CN109529767A - The preparation method and application method of the compound magnetic modification biological Carbon Materials of chitosan - Google Patents
The preparation method and application method of the compound magnetic modification biological Carbon Materials of chitosan Download PDFInfo
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Abstract
The present invention discloses a kind of preparation method and application method of compound magnetic modification biological Carbon Materials of chitosan.The following steps are included: preparation charcoal powder；Prepare Fe3O4Biological powdered carbon is added in above-mentioned colloidal mixture by colloidal mixture, and after heating stirring, vacuum filtration is separated, dried at 60 DEG C, obtains magnetic modification biological Carbon Materials；It takes Chitosan powder to be dissolved in acetum and forms mixed liquor；Above-mentioned magnetic modification biological Carbon Materials are added in mixed liquor and are stirred, mixing suspension is obtained after cooling；Above-mentioned mixing suspension is added in NaOH solution, and continues to be stirred, after vacuum filtration separation is sufficiently washed with deionized water, drying obtains the compound magnetic modification biological Carbon Materials of chitosan.The compound magnetic modification biological Carbon Materials of the chitosan that the present invention obtains, have the characteristics that large specific surface area, more than adsorption site and easily in conjunction with metal ion, adsorption efficiency it is high, environmental-friendly, and it has magnetism, can realize that a certain degree heavy metal is separated from contaminated soil.
Description
Technical field
The invention belongs to environment functional material and contaminated soil Treatment process field, specifically a kind of chitosan is compound
The preparation method and application of magnetic modification biological charcoal.
Background technique
In recent years, with the adjustment of Industry Structure and the quickening of urbanization process, large quantities of contaminating enterprises are successively moved
Or close, it is discarded to leave that place quantity sharply increases and pollution condition is complicated, become the limitation of Security of Land Resource recycling because
Element." national soil regime investigation bulletin " data are shown within 2014, and the national total exceeding standard rate of soil pollution has reached 16.1%, and weight is dirty
Dye enterprise's land used and brownfield soil pollution point exceeding standard rate respectively reach 36.3% and 34.9%, and with an inorganic huge sum of money
Belong to cadmium, lead, based on arsenic pollution.Heavy-metal contaminated soil not only will affect crops normal growth and agricultural product quality and safety, and
It can be absorbed and be enriched in crop body by crops, human health can be jeopardized eventually by food chain, such as enter the cadmium of human body,
Cadmium sulfoprotein is formed in vivo, whole body is reached by blood, and selectively accumulate in kidney, liver, is in turn resulted in bone and is dredged
Pine, atrophy, deformation etc., or even more serious body disease.
Currently, the recovery technique means for heavy-metal contaminated soil are enriched constantly, such as solidification and stabilization, elution, chemistry
Redox, biological prosthetic etc., gradually obtain extensive use.Although restorative procedure is numerous, the application of monotechnics is usually deposited
The problems such as long in repairing efficiency, quadratic risk function is serious, is not particularly suited for contaminated site and the reparation of large area arable soil.Meanwhile
With going deep into for research, obtained about application of the novel environmental functional material in polluted-water environment, tackling wide
General development, such as porosity is high, adsorption capacity is strong, the high characteristic of environmental stability because having for biological carbon materials, so that charcoal exists
There are huge potentiality in terms of the pollutants such as the heavy metal in absorption waste water, soil.But due to type of raw materials, preparation condition etc.
The biological carbon materials of factor, the preparation of biomass Direct Pyrolysis are relatively low in terms of heavy metal adsorption, and biomass raw material of wood-charcoal
The use of the modifications/activating means such as the surface oxidation of material and functionalization can effectively increase the absorption point on biomass carbon surface
Position, more especially with heavy metal ion adsorbed closely related surface functional group, to make its table in environment remediation field
It is existing excellent.Uchimiya etc. is carboxy-modified to the progress of cotton seed hulls biology carbon surface by oxidizing process, and comparative experimental research is modified
Charcoal is to Cu in soil2+、Zn2+、Pb2+The fixed effect of heavy metal is significantly improved.In addition, organic acid, oxide, receiving
The modified biological carbon materials such as rice material are also gradually applied to waste residue and liquid, soil and groundwater environmental repairing containing heavy metal.
Modification biological charcoal not only has stable absorption property, there are also good thermal stability, after being recycled for multiple times, still have compared with
High adsorption capacity.
Chitosan is a kind of by the deacetylated obtained natural polymer of chitin, hydroxyl rich in, carboxylic
Base and amino isoreactivity functional group have good degradability and Environmental compatibility, in chitosan molecule chain can with it is a variety of
Heavy metal ion occurs complexation reaction and forms complex, is combined to biological carbon surface, can significantly increase walnut shell
The adsorption capacity (CN 105236507) of the environmentally conscious materials such as charcoal.Convenient, low in cost, nothing is obtained since chitosan has
Poison does not generate the advantages that secondary pollution, is widely used in handling heavy metal wastewater thereby and contaminated soil；But since chitosan is in acid
It is easy to run off and recycles difficulty under property environment, chemical stability and mechanical strength are lower, limit it to a certain extent in environment
The application in pollution control field.Further, since magnetic material properties, by the modified biological carbon materials of magnetic, in its reduction adsorption
After heavy metal, heavy metal can be separated from pollution medium, by magnetic separation technique such as CN107199013, CN
105906133 equal patent documents have been applied to the purified treatment of heavy metal-polluted water.Therefore, by by chitosan and magnetic
Property modified method combine, composite modified modification is carried out to biological carbon materials, can not only increase its adsorption potential to heavy metal
Point, it is also possible to circulation of the realization heavy metal contaminants from thorough removal and modification biological Carbon Materials in soil environment to a certain degree
It utilizes.In existing report, this heavy-metal contaminated soil modified as substrate, chitosan and magnetic coupling using biomass carbon is inhaled
Attached dose does not have abundant report also.
Summary of the invention
To overcome drawbacks described above, the purpose of the present invention is to provide a kind of preparation methods of the composite modified charcoal of chitosan
And application method.
In order to achieve the above objectives, the preparation method of the compound magnetic modification biological Carbon Materials of chitosan of the present invention, including following step
It is rapid:
Prepare charcoal powder；
Prepare Fe3O4Colloidal mixture
Biological powdered carbon is added in above-mentioned colloidal mixture, after heating stirring, vacuum filtration is separated, is dried at 60 DEG C,
Obtain magnetic modification biological Carbon Materials；
It takes Chitosan powder to be dissolved in acetum and forms mixed liquor；Above-mentioned magnetic modification biological Carbon Materials are added to mixing
It is stirred in liquid, mixing suspension is obtained after cooling；
Above-mentioned mixing suspension is added in NaOH solution, and continues to be stirred, vacuum filtration separation and deionized water
Sufficiently after washing, drying obtains the compound magnetic modification biological Carbon Materials of chitosan.
Preferably, the step of described preparation charcoal powder specifically:
Biological material is taken, is put into be pyrolyzed in tube furnace after dry, crushing and fire, in anaerobism and 300~600 DEG C of conditions
Under, be pyrolyzed 4~8h, be prepared into the charcoal, then charcoal is ground up, sieved into it is powdered, it is spare；The anaerobism item
Part is by being passed through N into pipe with the flow velocity of 400mL/min2It realizes.
Preferably, the preparation Fe3O4The step of colloidal mixture specifically:
By FeCl3·6H2O and FeCl2·4H2Two kinds of soluble ferric iron salt material mixings of O are dissolved in HCl solution, are mixed
Close solution；After completely dissolution, under intense mechanical stirring condition, mixed solution described above is added in ammonia spirit, is obtained
Fe must be contained3O4Colloidal mixture；
Preferably, the FeCl3·6H2O and FeCl2·4H2The molar ratio of two kinds of soluble ferric iron salts of O is 2:1, used
The concentration of HCl solution is 0.2~0.5molL-1。
Preferably, the ammonia spirit concentration is 5%~10%, the volume ratio with mixed solution described in (2) is
1.5:1~3:1.
Preferably, the mixed proportion of the biological carbon materials and colloidal mixture is 40~75g/L.
Preferably, the acetum mass fraction be 0.8%~3%, the magnetic modification biological Carbon Materials with mix
The mass ratio of liquid is 60~100g/L.
Preferably, the NaOH solution mass fraction is 10%~15%, with mix the volume ratio of suspension for 1:1~
3:1, the drying condition are 55~60 DEG C.
In order to achieve the above objectives, the compound magnetic modification biological Carbon Materials of chitosan of the present invention are in heavy metal cadmium soil remediation
Application in field.
In order to achieve the above objectives, the compound magnetic modification biological Carbon Materials of chitosan of the present invention are repaired applied to heavy-metal contaminated soil
Multiple method includes the following steps: for above-mentioned modification biological Carbon Materials to be added in the soil by heavy metal pollution, then plus in advance
Quantitative deionized water is sufficiently mixed, and is carried out constant-temperature moisture-keeping to the soil of above-mentioned processing and is cultivated reaction, can be realized by heavy metal-polluted
The soil stabilization reparation of dye；The modification biological Carbon Materials addition weight ratio is every kilogram of soil 0.5%~3%；；It is described
The additive amount of deionized water is 60% level of field capacity；The time for cultivating reaction is 15~60 days.
Using above-mentioned technical solution, the beneficial effects of the present invention are
1. the compound magnetic modification biological Carbon Materials of the chitosan that the present invention obtains have large specific surface area, adsorption site
The characteristics of mostly and easily in conjunction with metal ion, adsorption efficiency are high, environmental-friendly, and it has magnetism, can realize weight to a certain degree
Metal is separated from contaminated soil, provides a kind of new approaches for the improvement of heavy-metal contaminated soil；
2. primordial matter material source of the present invention is abundant, at low cost, and it cracks preparation method and simple process,
It can effectively realize industrialized production；
3. modification biological Carbon Materials environmental stability of the present invention is high, using simple process, to weight in contaminated soil
The absorption stabilization effect of metal is preferable, and possible in the presence of recycling, is with a wide range of applications.
Detailed description of the invention
Fig. 1 is preparation and the applicating flow chart of modification biological Carbon Materials of the present invention
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below with reference to Figure of description and
Invention is further described in detail for specific embodiment.The person that is not specified actual conditions in embodiment, according to normal conditions or system
The condition for making quotient's suggestion carries out.
Embodiment 1
Present embodiments provide a kind of modified biological carbon materials of the compound magnetic of chitosan, be mainly prepared by the following steps and
At:
(1) wheat stalk material is taken, is put into be pyrolyzed in tube furnace after dry, crushing and fire, with 400mL/min's in pipe
Flow velocity is passed through N2Under the conditions of anaerobism and 300 DEG C, it is pyrolyzed 4~8h, the charcoal is prepared into, then by ground 60 mesh of charcoal
It sieves into powdered；
(2) by FeCl3·6H2O and FeCl2·4H2Two kinds of soluble ferric iron salt substances of O are 2:1, mixed dissolution with molar ratio
In 0.2molL-1In HCl solution, mixed solution is obtained；After completely dissolution, under intense mechanical stirring condition, by above-mentioned mixing
Solution is added in 9% ammonia spirit with volume ratio 1:1.5, is obtained and is contained Fe3O4Colloidal mixture；
(3) biological carbon materials are added in above-mentioned colloidal mixture with 40g/L ratio, and in 25 DEG C of thermostat water baths
After heating stirring, vacuum filtration is separated, is dried at 60 DEG C, obtains magnetic modification biological Carbon Materials；
(4) taking Chitosan powder to be dissolved in mass fraction is to form mixed liquor in 2.0% acetum, by the modified life of above-mentioned magnetic
Object Carbon Materials are added in mixed liquor with 65g/L mass ratio, and the heating stirring in 25 DEG C of water-baths, are mixed after cooling
Suspension；
(5) by above-mentioned mixing suspension with 1:1.2 volume ratio, being slowly added into mass fraction is in 10%NaOH solution, and
Continue to be stirred, after vacuum filtration separation is sufficiently washed with deionized water, 55 DEG C of drying obtain the modified life of the compound magnetic of chitosan
Object Carbon Materials.
Embodiment 2
Present embodiments provide a kind of modified biological carbon materials of the compound magnetic of chitosan, be mainly prepared by the following steps and
At:
(1) wheat stalk material is taken, is put into be pyrolyzed in tube furnace after dry, crushing and fire, with 400mL/min's in pipe
Flow velocity is passed through N2Under the conditions of anaerobism and 350 DEG C, it is pyrolyzed 4~8h, the charcoal is prepared into, then by ground 60 mesh of charcoal
It sieves into powdered；
(2) by FeCl3·6H2O and FeCl2·4H2Two kinds of soluble ferric iron salt substances of O are 2:1, mixed dissolution with molar ratio
In 0.35molL-1In HCl solution, mixed solution is obtained；It after completely dissolution, will be above-mentioned mixed under intense mechanical stirring condition
It closes solution to be added in 9% ammonia spirit with volume ratio 1:1.5, obtains and contain Fe3O4Colloidal mixture；
(3) biological carbon materials are added in above-mentioned colloidal mixture with 45g/L ratio, and in 25 DEG C of thermostat water baths
After heating stirring, vacuum filtration is separated, is dried at 60 DEG C, obtains magnetic modification biological Carbon Materials；
(4) taking Chitosan powder to be dissolved in mass fraction is to form mixed liquor in 1.0% acetum, by the modified life of above-mentioned magnetic
Object Carbon Materials are added in mixed liquor with 75g/L mass ratio, and the heating stirring in 25 DEG C of water-baths, are mixed after cooling
Suspension；
(5) by above-mentioned mixing suspension with 1:2.4 volume ratio, being slowly added into mass fraction is in 12%NaOH solution, and
Continue to be stirred, after vacuum filtration separation is sufficiently washed with deionized water, 60 DEG C of drying obtain the modified life of the compound magnetic of chitosan
Object Carbon Materials.
Embodiment 3
Present embodiments provide a kind of modified biological carbon materials of the compound magnetic of chitosan, be mainly prepared by the following steps and
At:
(1) corn stover material is taken, is put into be pyrolyzed in tube furnace after dry, crushing and fire, with 400mL/min's in pipe
Flow velocity is passed through N2Under the conditions of anaerobism and 400 DEG C, it is pyrolyzed 4~8h, the charcoal is prepared into, then by ground 60 mesh of charcoal
It sieves into powdered；
(2) by FeCl3·6H2O and FeCl2·4H2Two kinds of soluble ferric iron salt substances of O are 2:1, mixed dissolution with molar ratio
In 0.45molL-1In HCl solution, mixed solution is obtained；It after completely dissolution, will be above-mentioned mixed under intense mechanical stirring condition
It closes solution to be added in 7.5% ammonia spirit with volume ratio 1:2, obtains and contain Fe3O4Colloidal mixture；
(3) biological carbon materials are added in above-mentioned colloidal mixture with 50g/L ratio, and in 25 DEG C of thermostat water baths
After heating stirring, vacuum filtration is separated, is dried at 60 DEG C, obtains magnetic modification biological Carbon Materials；
(4) taking Chitosan powder to be dissolved in mass fraction is to form mixed liquor in 1.5% acetum, by the modified life of above-mentioned magnetic
Object Carbon Materials are added in mixed liquor with 90g/L mass ratio, and the heating stirring in 25 DEG C of water-baths, are mixed after cooling
Suspension；
(5) by above-mentioned mixing suspension with 1:1.8 volume ratio, being slowly added into mass fraction is in 15%NaOH solution, and
Continue to be stirred, after vacuum filtration separation is sufficiently washed with deionized water, 55 DEG C of drying obtain the modified life of the compound magnetic of chitosan
Object Carbon Materials.
Embodiment 4
Present embodiments provide a kind of modified biological carbon materials of the compound magnetic of chitosan, be mainly prepared by the following steps and
At:
(1) corn stover material is taken, is put into be pyrolyzed in tube furnace after dry, crushing and fire, with 400mL/min's in pipe
Flow velocity is passed through N2Under the conditions of anaerobism and 450 DEG C, it is pyrolyzed 4~8h, the charcoal is prepared into, then by ground 60 mesh of charcoal
It sieves into powdered；
(2) by FeCl3·6H2O and FeCl2·4H2Two kinds of soluble ferric iron salt substances of O are 2:1, mixed dissolution with molar ratio
In 0.4molL-1In HCl solution, mixed solution is obtained；After completely dissolution, under intense mechanical stirring condition, by above-mentioned mixing
Solution is added in 7.5% ammonia spirit with volume ratio 1:2, is obtained and is contained Fe3O4Colloidal mixture；
(3) biological carbon materials are added in above-mentioned colloidal mixture with 55g/L ratio, and in 25 DEG C of thermostat water baths
After heating stirring, vacuum filtration is separated, is dried at 60 DEG C, obtains magnetic modification biological Carbon Materials；
(4) taking Chitosan powder to be dissolved in mass fraction is to form mixed liquor in 2.0% acetum, by the modified life of above-mentioned magnetic
Object Carbon Materials are added in mixed liquor with 80g/L mass ratio, and the heating stirring in 25 DEG C of water-baths, are mixed after cooling
Suspension；
(5) by above-mentioned mixing suspension with 1:2.4 volume ratio, being slowly added into mass fraction is in 15%NaOH solution, and
Continue to be stirred, after vacuum filtration separation is sufficiently washed with deionized water, 60 DEG C of drying obtain the modified life of the compound magnetic of chitosan
Object Carbon Materials.
Embodiment 5
Present embodiments provide a kind of modified biological carbon materials of the compound magnetic of chitosan, be mainly prepared by the following steps and
At:
(1) water intaking rice straw material is put into be pyrolyzed in tube furnace after dry, crushing and fire, with 400mL/min's in pipe
Flow velocity is passed through N2Under the conditions of anaerobism and 500 DEG C, it is pyrolyzed 4~8h, the charcoal is prepared into, then by ground 60 mesh of charcoal
It sieves into powdered；
(2) by FeCl3·6H2O and FeCl2·4H2Two kinds of soluble ferric iron salt substances of O are 2:1, mixed dissolution with molar ratio
In 0.3molL-1In HCl solution, mixed solution is obtained；After completely dissolution, under intense mechanical stirring condition, by above-mentioned mixing
Solution is added in 6% ammonia spirit with volume ratio 1:2.5, is obtained and is contained Fe3O4Colloidal mixture；
(3) biological carbon materials are added in above-mentioned colloidal mixture with 60g/L ratio, and in 25 DEG C of thermostat water baths
After heating stirring, vacuum filtration is separated, is dried at 60 DEG C, obtains magnetic modification biological Carbon Materials；
(4) taking Chitosan powder to be dissolved in mass fraction is to form mixed liquor in 1.5% acetum, by the modified life of above-mentioned magnetic
Object Carbon Materials are added in mixed liquor with 95g/L mass ratio, and the heating stirring in 25 DEG C of water-baths, are mixed after cooling
Suspension；
(5) by above-mentioned mixing suspension with 1:1.8 volume ratio, being slowly added into mass fraction is in 10%NaOH solution, and
Continue to be stirred, after vacuum filtration separation is sufficiently washed with deionized water, 55 DEG C of drying obtain the modified life of the compound magnetic of chitosan
Object Carbon Materials.
Embodiment 6
Present embodiments provide a kind of modified biological carbon materials of the compound magnetic of chitosan, be mainly prepared by the following steps and
At:
(1) water intaking rice straw material is put into be pyrolyzed in tube furnace after dry, crushing and fire, with 400mL/min's in pipe
Flow velocity is passed through N2Under the conditions of anaerobism and 550 DEG C, it is pyrolyzed 4~8h, the charcoal is prepared into, then by ground 60 mesh of charcoal
It sieves into powdered；
(2) by FeCl3·6H2O and FeCl2·4H2Two kinds of soluble ferric iron salt substances of O are 2:1, mixed dissolution with molar ratio
In 0.25molL-1In HCl solution, mixed solution is obtained；It after completely dissolution, will be above-mentioned mixed under intense mechanical stirring condition
It closes solution to be added in 6% ammonia spirit with volume ratio 1:2.5, obtains and contain Fe3O4Colloidal mixture；
(3) biological carbon materials are added in above-mentioned colloidal mixture with 70g/L ratio, and in 25 DEG C of thermostat water baths
After heating stirring, vacuum filtration is separated, is dried at 60 DEG C, obtains magnetic modification biological Carbon Materials；
(4) taking Chitosan powder to be dissolved in mass fraction is to form mixed liquor in 1.0% acetum, by the modified life of above-mentioned magnetic
Object Carbon Materials are added in mixed liquor with 70g/L mass ratio, and the heating stirring in 25 DEG C of water-baths, are mixed after cooling
Suspension；
(5) by above-mentioned mixing suspension with 1:1.2 volume ratio, being slowly added into mass fraction is in 12%NaOH solution, and
Continue to be stirred, after vacuum filtration separation is sufficiently washed with deionized water, 60 DEG C of drying obtain the modified life of the compound magnetic of chitosan
Object Carbon Materials.
Reference examples 1
This reference examples provides a kind of biological carbon materials based on residual biomass pyrolysis preparation, mainly by following steps system
It is standby to form:
Wheat stalk material is taken, is put into be pyrolyzed in tube furnace after dry, crushing and fire, with the stream of 400mL/min in pipe
Speed is passed through N2Under the conditions of anaerobism and 300 DEG C, be pyrolyzed 8h, be prepared into the charcoal, then by ground 60 mesh of charcoal at
It is powdered；
Reference examples 2
This reference examples provides a kind of biological carbon materials based on residual biomass pyrolysis preparation, mainly by following steps system
It is standby to form:
Corn stover material is taken, is put into be pyrolyzed in tube furnace after dry, crushing and fire, with the stream of 400mL/min in pipe
Speed is passed through N2Under the conditions of anaerobism and 400 DEG C, be pyrolyzed 6h, be prepared into the charcoal, then by ground 60 mesh of charcoal at
It is powdered；
Reference examples 3
This reference examples provides a kind of biological carbon materials based on residual biomass pyrolysis preparation, mainly by following steps system
It is standby to form:
Water intaking rice straw material is put into be pyrolyzed in tube furnace after dry, crushing and fire, with the stream of 400mL/min in pipe
Speed is passed through N2Under the conditions of anaerobism and 500 DEG C, be pyrolyzed 4h, be prepared into the charcoal, then by ground 60 mesh of charcoal at
It is powdered.
The compound magnetic modification biological Carbon Materials of chitosan provided in the above embodiments 1~6 of equivalent, comparative example 1~3 are provided
The biological carbon materials of middle offer are in temperature respectively to be added in heavy metal cadmium soil under 0.5% and 2% additive amount
Under the conditions of 25 DEG C ± 1 DEG C and 60% field saturation moisture capacity, reaction is cultivated in the mixing carried out 45 days, obtains the removal of heavy metal Cd
Rate (%) and soil pH value result such as the following table 1:
Stabilisation repairing effect of the different modification biological Carbon Materials additions of table 1 to heavy metal Cd
As shown in Table 1, reference examples 1~3, the modified biological raw material of wood-charcoal of the compound magnetic of the chitosan that Examples 1 to 6 provides are compared
Material, under 0.5% and 2% additive amount, enhances the adsorption capacity of heavy metal ion, significantly increases to heavy metal in soil
The stabilisation of Cd available state reduces efficiency, and such as under 0.5% additive amount, available state Cd maximum reduction amount is 35.56%, and 2%
Under additive amount, available state Cd maximum reduction amount has reached 55.84%.Meanwhile modification biological Carbon Materials add in above embodiments
Add, also there is preferable raising improvement result to soil pH value, and then the available state that can reduce heavy metal Cd to a certain degree contains
Amount.The biological carbon materials provided in reference examples 1~3, due to not carrying out based on chitosan and magnetic material in terms of modifying and decorating,
It is relatively poor to the adsorption capacity of heavy metal and the improvement ability of soil pH, thus to the stabilisation efficiency of heavy metal Cd compared with
It is low.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
Various techniques or technical solution with present inventive concept without substantial differences are in protection scope of the present invention.
Claims (10)
1. a kind of preparation method of the compound magnetic modification biological Carbon Materials of chitosan, which comprises the following steps:
Prepare charcoal powder；
Prepare Fe3O4Colloidal mixture
Biological powdered carbon is added in above-mentioned colloidal mixture, after heating stirring, vacuum filtration is separated, dried at 60 DEG C, is obtained
Magnetic modification biological Carbon Materials；
It takes Chitosan powder to be dissolved in acetum and forms mixed liquor；Above-mentioned magnetic modification biological Carbon Materials are added in mixed liquor
Stirring obtains mixing suspension after cooling；
Above-mentioned mixing suspension is added in NaOH solution, and continues to be stirred, vacuum filtration separation and deionized water are abundant
After washing, drying obtains the compound magnetic modification biological Carbon Materials of chitosan.
2. the preparation method of the compound magnetic modification biological Carbon Materials of chitosan as described in claim 1, which is characterized in that described
The step of preparing charcoal powder specifically:
Biological material is taken, is put into be pyrolyzed in tube furnace after dry, crushing and fire, under the conditions of anaerobism and 300~600 DEG C, heat
Solve 4~8h, be prepared into the charcoal, then charcoal is ground up, sieved into it is powdered, it is spare；The anaerobic condition passes through
N is passed through with the flow velocity of 400mL/min into pipe2It realizes.
3. the preparation method of the compound magnetic modification biological Carbon Materials of chitosan as described in claim 1, which is characterized in that described
Prepare Fe3O4The step of colloidal mixture specifically:
By FeCl3·6H2O and FeCl2·4H2Two kinds of soluble ferric iron salt material mixings of O are dissolved in HCl solution, and it is molten to obtain mixing
Liquid；After completely dissolution, under intense mechanical stirring condition, mixed solution described above is added in ammonia spirit, is contained
Fe3O4Colloidal mixture.
4. the preparation method of the compound magnetic modification biological Carbon Materials of chitosan as claimed in claim 3, which is characterized in that described
FeCl3·6H2O and FeCl2·4H2The molar ratio of two kinds of soluble ferric iron salts of O is 2:1, the concentration of HCl solution used is 0.2~
0.5mol·L-1。
5. the preparation method of the compound magnetic modification biological Carbon Materials of chitosan as claimed in claim 3, which is characterized in that described
Ammonia spirit concentration is 5%~10%, and the volume ratio with mixed solution described in (2) is 1.5:1~3:1.
6. the preparation method of the compound magnetic modification biological Carbon Materials of chitosan as described in claim 1, which is characterized in that described
The mixed proportion of biological carbon materials and colloidal mixture is 40~75g/L.
7. the preparation method of the compound magnetic modification biological Carbon Materials of chitosan as described in claim 1, which is characterized in that described
Acetum mass fraction is 0.8%~3%, the mass ratio of the magnetic modification biological Carbon Materials and mixed liquor is 60~
100g/L。
8. the preparation method of the compound magnetic modification biological Carbon Materials of chitosan as described in claim 1, which is characterized in that described
NaOH solution mass fraction is 10%~15%, is 1:1~3:1 with the volume ratio for mixing suspension, and the drying condition is 55
~60 DEG C.
9. the compound magnetic modification biological Carbon Materials of chitosan described in claim 1 are in heavy metal cadmium soil remediation field
Using.
10. a kind of compound magnetic modification biological Carbon Materials of chitosan are applied to the method for heavy-metal contaminated soil reparation, including as follows
Step: modification biological Carbon Materials described in claim 1 are added in the soil by heavy metal pollution, then plus predetermined amount go from
Sub- water is sufficiently mixed, and is carried out constant-temperature moisture-keeping to the soil of above-mentioned processing and is cultivated reaction, the soil by heavy metal pollution can be realized
It stabilizes and repairs；The modification biological Carbon Materials addition weight ratio is every kilogram of soil 0.5%~3%；The deionized water
Additive amount be the 60% horizontal of field capacity；The time for cultivating reaction is 15~60 days.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110354804A (en) * | 2019-07-29 | 2019-10-22 | 江西省科学院 | A kind of its application of the preparation method of wetland plant and pig manure compound bio charcoal |
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| EP3760605A1 (en) * | 2019-07-01 | 2021-01-06 | Vysoká skola technická a ekonomická v Ceskych Budejovicich | Method of phosphorus recovery from wastewater, in particular from sludge water |
| US11124461B2 (en) | 2019-07-04 | 2021-09-21 | Incitec Pivot Limited | Fertilizer |
| US11691929B2 (en) | 2019-07-04 | 2023-07-04 | Incitec Fertilizers Pty Limited | Fertiliser |
| CN110354804A (en) * | 2019-07-29 | 2019-10-22 | 江西省科学院 | A kind of its application of the preparation method of wetland plant and pig manure compound bio charcoal |
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| CN112755962A (en) * | 2021-01-25 | 2021-05-07 | 中国地质大学（北京） | Adsorbing material for removing lead, copper and cadmium in underground water and preparation method and application thereof |
| CN114424773A (en) * | 2021-12-23 | 2022-05-03 | 西南交通大学 | Environment-friendly magnetic biochar sponge and preparation method and application thereof |
| CN114424773B (en) * | 2021-12-23 | 2022-08-12 | 西南交通大学 | Environment-friendly magnetic biochar sponge and preparation method and application thereof |
| CN114405468A (en) * | 2022-01-25 | 2022-04-29 | 西南科技大学 | Preparation method of sphagnum charcoal adsorbent |
| CN114713198A (en) * | 2022-03-31 | 2022-07-08 | 江苏宿迁润泰环保科技有限公司 | Multifunctional environment-friendly adsorption material and application thereof |
| CN115159669A (en) * | 2022-06-27 | 2022-10-11 | 中国电建集团中南勘测设计研究院有限公司 | Aerobic suspension carrier and preparation method thereof |
| CN115159669B (en) * | 2022-06-27 | 2023-09-26 | 中国电建集团中南勘测设计研究院有限公司 | Aerobic suspension carrier and preparation method thereof |
| CN115873605A (en) * | 2022-10-25 | 2023-03-31 | 塔里木大学 | Chitosan biochar carbon-based water-retaining material and preparation method and application thereof |
| CN115784469A (en) * | 2022-12-19 | 2023-03-14 | 华南农业大学 | Modified biochar composite material for embedding flora and preparation and application thereof |
| CN116393091A (en) * | 2023-03-16 | 2023-07-07 | 生态环境部南京环境科学研究所 | Preparation method and application of mixed modified biochar |
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