CN107159152A - A kind of cellulose modified activated carbon heavy-metal adsorption material and preparation method and application - Google Patents
A kind of cellulose modified activated carbon heavy-metal adsorption material and preparation method and application Download PDFInfo
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- 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
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
Recycled the invention belongs to biomass resource and environmental functional new material technology field, more particularly to a kind of cellulose modified activated carbon heavy-metal adsorption material (CAC NA) and preparation method and the application in environmental improvement reparation field, particularly repairing heavy metal pollution, such as heavy metal adsorption field.Preparation method of the present invention comprises the following steps：(1) heat up cellulose charing in a nitrogen atmosphere, obtains cellulose charcoal；(2) cellulose charcoal is mixed with highly basic, water, dries, obtain cellulolytic activity charcoal alkali；Processing is heated, cellulolytic activity charcoal is obtained；(3) cellulolytic activity charcoal is mixed with concentrated nitric acid, heating stirring reaction is filtered, washs, dried, obtains cellulose modified activated carbon heavy-metal adsorption material.The cellulose modified activated carbon heavy-metal adsorption material of gained has adsorption rate capacity high, and the features such as clearance is high, its heavy metal cadmium adsorption capacity reaches 368mg/g, is a kind of heavy metal absorbent of function admirable.
Description
Technical field
Recycled the invention belongs to biomass resource and environmental functional new material technology field, more particularly to a kind of cellulose
Modified activated carbon heavy-metal adsorption material (CAC-NA) and preparation method and the application in environmental improvement reparation field, particularly
Repairing heavy metal pollution, such as heavy metal adsorption field.
Background technology
With the fast development of the industries such as mining industry, chemical fertilizer, agricultural chemicals, battery, metallurgy and electrical equipment manufacture, contain heavy metal
Waste be directly or indirectly discharged into environment and cause serious environmental pollution.Heavy metal pollution is due to its strong toxicity, duration
Long and bio-refractory, causes the extensive concern of society.Being discharged into heavy metal in environment can be by the work of food chain
With, into human body, and endanger the mankind health even life.Therefore, the control and improvement of heavy metal pollution have become respectively
It is badly in need of the environmental problem properly settled in state's environmental protection.
Include currently for the Treatment process of heavy metal-polluted water：Membrane technology, ion exchange, chemical precipitation, absorption method
Etc. method；Include for the restorative procedure of heavy metal pollution of soil：Engineering reparation, phytoremediation, biological prosthetic and physical chemistry
The methods such as absorption.Wherein, absorption method is applied to water body and soil, and with sorbing material wide material sources, adsorption capacity is big, adsorb speed
Degree is fast, removal efficiency is high, it is easy to operate the advantages of.Exploitation easily preparation, low cost, efficiency high, the high property for not producing secondary pollution
The improvement of energy adsorbent heavy metal plays an important roll.
Activated carbon has the property of big pore structure prosperity, specific surface area, chemically reactive modification and good adsorption performance, wide
The general impurity being applied in food, pharmaceuticals industry removes, decolourized and environmental pollution improvement and Industrial Catalysis agent carrier etc..Fiber
Element is the main component of agricultural wastes, and wherein the cellulose accounting in cereal crops stalk is about 40% or so.With cellulose
As the raw material of activated carbon, abundant stalk resource is taken full advantage of, the new way of straw utilization is opened, reaching turns waste into wealth
Purpose.
Cheng [Ecological Engineering, 87 (2016) 240-245.] etc. have studied to be prepared by peanut shell
Activated carbon heavy metal cadmium absorption research, have studied shadow of the varying environment factor to Activated Carbon Made from Peanut Shells adsorbing heavy metal cadmium
Ring.Under optimal adsorption Conditions Condition, the clearance of cadmium reaches 99.9%, counterweight in Activated Carbon Made from Peanut Shells heavy metal cadmium solution
The absorption property of cadmium metal is better than peanut shell itself.J.H.Park [Chemosphere, 142 (2016) 77-83.] etc. is prepared for
The absorption that straw-stem active charcoal is used for various heavy is studied, and compares its absorption property to one pack system lead, cadmium, chromium, copper and zinc,
And have studied the competitive Adsorption situation in the presence of various ingredients.Adsorption capacity order lead in the case of one pack system>
Cadmium>Chromium>Copper>Zinc, the strong and weak order of multi component adsorption competition is lead>Copper>Chromium>Zinc>Cadmium.
Patent CN105944672A discloses one kind raw material based on shrimp shell, and phospha is prepared for using phosphoric acid low temperature calcination
Change charcoal absorption agent material, and have studied its absorption property to dye of positive ion methylene blue.Patent CN106179207A
Disclose a kind of utilization agriculture and forestry organic waste material chestnut shell and prepare the method for activated carbon, and test its adsorptivity to indoor formaldehyde
Energy.
From the point of view of existing research, the cellulose in agricultural wastes is made full use of, efficient, tool is prepared by simple method
There are universality and the active carbon adsorption material of chemical functional group's modification still to need further research.
The content of the invention
In order to overcome the shortcomings and deficiencies of the prior art described above, primary and foremost purpose of the invention is that providing a kind of cellulose changes
The preparation method of property activated carbon heavy-metal adsorption material (CAC-NA).
Another object of the present invention is to provide cellulose modified activated carbon heavy-metal adsorption material prepared by the above method
(CAC-NA)。
Still a further object of the present invention is to provide above-mentioned cellulose modified activated carbon heavy-metal adsorption material (CAC-NA) in ring
The application that border is administered in reparation field, is particularly suitable for use in repairing heavy metal pollution, such as heavy metal adsorption field.
The purpose of the present invention is realized by following proposal：
A kind of preparation method of cellulose modified activated carbon heavy-metal adsorption material (CAC-NA), comprises the following steps：
(1) heat up cellulose charing in a nitrogen atmosphere, obtains cellulose charcoal (CAC)；
(2) cellulose charcoal is mixed with highly basic, water, dries, obtain cellulolytic activity charcoal-alkali (CAC-base)；By itself plus
Heat treatment, obtains cellulolytic activity charcoal；
(3) cellulolytic activity charcoal is mixed with concentrated nitric acid, heating stirring reaction is filtered, washs, dried, obtains cellulose
Modified activated carbon heavy-metal adsorption material (CAC-NA).
The speed of step (1) described heating is 3~8 DEG C/min, preferably 5 DEG C/min.Step (1) heating preferably adds
Heat is to 250~350 DEG C, more preferably 300 DEG C.
The soaking time of step (1) described charing is 40~80min, preferably 60min.
Step (1) described charing can be carried out in tube furnace.
The mass ratio of cellulose charcoal and highly basic used is 1 in step (2):2~1:4, preferably 1:3.
Highly basic described in step (2) can be sodium hydroxide, potassium hydroxide etc., preferably potassium hydroxide.
The concentration of highly basic is preferably 20~40wt% in mixed system described in step (2), more preferably 30wt%.
Drying described in step (2) can be carried out in an oven.Described drying is preferably to be dried at 70~90 DEG C, more
Preferably 80 DEG C.
The heating rate heated described in step (2) is 3~8 DEG C/min, preferably 5 DEG C/min.
Heat described in step (2) is preferably to be heated to 550~850 DEG C, more preferably 700 DEG C.
The soaking time heated described in step (2) is 30~240min, preferably 60min.
Heat described in step (2) and preferably carry out in a nitrogen atmosphere.
Heating described in step (2) can be carried out in tube furnace.
The mass ratio of cellulolytic activity charcoal and concentrated nitric acid used is 1 in step (3):10~1:5.
The concentration of concentrated nitric acid described in step (3) is 20~40%, preferably 30%.
The temperature heated described in step (3) is 60~80 DEG C, preferably 70 DEG C.
Heating described in step (3) is preferably to use oil bath heating.
The time stirred described in step (3) is preferably 2~4h, more preferably 3h.
Washing uses water washing described in step (3), preferably washs to neutrality.
It is preferably 6~24h of vacuum drying to be dried described in step (3), more preferably dries 12h.
Dry and carried out preferably at 20~40 DEG C described in step (3), more preferably 30 DEG C.
The present invention also provides the cellulose modified activated carbon heavy-metal adsorption material (CAC-NA) that the above method is prepared.
The inventive method is using cellulose as raw material, and it is a kind of natural biomass resource, is the master in agricultural wastes
Want composition, with wide material sources, it is cheap, rich in heavy metal adsorption active function groups and adsorption site, easily biological-degradable, right
The advantages of environmental nonpollution, be used for heavy metal adsorption as sorbing material, taken naturally, return in natural process,
Realize the recycling of agriculture waste biomass resource.And the inventive method preparation technology is simple, easy to operate, is easy to scale
Industrial production and application.
The inventive method carries out nitric acid treatment to cellulose, introduces nitrogen-containing functional group, adds the adsorption site of activated carbon；
Part of hydroxyl in cellulolytic activity charcoal is oxidized to carboxyl, the activity of adsorption site is added.
The present invention handles obtained sorbing material by physical chemistry, and specific surface area and pore volume are big, and with mesoporous
Structure is the absorption of heavy metal while providing physical absorption space and chemisorbed avtive spot, greatly improves adsorption material
The absorption property of material, clearance high the features such as high with adsorption rate capacity, thus it has well in heavy metal adsorption field
Cost advantage and application prospect, can be widely applied in environmental improvement reparation field, are particularly suitable for use in repairing heavy metal pollution,
As in heavy metal adsorption field.Sorbing material of the present invention is applied in heavy metal adsorption, its heavy metal cadmium adsorption capacity reaches
It is a kind of heavy metal absorbent of function admirable to 368mg/g.
The present invention has the following advantages and beneficial effect relative to prior art：
(1) sorbing material of the invention, its raw cellulose is the main component in agricultural wastes, wide material sources, valency
Lattice are cheap, realize the recycling of agriculture waste biomass resource.
(2) absorption of sorbent material heavy metal of the invention has broad applicability.Heavy metal pollution in environment
Mostly it is that various heavy pollution exists simultaneously although there is the difference of current potential exceeding standard rate height, therefore with suitable extensively
It is highly desirable to property.
(3) sorbing material of the invention, while having taken into account the physical absorption in adsorption process and chemisorbed, adsorption rate is held
Amount is high, and clearance is high.
(4) preparation technology of the invention is simple, easy to operate, is easy to scale industrial production and application.
Brief description of the drawings
Fig. 1 is the CAC-NA-700 of embodiment 1 infrared spectrogram.
Fig. 2 is the CAC-NA-700 of embodiment 1 specific surface area curve.
Fig. 3 is the CAC-NA-700 of embodiment 1 pore size distribution curve.
Fig. 4 schemes for the CAC-NA-700 of embodiment 1 SEM.
Fig. 5 is the CAC-NA-700 of embodiment 1 XRD.
Fig. 6 is the time of contact of embodiment 4 to cellulolytic activity charcoal adsorbing heavy metal cadmium performance impact.
Fig. 7 is the adsorbent dosage of embodiment 4 to cellulolytic activity charcoal adsorbing heavy metal cadmium performance impact.
Fig. 8 is the cadmium initial concentration of embodiment 4 to cellulolytic activity charcoal adsorbing heavy metal cadmium performance impact.
Fig. 9 is the pH of embodiment 4 to cellulolytic activity charcoal adsorbing heavy metal cadmium performance impact.
Figure 10 is the temperature of embodiment 4 to cellulolytic activity charcoal adsorbing heavy metal cadmium performance impact.
Embodiment
With reference to embodiment, the present invention is described in further detail, but the implementation of the present invention is not limited to this.
The reagent that the following example is used can be obtained from commercial channel.
Wherein, adsorption experiment step is as follows：Cellulolytic activity charcoal is added in heavy metal solution, concentration be 10~
500mg/L, adsorbent dosage be 2~100mg, pH value be 2~7, time of contact be 10min~10h, temperature be 283~
313K, with 150rpm speed oscillation, is then separated by filtration.
Embodiment 1：A kind of preparation of cellulose modified active carbon adsorption material
Cellulose is placed in tube furnace, 300 DEG C are warming up to 5 DEG C/min heating rate, the N in the case where continuing2Air-flow
Lower insulation 60min charings, obtain cellulose charcoal (CAC)；By above-mentioned cellulose charcoal and potassium hydroxide according to 1:3 mass ratio is mixed
Close, then add deionized water thereto, keep the concentration of lye of 30wt% concentration.Above-mentioned solution is placed in 80 DEG C of baking oven and done
It is dry, obtain cellulolytic activity charcoal-potassium hydroxide (CAC-KOH)；Above-mentioned cellulolytic activity charcoal-alkali is placed in tube furnace, with 5
DEG C/min heating rate is warming up to 700 DEG C, the N in the case where continuing260min is incubated under air-flow, cellulolytic activity charcoal (CAC- is obtained
700)；By above-mentioned cellulolytic activity charcoal and 30% concentrated nitric acid according to 1:7.5 mass ratio mixing, under 70 DEG C of oil bath temperature
Stirring reaction 3h, by filtering, then is washed with deionized to neutrality, is dried in vacuo 12h at 30 DEG C, obtains the heavy metal
Sorbing material (CAC-NA-700).
Constituted using infrared spectrum measurement CAC-NA-700 chemical functional group, BET determines CAC-NA-700 ratio surface
Product and pore-size distribution, its crystalline texture of XRD determining, its pattern of sem analysis, are shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.By infrared light
Spectrum is visible, and the CAC-NA-700 after nitric acid treatment is in 1700cm-1There is the stretching vibration peak of carboxyl in place.By nitric acid oxidation
Cellulolytic activity charcoal afterwards, it is that the diffraction maximum at 22 degree of diffraction maximums gone out, 15 degree is wholly absent to remain 2 θ angles, illustrates cellulose
Middle related crystalline structure is destroyed completely, while introducing new peak at 43 degree, it may be possible to which hydroxyl is oxidized into what carboxyl was brought
Change.Characterized by BET, CAC-NA-700 specific surface area is 597.7m2/ g, pore volume is 0.36cm3/ g, aperture is
3.23nm, can see clearly loose structure in SEM figures.
Embodiment 2：A kind of preparation of cellulose modified active carbon adsorption material
Cellulose is placed in tube furnace, 250 DEG C are warming up to 3 DEG C/min heating rate, the N in the case where continuing2Air-flow
Lower insulation 80min charings, obtain cellulose charcoal (CAC)；By above-mentioned cellulose charcoal and potassium hydroxide according to 1:2 mass ratio is mixed
Close, then add deionized water thereto, keep the concentration of lye of 20wt% concentration.Above-mentioned solution is placed in 70 DEG C of baking oven and done
It is dry, obtain cellulolytic activity charcoal-potassium hydroxide (CAC-KOH)；Above-mentioned cellulolytic activity charcoal-alkali is placed in tube furnace, with 3
DEG C/min heating rate is warming up to 550 DEG C, the N in the case where continuing2240min is incubated under air-flow, cellulolytic activity charcoal is obtained
(CAC-550)；By above-mentioned cellulolytic activity charcoal and 20% concentrated nitric acid according to 1:10 mass ratio mixing, in 60 DEG C of oil bath temperature
The lower stirring reaction 2h of degree, by filtering, then is washed with deionized to neutrality, 24h is dried in vacuo at 20 DEG C, obtains described heavy
Metal-adsorbing material (CAC-NA-550).Constituted using infrared spectrum measurement CAC-NA-550 chemical functional group, BET is determined
CAC-NA-550 specific surface area and pore-size distribution, its crystalline texture of XRD determining, its pattern of sem analysis.
Embodiment 3：A kind of preparation of cellulose modified active carbon adsorption material
Cellulose is placed in tube furnace, 350 DEG C are warming up to 8 DEG C/min heating rate, the N in the case where continuing2Air-flow
Lower insulation 40min charings, obtain cellulose charcoal (CAC)；By above-mentioned cellulose charcoal and potassium hydroxide according to 1:4 mass ratio is mixed
Close, then add deionized water thereto, keep the concentration of lye of 40wt% concentration.Above-mentioned solution is placed in 90 DEG C of baking oven and done
It is dry, obtain cellulolytic activity charcoal-potassium hydroxide (CAC-KOH)；Above-mentioned cellulolytic activity charcoal-alkali is placed in tube furnace, with 8
DEG C/min heating rate is warming up to 850 DEG C, the N in the case where continuing230min is incubated under air-flow, cellulolytic activity charcoal (CAC- is obtained
850)；By above-mentioned cellulolytic activity charcoal and 40% concentrated nitric acid according to 1:5 mass ratio mixing, is stirred under 60 DEG C of oil bath temperature
Reaction 4h is mixed, by filtering, then is washed with deionized to neutrality, 6h is dried in vacuo at 30 DEG C, the heavy metal is obtained and inhales
Enclosure material (CAC-NA-850).Constituted using infrared spectrum measurement CAC-NA-850 chemical functional group, BET determines CAC-NA-
850 specific surface area and pore-size distribution, its crystalline texture of XRD determining, its pattern of sem analysis.
Embodiment 4：The performance of cellulolytic activity charcoal adsorbing heavy metal cadmium
(1) time of contact is to cellulolytic activity charcoal adsorbing heavy metal cadmium performance impact
Adsorption capacity and clearance under different times of contact is as shown in Figure 6.Experiment condition is set as initial Cd2+It is dense
Spend for 200mg/L (ppm), pH value be 5.5 the original solution of any soda acid (not plus), liquor capacity is 20mL, and adsorbent is added
Measure as 20mg, in 298K, rotating speed is to handle under 150rpm.Adsorption time elects 10min, 0.5h, 2h, 4h, 6h and 10h as respectively.
CAC-NA-700 adsorption capacity and clearance shows the trend tended to be steady after identical first quick increase.Preceding 30min is left
The right side, curve steeply rises, and the increase of cadmium adsorption capacity is very fast, is the initial quick adsorption stage；Hereafter though adsorption capacity has increase,
Curve tends towards stability, and adsorption capacity only increases on a small quantity, about 1h or so, and absorption reaches nearly balance.
(2) adsorbent dosage is to cellulolytic activity charcoal adsorbing heavy metal cadmium performance impact
Adsorption capacity and clearance under the conditions of different adsorbent dosages is as shown in Figure 7.Experiment condition is set as
Initial Cd2+Concentration is 200mg/L (ppm), and pH value is 5.5, and liquor capacity is 20mL, in 298K, and rotating speed is processing under 150rpm
1h.Adsorbent dosage elects 2mg, 5mg, 10mg, 30mg, 50mg and 100mg as respectively.With the increase of dosage, adsorbent
Adsorption capacity gradually reduce, clearance gradually rises, and finally reaches 90% or so.When adsorbent dosage is 2mg, CAC-
NA-700 adsorption capacity is up to 368mg/g.
(3) cadmium initial concentration is to cellulolytic activity charcoal adsorbing heavy metal cadmium performance impact
In different Cd2+Adsorption capacity and clearance under the conditions of initial concentration solution is as shown in Figure 8.Experiment condition is set
It is 5.5 for solution ph, liquor capacity is 20mL, adsorbent dosage is 20mg, in 298K, rotating speed is processing under 150rpm
1h。Cd2+Initial concentration solution elects 10ppm, 50ppm, 100ppm, 200ppm, 350ppm and 500ppm as respectively.With concentration
Increase, adsorbent is consequently increased to the adsorption capacity of cadmium, and almost linear growth, the removal rate of adsorbent is gradually reduced.
When the concentration of cadmium is 500mg/L, CAC-NA-700 adsorption capacity reaches 352.8mg/g.
(4) pH is to cellulolytic activity charcoal adsorbing heavy metal cadmium performance impact
Adsorption capacity and clearance under different adsorbent solution pH value conditions is as shown in Figure 9.Experiment condition is set as
Initial Cd2+Concentration is 200mg/L (ppm), and liquor capacity is 20mL, and adsorbent dosage is 20mg, and in 298K, rotating speed is
1h is handled under 150rpm.PH value condition elects 2.0,3.0,4.0,5.0,6.0 and 7.0 as respectively.When relatively low in pH value when
(2.0~4.0), the adsorption capacity of adsorbent increases sharply；When pH value is more than 4.0, adsorption capacity, which increases, becomes slow,
Substantially tend towards stability；When pH value is 7.0, CAC-NA-700 adsorption capacity is 162.8mg/g.With the increase of pH value, inhale
Attached dose of clearance also increases.In the case of adsorbent mass and initial concentration identical, adsorption capacity is bigger, and clearance is got over
It is high.
(5) temperature is to cellulolytic activity charcoal adsorbing heavy metal cadmium performance impact
Adsorption capacity and clearance under different adsorption temps is as shown in Figure 10.Experiment condition is set as initial Cd2+It is dense
Spend for 200mg/L (ppm), pH value is 5.5, liquor capacity is 20mL, adsorbent dosage is 20mg, rotating speed is to locate under 150rpm
Manage 1h.Temperature elects 283K, 288K, 293K, 298K, 303K, 308K and 313K as respectively.With the rise of temperature, five kinds of absorption
The adsorption capacity and clearance of agent have a certain degree of increase.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (10)
1. a kind of preparation method of cellulose modified activated carbon heavy-metal adsorption material, it is characterised in that comprise the following steps：
(1) heat up cellulose charing in a nitrogen atmosphere, obtains cellulose charcoal；
(2) cellulose charcoal is mixed with highly basic, water, dries, obtain cellulolytic activity charcoal-alkali；Processing is heated, fiber is obtained
Plain activated carbon；
(3) cellulolytic activity charcoal is mixed with concentrated nitric acid, heating stirring reaction is filtered, washs, dried, obtains cellulose modified
Activated carbon heavy-metal adsorption material.
2. the preparation method of cellulose modified activated carbon heavy-metal adsorption material according to claim 1, it is characterised in that：
The speed of step (1) described heating is 3~8 DEG C/min；The heating, which refers to, is heated to 250~350 DEG C；During the insulation of the charing
Between be 40~80min.
3. the preparation method of cellulose modified activated carbon heavy-metal adsorption material according to claim 1, it is characterised in that：
The speed of step (1) described heating is 5 DEG C/min；The heating, which refers to, is heated to 300 DEG C；The soaking time of the charing is
60min。
4. the preparation method of cellulose modified activated carbon heavy-metal adsorption material according to claim 1, it is characterised in that：
The mass ratio of cellulose charcoal and highly basic used is 1 in step (2):2~1:4；The highly basic is sodium hydroxide or potassium hydroxide；Institute
The concentration for stating highly basic in mixed system is 20~40wt%；The heating rate of the heating is 3~8 DEG C/min；It is described to add
It is heat-treated to be heated to 550~850 DEG C；The soaking time of the heating is 30~240min.
5. the preparation method of cellulose modified activated carbon heavy-metal adsorption material according to claim 1, it is characterised in that：
The mass ratio of cellulose charcoal and highly basic used is 1 in step (2):3；The highly basic is potassium hydroxide；It is strong in the mixed system
The concentration of alkali is 30wt%；The heating rate of the heating is 5 DEG C/min；It is described to heat to be heated to 700 DEG C；Institute
The soaking time for stating heating is 60min.
6. the preparation method of cellulose modified activated carbon heavy-metal adsorption material according to claim 1, it is characterised in that：
The mass ratio of cellulolytic activity charcoal and concentrated nitric acid used is 1 in step (3):10~1:5；The concentration of the concentrated nitric acid be 20~
40%；The temperature of the heating is 60~80 DEG C；The time of the stirring is 2~4h；The drying is 6~24h of vacuum drying；
The drying is carried out at 20~40 DEG C.
7. the preparation method of cellulose modified activated carbon heavy-metal adsorption material according to claim 1, it is characterised in that：
The concentration of concentrated nitric acid described in step (3) is 30%；The temperature of the heating is 70 DEG C；The time of the stirring is 3h；It is described
Dry as vacuum drying 12h；The drying is carried out at 30 DEG C.
8. a kind of cellulose modified activated carbon heavy-metal adsorption material, it is characterised in that according to any one of claim 1~7
Preparation method obtain.
9. the answering in environmental improvement reparation field of the cellulose modified activated carbon heavy-metal adsorption material described in claim 8
With.
10. application of the cellulose modified activated carbon heavy-metal adsorption material in heavy metal adsorption field described in claim 8.
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| CN108704611A (en) * | 2018-06-11 | 2018-10-26 | 华南理工大学 | It is a kind of magnetism manganese iron axinite load mesoporous fiber element charcoal composite material and preparation method with application |
| CN109499547A (en) * | 2018-12-06 | 2019-03-22 | 武汉纺织大学 | A kind of preparation method of purifying formaldehyde material |
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| CN110841593A (en) * | 2019-11-11 | 2020-02-28 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of high-capacity adsorption activated carbon applied to volatile organic compounds, product and application thereof |
| CN110841593B (en) * | 2019-11-11 | 2022-04-05 | 上海纳米技术及应用国家工程研究中心有限公司 | Preparation method of high-capacity adsorption activated carbon applied to volatile organic compounds, product and application thereof |
| CN110813235A (en) * | 2019-11-21 | 2020-02-21 | 安徽工业大学 | Nickel ion adsorbent and preparation method thereof |
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| CN111578275A (en) * | 2020-04-03 | 2020-08-25 | 乐清市亿得利燃烧器有限公司 | Combustor with low emission of nitrogen oxides |
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