CN109939642A - A kind of preparation method and application of oxidation modification biomass carbon - Google Patents
A kind of preparation method and application of oxidation modification biomass carbon Download PDFInfo
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- CN109939642A CN109939642A CN201910209741.3A CN201910209741A CN109939642A CN 109939642 A CN109939642 A CN 109939642A CN 201910209741 A CN201910209741 A CN 201910209741A CN 109939642 A CN109939642 A CN 109939642A
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- biomass carbon
- oxidation modification
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- oxidation
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Abstract
The invention discloses a kind of preparation method and applications of oxidation modification biomass carbon, a kind of new charcoal method of modifying --- high-temperature oxidation inexpensive, easy to operate and being easy to large-scale application is provided, it specifically includes and biomass carbon is put into stove, then heat to 200-500 degree, it is maintained 0-2 hours after to assigned temperature, then takes out to obtain.Reinforcing removal of the oxidation modification biomass carbon being prepared for water body and heavy metal in soil and organic pollutant.
Description
Technical field
The invention belongs to technical field of biological environmental protection, and in particular to a kind of oxidation modification biomass carbon.
Background technique
For the removal of heavy metal, nucleic, organic pollutant in waste water or surface water, adsorption technology is considered as most
For one of simple and efficient way.In recent years, as Biofunctional materials research is deeply with development, biomass carbon is due to it
Raw material sources extensively, porous structure, surface rich in the unique advantages such as functional group, as adsorbent material and be applied to water process
It is received more and more attention with environment remediation etc..
Biomass carbon preparation method has: baking, pyrolysis, gasification and hydrothermal carbonization stalk, feces of livestock and poultry, sludge, forestry are useless
Gurry, afforestation waste etc. and obtain.In general, charcoal mainly has two sides to the adsorption mechanism of water pollutant
Face: first is that the surface physics suction-operated as Carbon Materials；Second is that biological carbon surface is rich in can occur absorption, complexing with pollutant
The functional group of reaction, the chemisorption that the contaminant trap contacted, chelating or co-precipitation can be occurred.But
For the first effect, since biological carbon materials specific surface area is often smaller, limited sorption capacity.Such as use willow
It is only 2~4mg/g to uranium ion (U (VI)) adsorption capacity, well below active carbon (10.47mg/g) after branch prepares charcoal
And graphene oxide (138.89mg/g).
Therefore, the application of charcoal is more likely to be modified surface group at present, promotes surface group complexing together
Precipitation enhances chemical adsorption capacity.Some researches show that charcoal Surface oxygen-containing groups (such as-COOH ,-OH) are more, absorption
The ability of the cationics heavy metal such as Cu, Ni, Cd, Pb is stronger, and the two positive correlation, this is mainly due to hydroxyls and carboxyl
Negatively charged (- COO after equal oxygen-containing groups ionization-、-O-), it can effectively be reacted with cationic heavy metal.Based on this principle,
HNO is widely used in domestic and foreign scholars3、H2O2、O3、KMnO4Equal chemical oxidizing agents are modified, to improve biological carbon surface oxygen-containing group
Group's quantity.In addition, also zoic method, i.e., be implanted into microorganism in biological carbon surface, increase its gap to be modified.But useization
It learns medicament and is modified in actual application and there is more drawback, one side operating process is more complex, the dosage control to acid
System is stringent, and technique is more demanding；On the other hand the use of a large amount of chemical modifiers, can generate new environmental contaminants, it is desirable that match
Set builds perfect environmental protection equipment, in addition, the higher cost of chemic modified method.In addition, implantation microorganism method, there is at
This height, problem complicated for operation, is unsuitable for large-scale popularization.
Summary of the invention
For above-mentioned modified problem, the present invention is intended to provide a kind of preparation method of oxidation modification biomass carbon, including such as
Lower step: being warming up to 200-500 degree for biomass carbon, then maintains 0-2 hours at such a temperature, cooling to obtain oxidation modification life
Substance charcoal.
Preferably, the biomass carbon includes: rice straw biomass carbon, cornstalk biological matter charcoal, corncob biology
Matter charcoal, wood chip biomass carbon and active carbon.
Preferably, the oxidation modification biomass carbon includes: rice straw oxidation modification biomass carbon, corn stover oxidation
Modified biomass charcoal, corncob oxidation modification biomass carbon, wood chip oxidation modification biomass carbon and oxidation modification active carbon.
Preferably, the oxidation modification biomass carbon is used for going for water body and heavy metal in soil and organic pollutant
It removes.
Biomass carbon in the present invention is got by buying on the market, and oxidation modification biomass carbon obtained,
It can be used for the reinforcing removal of water body and heavy metal in soil and organic pollutant.And the atmosphere of its heating is not limited, in sky
It is completed in gas atmosphere.In addition oxidation modifying method of the invention is all suitable for all biomass carbons.
Furthermore the high-temperature oxidation that the present invention uses passes through phase using the thermal stability of biomass carbon under the high temperature conditions
Oxidation reaction is carried out to lower high temperature in a relatively short period of time, is unlikely to decompose all biological matter char combustion, to increase
Biomass carbon Surface oxygen-containing groups quantity improves the ability of charcoal absorption Pollutants in Wastewater, realizes oxidation modification charcoal
Large-scale practical application in water treatment field.Such as Fig. 2 and Fig. 3, in acid condition (PH=3), modified corn stalk
Stalk, corncob, wood chip charcoal and active carbon adsorbance be 229.40,350.57,350.61 and 333.33mg/g respectively, point
It is not 2.77,1.79,2.63 and 2.55 times before modified；Under conditions of not adjusting PH, modified corn stover, corncob,
The adsorbance of wood chip charcoal and active carbon is 181.01,319.36,343.27 and 295.34mg/g respectively, is before modified respectively
1.82,1.38,2.34 and 2.00 times.Table 1 is organic member of the rice straw charcoal through 300 degree of high-temperature oxydations, 30 minutes front and backs
The variation of element and content of ashes, as can be seen from the table after high-temperature oxydation, O/C ratio increases, and shows after high-temperature oxydation, biology
Oxygen-containing group quantity increases in charcoal.They are directly demonstrated using high-temperature oxidation of the invention, can increase biological carbon surface
Oxygen-containing group quantity, and then strengthen its ability for removing water body and heavy metal in soil and organic pollutant.
Beneficial effects of the present invention:
It is at low cost, easy to operate and be easy to large-scale application, the furthermore not addition of chemical agent, effect on environment compared with
It is small, it is environmentally protective.
Detailed description of the invention
The modification yield of Fig. 1 different type biomass carbon；
Fig. 2 different type biomass carbon before modified after the adsorption capacity of (PH=3) to methylene blue in acid condition；
Fig. 3 different type biomass carbon before modified after under conditions of not adjusting PH to the adsorption capacity of methylene blue.
Specific embodiment
Technical effect in order to further illustrate the present invention is specifically described the present invention below by embodiment.
Embodiment 1
Cornstalk biological matter charcoal is warming up to 200,300,400 and 500 degree respectively, then maintains 0 under 200 degree respectively
Minute, it maintains 30 minutes under 300 degree, is maintained 1 hour under 400 degree, maintained 2 hours under 500 degree, cooling obtains 4 kinds not
With the oxidation modification biomass carbon of condition.
Embodiment 2
Corncob biomass carbon is warming up to 200,300,400 and 500 degree respectively, then maintains 0 point under 200 degree respectively
Clock maintains 30 minutes under 300 degree, maintains 1 hour under 400 degree, maintains 2 hours under 500 degree, and cooling obtains 4 kinds of differences
The oxidation modification biomass carbon of condition.
Embodiment 3
Wood chip biomass carbon is warming up to 200,300,400 and 500 degree respectively, then maintains 0 point under 200 degree respectively
Clock maintains 30 minutes under 300 degree, maintains 1 hour under 400 degree, maintains 2 hours under 500 degree, and cooling obtains 4 kinds of differences
The oxidation modification biomass carbon of condition.
Embodiment 4
Active carbon is warming up to 200,300,400 and 500 degree respectively, is then maintained 0 minute under 200 degree respectively, 300
Degree is lower to be maintained 30 minutes, is maintained 1 hour under 400 degree, is maintained 2 hours under 500 degree, cooling obtains the oxygen of 4 kinds of different conditions
Change modified biomass charcoal.
Fig. 1 is the modified yield of different type biomass carbon, it will be seen from figure 1 that wood chip biomass carbon is modified
Yield is minimum, is 53%, and the modified yield highest of cornstalk biological matter charcoal, is 90%.Table 1 is rice straw biomass
The variation of organic element and content of ashes of the charcoal through 400 degree of high-temperature oxydations, 30 minutes front and backs, as can be seen from the table through high temperature oxygen
After change, O/C ratio increases, and shows after high-temperature oxydation, and oxygen-containing group quantity increases in charcoal.
The change of organic element and content of ashes of the 1 rice straw biomass carbon of table through 400 degree of high-temperature oxydations, 30 minutes front and backs
Change
1, it investigates to methylene blue adsorption number ability
Different type biomass carbon has been investigated at different conditions to the adsorption capacity of methylene blue, corresponding conditions are as follows:
Concentration is to add biomass carbon, additive amount 0.25g/L, at 25 DEG C, oscillating reactions 300 divides in 100mg/L methylene blue
Clock.PRELIMINARY RESULTS shows that the adsorption capacity highest of the corncob biomass carbon in unmodified four classes material, adsorption capacity are most weak
It is cornstalk biological charcoal.(PH=3) modified corn stover, corncob, wood chip charcoal and work in acid condition
The adsorbance of property charcoal is 229.40,350.57,350.61 and 333.33mg/g respectively, be respectively before modified 2.77,1.79,
2.63 and 2.55 times；Under conditions of not adjusting pH, the suction of modified corn stover, corncob, wood chip charcoal and active carbon
Attached amount is 181.01,319.36,343.27 and 295.34mg/g respectively, is 1.82,1.38,2.34 and 2.00 before modified respectively
Times.As shown in Figures 2 and 3.
2, to the absorption property of heavy metal
2 rice straw biomass carbon of table is through 400 degree of high-temperature oxydations, 10 minutes front and backs to the absorption property of uranium
3 rice straw biomass carbon of table is through 400 degree of high-temperature oxydations, 30 minutes front and backs to the absorption property of cadmium
Finally, it should be noted that the above examples are only used to illustrate the technical scheme of the present invention rather than limits, although ginseng
Technical solution of the present invention is described in detail according to preferred embodiment, it will be appreciated by those skilled in the art that can be to this
The technical solution of invention is modified or replaced equivalently, and without departing from the purpose and scope of the invention, should all be covered at this
In the protection scope of invention.
Claims (6)
1. a kind of preparation method of oxidation modification biomass carbon, which comprises the steps of: biomass carbon to be warming up to
Then 200-500 degree maintains 0-2 hours at such a temperature, cooling obtains oxidation modification biomass carbon.
2. the preparation method of oxidation modification biomass carbon according to claim 1, which is characterized in that the biomass charcoal bag
It includes: rice straw biomass carbon, cornstalk biological matter charcoal, corncob biomass carbon, wood chip biomass carbon and active carbon.
3. the oxidation modification biomass carbon being prepared such as claim 1.
4. oxidation modification biomass carbon according to claim 3, which is characterized in that the oxidation modification biomass charcoal bag
Include: rice straw oxidation modification biomass carbon, corn stover oxidation modification biomass carbon, corncob oxidation modification biomass carbon,
Wood chip oxidation modification biomass carbon and oxidation modification active carbon.
5. the application of oxidation modification biomass carbon as claimed in claim 3.
6. applying described in claim 5 includes: that the oxidation modification biomass carbon is used for water body and heavy metal in soil and is had
The removal of machine pollutant.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111375380A (en) * | 2020-03-20 | 2020-07-07 | 东南大学 | Preparation and application of cotton straw-based modified hydrothermal carbon |
| CN111905691A (en) * | 2020-06-01 | 2020-11-10 | 农业部沼气科学研究所 | Rapid oxidation modification method of biomass charcoal, product and application thereof |
| CN115591530A (en) * | 2022-10-28 | 2023-01-13 | 农业部沼气科学研究所（Cn） | Method for preparing biomass charcoal material rich in carboxyl and phenolic hydroxyl and application |
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| JP2014015369A (en) * | 2012-07-11 | 2014-01-30 | Taiyo Nippon Sanso Corp | Production method of oxidation-resistant active carbon |
| CN104258809A (en) * | 2014-09-15 | 2015-01-07 | 河南农业大学 | Modified biomass charcoal and remediation method of heavy metal contaminated soil |
| CN107115843A (en) * | 2017-05-23 | 2017-09-01 | 江苏大学 | A kind of preparation method and applications for coming from peanut shell modified activated carbon |
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2019
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2014015369A (en) * | 2012-07-11 | 2014-01-30 | Taiyo Nippon Sanso Corp | Production method of oxidation-resistant active carbon |
| CN104258809A (en) * | 2014-09-15 | 2015-01-07 | 河南农业大学 | Modified biomass charcoal and remediation method of heavy metal contaminated soil |
| CN107115843A (en) * | 2017-05-23 | 2017-09-01 | 江苏大学 | A kind of preparation method and applications for coming from peanut shell modified activated carbon |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111375380A (en) * | 2020-03-20 | 2020-07-07 | 东南大学 | Preparation and application of cotton straw-based modified hydrothermal carbon |
| CN111905691A (en) * | 2020-06-01 | 2020-11-10 | 农业部沼气科学研究所 | Rapid oxidation modification method of biomass charcoal, product and application thereof |
| CN115591530A (en) * | 2022-10-28 | 2023-01-13 | 农业部沼气科学研究所（Cn） | Method for preparing biomass charcoal material rich in carboxyl and phenolic hydroxyl and application |
| CN115591530B (en) * | 2022-10-28 | 2024-05-03 | 农业部沼气科学研究所 | Method for preparing biomass charcoal material rich in carboxyl and phenolic hydroxyl groups and application of biomass charcoal material |
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