CN106378111A - Magnetic Fe3O4/PMMA nano composite adsorbent with core-shell structure and preparation method thereof - Google Patents
Magnetic Fe3O4/PMMA nano composite adsorbent with core-shell structure and preparation method thereof Download PDFInfo
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- CN106378111A CN106378111A CN201610977891.5A CN201610977891A CN106378111A CN 106378111 A CN106378111 A CN 106378111A CN 201610977891 A CN201610977891 A CN 201610977891A CN 106378111 A CN106378111 A CN 106378111A
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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
- B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
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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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—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 physical properties
- B01J20/28009—Magnetic properties
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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
- B01J20/28—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
- B01J20/28021—Hollow particles, e.g. hollow spheres, microspheres or cenospheres
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- 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
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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- 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
Abstract
The invention belongs to the technical field of water treatment and particularly relates to a magnetic Fe3O4/PMMA nano composite adsorbent with a core-shell structure and a preparation method thereof. The preparation method of the magnetic Fe3O4/PMMA nano composite adsorbent comprises the following steps: preparing Fe3O4 magnetic powder with a hollow structure by using a method of controlling chemical oxidation polymerization by using a ferric salt solution, coating PMMA (Polymethyl Methacrylate) on the Fe3O4 magnetic powder to obtain the magnetic Fe3O4/PMMA nano composite adsorbent with the core-shell structure. Through the preparation method, the magnetic Fe3O4/PMMA nano composite adsorbent with the core-shell structure is prepared by an ultrasound-assisted chemical oxidation polymerization method without pollution to the environment in the absence of surfactants, cross-linking agents or organic stabilizers. The novel adsorbent is capable of rapidly removing heavy metals in wastewater; the adsorbent can achieve regenerative adsorption; the adsorption of the adsorbent which is continuously and repeatedly desorbed still has high adsorption efficiency; the adsorbent has a high industrial application value.
Description
Technical field
The invention belongs to water-treatment technology field, specifically, it is related to a kind of magnetic Fe with nucleocapsid structure3O4/PMMA
Nano-compound adsorbent and preparation method thereof.
Background technology
Heavy metal pollution in sewage has caused increasing concern.Wherein, heavy metal due to its high toxicity and
Mobility, has very detrimental effect to environment and human health.In waste water, heavy metal generally can adopt following several places
Reason method：Electrochemical reducing, the sedimentation method, hyperfiltration, ion exchange and absorption method.Titanium dioxide nanoparticle, green
The Fe of synthesis3O4The adsorbents such as nanoparticle have been used to process and the disposal of heavy metal in waste water cadmium.However, separating and reclaiming
These materials are challenges, particularly when particle diameter drops to nanoscale.Due to adsorbing low cost, can effectively remove low concentration and give up
Heavy metal in water so, be a kind of favourable and feasible method using absorption method.Compared with common adsorbents, magnetic absorption
Agent has physics and chemical stability is good, high mechanical strength and the good characteristic of wearability.Ferrum and iron oxides nano material by
Material as reduction or Adsorption of Heavy Metals.However, on the one hand in an acidic solution, pure nanoparticle is easy to aoxidize.Another
In a continuous-flow system, these nanoparticles are difficult to reclaim aspect.Therefore, in order to protect magnetic nano-particle from oxygen
Change, selected the structure of core-shell type.
Due to Fe3O4There is the double low attribute of toxicity and cost, it has been widely used in the preparation process of magnetic material
In and have been realized in business-like production.From 2010, China had become as second largest electron wastes in the world
Producer, and the PMMA ingredient that to be one of electron wastes important, discard amount also very big every year.
Content of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of magnetic with nucleocapsid structure
Fe3O4/ PMMA nano-compound adsorbent and preparation method thereof.This preparation method is simple, and the adsorbent obtaining can quickly remove
Heavy metal in waste water, and can be with regenerative adsorption, the absorption of this kind of adsorbent after continuous several times desorbing still has very high absorption
Efficiency, has larger industrial utility value.
The magnetic Fe with nucleocapsid structure proposed by the present invention3O4/ PMMA nano-compound adsorbent, be a kind of with magnetic no
The Fe of machine3O4For core, using the method for ultrasound assisted chemical oxidation polymerization, in one layer of PMMA of magnetic nano particle daughter nucleus outer wrapping
The magnetic Nano compound adsorbent constituting.Work as Fe3O4When Magnaglo is under weakly acidic condition, due to a large amount of hydroxyl of surface of inorganic particles
The weak electrostatic effect of base, Fe3O4Substantial amounts of H can be adsorbed in surface+, the Fe of protonation3O4It is placed in ethanol solution, and add PMMA
Afterwards, because nitrogen-atoms easily combine proton, PMMA is made to be adsorbed on the magnetic core on surface.After adding Ammonium persulfate., carry out interval super
Sound, can assist to improve the dispersibility of sample.Finally, polymer is gradually deposited at magnetic core Fe3O4Surface, forms nucleocapsid structure.One
Denier monomer is polymerized on the surface of the samples, and polymerization will continue to react, and so that polymer chain is increased.Obtained by present invention synthesis
Magnetic Nano compound adsorbent has more preferable monodispersity, and the thickness of cladding is uniform.The thickness of shell can be by controlling
Response time controls.
Technical scheme is specifically described as follows.
The present invention provides a kind of magnetic Fe with nucleocapsid structure3O4/ PMMA nano-compound adsorbent, it is in nucleocapsid structure,
The Fe of hollow structure3O4For core, PMMA layer is cladding shell.Preferably, the Fe of hollow structure3O4Particle diameter be 50-300 nanometer,
The thickness of PMMA layer is 15 ~ 25nm.
The present invention also provides a kind of above-mentioned magnetic Fe with nucleocapsid structure3O4The preparation side of/PMMA nano-compound adsorbent
Method, comprises the following steps that：Prepare the Fe of hollow structure first3O4Magnaglo；Then by Fe3O4Magnaglo is dispersed in diluted acid
In, and disperseed with EtOH Sonicate；Be eventually adding PMMA and Ammonium persulfate. hybrid reaction, reaction terminate after again Magnet separate, washing,
It is dried, obtain magnetic Fe3O4/ PMMA nano-compound adsorbent；Wherein：Fe3O4The mass ratio of Magnaglo and PMMA is 1:1-
10:1.Preferably, the Fe of hollow structure3O4Magnaglo is by ferric chloride hexahydrate and Sodium Acetate Trihydrate, Polyethylene Glycol at 190 ~ 210 DEG C
At a temperature of, reaction in ethanol prepares.
In the present invention, magnetic Fe3O4/ PMMA nano-compound adsorbent can be used for processing heavy metal cadmium；Magnetic after use
Fe3O4/ PMMA nano-compound adsorbent, can first pass through Magnet separation and obtain, then be placed in the sodium hydroxide solution of 0.5 ~ 1mol/L
Stirring, then wash drying, you can recycling.
Compared to the prior art, the beneficial effects of the present invention is：
（1）In the present invention, the PMMA sample that used can make to reclaim from electron wastes and obtain, can with the treatment of wastes with processes of wastes against one another,
Comprehensive utilization resource, the recovery to electronic waste and process also have certain meaning.
（2）In the present invention, the magnetic Fe of tool that provides3O4/ PMMA nano-compound adsorbent, different from the past is reported
Material, its preparation method is simple, environmental protection non-secondary pollution.And there is good dispersibility, magnetic response is high, microsphere shape
Homogeneous.The present invention takes full advantage of the characteristic of magnetic material, using Magnet separate, have raw material be easy to get, synthetic adsorbent purity
High it is easy to regenerative adsorption feature.
（3）In the present invention, prepared adsorbent is used for processing heavy metal cadmium, perspective good, and adsorption efficiency is high.It is applied to
The extensive waste water processing in industry and sanitary sewage.
Brief description
Fig. 1 is the magnetic Fe of embodiment 1 preparation3O4The SEM of/PMMA nano-compound adsorbent（Scanning electron microscope）Shape
Looks figure.
Fig. 2 is magnetic Fe3O4The TEM of/PMMA nano-compound adsorbent（Transmission electron microscope）Pattern illustrates.（a）Real
The magnetic Fe prepared when applying the PMMA that example 1 reclaims with electron wastes for monomer3O4/ PMMA nano-compound adsorbent；（b）Real
The magnetic Fe prepared when applying example 4 with pure PMMA for monomer3O4/ PMMA nano-compound adsorbent.
Fig. 3 is variable concentrations cadmium solution concentration magnetic Fe in embodiment 73O4The removal of/PMMA nano combined absorption cadmium
Efficiency.
Fig. 4 is magnetic Fe in embodiment 83O4The regenerative adsorption figure of/PMMA nano-compound adsorbent.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.
Embodiment 1
（1）Fe3O4The experimental program of the preparation of Magnaglo is as follows：1.622 grams of ferric chloride hexahydrates are taken to be dissolved in 100 milliliters
The solution being uniformly mixed in ethanol, and stir, it is subsequently adding 3.6 grams of Sodium Acetate Trihydrate and 1.0 grams of polyethylene glycol 6000s.Will
The yellow liquid obtaining is completely transferred in crucible, airtight preservation.At 200 DEG C, mixture is heated 48 hours.Magnet divides
From by distilled water and washing with alcohol, repeating this operation and be repeated 3 times.Finally, 40 DEG C of vacuum drying 6 of the material obtaining are little
When, repeatedly it is dried repeatedly, till obtaining completely crued sample.
（2）Magnetic Fe3O4Preparing of/PMMA nano-compound adsorbent is as follows：Fe by the 0.1g of above-mentioned preparation3O4Magnetic
Powder adds in 0.1 mole of every liter of hydrochloric acid.With nitrogen protection, mixture ultrasonic disperse 10 minutes is until magnetic powder distribution at room temperature
Uniformly.Standing, after 12 hours, adds 10 milliliters of ethanol ultrasonic disperse 10 minutes.Under nitrogen protection, add 0.1 gram from electronics
The PMMA reclaiming in garbage（Purity is 96 %, in addition to containing C, H, also contains N and S）Mix with Ammonium persulfate., be stirred continuously
Go forward side by side ultrasonic disperse of in the ranks having a rest（Ultrasonic 5 minutes every 10 minutes）.Magnet separates again, distilled water and washing with alcohol 3 times.Finally,
The material vacuum drying oven obtaining is dried 6 hours under the conditions of 40 DEG C, till obtaining completely crued sample, permissible
Repeatedly it is dried repeatedly.The Fe of gained hollow structure3O4The particle diameter of magnetic-particle is 300nm, and the thickness of PMMA shell is 20nm.
Fig. 1 is the magnetic Fe of embodiment 1 preparation3O4The SEM of/PMMA nano-compound adsorbent（Scanning electron microscope）Shape
Looks figure.
Embodiment 2
（1）Fe3O4The experimental program of the preparation of Magnaglo is as follows：3.244 grams of ferric chloride hexahydrates are taken to be dissolved in 100 milliliters
Ethanol in the solution that is uniformly mixed, and stir, be subsequently adding 7.2 grams of Sodium Acetate Trihydrate and 2.0 grams of Polyethylene Glycol
6000.The yellow liquid obtaining is completely transferred in crucible, airtight preservation.At 200 DEG C, mixture is heated 48 hours.
Magnet separates, and by distilled water and washing with alcohol, repeats this operation and is repeated 3 times.Finally, 40 DEG C of vacuum of the material obtaining are done
Dry 6 hours, repeatedly it is dried repeatedly, till obtaining completely crued sample.
（2）Magnetic Fe3O4Preparing of/PMMA nano-compound adsorbent is as follows：Fe by the 0.1g of above-mentioned preparation3O4Magnetic
Powder adds in 0.1 mole of every liter of hydrochloric acid.With nitrogen protection, mixture ultrasonic disperse 10 minutes is until magnetic powder distribution at room temperature
Uniformly.Standing, after 12 hours, adds 20 milliliters of ethanol ultrasonic disperse 20 minutes.Under nitrogen protection, add 0.1 gram from electronics
The PMMA reclaiming in garbage is mixed with Ammonium persulfate., is stirred continuously ultrasonic disperse of in the ranks having a rest of going forward side by side（Ultrasonic 5 points every 10 minutes
Clock）.Magnet separates again, distilled water and washing with alcohol 3 times.Finally, the material vacuum drying oven obtaining is dry under the conditions of 40 DEG C
Dry 6 hours, till obtaining completely crued sample, can repeatedly be dried repeatedly.
Wherein, the Fe of gained hollow structure3O4The particle diameter of magnetic-particle is 320nm, and the thickness of PMMA shell is 27nm.
Embodiment 3
（1）Fe3O4The experimental program of the preparation of Magnaglo is as follows：4.866 grams of ferric chloride hexahydrates are taken to be dissolved in 100 milliliters
The solution being uniformly mixed in ethanol, and stir, it is subsequently adding 10.8 grams of Sodium Acetate Trihydrate and 3.0 grams of polyethylene glycol 6000s.
The yellow liquid obtaining is completely transferred in crucible, airtight preservation.At 200 DEG C, mixture is heated 48 hours.Magnet
Separate, by distilled water and washing with alcohol, repeat this operation and be repeated 3 times.Finally, 40 DEG C of vacuum drying 6 of the material obtaining are little
When, repeatedly it is dried repeatedly, till obtaining completely crued sample.
（2）Magnetic Fe3O4Preparing of/PMMA nano-compound adsorbent is as follows：Fe by the 0.1g of above-mentioned preparation3O4Magnetic
Powder adds in 0.1 mole of every liter of hydrochloric acid.With nitrogen protection, mixture ultrasonic disperse 10 minutes is until magnetic powder distribution at room temperature
Uniformly.Standing, after 12 hours, adds 30 milliliters of ethanol ultrasonic disperse 30 minutes.Under nitrogen protection, add 0.1 gram from electronics
The PMMA reclaiming in garbage is mixed with Ammonium persulfate., is stirred continuously ultrasonic disperse of in the ranks having a rest of going forward side by side（Ultrasonic 5 points every 10 minutes
Clock）.Magnet separates again, distilled water and washing with alcohol 3 times.Finally, the material vacuum drying oven obtaining is dry under the conditions of 40 DEG C
Dry 6 hours, till obtaining completely crued sample, can repeatedly be dried repeatedly.
Wherein, the Fe of gained hollow structure3O4The particle diameter of magnetic-particle is 330nm, and the thickness of PMMA shell is 34nm.
Embodiment 4
（1）Fe3O4The experimental program of the preparation of Magnaglo is as follows：1.622 grams of ferric chloride hexahydrates are taken to be dissolved in 100 milliliters
The solution being uniformly mixed in ethanol, and stir, it is subsequently adding 7.2 grams of Sodium Acetate Trihydrate and 2.0 grams of polyethylene glycol 6000s.
The yellow liquid obtaining is completely transferred in crucible, airtight preservation.At 200 DEG C, mixture is heated 48 hours.Magnet
Separate, by distilled water and washing with alcohol, repeat this operation and be repeated 3 times.Finally, 40 DEG C of vacuum drying 6 of the material obtaining are little
When, repeatedly it is dried repeatedly, till obtaining completely crued sample.
（2）Magnetic Fe3O4Preparing of/PMMA nano-compound adsorbent is as follows：Fe by the 0.1g of above-mentioned preparation3O4Magnetic
Powder adds in 0.1 mole of every liter of hydrochloric acid.With nitrogen protection, mixture ultrasonic disperse 10 minutes is until magnetic powder distribution at room temperature
Uniformly.Standing, after 12 hours, adds 10 milliliters of ethanol ultrasonic disperse 10 minutes.Under nitrogen protection, add 0.1 gram pure
PMMA is mixed with Ammonium persulfate., is stirred continuously ultrasonic disperse of in the ranks having a rest of going forward side by side（Ultrasonic 5 minutes every 10 minutes）.Magnet divides again
From, distilled water and washing with alcohol 3 times.Finally, the material vacuum drying oven obtaining is dried 6 hours under the conditions of 40 DEG C, until
Till obtaining completely crued sample, can repeatedly be dried repeatedly.
Wherein, the Fe of gained hollow structure3O4The particle diameter of magnetic-particle is 350nm, and the thickness of PMMA shell is 28nm.
Embodiment 5
（1）Fe3O4The experimental program of the preparation of Magnaglo is as follows：3.244 grams of ferric chloride hexahydrates are taken to be dissolved in 100 milliliters
Ethanol in the solution that is uniformly mixed, and stir, be subsequently adding 7.2 grams of Sodium Acetate Trihydrate and 2.0 grams of Polyethylene Glycol
6000.The yellow liquid obtaining is completely transferred in crucible, airtight preservation.At 200 DEG C, mixture is heated 48 hours.
Magnet separates, and by distilled water and washing with alcohol, repeats this operation and is repeated 3 times.Finally, 40 DEG C of vacuum of the material obtaining are done
Dry 6 hours, repeatedly it is dried repeatedly, till obtaining completely crued sample.
（2）Magnetic Fe3O4Preparing of/PMMA nano-compound adsorbent is as follows：Fe by the 1g of above-mentioned preparation3O4Magnetic powder
End adds in 0.1 mole of every liter of hydrochloric acid.With nitrogen protection, at room temperature mixture ultrasonic disperse 10 minutes until magnetic powder distribution all
Even.Standing, after 12 hours, adds 20 milliliters of ethanol ultrasonic disperse 20 minutes.Under nitrogen protection, add 0.1 gram of pure PMMA
Mix with Ammonium persulfate., be stirred continuously ultrasonic disperse of in the ranks having a rest of going forward side by side（Ultrasonic 5 minutes every 10 minutes）.Magnet separates again, steams
Distilled water and washing with alcohol 3 times.Finally, the material vacuum drying oven obtaining is dried 6 hours under the conditions of 40 DEG C, until obtaining
Till completely crued sample, can repeatedly be dried repeatedly.
Wherein, the Fe of gained hollow structure3O4The particle diameter of magnetic-particle is 360nm, and the thickness of PMMA shell is 35nm.
Embodiment 6
（1）Fe3O4The experimental program of the preparation of Magnaglo is as follows：4.844 grams of ferric chloride hexahydrates are taken to be dissolved in 100 milliliters
The solution being uniformly mixed in ethanol, and stir, it is subsequently adding 7.2 grams of Sodium Acetate Trihydrate and 2.0 grams of polyethylene glycol 6000s.
The yellow liquid obtaining is completely transferred in crucible, airtight preservation.At 200 DEG C, mixture is heated 48 hours.Magnet
Separate, by distilled water and washing with alcohol, repeat this operation and be repeated 3 times.Finally, 40 DEG C of vacuum drying 6 of the material obtaining are little
When, repeatedly it is dried repeatedly, till obtaining completely crued sample.
（2）Magnetic Fe3O4Preparing of/PMMA nano-compound adsorbent is as follows：Fe by the 0.5g of above-mentioned preparation3O4Magnetic
Powder adds in 0.1 mole of every liter of hydrochloric acid.With nitrogen protection, mixture ultrasonic disperse 10 minutes is until magnetic powder distribution at room temperature
Uniformly.Standing, after 12 hours, adds 30 milliliters of ethanol ultrasonic disperse 30 minutes.Under nitrogen protection, add 0.1 gram pure
PMMA is mixed with Ammonium persulfate., is stirred continuously ultrasonic disperse of in the ranks having a rest of going forward side by side（Ultrasonic 5 minutes every 10 minutes）.Magnet divides again
From, distilled water and washing with alcohol 3 times.Finally, the material vacuum drying oven obtaining is dried 6 hours under the conditions of 40 DEG C, until
Till obtaining completely crued sample, can repeatedly be dried repeatedly.
Wherein, the Fe of gained hollow structure3O4The particle diameter of magnetic-particle is 375nm, and the thickness of PMMA shell is 40nm.
Embodiment 7
Compound concentration is 0.2 ~ 1.2 g/l of cadmium chloride solution respectively, each magnetic added in embodiment 1 in every part of solution
Fe3O40.1 gram of/PMMA nano-compound adsorbent.Adjusting pH value with 12 moles every liter of hydrochloric acid is 1.5, after ultrasonic disperse, Mei Geyi
The section time makes its solid-liquid separation under extraneous the action of a magnetic field, pipettes wherein 10 milliliters solution and takes 10 millis in 100 milliliters of volumetric flasks
Rise the solution after absorption, repeatedly after, average, calculate the content that cadmium is adsorbed, make adsorption curve figure, such as Fig. 3
Shown.Result shows, under the conditions of the present embodiment, magnetic Fe3O4The Caddy (Cleary) to the 0.2 ~ 0.8g/L for/PMMA nano-compound adsorbent
Solution adsorption efficiency is all more than 95%.
Embodiment 8
Embodiment 7 is adsorbed the magnetic Fe of cadmium3O4/ PMMA nano-compound adsorbent, is placed in 50 milliliters 0.5 mole at room temperature
In every liter of sodium hydroxide solution stir 0.5 hour, distilled water wash for several times after, be re-used for the absorption of metal ion, determine
Maximum adsorbance.After repeatedly, average, calculate the adsorption efficiency of cadmium, make adsorption curve figure, as shown in Figure 4.
Wherein, the absorption property of the 4th time is lower slightly, after first time desorbing to after the 5th desorbing adsorption efficiency all more than 90%, first
Adsorption efficiency after secondary desorbing is 95.5%, and the adsorption efficiency after the 5th parsing is 91.2%.
Claims (4)
1. a kind of magnetic Fe with nucleocapsid structure3O4/ PMMA nano-compound adsorbent is it is characterised in that it is in nucleocapsid knot
Structure, the Fe of hollow structure3O4For core, PMMA layer is cladding shell.
2. magnetic Fe as claimed in claim 13O4/ PMMA nano-compound adsorbent is it is characterised in that hollow structure
Fe3O4Particle diameter be 50-300 nanometer, the thickness of PMMA layer is 15 ~ 25nm.
3. a kind of magnetic Fe as claimed in claim 1 with nucleocapsid structure3O4The preparation side of/PMMA nano-compound adsorbent
Method is it is characterised in that comprise the following steps that：Prepare the Fe of hollow structure first3O4Magnaglo；Then by Fe3O4Magnaglo
It is dispersed in diluted acid, and disperseed with EtOH Sonicate；Be eventually adding PMMA and Ammonium persulfate. hybrid reaction, reaction terminate after Magnet again
Separate, wash, be dried, obtain magnetic Fe3O4/ PMMA nano-compound adsorbent；Wherein：Fe3O4Magnaglo and the quality of PMMA
Ratio is 1:1-10:1.
4. preparation method as claimed in claim 3 is it is characterised in that the Fe of hollow structure3O4Magnaglo is by six chloride hydrate
, at a temperature of 190 ~ 210 DEG C, reaction in ethanol prepares for ferrum and Sodium Acetate Trihydrate, Polyethylene Glycol.
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| CN107376871A (en) * | 2017-07-31 | 2017-11-24 | 淮海工学院 | A kind of high-efficiency adsorbent of heavy metal lead ion and preparation method and application |
| CN107376871B (en) * | 2017-07-31 | 2019-07-23 | 淮海工学院 | A kind of high-efficiency adsorbent and the preparation method and application thereof of heavy metal lead ion |
| CN110746743A (en) * | 2019-10-16 | 2020-02-04 | 武汉理工大学 | Lipophilic photon nanometer magnetic chain and preparation method thereof |
| CN114405487A (en) * | 2022-01-11 | 2022-04-29 | 浙江工业大学 | Core-shell type polyelectrolyte adsorbent and application thereof |
| CN114405487B (en) * | 2022-01-11 | 2023-09-29 | 浙江工业大学 | Core-shell polyelectrolyte adsorbent and application thereof |
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