalytic oxidation efficiency is high, but the catalyst is easy to inactivate, and the method has lower popularity in engineering; the adsorption method is a classic water treatment method, has the advantages of simple operation, high efficiency and the like, is widely used, but the adsorbent also has the problems of poor reproducibility, difficult recovery and the like, and the development of a high-efficiency adsorbent material is one of the most effective methods for realizing cost economy. At present, the preparation research of the adsorbent is very wide, and the application effect is better, for example, the maximum adsorption capacity of Congo red treated by preparing a ring adsorbent by Fan, Mao and the like reaches 138.5 mg/g; habibi et al synthesized Ce-doped ZnAl2O4 composite material by coprecipitation method has removal rate of Congo red up to 83.88%; eltaweil et al synthesized a novel adsorbent composite material with a Congo red adsorption capacity of up to 1265.82 mg/g; however, the above research is an adsorbent prepared from pure chemical substances, which is relatively high in cost, and how to effectively combine the adsorbent with engineering environment in engineering application, and optimizing the engineering environment of the adsorbent application is a content worth of intensive research.
The fiber ball is an ideal water treatment filtering and adsorbing material and has strong physicochemical properties, such as strong corrosion resistance, high temperature resistance, high pressure resistance and the like. Under the condition of high compression, the fiber filaments are physically mixed to form a fiber ball material, so that suspended matters can be effectively intercepted. At present, the research on treating organic wastewater by fiber balls is deficient, and the treatment of Congo red wastewater is rarely reported. In addition, how to effectively apply the fiber balls to the treatment of organic wastewater also has important difficulties: the theoretical basis for adsorption for contaminant removal by means of an effective medium is generally closely related to the size of the specific surface area, which is an extremely disadvantageous aspect of application, and the specific surface area of the fiber spheres is widely recognized to be small.
At present, research on the application of the fiber balls in removing water pollutants is less, and the specific surface area of the fiber balls is small, so that the significance of realizing efficient targeted removal of the pollutants through adjustment of the surface structure of the fiber balls is important. The research proposes that the aim of removing the azo dye Congo red liquid in a targeted manner is achieved by adopting the effects of surface static electricity, hydrogen bonds and the like of the reinforced fiber balls, and the research contents are very clear.
Disclosure of Invention
The invention aims to provide a preparation method of a modified fiber ball and application of the modified fiber ball in absorbing Congo red, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of modified fiber balls comprises the following steps:
s1, putting an alkali solution with the concentration of 8% -11% into a container, soaking the polyester fiber balls in the alkali solution in the container, and soaking the polyester fiber balls in the alkali solution for 3.5-4.5 hours at the temperature of 25-40 ℃;
s2, taking the polyester fiber balls out of the alkali solution and washing the polyester fiber balls for three times by pure water;
s3, mixing 8% -11% of beta-CD in 0.05% -0.15% of silane coupling agent to prepare a solution A, mixing the cleaned fiber balls in the solution A, and reacting the fiber balls in the solution A for 2.5-3.5h at the temperature of 35-44 ℃;
and S4, taking the fiber balls out of the solution A, and putting the fiber balls in an oven for drying to obtain the modified fiber balls.
Preferably, the temperature for drying the fiber balls in the oven is 55-65 ℃;
the invention also provides an application of the modified fiber ball in absorbing Congo red, which comprises the following steps:
a1, preparing a Congo red solution with the concentration of 450-;
a2, adjusting the pH value of the Congo red solution by using NaOH with the concentration of 0.2-0.8mol/L and HCl with the concentration of 0.2-0.8mol/L to ensure that the pH value of the Congo red solution is 5-9;
and A3, filling the modified fiber balls into a container, pouring the Congo red solution with the pH value of 5-9 obtained in the step A2 into the container, taking the liquid in the container every two hours, and detecting the residual concentration of the Congo red in the sample.
Preferably, the fiber balls are put into the Congo red solution in an amount of 45-55 g/L.
Preferably, the dissolved oxygen of the Congo red solution in the container in step A3 is 8-9 mg/L.
Compared with the prior art, the invention has the beneficial effects that: in the invention, the polyester fiber balls are soaked by using the alkali solution, pollutants on the surfaces of the polyester fiber balls can be removed by using the alkali solution, the surfaces of the polyester fiber balls after being treated by the alkali solution are smoother, and then the polyester fiber balls are reacted with the beta-CD and the silane coupling agent to compound the beta-CD and the silane coupling agent with the polyester fiber balls, so that the electron supply capability of the polyester fiber balls containing the beta-CD and the silane coupling agent is enhanced, and the removal effect of the dye is improved.
Detailed Description
The invention is further illustrated by the following examples.
Example 1
The invention provides a technical scheme that: a preparation method of modified fiber balls comprises the following steps:
s1, putting an alkali solution with the concentration of 8% into a container, soaking the polyester fiber balls in the alkali solution in the container, and soaking the polyester fiber balls in the alkali solution for 3.5 hours at the temperature of 25 ℃; the polyester fiber balls are soaked by the alkaline solution, and pollutants such as grease and the like on the surfaces of the polyester fiber balls can be removed by the alkaline solution.
S2, taking the polyester fiber balls out of the alkali solution and washing the polyester fiber balls for three times by pure water; the surface of the polyester fiber ball treated by the alkali solution is stripped, and the pollutants can be thoroughly separated from the surface of the polyester fiber ball by using a mode of repeatedly cleaning with pure water, so that the surface of the polyester fiber ball treated by the alkali solution is smoother.
S3, mixing 8% beta-CD in 0.05% silane coupling agent to obtain solution A, mixing the cleaned fiber balls in the solution A, and reacting the fiber balls in the solution A for 2.5 hours at the temperature of 35 ℃; and (3) compounding the beta-CD and the silane coupling agent on the surface of the polyester fiber ball at a proper temperature.
And S4, taking the fiber balls out of the solution A, and putting the fiber balls in an oven for drying to obtain the modified fiber balls. The temperature when the fiber balls are dried in an oven is 55 ℃; because the beta-CD solution and the silane coupling agent solution both contain water, the modified fiber ball surface also adsorbs water, and the water on the modified fiber ball surface can be removed by utilizing a drying mode in an oven.
The invention also provides an application of the modified fiber ball in absorbing Congo red, which comprises the following steps:
a1, preparing a Congo red solution with the concentration of 450mg/L for later use;
a2, adjusting the pH value of the Congo red solution by using NaOH with the concentration of 0.2mol/L and HCl with the concentration of 0.2mol/L to make the pH value of the Congo red solution be 6;
and A3, filling the modified fiber balls into a container, pouring the Congo red solution with the pH value of 5 in the step A2 into the container, taking the liquid in the container every two hours, and detecting the residual concentration of the Congo red in the sample.
The amount of the fiber balls put into the Congo red solution is 45 g/L.
The dissolved oxygen of the Congo red solution in the vessel in step A3 was 8 mg/L.
When the Congo red solution is treated by the modified fiber balls, cyclic aeration is used: when the Congo red solution in the container flows, the air pump works in the container, the air drives the Congo red solution to fully contact with the modified fiber balls, and the optimal removal rate of the concentration reaches more than 98%.
The working principle is as follows: in the invention, the polyester fiber balls are soaked by using the alkali solution, pollutants on the surfaces of the polyester fiber balls can be removed by using the alkali solution, the surfaces of the polyester fiber balls after being treated by the alkali solution are smoother, and then the polyester fiber balls are reacted with the beta-CD and the silane coupling agent to compound the beta-CD and the silane coupling agent with the polyester fiber balls, so that the electron supply capability of the polyester fiber balls containing the beta-CD and the silane coupling agent is enhanced, and the removal effect of the dye is improved. Meanwhile, hydrogen atoms of amino groups in dye molecules are combined with carbonyl groups on the surface of the fiber ball through hydrogen bonds, so that the adsorption treatment of the dye solution is promoted.
Example 2
The invention provides a technical scheme that: a preparation method of modified fiber balls comprises the following steps:
s1, putting an alkali solution with the concentration of 9% into a container, soaking the polyester fiber balls in the alkali solution in the container, and soaking the polyester fiber balls in the alkali solution for 3.8 hours at the temperature of 25 ℃; the polyester fiber balls are soaked by the alkaline solution, and pollutants such as grease and the like on the surfaces of the polyester fiber balls can be removed by the alkaline solution.
S2, taking the polyester fiber balls out of the alkali solution and washing the polyester fiber balls for three times by pure water; the surface of the polyester fiber ball treated by the alkali solution is stripped, and the pollutants can be thoroughly separated from the surface of the polyester fiber ball by using a mode of repeatedly cleaning with pure water, so that the surface of the polyester fiber ball treated by the alkali solution is smoother.
S3, mixing 9% beta-CD in 0.08% silane coupling agent to obtain solution A, mixing the cleaned fiber balls in the solution A, and reacting the fiber balls in the solution A for 2.8h at 38 ℃; and (3) compounding the beta-CD and the silane coupling agent on the surface of the polyester fiber ball at a proper temperature.
And S4, taking the fiber balls out of the solution A, and putting the fiber balls in an oven for drying to obtain the modified fiber balls. The temperature when the fiber balls are dried in an oven is 58 ℃; because the beta-CD solution and the silane coupling agent solution both contain water, the modified fiber ball surface also adsorbs water, and the water on the modified fiber ball surface can be removed by utilizing a drying mode in an oven.
The invention also provides an application of the modified fiber ball in absorbing Congo red, which comprises the following steps:
a1, preparing a Congo red solution with the concentration of 490mg/L for later use;
a2, adjusting the pH value of the Congo red solution by using NaOH with the concentration of 0.4mol/L and HCl with the concentration of 0.4mol/L to make the pH value of the Congo red solution be 7;
and A3, filling the modified fiber balls into a container, pouring the Congo red solution with the pH value of 6 in the step A2 into the container, taking the liquid in the container every two hours, and detecting the residual concentration of the Congo red in the sample.
The amount of the fiber balls put into the Congo red solution is 48 g/L.
The dissolved oxygen of the Congo red solution in the vessel in step A3 was 8.3 mg/L.
When the Congo red solution is treated by the modified fiber balls, cyclic aeration is used: when the Congo red solution in the container flows, the air pump works in the container, the air drives the Congo red solution to fully contact with the modified fiber balls, and the optimal removal rate of the concentration reaches more than 99%.
The working principle is as follows: in the invention, the polyester fiber balls are soaked by using the alkali solution, pollutants on the surfaces of the polyester fiber balls can be removed by using the alkali solution, the surfaces of the polyester fiber balls after being treated by the alkali solution are smoother, and then the polyester fiber balls are reacted with the beta-CD and the silane coupling agent to compound the beta-CD and the silane coupling agent with the polyester fiber balls, so that the electron supply capability of the polyester fiber balls containing the beta-CD and the silane coupling agent is enhanced, and the removal effect of the dye is improved. Meanwhile, hydrogen atoms of amino groups in dye molecules are combined with carbonyl groups on the surface of the fiber ball through hydrogen bonds, so that the adsorption treatment of the dye solution is promoted.
Example 3
The invention provides a technical scheme that: a preparation method of modified fiber balls comprises the following steps:
s1, putting 9% aqueous alkali into a container, soaking the polyester fiber balls in the aqueous alkali in the container, and soaking the polyester fiber balls in the aqueous alkali for 4.2 hours at the temperature of 35 ℃; the polyester fiber balls are soaked by the alkaline solution, and pollutants such as grease and the like on the surfaces of the polyester fiber balls can be removed by the alkaline solution.
S2, taking the polyester fiber balls out of the alkali solution and washing the polyester fiber balls for three times by pure water; the surface of the polyester fiber ball treated by the alkali solution is stripped, and the pollutants can be thoroughly separated from the surface of the polyester fiber ball by using a mode of repeatedly cleaning with pure water, so that the surface of the polyester fiber ball treated by the alkali solution is smoother.
S3, mixing 9% beta-CD in 0.12% silane coupling agent to obtain solution A, mixing the cleaned fiber balls in the solution A, and reacting the fiber balls in the solution A for 3.2h at 42 ℃; and (3) compounding the beta-CD and the silane coupling agent on the surface of the polyester fiber ball at a proper temperature.
And S4, taking the fiber balls out of the solution A, and putting the fiber balls in an oven for drying to obtain the modified fiber balls. The temperature when the fiber balls are dried in an oven is 62 ℃; because the beta-CD solution and the silane coupling agent solution both contain water, the modified fiber ball surface also adsorbs water, and the water on the modified fiber ball surface can be removed by utilizing a drying mode in an oven.
The invention also provides an application of the modified fiber ball in absorbing Congo red, which comprises the following steps:
a1, preparing a Congo red solution with the concentration of 520mg/L for later use;
a2, adjusting the pH value of the Congo red solution by using NaOH with the concentration of 0.6mol/L and HCl with the concentration of 0.6mol/L to make the pH value of the Congo red solution be 8;
and A3, filling the modified fiber balls into a container, pouring the Congo red solution with the pH value of 8 in the step A2 into the container, taking the liquid in the container every two hours, and detecting the residual concentration of the Congo red in the sample.
The amount of the fiber balls put into the Congo red solution is 52 g/L.
The dissolved oxygen of the Congo red solution in the vessel in step A3 was 8.8 mg/L.
When the Congo red solution is treated by the modified fiber balls, cyclic aeration is used: when the Congo red solution in the container flows, the air pump works in the container, the air drives the Congo red solution to fully contact with the modified fiber balls, and the optimal removal rate of the concentration reaches more than 98%.
The working principle is as follows: in the invention, the polyester fiber balls are soaked by using the alkali solution, pollutants on the surfaces of the polyester fiber balls can be removed by using the alkali solution, the surfaces of the polyester fiber balls after being treated by the alkali solution are smoother, and then the polyester fiber balls are reacted with the beta-CD and the silane coupling agent to compound the beta-CD and the silane coupling agent with the polyester fiber balls, so that the electron supply capability of the polyester fiber balls containing the beta-CD and the silane coupling agent is enhanced, and the removal effect of the dye is improved. Meanwhile, hydrogen atoms of amino groups in dye molecules are combined with carbonyl groups on the surface of the fiber ball through hydrogen bonds, so that the adsorption treatment of the dye solution is promoted.
Example 4
The invention provides a technical scheme that: a preparation method of modified fiber balls comprises the following steps:
s1, putting an alkali solution with the concentration of 11% into a container, soaking the polyester fiber balls in the alkali solution in the container, and soaking the polyester fiber balls in the alkali solution for 4.5 hours at the temperature of 40 ℃; the polyester fiber balls are soaked by the alkaline solution, and pollutants such as grease and the like on the surfaces of the polyester fiber balls can be removed by the alkaline solution.
S2, taking the polyester fiber balls out of the alkali solution and washing the polyester fiber balls for three times by pure water; the surface of the polyester fiber ball treated by the alkali solution is stripped, and the pollutants can be thoroughly separated from the surface of the polyester fiber ball by using a mode of repeatedly cleaning with pure water, so that the surface of the polyester fiber ball treated by the alkali solution is smoother.
S3, mixing 11% of beta-CD in a 0.15% of silane coupling agent to prepare a solution A, mixing the cleaned fiber balls in the solution A, and reacting the fiber balls in the solution A for 3.5 hours at the temperature of 44 ℃; and (3) compounding the beta-CD and the silane coupling agent on the surface of the polyester fiber ball at a proper temperature.
And S4, taking the fiber balls out of the solution A, and putting the fiber balls in an oven for drying to obtain the modified fiber balls. The temperature when the fiber balls are dried in an oven is 65 ℃; because the beta-CD solution and the silane coupling agent solution both contain water, the modified fiber ball surface also adsorbs water, and the water on the modified fiber ball surface can be removed by utilizing a drying mode in an oven.
The invention also provides an application of the modified fiber ball in absorbing Congo red, which comprises the following steps:
a1, preparing a Congo red solution with the concentration of 550mg/L for later use;
a2, adjusting the pH value of the Congo red solution by using NaOH with the concentration of 0.8mol/L and HCl with the concentration of 0.8mol/L to make the pH value of the Congo red solution be 9;
and A3, filling the modified fiber balls into a container, pouring the Congo red solution with the pH value of 9 obtained in the step A2 into the container, taking the liquid in the container every two hours, and detecting the residual concentration of the Congo red in the sample.
The amount of the fiber balls put into the Congo red solution is 55 g/L.
The dissolved oxygen of the Congo red solution in the vessel in step A3 was 9 mg/L.
When the Congo red solution is treated by the modified fiber balls, cyclic aeration is used: when the Congo red solution in the container flows, the air pump works in the container, the air drives the Congo red solution to fully contact with the modified fiber balls, and the optimal removal rate of the concentration reaches 100%.
The working principle is as follows: in the invention, the polyester fiber balls are soaked by using the alkali solution, pollutants on the surfaces of the polyester fiber balls can be removed by using the alkali solution, the surfaces of the polyester fiber balls after being treated by the alkali solution are smoother, and then the polyester fiber balls are reacted with the beta-CD and the silane coupling agent to compound the beta-CD and the silane coupling agent with the polyester fiber balls, so that the electron supply capability of the polyester fiber balls containing the beta-CD and the silane coupling agent is enhanced, and the removal effect of the dye is improved. Meanwhile, hydrogen atoms of amino groups in dye molecules are combined with carbonyl groups on the surface of the fiber ball through hydrogen bonds, so that the adsorption treatment of the dye solution is promoted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The preparation method of the modified fiber ball is characterized by comprising the following steps:
s1, putting an alkali solution with the concentration of 8% -11% into a container, soaking the polyester fiber balls in the alkali solution in the container, and soaking the polyester fiber balls in the alkali solution for 3.5-4.5 hours at the temperature of 25-40 ℃;
s2, taking the polyester fiber balls out of the alkali solution and washing the polyester fiber balls for three times by pure water;
s3, mixing 8% -11% of beta-CD in 0.05% -0.15% of silane coupling agent to prepare a solution A, mixing the cleaned fiber balls in the solution A, and reacting the fiber balls in the solution A for 2.5-3.5h at the temperature of 35-44 ℃;
and S4, taking the fiber balls out of the solution A, and putting the fiber balls in an oven for drying to obtain the modified fiber balls.
2. The method for preparing the modified fiber ball according to claim 1, wherein the method comprises the following steps: in step S4, the temperature at which the fiber balls are dried in the oven is 55 to 65 ℃.
3. Use of modified fiber spheres according to claims 1-2 to absorb congo red, comprising the steps of:
a1, preparing a Congo red solution with the concentration of 450-;
a2, adjusting the pH value of the Congo red solution by using NaOH with the concentration of 0.2-0.8mol/L and HCl with the concentration of 0.2-0.8mol/L to ensure that the pH value of the Congo red solution is 5-9;
and A3, filling the modified fiber balls into a container, pouring the Congo red solution with the pH value of 5-9 obtained in the step A2 into the container, taking the liquid in the container every two hours, and detecting the residual concentration of the Congo red in the sample.
4. The application of the modified fiber ball obtained by the preparation method of the modified fiber ball according to claim 3 in absorbing Congo red is characterized in that: the amount of the fiber balls put into the Congo red solution is 45-55 g/L.
5. The application of the modified fiber ball obtained by the preparation method of the modified fiber ball according to claim 3 in absorbing Congo red is characterized in that: the dissolved oxygen of the Congo red solution in the container in the step A3 is 8-9 mg/L.
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Application publication date: 20211001 |