CN105413661A - Polyethyleneimine-chitosan adsorbent one-step synthesis method - Google Patents
Polyethyleneimine-chitosan adsorbent one-step synthesis method Download PDFInfo
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- CN105413661A CN105413661A CN201511008773.5A CN201511008773A CN105413661A CN 105413661 A CN105413661 A CN 105413661A CN 201511008773 A CN201511008773 A CN 201511008773A CN 105413661 A CN105413661 A CN 105413661A
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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
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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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
- B01J20/267—Cross-linked polymers
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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
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
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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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
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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
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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
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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Abstract
The invention relates to a polyethyleneimine-chitosan adsorbent one-step synthesis method. The method comprises the following steps: firstly, chitosan, polyethyleneimine and glacial acetic acid are prepared into an inner phase solution, and liquid paraffin and petroleum ether are prepared into an outer phase solution; secondly, the inner phase solution and the outer phase solution obtained the first step are injected into a focal flow-type micro-fluidic chip, a series of chitosan liquid drops are prepared; thirdly, when the chitosan liquid drops in the second step are generated stably, the chitosan liquid drops are introduced into a crosslinking solidification liquid, and chitosan microspheres are prepared; fourthly, the chitosan microspheres obtained in the third step are cleaned for many times in an ethanol solution, an acetone solution and deionized water in order; fifthly, the chitosan microspheres obtained in the fourth step are subjected to freeze-drying, and a polyethyleneimine-chitosan adsorbent is obtained.
Description
Technical field
The invention belongs to water-treatment technology field, relate to a kind of polymine-chitosan absorbent one-step synthesis.
Background technology
Derived energy chemical industrial wastewater is usually containing complex components such as heavy metal ion (as copper, cobalt, manganese), azo dyes (as methyl orange), strong acid and strong bases, existing method of wastewater treatment, as neutralisation, reducing process, sulfuration method etc., be faced with that single treatment amount is little, long processing period, treatment effect are not good enough, processing cost is high, there is the difficult problems such as secondary pollution.
Therefore, at present simple effectively to processing method, treatment cycle is short, disposal cost is low, more and more higher to the cry of the efficient method of wastewater treatment of environment non-secondary pollution.
Summary of the invention
For derived energy chemical industrial wastewater complicated component, single treatment amount is little, long processing period, treatment effect are not good enough, processing cost is high, there is the difficult problems such as secondary pollution, the invention provides a kind of polymine-chitosan absorbent one-step synthesis of novelty, the method has that preparation method is simple and reliable, absorption property is stable effectively, can process the features such as Various Complex component waste water system simultaneously, thus solves problems of the prior art.
The invention provides a kind of polymine-chitosan absorbent one-step synthesis, the method comprises the following steps:
I shitosan, polymine glacial acetic acid are configured to interior phase solution by (), atoleine and benzinum are configured to external solution;
(ii) decline the interior phase solution obtained in step (i) and external solution injection focused flow fluidic chip respectively, obtained a series of shitosan drop;
(iii) after the shitosan droplets stable in step (ii) generates, imported in crosslinking curing liquid, obtained chitosan microball;
(iv) chitosan microball that ethanolic solution, acetone soln and deionized water repeatedly obtain in cleaning step (iii) is used successively; And
V chitosan microball freeze-drying that () will obtain in step (iv), obtains polymine-chitosan absorbent.
In one preferred embodiment, in step (i), described interior phase solution comprises the shitosan being added with 1-3 weight portion, the aqueous solution of 30% polymine of 1-3 weight portion and the glacial acetic acid of 1-2 weight portion, and slowly stirs 5-6 hour under the water bath condition of 45-50 DEG C; Described external solution comprises atoleine and the benzinum mixed solution according to volume ratio 7:5-2:1, and is added with the class of department 80 of 1-2 weight portion.
Another preferred embodiment in, in step (ii), by by the velocity ratio of described interior phase solution and external solution control carry out obtained a series of shitosan drop for 1:5 to 1:20.
Another preferred embodiment in, in step (ii), use External infusion pumping system respectively the interior phase solution obtained in step (i) and external solution to be injected focused flow and to decline fluidic chip.
Another preferred embodiment in, in step (iii), described crosslinking curing liquid comprises the normal octane solution of the class of department 80 of glutaraldehyde containing 0.5-1 weight portion and 1-2 weight portion.
Another preferred embodiment in, in step (iii), being passed into by shitosan drop in crosslinking curing liquid and slowly to stir, control mixing speed is 450-650r/min, and the reaction time is 30-60min.
Another preferred embodiment in, in step (iv), the concentration of ethanolic solution is 30-40%, and the concentration of acetone soln is 25-35%, cleans chitosan microball 3-4 time successively.
Another preferred embodiment in, in step (v), described freeze temperature is-40 to-60 DEG C, and freeze-drying time controls at 10-12 hour.
Another preferred embodiment in, the volume ratio of described atoleine and benzinum is 7:5.
Another preferred embodiment in, the velocity ratio of described interior phase solution and external solution controls as 1:7.
Accompanying drawing explanation
Fig. 1 is the flow chart of the polymine-chitosan absorbent one-step synthesis according to an embodiment of the invention.
Fig. 2 is the polymine-chitosan absorbent pictorial diagram according to an embodiment of the invention.
Fig. 3 is the color contrast of the polymine-chitosan absorbent absorption variable concentrations methyl orange dye according to the embodiment of the present application 1.
Fig. 4 is the color contrast of adsorbing different pH value acidity and alkaline solution according to the polymine-chitosan absorbent of the embodiment of the present application 2.
Detailed description of the invention
term
Term shitosan (Chitosan) used herein, refers to the product of chitin deacetylase base.It is the unique natural alkaline glycosaminoglycan of nature, has good biocompatibility, biological degradability and afterproduct nontoxicity of degrading.Containing a large amount of hydroxyls and amino on its macromolecular chain, wherein amino can react with metal ion, forms metallo-chelate, thus adsorbing metal ions, also hydroxyl and amino can be utilized simultaneously to modify shitosan itself, and then strengthen it to metal biosorption performance.
Term focused flow used herein declines Flow Control, and the shear action between referring to by immiscible fluid prepares dispersant liquid drop, and as the microflow control technique of the products such as Template preparation particle, gel.Drop microflow control technique can be applicable to multiple crossing domain.In chemical analysis, each drop is an independently enclosure space, enhances the anti-interference of sample in drop, not easily causes cross pollution between sample, improves analysis efficiency with repeatable; In reaction, significantly promote size uniformity degree and the structure complexity of microreactor, expand microreactor preparation method; At Material Field, its can be particle, gel, micro-capsule preparation excellent template is provided, give the physical and chemical performance that it is good.
Present inventor finds after extensive and deep research, for in derived energy chemical industry, existing process for treating industrial waste water complex process, operating cost is high, can not meet and process heavy metal ion simultaneously, the requirement of the complex component such as Acidity of Aikalinity and organic dyestuff, using polymine and shitosan mixing after as matrix, ethylene glycol diglycidylether is as crosslinking agent, in micro-fluidic chip, one-step synthesis monodispersity is good, mechanical strength is high, the adsorbent that absorption property is strong, multicomponent industrial wastewater can be processed efficiently, and eliminate the loaded down with trivial details technique that traditional chitosan absorbent needs later stage surface modification, preparation process is simple and reliable, have broad application prospects.Based on above-mentioned discovery, the present invention is accomplished.
The invention provides a kind of polymine-chitosan absorbent one-step synthesis, comprise the following steps:
Step one: shitosan, polymine and glacial acetic acid are configured to interior phase solution according to a certain percentage, is configured to external solution by atoleine and benzinum according to certain volume ratio;
Step 2: by External infusion pumping system according to certain flow velocity respectively by obtaining in step one mutually and foreign minister pass into respectively in micro-fluidic chip, obtain shitosan drop;
Step 3: passed into by the shitosan drop obtained in step 2 in certain density crosslinking curing liquid, controls mixing speed and mixing time, obtained chitosan microball;
Step 4: utilize the chitosan microball several obtained in certain density ethanol, acetone and washed with de-ionized water step 3 successively; And
Step 5: by after the chitosan microball freeze drying that obtains in step 4, obtain polymine-chitosan absorbent.
In the present invention, be the shitosan of about 1-3 weight portion mutually in described in step one, the mixed solution of the glacial acetic acid of 30% polymine of about 1-3 weight portion and about 1-2 weight portion, and at about 45-50 DEG C, preferably slow stir about 5-6 hour under the water bath condition of about 50 DEG C; Described foreign minister is about 7:5-2:1 for atoleine and benzinum with volume ratio, preferably the mixed solution of about 7:5, and adds the class of department 80 of 1-2 weight portion of having an appointment.
In the present invention, the interior foreign minister's velocity ratio described in step 2 controls at about 1:5-1:20, preferably about 1:7.
In the present invention, the crosslinking curing liquid described in step 3 is the normal octane solution containing the glutaraldehyde of 0.5 – 1 weight portion of having an appointment and the class of department 80 of about 1 – 2 weight portion; Passed into by shitosan drop in this crosslinking curing liquid, and slowly stir, mixing speed is about 450-650r/min, is preferably about 600r/min, and mixing time is about 30-60min, is preferably about 1 hour.
In the present invention, ethanol solution concentration used in step 4 is about 30-40%, is preferably about 40%, and acetone soln concentration is about 25-35%, is preferably about 30%, cleans chitosan microball 3-4 time successively.
In the present invention, the freeze drying operating temperature described in step 5 about-40 to-60 DEG C, be preferably about-45 DEG C, freeze-drying time is about 10-12 hour.
Below referring to accompanying drawing.
Fig. 1 is the flow chart of the polymine-chitosan absorbent one-step synthesis according to an embodiment of the invention.As shown in Figure 1, utilize External infusion pumping system 5 respectively obtained continuous phase and decentralized photo to be injected focused flow and to decline fluidic chip 1, obtained a series of shitosan drop; The shitosan drop of gained is imported in crosslinking curing liquid 2, stirring in water bath, obtained chitosan microball; The chitosan microball of gained is cleaned, obtains polymine-chitosan microball 3; By the polymine of gained-chitosan microball freeze-drying, obtain polymine-chitosan absorbent 4.
Fig. 2 is the polymine-chitosan absorbent pictorial diagram according to an embodiment of the invention.
Fig. 3 is the color contrast of the polymine-chitosan absorbent absorption variable concentrations methyl orange dye according to the embodiment of the present application 1.As shown in Figure 3, left 1 methyl orange solution (0.1%) is become light yellow (left 2) after absorption from orange red before adsorbing, in 1 methyl orange solution (0.01%) become colourless (in 2) after absorption from orange-yellow before adsorbing, right 1 methyl orange solution (0.001%) is become colourless (right 2) after absorption from the yellow before adsorbing.
Fig. 4 is the color contrast of adsorbing different pH value acidity and alkaline solution according to the polymine-chitosan absorbent of the embodiment of the present application 2.As shown in Figure 4, above, a row is being added with the dilute hydrochloric acid solution of acid indicator (0.1% methyl orange) respectively and being added with the sodium hydroxide solution of basic indicator (0.5% phenolphthalein) before absorption; After the polymine utilizing the inventive method to prepare-chitosan absorbent process, color just obviously shoaled in the short time, prove that the polymine-chitosan absorbent utilizing the inventive method to prepare fast and effeciently can adsorb acidity and the alkaline solution of different pH value, as shown in a row below.
Major advantage of the present invention is:
The invention provides a kind of polymine-chitosan absorbent one-step synthesis, adopt polymine and shitosan complex matrix, eliminate the loaded down with trivial details technique that traditional chitosan absorbent needs later stage surface modification, and adopt ethylene glycol diglycidylether as crosslinking agent, by microflow control technique one-step synthesis polymine-chitosan absorbent, have that preparation method is simple and reliable, absorption property is stable effectively, can process the features such as Various Complex component waste water system simultaneously.Obtained polymine-chitosan absorbent has the advantages that monodispersity is good, mechanical strength is high, absorption property is strong, can process multicomponent industrial wastewater efficiently, has broad application prospects.
embodiment
The present invention is set forth further below in conjunction with specific embodiment.But, should be understood that these embodiments only do not form limitation of the scope of the invention for illustration of the present invention.The test method of unreceipted actual conditions in the following example, usually conveniently condition, or according to the condition that manufacturer advises.Except as otherwise noted, all percentage and number are by weight.
embodiment 1: utilize polymine-chitosan absorbent to adsorb the methyl orange dye of different initial concentration
The preparation of polymine-chitosan absorbent:
Step one: by 30% polymine of the shitosan of 2 weight portions, 3 weight portions and the glacial acetic acid of 2 weight portions, under the water bath condition of 50 DEG C, slowly stirring 6 is little of mixing, and obtains interior phase; In addition, by atoleine and benzinum by volume 7:5 mix, and add the class of department 80 (purchased from Chemical Reagent Co., Ltd., Sinopharm Group) of 2 weight portions wherein, fully obtain foreign minister after mixing;
Step 2: utilize External infusion pumping system respectively described interior phase and foreign minister to be passed into focused flow according to the velocity ratio of 1:7 and decline in fluidic chip, obtained shitosan drop;
Step 3: after the shitosan droplets stable obtained in step 2, be passed in the crosslinking curing liquid be made up of the normal octane of the class of department 80 of the glutaraldehyde of 1 weight portion and 2 weight portions, and slowly stir, mixing speed is 600r/min, and mixing time is 40 minutes;
Step 4: successively working concentration be the ethanolic solution of 40%, the chitosan microball that obtains in the acetone soln of 30% and deionized water rinsing step 33 times;
Step 5: by the chitosan microball that obtains in step 4 under-45 DEG C of conditions, freeze drying 10 hours, obtains polymine-chitosan absorbent.
The absorption of the methyl orange dye of different initial concentration:
Take polymine-chitosan absorbent that 0.01g obtains add to respectively 5mL containing in the straight shape rib collar vial of 0.1%, 0.01% and 0.001% methyl orange solution, and with vibration frequency 800min in test tube blender
-1after vibrating 5 hours with vibration amplitude 6mm, contrast polymine-chitosan absorbent to the change of different initial concentration methyl orange color, as shown in Figure 3.
Experimental result:
Experiment proves, the methyl orange dye of polymine-chitosan absorbent of the present invention to variable concentrations has good absorption property.
embodiment 2: utilize polymine-chitosan absorbent to adsorb different pH value acidity and alkaline solution
The preparation of polymine-chitosan absorbent:
Polymine-chitosan absorbent is obtained by method described in embodiment 1.
The absorption of different pH value acidity and alkaline solution:
Secure ph is respectively the dilute hydrochloric acid solution of 3,4,5, is transferred in the straight shape rib collar vial of 30mL, and adds the acid indicator (methyl orange solution of 0.1%) of 0.1mL wherein.
Secure ph is respectively the sodium hydroxide solution of 8,9,10, is transferred in the straight shape rib collar vial of 30mL, and adds the basic indicator (phenolphthalein solution of 0.5%) of 0.1mL wherein.
Take 0.01g polymine-chitosan absorbent to join respectively in the straight shape rib collar vial of different pH value acidity and alkaline solution, and with vibration frequency 800min in test tube blender
-15 hours are vibrated with vibration amplitude 8mm.
Extract the supernatant liquid 3mL of above-mentioned solution respectively, be transferred to straight shape rib collar vial.The color contrast of contrast polymine-chitosan absorbent and alkaline solution acid to different pH value, as shown in Figure 4.
Application pH test paper measures the acidity after absorption and alkaline solution, and pH value is all close to neutrality.
Again to acidity and the alkaline solution of the corresponding pH value of the interpolation in the solution after above-mentioned absorption, all there is indicator chromogenic reaction.
Experimental result:
Experiment proves, polymine-chitosan absorbent of the present invention has good absorption property to different pH value acidity and alkaline solution.
embodiment 3: utilize the copper ion in polymine-chitosan absorbent absorption copper-bath
The preparation of polymine-chitosan absorbent:
Polymine-chitosan absorbent is obtained by method described in embodiment 1.
The absorption of the copper ion in copper-bath:
Take 0.1g polymine-chitosan absorbent and add that 50mL initial pH value is 5, copper ion concentration is in the copper-bath of 100ppm to.And with vibration frequency 800min in test tube blender
-1with vibration amplitude 8mm continuous shaking.Every 10 minutes, get the copper-bath of 2mL, utilize full spectrum direct-reading plasma emission spectrometer to measure it.Finally record polymine-chitosan absorbent and reached adsorption equilibrium after 80 minutes, copper ion concentration is now 11.08ppm, and adsorption efficiency is 88.92%.
Experimental result:
Experiment proves, chitosan absorbent of the present invention has good absorption property to copper ion.
Above-mentioned listed embodiment is only preferred embodiment of the present invention, is not used for limiting practical range of the present invention.Namely all equivalences done according to the content of the present patent application the scope of the claims change and modify, and all should be technology category of the present invention.
The all documents mentioned in the present invention are quoted as a reference all in this application, are just quoted separately as a reference as each section of document.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after having read above-mentioned instruction content of the present invention.
Claims (10)
1. polymine-chitosan absorbent one-step synthesis, the method comprises the following steps:
I shitosan, polymine glacial acetic acid are configured to interior phase solution by (), atoleine and benzinum are configured to external solution;
(ii) decline the interior phase solution obtained in step (i) and external solution injection focused flow fluidic chip respectively, obtained a series of shitosan drop;
(iii) after the shitosan droplets stable in step (ii) generates, imported in crosslinking curing liquid, obtained chitosan microball;
(iv) chitosan microball that ethanolic solution, acetone soln and deionized water repeatedly obtain in cleaning step (iii) is used successively; And
V chitosan microball freeze-drying that () will obtain in step (iv), obtains polymine-chitosan absorbent.
2. the method for claim 1, it is characterized in that, in step (i), described interior phase solution comprises the shitosan being added with 1-3 weight portion, the aqueous solution of 30% polymine of 1-3 weight portion and the glacial acetic acid of 1-2 weight portion, and slowly 5-6 hour is stirred under the water bath condition of 45-50 DEG C; Described external solution comprises atoleine and the benzinum mixed solution according to volume ratio 7:5-2:1, and is added with the class of department 80 of 1-2 weight portion.
3. the method for claim 1, is characterized in that, in step (ii), by being controlled to carry out obtained a series of shitosan drop for 1:5 to 1:20 by the velocity ratio of described interior phase solution and external solution.
4. the method for claim 1, is characterized in that, in step (ii), uses External infusion pumping system respectively the interior phase solution obtained in step (i) and external solution to be injected focused flow and to decline fluidic chip.
5. the method for claim 1, is characterized in that, in step (iii), described crosslinking curing liquid comprises the normal octane solution of the class of department 80 of glutaraldehyde containing 0.5-1 weight portion and 1-2 weight portion.
6. the method for claim 1, is characterized in that, in step (iii), passed into by shitosan drop in crosslinking curing liquid and also slowly stir, control mixing speed is 450-650r/min, and the reaction time is 30-60min.
7. the method for claim 1, is characterized in that, in step (iv), the concentration of ethanolic solution is 30-40%, and the concentration of acetone soln is 25-35%, cleans chitosan microball 3-4 time successively.
8. the method for claim 1, is characterized in that, in step (v), described freeze temperature is-40 to-60 DEG C, and freeze-drying time controls at 10-12 hour.
9. method as claimed in claim 2, it is characterized in that, the volume ratio of described atoleine and benzinum is 7:5.
10. method as claimed in claim 3, is characterized in that, the velocity ratio of described interior phase solution and external solution controls as 1:7.
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| CN105413661B (en) | 2018-10-19 |
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