CN108126671A - A kind of support type chitosan absorbent and its preparation method and application - Google Patents
A kind of support type chitosan absorbent and its preparation method and application Download PDFInfo
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- CN108126671A CN108126671A CN201711456775.XA CN201711456775A CN108126671A CN 108126671 A CN108126671 A CN 108126671A CN 201711456775 A CN201711456775 A CN 201711456775A CN 108126671 A CN108126671 A CN 108126671A
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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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—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 surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
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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
- B01J20/28054—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 surface properties or porosity
- B01J20/28069—Pore volume, e.g. total pore volume, mesopore volume, micropore volume
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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
- B01J20/28054—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 surface properties or porosity
- B01J20/28078—Pore diameter
- B01J20/28083—Pore diameter being in the range 2-50 nm, i.e. mesopores
-
- 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
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
Abstract
The invention discloses a kind of support type chitosan absorbents and its preparation method and application, specifically using chitosan as raw material, heat treatment modification is carried out to chitosan and obtains the nitrogenous carbon ball of nanometer, again using modification of chitosan as carrier loaded Chitosan powder, prepare support type chitosan nano adsorbent, compared with prior art, the loading chitosan adsorbing agent carrier and adsorbent of preparation are all from chitosan, material compatibility is good, it is of low cost, preparation process is simple, it is environmentally friendly, supported sorbents large specific surface area, with excellent absorption property, there is good application prospect in terms of waste water from dyestuff and heavy metal wastewater thereby absorption.
Description
Technical field
The invention belongs to environment and Application in Chemical Engineering technical field, more particularly to a kind of support type chitosan absorbent and its
Preparation method and application.
Background technology
The greatest problem that various organic-biologicals face on the earth at present is exactly to pollute, wherein, water pollution is considered as environment
One kind of most serious in pollution, the living space of serious threat to the mankind and various biologies.Wherein from plastics, ink,
The waste water of the industry such as semiconductor, dyestuff, leather processing and coating is because contained dyestuff and heavy metal component are complicated, toxicity is big, difficult drop
It is acknowledged as that environmental hazard is big, intractable industrial wastewater the features such as solution, is the key points and difficulties of water pollution control.Researcher
Photocatalytic degradation, biological treatment, membrane filter method, chemical oxygen are concentrated mainly on to the research of the processing method of industrial wastewater at present
Change method, electrolysis and absorption method etc..Wherein in numerous methods, absorption method is excellent with low cost, easily application, adsorbent easily regeneration etc.
Gesture is widely used in the processing of industrial wastewater.Therefore the selection of adsorbent just becomes the key factor for influencing adsorption effect.
Chitosan is because it is a kind of molecular structure from hydroxyl and amino group natural polysaecharides substance, through a large amount of science
Research be proved to be a kind of natural macromolecule adsorbent of function admirable, while have concurrently and derive from a wealth of sources, non-toxic degradable the features such as,
Gradually develop into a kind of potential excellent water treatment agent.But since chitosan has, specific surface is small, mechanical strength is low, in acid
Property solution in unstable, the defects of being not easily recycled it is caused to can not be applied on a large scale, this scientific research personnel is attempted to change it
Property is to improve its absorption property.
Common method of modifying has two kinds of physical modification and chemical modification, and such as supersound process, adds in modification at microwave treatment
Agent and crosslinking agent, pattern diversification, to means such as its surface graftings, these method of modifying are not satisfactory due to final modified effect
Or the theory of Green Chemistry is violated in modifying process, therefore many restrictions received in practical application.Chitosan is born
It is also a kind of method being modified to it to be loaded on inorganic carrier, can borrow the excellent of inorganic carrier (such as silica, aluminium oxide)
Point improves the specific surface area and stability of adsorbent, but preparation process is complicated mostly, and chemical reagent is added in preparation process
Deng so that the financial cost of final adsorbent increases.
Invention content
In order to solve the deficiencies in the prior art, the main object of the present invention is to provide that a kind of absorption property is excellent, specific surface area
Greatly, easily recycling, of low cost, environment amenable support type chitosan absorbent and its preparation method and application.
The preparation method of a kind of support type chitosan absorbent that first purpose of the present invention is to provide, including walking as follows
Suddenly：
(1) a certain amount of chitosan is weighed, heat treatment modification is carried out under inert atmosphere, calcination temperature is 420~1300
DEG C, the flow velocity of inert atmosphere is 20~100mLmin-1, roasting time is 0.5~12h, obtains heat treatment carrier；
(2) according to 1~50g of solid-to-liquid ratio：The ratio of 1L weighs chitosan and diluted acid respectively, and the chitosan weighed is abundant
It is dissolved in diluted acid, obtains the dilute acid soln of chitosan；
(3) the heat treatment support dispersion for obtaining step (1) obtains the suspension of heat treatment carrier in water；
(4) dilute acid soln of chitosan that step (2) obtains is added drop-wise under stirring at the heat that step (3) obtains
In the suspension for managing carrier, it is sufficiently stirred, be obtained by the reaction the suspension of supported sorbents, by the suspension of supported sorbents
Separation of solid and liquid, drying are to get target product support type chitosan absorbent successively.
Preferably, in step (1), inert atmosphere is nitrogen or argon gas.
Preferably, in step (2), any one of the diluted acid in hydrochloric acid, acetic acid, formic acid, oxalic acid and citric acid,
Mass fraction is 0.1~20%.
It is highly preferred that in step (2), chitosan is made to be completely dissolved in diluted acid by agitating mode, diluted acid temperature is 20
~100 DEG C, mixing time is 0.5~12h.
It is highly preferred that in step (3), the temperature of water is 20~100 DEG C, and the reaction time is 0.5~12h.
It is highly preferred that in step (4), the amount of chitosan is with being heat-treated in the suspension of carrier in the dilute acid soln of chitosan
The mass ratio for being heat-treated carrier is 0.05~0.5：1.
It is highly preferred that in step (4), reaction temperature is 20~100 DEG C, and the reaction time is 0.5~96h.
It is highly preferred that in step (4), solid-liquid separation method is filtered using conventional filtration, decompression, natural subsidence or centrifugation are divided
One kind from, drying temperature are 60~150 DEG C.
Second object of the present invention is to provide the support type chitosan absorbent that any of the above-described method is prepared.
Third object of the present invention is to provide above-mentioned support type chitosan absorbent in waste water from dyestuff or heavy metal wastewater thereby
Purposes in processing.
Compared with prior art, the beneficial effects of the present invention are：
(1) present invention carries out chitosan heat treatment modification and obtains the nitrogenous carbon ball of nanometer, then to change using chitosan as raw material
Property chitosan be carrier loaded Chitosan powder, prepare support type chitosan nano adsorbent, compared with prior art, preparation
Loading chitosan adsorbing agent carrier and adsorbent are all from chitosan, and material compatibility is good, of low cost, preparation process is simple,
It is environmentally friendly, supported sorbents large specific surface area (300~1500m2/g)；
(2) support type chitosan absorbent provided by the invention combine functional group that chitosan molecule structure carries and by
The characteristics of big specific surface of carrier prepared by chitosan, there is excellent absorption property, stability is good, easy recycling, gives up in dyestuff
There is certain industrial applicability, available for methyl blue, methyl orange, brilliant blue, disperse red, the Sudan in terms of water and heavy metal wastewater thereby absorption
Organic matter adsorbs and containing Pb in the waste water from dyestuff such as red, Congo red2+、Cr6+、Cu2+、Zn2+、Cd+、Hg+、Ba2+、Co2+、Ni+Deng a huge sum of money
Belong to the selective absorption of the heavy metal ion in waste water.
Specific embodiment
In order to which those skilled in the art is enable to more fully understand, technical scheme of the present invention is practiced, with reference to specific
The invention will be further described for embodiment, but illustrated embodiment is not as a limitation of the invention.
Unless otherwise defined, the hereinafter all technical terms used for being and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection domain.Unless otherwise specified, it the various raw materials used in the following embodiment of the present invention, reagent, instrument and sets
It is standby to be commercially available by market or be prepared by existing method.
Embodiment 1
A kind of support type chitosan absorbent of the present embodiment, specific preparation process are as follows：It weighs 15g chitosans and is placed in 420
DEG C Muffle furnace in carry out heat treatment modification, in 40mLmin-1Nitrogen stream in roast 4h, obtain the carbon of heat treatment carrier-nitrogenous
Balloon borne body；The chitosan for weighing 1.0g again is dissolved in 1% dilute hydrochloric acid of 30mL, at 40 DEG C stir 3h obtain chitosan diluted acid it is molten
Liquid；Then, weighing 5g heat treatments carrier, which is dissolved in the deionized water of 100mL stirring 1.5h at 40 DEG C, must be heat-treated the suspension of carrier
Liquid, by the dilute acid soln fast drop of above-mentioned chitosan to heat treatment carrier suspension in, after being vigorously stirred 6h at 40 DEG C
It centrifuges, be dried in vacuo to obtain above-mentioned support type chitosan absorbent at 60 DEG C.
Embodiment 2
A kind of support type chitosan absorbent of the present embodiment, specific preparation process and embodiment 1 are identical, and difference only exists
In it is 550 DEG C to be heat-treated modified temperature.
Embodiment 3
A kind of support type chitosan absorbent of the present embodiment, specific preparation process and embodiment 1 are identical, and difference only exists
In it is 750 DEG C to be heat-treated modified temperature.
Embodiment 4
A kind of support type chitosan absorbent of the present embodiment, specific preparation process and embodiment 1 are identical, and difference only exists
In it is 850 DEG C to be heat-treated modified temperature.
Embodiment 5
A kind of support type chitosan absorbent of the present embodiment, specific preparation process and embodiment 1 are identical, and difference only exists
In it is 1100 DEG C to be heat-treated modified temperature.
Embodiment 6
A kind of support type chitosan absorbent of the present embodiment, specific preparation process and embodiment 1 are identical, and difference only exists
In it is 1300 DEG C to be heat-treated modified temperature.
Embodiment 7
A kind of support type chitosan absorbent of the present embodiment, specific preparation process are as follows：It weighs 15g chitosans and is placed in 1300
DEG C Muffle furnace in carry out heat treatment modification, in 80mLmin-1Nitrogen stream in roast 10h, obtain heat treatment carrier-nitrogenous
Carbon ball carrier；
The chitosan for weighing 0.25g again is dissolved in 10% acetic acid of 15mL, and the diluted acid that 8h obtains chitosan is stirred at 80 DEG C
Solution；Then, weighing 2g heat treatments carrier, which is dissolved in the deionized water of 50mL stirring 0.5h at 80 DEG C, must be heat-treated the outstanding of carrier
By in the suspension of the dilute acid soln fast drop of above-mentioned chitosan to heat treatment carrier, 6h is vigorously stirred at 80 DEG C for supernatant liquid
It filters afterwards, wash, be dried in vacuo to obtain above-mentioned support type chitosan absorbent at 100 DEG C.
Embodiment 8
A kind of support type chitosan absorbent of the present embodiment, specific preparation process are as follows：It weighs 15g chitosans and is placed in 900
DEG C Muffle furnace in carry out heat treatment modification, in 100mLmin-1Nitrogen stream in roast 5h, obtain heat treatment carrier-nitrogenous
Carbon ball carrier；
The chitosan for weighing 0.5g again is dissolved in 1% dilute hydrochloric acid of 20mL, and the diluted acid that 12h obtains chitosan is stirred at 40 DEG C
Solution；Then, weighing 1.5g heat treatments carrier, which is dissolved in the deionized water of 50mL stirring 0.5h at 40 DEG C, must be heat-treated carrier
Suspension by the suspension of the dilute acid soln fast drop of above-mentioned chitosan to heat treatment carrier, is vigorously stirred at 40 DEG C
Sedimentation separation after for 24 hours is dried in vacuo to obtain above-mentioned support type chitosan absorbent at 100 DEG C.
Embodiment 9
A kind of support type chitosan absorbent of the present embodiment, specific preparation process are as follows：It weighs 15g chitosans and is placed in 550
DEG C Muffle furnace in carry out heat treatment modification, in 60mLmin-1Nitrogen stream in roast 4h, obtain the carbon of heat treatment carrier-nitrogenous
Balloon borne body；
The chitosan for weighing 1.0g again is dissolved in 5% oxalic acid of 30mL, at 40 DEG C stir 8h obtain chitosan diluted acid it is molten
Liquid；Then, weighing 5g heat treatments carrier, which is dissolved in the deionized water of 100mL stirring 2h at 40 DEG C, must be heat-treated the suspension of carrier
Liquid, by the dilute acid soln fast drop of above-mentioned chitosan to heat treatment carrier suspension in, after being vigorously stirred 96h at 40 DEG C
It centrifuges, be dried in vacuo to obtain above-mentioned support type chitosan absorbent at 150 DEG C.
Embodiment 10
A kind of support type chitosan absorbent of the present embodiment, specific preparation process are as follows：It weighs 15g chitosans and is placed in 750
DEG C Muffle furnace in carry out heat treatment modification, in 60mLmin-1Nitrogen stream in roast 6h, obtain the carbon of heat treatment carrier-nitrogenous
Balloon borne body；
The chitosan for weighing 1.0g again is dissolved in 2% acetic acid of 30mL, at 40 DEG C stir 12h obtain chitosan diluted acid it is molten
Liquid；Then, weighing 3g heat treatments carrier, which is dissolved in the deionized water of 100mL stirring 1.0h at 40 DEG C, must be heat-treated the suspension of carrier
Liquid, by the dilute acid soln fast drop of above-mentioned chitosan to heat treatment carrier suspension in, after being vigorously stirred 48h at 40 DEG C
It centrifuges, be dried in vacuo to obtain above-mentioned support type chitosan absorbent at 100 DEG C.
Embodiment 11
A kind of support type chitosan absorbent of the present embodiment, specific preparation process are as follows：It weighs 15g chitosans and is placed in 800
DEG C Muffle furnace in carry out heat treatment modification, in 40mLmin-1Nitrogen stream in roast 0.5h, obtain heat treatment carrier-nitrogenous
Carbon ball carrier；
The chitosan for weighing 1.0g again is dissolved in 1% formic acid of 30mL, at 40 DEG C stir 1h obtain chitosan diluted acid it is molten
Liquid；Then, weighing 2g heat treatments carrier, which is dissolved in the deionized water of 100mL stirring 0.5h at 40 DEG C, must be heat-treated the suspension of carrier
Liquid, by the dilute acid soln fast drop of above-mentioned chitosan to heat treatment carrier suspension in, after being vigorously stirred 6h at 40 DEG C
Sedimentation separation is dried in vacuo to obtain above-mentioned support type chitosan absorbent at 60 DEG C.
Comparative example 1
A kind of support type chitosan absorbent of the present embodiment, specific preparation process and embodiment 1 are identical, and difference only exists
In it is 250 DEG C to be heat-treated modified temperature.
Comparative example 2
A kind of support type chitosan absorbent of the present embodiment, specific preparation process and embodiment 1 are identical, and difference only exists
In it is 400 DEG C to be heat-treated modified temperature.
Above-described embodiment 1-11 has prepared the good support type chitosan absorbent of absorption property, and the present invention is made below
Related performance indicators for the support type chitosan absorbent gone out are measured, and are specifically shown in Table 1.
1 support type chitosan absorbent performance indicator of table
The specific surface area of support type chitosan absorbent prepared as can be seen from Table 1 is far longer than unmodified chitosan
Specific surface area, and controllable range is very wide, wherein the modified condition of modified chitin carrier and the chitosan of load
The factors such as amount and its external condition are to influence the specific surface area and pore structure of final adsorbent.
Application example
The support type chitosan absorbent that the present invention prepares is applied to by the 1st, effect in order to further illustrate the present invention
In processing containing organic dye waste water, specific experiment process and experimental result are as follows.
The methylene blue solution of 100mg/L is prepared, takes 10mL, adjustment pH value is 3.5, adds in the negative of 8 preparation of 2mg embodiments
Load type chitosan absorbent, vibrates in constant temperature oscillator, 30 DEG C of vibration temperature, rotating speed 200r/min, after reaching adsorption equilibrium
It centrifuges, supernatant is taken to measure its light absorption value, it is 99.8% to calculate methylene blue removal rate, equilibrium adsorption capacities 499mg/
g。
The support type chitosan absorbent that the present invention prepares is applied to by the 2nd, effect in order to further illustrate the present invention
In processing containing effluent containing heavy metal ions, specific experiment process and experimental result are as follows.
Prepare the Cr for containing a concentration of 100mg/L respectively6+、Cu2+、Zn2+、Hg+Mixture-metal cationic solution
100mL simulates true industrial wastewater, adjusts between its pH value is 2~8, adds in support type chitosan prepared by embodiment 9 and inhale
It attached dose, is vibrated in constant temperature oscillator, 30 DEG C of vibration temperature, rotating speed 200r/min are centrifuged after reaching adsorption equilibrium, taken
Clear liquid measures its residual content.When pH value is 2.8, adsorbent is to Cr6+Removal rate be 89.7%, Cu2+、Zn2+、Hg+Go
Except rate is respectively 65%, 56% and 32%.
Likewise, we by taking the support type chitosan absorbent that embodiment 8 provides as an example, select and simulate other organic dyestuff
Waste water such as methyl orange, brilliant blue, disperse red, tonyred etc., achieve effect consistent with the above, removal rate 99% with
On.
To sum up, since support type chitosan absorbent provided in an embodiment of the present invention can be widely applied to waste water from dyestuff and again
In metallic wastewater processing procedure.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.Embodiment described above is only to absolutely prove the present invention
And the preferred embodiment lifted, protection domain are without being limited thereto.Those skilled in the art institute on the basis of the present invention
The equivalent substitute of work or transformation, within protection scope of the present invention, protection scope of the present invention is subject to claims.
Claims (10)
1. a kind of preparation method of support type chitosan absorbent, which is characterized in that include the following steps：
(1) a certain amount of chitosan is weighed, heat treatment modification is carried out under inert atmosphere, calcination temperature is 420~1300 DEG C, lazy
Property atmosphere flow velocity be 20~100mLmin-1, roasting time is 0.5~12h, obtains heat treatment carrier；
(2) according to 1~50g of solid-to-liquid ratio：The ratio of 1L weighs chitosan and diluted acid respectively, and the chitosan weighed is fully dissolved
In diluted acid, the dilute acid soln of chitosan is obtained；
(3) the heat treatment support dispersion for obtaining step (1) obtains the suspension of heat treatment carrier in water；
(4) dilute acid soln of chitosan that step (2) obtains is added drop-wise to the heat treatment that step (3) obtains under stirring to carry
It in the suspension of body, is sufficiently stirred, be obtained by the reaction the suspension of supported sorbents, by the suspension of supported sorbents successively
Separation of solid and liquid, drying are to get target product support type chitosan absorbent.
2. the preparation method of support type chitosan absorbent according to claim 1, which is characterized in that lazy in step (1)
Property atmosphere be nitrogen or argon gas.
3. the preparation method of support type chitosan absorbent according to claim 1, which is characterized in that in step (2), institute
Any one of diluted acid in hydrochloric acid, acetic acid, formic acid, oxalic acid and citric acid is stated, mass fraction is 0.1~20%.
4. the preparation method of support type chitosan absorbent according to claim 3, which is characterized in that in step (2), lead to
Crossing agitating mode makes chitosan be completely dissolved in diluted acid, and diluted acid temperature is 20~100 DEG C, and mixing time is 0.5~12h.
5. the preparation method of support type chitosan absorbent according to claim 1, which is characterized in that in step (3), water
Temperature for 20~100 DEG C, the reaction time is 0.5~12h.
6. the preparation method of support type chitosan absorbent according to claim 1, which is characterized in that in step (4), shell
In the dilute acid soln of glycan the amount of chitosan and the mass ratio of heat treatment carrier in the suspension of heat treatment carrier for 0.05~
0.5：1.
7. the preparation method of support type chitosan absorbent according to claim 6, which is characterized in that in step (4), instead
It is 20~100 DEG C to answer temperature, and the reaction time is 0.5~96h.
8. the preparation method of support type chitosan absorbent according to claim 7, which is characterized in that in step (4), Gu
Liquid separate mode is filtered using conventional filtration, decompression, one kind in natural subsidence or centrifugation, and drying temperature is 60~150
℃。
9. a kind of support type chitosan absorbent that any the method for claim 1~8 is prepared.
10. use of the support type chitosan absorbent according to claim 9 in waste water from dyestuff or heavy metal containing wastewater treatment
On the way.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113058565A (en) * | 2021-03-19 | 2021-07-02 | 兰州交通大学 | Method for preparing adsorbent with good adsorption performance by using carbon fiber and chitosan as raw materials |
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| CN103933951A (en) * | 2014-05-13 | 2014-07-23 | 农业部环境保护科研监测所 | Method for preparing chitosan-based adsorbent for adsorbing hexavalent chromium |
| CN105597691A (en) * | 2015-12-19 | 2016-05-25 | 中国海洋大学 | Preparation method and application of composite microspheres |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103933951A (en) * | 2014-05-13 | 2014-07-23 | 农业部环境保护科研监测所 | Method for preparing chitosan-based adsorbent for adsorbing hexavalent chromium |
| CN105597691A (en) * | 2015-12-19 | 2016-05-25 | 中国海洋大学 | Preparation method and application of composite microspheres |
Non-Patent Citations (1)
| Title |
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| YONGJUN GAO ET AL: "Chitin-Derived Mesoporous, Nitrogen-Containing Carbon for Heavy-Metal Removal and Styrene Epoxidation", 《CHEMPLUSCHEM》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113058565A (en) * | 2021-03-19 | 2021-07-02 | 兰州交通大学 | Method for preparing adsorbent with good adsorption performance by using carbon fiber and chitosan as raw materials |
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Application publication date: 20180608 |