CN110252243A - Walnut shell-based biochar as well as preparation method and application thereof - Google Patents
Walnut shell-based biochar as well as preparation method and application thereof Download PDFInfo
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- CN110252243A CN110252243A CN201910481691.4A CN201910481691A CN110252243A CN 110252243 A CN110252243 A CN 110252243A CN 201910481691 A CN201910481691 A CN 201910481691A CN 110252243 A CN110252243 A CN 110252243A
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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
- B01J20/02—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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- 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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
-
- 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
Abstract
The invention discloses walnut shell-based biochar and a preparation method and application thereof. Drying, crushing, ball-milling and sieving the walnut shells to obtain walnut shell powder, and performing pyrolysis treatment on the walnut shell powder in a protective atmosphere to obtain walnut shell-based biochar; the walnut shell-based biochar is used as an adsorbing material to be applied to adsorption and removal of copper ions and lead ions in a complex heavy metal solution system, shows high competitive adsorption capacity on the copper ions and the lead ions, and can realize separation of the copper ions and the lead ions from metal ions such as zinc ions and cadmium ions.
Description
Technical field
The present invention relates to a kind of heavy-metal adsorption material, in particular to a kind of walnut shell base biology using walnut shell preparation
Carbon Materials, further relate to walnut shell base charcoal as adsorbent material to contents of many kinds of heavy metal ion coexist in solution lead ion and copper from
The application method of sub- selectively removing, belongs to solid waste resource utilization and field of environmental improvement.
Background technique
With the rapid development of industry and social economy, the yield and type of heavy metal polluted waste water are constantly increasing.
The industries such as mining, metallurgy, plating, medicine, agricultural generate and the stain disease discharged usually contains the various heavies such as cadmium, lead, copper.
These heavy metal containing wastewater treatments are not up to standard, are emitted into water body nearby, can not only pollute receiving water body, and can contaminated soil, lead
Crops are caused, microorganism is by heavy metallic poison, and these heavy metal accumulations, extraction separation in waste water are difficult, it is difficult to by again
It utilizes.Heavy metal is difficult to natural degradation in the environment, and has enrichment effect, therefore has very big shadow for animals and plants
It rings.Shortage of water resources problems demand caused by heavy metal pollution water resource solves.
The nutritive value of a kind of nut of the walnut as high nutritive value, kernel has obtained the abundant affirmation of people, and
A large amount of walnut shell is directly burnt as a kind of waste, and only small part walnut shell is by broken, screening, the works such as polishing
Skill is fabricated to graininess polishing material, for the filter in sewage treatment or discharge water process or as pearl jewellery, electronics
The polishing material of part, glasses accessory etc..The significant wastage and great environmental problem of resource are caused in this way.
Charcoal is generated in protective gas atmosphere by high temperature pyrolysis using biomass as raw material, has huge ratio
Surface area and pore structure, the heavy metal in adsorbable pollutant effluents, the multiple pollutants such as organic matter and inorganic matter.But for
The biomass carbon of lead, copper, has not been reported in the property of can choose enrichment, removing heavy metal wastewater thereby.
Summary of the invention
In view of the problems of the existing technology, the first purpose of this invention is to be to provide a kind of to utilize agricultural wastes
The method that walnut shell prepares high added value walnut shell base charcoal as inexpensive raw material, the method achieve agricultural wastes
Resource utilization, it is at low cost, process is short, easy to operate, be conducive to industrialized production.
Second object of the present invention be to provide it is a kind of under proper condition to copper in complicated heavy metal solution system
Ion and lead ion have the walnut shell base charcoal of stronger competitive Adsorption, can be used in complicated heavy metal solution lead ion and
The removing or enrichment of copper ion.
Third object of the present invention is to be to provide the application of walnut shell base charcoal, as adsorbent material application
The Adsorption of copper ion and lead ion in complicated heavy metal solution system, walnut shell base charcoal is to copper ion and lead ion
Higher competitive Adsorption ability is shown, copper ion and lead ion and zinc ion and cadmium ion etc. is can be realized and separates.
In order to achieve the above technical purposes, the present invention provides a kind of preparation method of walnut shell base charcoal, this method
It is that walnut shell is obtained walnut shell powder, walnut shell powder is placed in protection atmosphere by drying, broken, ball milling and sieving processing
Lower progress pyrolysis processing to get.
Preferred scheme, the ball milling condition: revolving speed is 2000~6000r/min, and the time is 20~80min.Preferably
Revolving speed is 3000~5000r/min.The preferred time is 50~70min.
Preferred scheme, the sieving use 200 mesh screens, take the lower walnut shell powder of sieve.
Preferred scheme, the condition of the pyrolysis processing are as follows: with 1~10 DEG C of min-1Heating rate is warming up to 600~700
DEG C, keep the temperature 30~90min.Preferred heating rate is 3~8 DEG C of min-1。
The present invention also provides a kind of walnut shell base charcoals, are obtained by preparation method.
The present invention also provides a kind of applications of walnut shell base charcoal, are applied to complicated heavy metal as adsorbent material
The Adsorption of copper ion and lead ion in solution system.
Preferred scheme, the complexity heavy metal solution system include at least one of cadmium ion and zinc ion and copper from
At least one of son and lead ion.
Preferred scheme, concentration of cadmium ions is 100mg/L~150mg/L in the complexity heavy metal solution system, zinc from
Sub- concentration is 100mg/L~150mg/L, and copper ion concentration is 100mg/L~150mg/L, the concentration of lead ion be 100mg/L~
150mg/L；Addition concentration of the walnut shell base charcoal in complicated heavy metal solution system is 0.5~1g/L.The core
Peach shell base charcoal optimal addition concentration in complicated heavy metal solution system is 0.75~1g/L.
The pH of preferred scheme, the complexity heavy metal solution system is 2.5~6.
Preferred scheme, Adsorption time are greater than 5min, are more preferably 200min or more.
Complicated heavy metal solution system of the invention can be heavy metal wastewater thereby common in the art, including and not only
Be limited to: discharged in contaminated by heavy metals natural water (such as lake, river and underground water), industrial processes containing weight
The waste water of metal ion and the leachate of heavy-metal contaminated soil or leacheate etc..
Walnut shell of the invention is common walnut shell or leatheroid walnut shell.
Protective atmosphere of the invention can be that nitrogen is perhaps inert atmosphere or for two kinds of mixing.Inert atmosphere is such as
Argon gas.
The preparation method of walnut shell base charcoal of the invention, comprising the following specific steps
1) walnut shell pre-processes:
Walnut shell is put into baking oven, setting oven temperature is 90~110 DEG C, 4~8h of drying and processing；Take out drying sample
Product are smashed to pieces using agate mortar, obtain walnut shell crushed particles；Walnut shell crushed particles are put into planetary ball mill, are adjusted
Section revolving speed is 2000~6000r/min, rotates 20~80min, grinds walnut shell particle sufficiently, obtain powdered walnut shell
Powder raw material；Gained walnut husk as raw material powder is crossed into 200 mesh (0.075mm) sieve, sieved walnut shell powder is collected, is put into baking oven,
It is 90~110 DEG C that oven temperature, which is arranged, dries 4~8h.
2) prepared by walnut shell base charcoal:
The walnut shell powder for taking out drying, is put into rectangle silica crucible, crucible is covered lid, be put into tubular type atmosphere furnace
In glass tube, by two sides ferrule it is good after, be passed through argon gas (Ar), under argon atmosphere carry out biomass pyrolytic processing, setting
Heating rate is 1~10 DEG C of min-1, preferably 3~8 DEG C of min-1, it is warming up to target temperature 700 respectively by 25 DEG C of room temperature
DEG C, 30~90min is then kept, is down to room temperature after pyrolysis again.
The adsorption process of walnut shell base charcoal of the invention for heavy metal ion in heavy metal wastewater thereby:
Main use contains Cu2+、Pb2+、Cd2+、Zn2+A single huge sum of money or mixture-metal solution are useless to simulate complicated heavy metal
Water.Using dust technology and sodium hydroxide adjusting sample pH value, the walnut shell base for adding certain mass after regulating into sample is raw
Object charcoal.It is put into constant temperature water bath oscillator, sets certain revolving speed and temperature, it is continuous to shake for 24 hours, after concussion, using pumping
The method separation solid and liquid of filter.A small amount of liquid is taken to be detected.Heavy metal ion Cu in solution2+、Pb2+、Cd2+、Zn2+'s
Detection method (GB/T7475-1987) according to national standards is measured, using in atomic absorption spectrophotometry measurement solution
The concentration of four heavy metal species ions.Calculate the removal rate and adsorbance of four heavy metal species ions.
Compared with the prior art, technical solution of the present invention bring advantageous effects:
The present invention prepares walnut shell based biomass raw material of wood-charcoal using agricultural wastes walnut shell as raw material, by high temperature pyrolysis
On the one hand on the other hand material can use walnut shell based biomass charcoal with resource utilization agricultural wastes to adsorb and rich
Collect the poisonous and harmful heavy metallic substance in waste water, achievees the purpose that " treatment of wastes with processes of wastes against one another ".
The present invention prepares high added value walnut shell base charcoal as inexpensive raw material using agricultural wastes walnut shell,
Resource utilization degree is high, and it is at low cost, process is short, easy to operate, be conducive to industrialized production.
Walnut shell base charcoal of the invention is to simultaneously containing the complicated heavy metal such as lead ion, cadmium ion, copper ion, zinc ion
Lead ion and copper ion in solution system have stronger competitive Adsorption, by the relative usage, that is, pH etc. for controlling biomass carbon
The adsorbing separation of lead ion and copper ion and other heavy metal ion may be implemented in condition.
Walnut shell base charcoal of the invention is good to the absorption property of heavy metal ion, and fixed effect is preferable, is adsorbed
Heavy metal ion on walnut shell base biological carbon materials is not easily disconnected from, and processing is more thorough, can be widely applied to heavy metal-polluted
Contaminate the processing of solution.
Detailed description of the invention
Fig. 1 is scanning electron microscope (SEM) image of walnut shell base charcoal of the present invention；
Fig. 2 be walnut shell base charcoal difference dosage of the present invention absorption with concentration heavy metal solion single (left side) and
Mix race condition (right side) removal rate figure；
Fig. 3 is to adsorb with concentration heavy metal solion single (left side) and mix under charcoal of the present invention absorption condition of different pH
Close race condition (right side) removal rate figure.
Fig. 4 be charcoal of the present invention adsorb adsorb under different temperatures environment with concentration heavy metal solion single (left side) and
Mix race condition (right side) removal rate figure.
Fig. 5 is to adsorb under charcoal of the present invention absorption different time with concentration heavy metal solion single (left side) and mixing
Race condition (right side) removal rate figure.
Specific embodiment
Following embodiment is intended to further illustrate the content of present invention, rather than limits the protection model of the claims in the present invention
It encloses.
Copper ion solution in following Examples uses Gerhardite Cu (NO3)2·3H2O preparation.Lead ion solution is adopted
With plumbi nitras Pb (NO3)2Preparation, zinc ion solution and cadmium-ion solution can equally be prepared using nitrate.With copper ion solution
Be illustrated with for lead ion solution: the preparation method of copper ion solution: weighing 3.78g Gerhardite, is added a small amount of
Deionized water is stirred to being completely dissolved, and is transferred in 1000ml volumetric flask, and it is 1gL that constant volume, which obtains concentration,-1Copper ion solution make
For copper ion stock solution；The preparation method of lead ion solution: weighing the plumbi nitras of 1.6g, and a small amount of deionized water is added and stirs to complete
Fully dissolved is transferred in 1000ml volumetric flask, and it is 1gL that constant volume, which obtains concentration,-1Lead ion solution as lead ion stock solution.It adopts
With dust technology and sodium hydrate regulator solution pH.
Embodiment 1
Walnut shell charcoal preparation method, specific steps are as follows:
(1) walnut shell pre-processes
Walnut shell is put into baking oven, setting oven temperature is 105 DEG C, drying and processing 6h.Drying sample is taken out, Ma is used
Nao mortar is smashed to pieces, and walnut shell crushed particles are obtained.All walnut shell crushed particles are put into planetary ball mill.It adjusts and turns
Speed is 4000r/min, rotates 60min, grinds walnut shell particle sufficiently, obtain powdered walnut shell powder biomass material.
Obtained walnut shell powder is crossed into 200 mesh (0.075mm) sieve, sieved walnut shell is collected, is put into baking oven, oven temperature is set
It is 105 DEG C, dries 6h.
(2) prepared by walnut shell charcoal
The walnut shell powder for taking out drying, is put into rectangle silica crucible, crucible is covered lid, be put into tubular type atmosphere furnace
In glass tube, by two sides ferrule it is good after, be passed through argon gas (Ar), under argon atmosphere carry out biomass pyrolytic processing.Setting
Heating rate is 5 DEG C of min-1, it is warming up to 700 DEG C respectively by 25 DEG C of room temperature, keeps 60min.It is down to again after pyrolysis
Room temperature.
Using walnut shell charcoal as removal copper ion, lead ion, cadmium ion and zinc ion single and competitive adsorbate,
Four heavy metal species ion stock solutions are taken to be diluted to single respectively and be used in mixed way liquid, two kinds of each concentration of heavy metal ion of solution are complete
Portion is 150mg/L, and pH is adjusted to 5, is poured into 50mL plastic centrifuge tube.Every part of solution is separately added into 0.1g, 0.25g, 0.5g,
The above-mentioned adsorbent material of 0.75g, 1.0g, is put into water-bath constant temperature oscillator, setting concussion rate 250r/min, at 25 DEG C of room temperature
Concussion for 24 hours, is filtered after taking-up using filter paper, and aas determination concentration is utilized after taking supernatant to dilute.As shown in Fig. 2, four
Heavy metal species ion is raised trend with the increase of walnut shell charcoal dosage, but four heavy metal species ions increase
Speed is not identical.In four heavy metal species ions, fastest-rising is Pb2+, followed by Cu2+, and Cd2+And Zn2+Increase slower.
By competitive Adsorption figure it is found that when dosage is 0.1g, the adsorbance and removal rate of four heavy metal species ions are Zn2+
>Cu2+>Pb2+>Cd2+；When dosage is 0.25g, the adsorbance and removal rate of four heavy metal species ions are Zn2+>Pb2+>Cu2+>
Cd2+；When dosage is 0.5g, the adsorbance and removal rate of four heavy metal species ions are Pb2+>Cu2+>Zn2+>Cd2+；When adding
When amount is 0.75g, the adsorbance and removal rate of four heavy metal species ions are Pb2+>Cu2+> > Zn2+>Cd2+；When dosage is
When 1.0g, the adsorbance and removal rate of four heavy metal species ions are Cu2+>Pb2+> > Zn2+>Cd2+.It can be seen that dosage for
Competitive Adsorption is affected.With the increase of dosage, Pb2+And Cu2+Gradually it is on a good wicket, Zn2+And Cd2+Gradually it is in
Minus advantage.And Cu2+And Pb2+Between be also clearly present competition, final Cu2+Adsorption effect be better than Pb2+。
When becoming mixed system from unitary system, when dosage is less, Pb2+Become least favorable suction from most favorably adsorbing
It is attached, Cu2+Become favorably adsorbing from least favorable absorption.Zn2+And Cd2+In the position favorably adsorbed；As dosage gradually becomes
Greatly, Pb2+The position favorably adsorbed, Cu are gradually occupied again2+Continue to keep favorably to adsorb, and Zn2+And Cd2+Gradually it is in unfavorable suction
Attached position.It can be seen that the competitive Adsorption effect of four heavy metal species is very fierce, the increase of dosage is conducive to Cu2+And Pb2+
Absorption, be unfavorable for Cd2+And Zn2+Absorption.
Embodiment 2
Walnut shell biomass carbon prepared by embodiment 1 is as the list of removal copper ion, lead ion, cadmium ion and zinc ion
One and competitive adsorbate, take four heavy metal species stock solutions to be diluted to single respectively and be used in mixed way liquid, two kinds of each huge sum of moneys of solution
Belong to all 150mg/L of ion concentration, pH is adjusted to 2,3,4,5,6 respectively.It pours into 50mL plastic centrifuge tube.Every part of solution is equal
The above-mentioned adsorbent material of 0.5g is added, is put into water-bath constant temperature oscillator, setting concussion rate 250r/min shakes at 25 DEG C of room temperature
It swings for 24 hours, is filtered after taking-up using filter paper, aas determination concentration is utilized after taking supernatant to dilute.As shown in figure 3, in list
One and mixed system in, charcoal is totally raised trend to the adsorption effect of four heavy metal species.The difference is that mixing
In system, Pb has reached optimal adsorption effect in the case where pH is 3.
In unitary system, four heavy metal species increase with pH, and removal rate and adsorbance are the trend being gradually increasing.It is overall
From, adsorption effect Pb2+>Cd2+>Zn2+>Cu2+。
By competitive Adsorption result figure it is found that the adsorption effect of four heavy metal species is very poor, and reason may be when pH is 2
Due to containing a large amount of H in solution under the acidic environment of pole+, and H+Presence can be led with four heavy metal species competitive Adsorption site simultaneously
Heavy metal ion is caused to be not easy to be combined absorption with biological carbon adsorbent, therefore adsorption effect is very poor.And with the increase of pH, weight
The adsorption effect of metal also gradually improves, wherein Pb2+Reach optimal adsorption effect when pH is 3, it may be possible under this pH environment,
Due to the presence of other heavy metal ion, Pb is promoted2+Absorption.And other heavy metals be adsorbance and removal rate gradually on
It rises.But no matter under which kind of pH, adsorption effect is Pb2+>Cu2+>Zn2+>Cd2+。
When solution system becomes mixed system from unitary system, Cu2+Adsorption effect occur significant change, by unfavorable suction
It is attached to become favorably adsorbing, illustrate that pH will affect Cu2+Adsorption effect, Cu2+There is powerful competitiveness in mixed system.
Embodiment 3
Walnut shell biomass carbon prepared by embodiment 1 is as the list of removal copper ion, lead ion, cadmium ion and zinc ion
One and competitive adsorbate, take four heavy metal species ion stock solutions to be diluted to single respectively and be used in mixed way liquid, two kinds of solution are each
Concentration of heavy metal ion all 150mg/L, pH are adjusted to 5 respectively.It pours into 50mL plastic centrifuge tube.Every part of solution is added
The above-mentioned adsorbent material of 0.5g, is put into water-bath constant temperature oscillator, setting concussion rate 250r/min, 15 DEG C of difference, and 25 DEG C, 35
DEG C, it shakes at 45 DEG C for 24 hours, is filtered after taking-up using filter paper, aas determination concentration is utilized after taking supernatant to dilute.
As shown in Figure 4, as temperature increases, the changing rule of four heavy metal species ions is not quite similar.
When in single adsorption system, the adsorbance and removal rate of four heavy metal species ions are ordered as Pb2+>Cd2+≈
Zn2+>Cu2+, in 25~35 DEG C of sections, Cd2+Adsorption effect ratio Zn2+It is good, but other two temperature Zn2+Adsorption effect it is equal
Better than Cd2+。
When in mixing and absorption system, the adsorption effect of four heavy metal species ions is changed, and Pb is ordered as2+>
Cu2+>Zn2+>Cd2+, when illustrating in the environment in mixing competition, Cu2+Competitiveness it is stronger, and Cd2+Adsorption capacity quilt
Weaken, therefore in keen competition absorption environment, Pb2+And Cu2+Occupy main advantage, and Cd2+And Zn2+It is in a disadvantageous position.
Embodiment 4
Walnut shell biomass carbon prepared by embodiment 1 is the single of removal copper ion, lead ion, cadmium ion or zinc ion
And competitive adsorbate, take four heavy metal species ion stock solutions to be diluted to single respectively and be used in mixed way liquid, two kinds of solution are each heavy
Concentration of metal ions all 150mg/L, pH are adjusted to 5 respectively.It pours into 50mL plastic centrifuge tube.Every part of solution is added
The above-mentioned adsorbent material of 0.5g, is put into water-bath constant temperature oscillator, and setting concussion rate 250r/min, in 25 DEG C, lower concussion is being shaken
Swing 5min, 10min, 20min, 40min, 60min, 120min, 240min, 360min, 720min, when 1440min takes out, then
It is filtered afterwards with filter paper, measures concentration after taking supernatant to dilute.
By Fig. 5 unitary system absorption and mixed system competitive Adsorption figure it is found that unitary system adsorb when, four heavy metal species from
The removal rate rate of rise of son and the removal rate for being finally reached dynamic equilibrium are all different.Wherein rate of rise is ordered as Cd2+>
Cu2+>Pb2+>Zn2+, and removal rate is ordered as Pb when being finally reached adsorption equilibrium2+>Cd2+>Zn2+>Cu2+。
When in competitive Adsorption in mixed system, the competitive Adsorption effect of four heavy metal species ions is Pb2+>Cu2+>Zn2+
>Cd2+.Within a short period of time, the competition of four heavy metal species ions is very fierce, and adsorption equilibrium is almost reached in 200min.
Compared with when unitary system, the time that four heavy metal species ions reach adsorption equilibrium shortens, and is inhaled since adsorbent mass is certain
Adsorption site provided by attached dose is limited, and four heavy metal species ions compete in conjunction with adsorption site, therefore can quickly reach
To adsorption equilibrium, removal rate when corresponding four heavy metal species ion reaches adsorption equilibrium reduces.And Cu2+In competitive Adsorption
It has been more than Cd2+And Zn2+, status of having the advantage, Cd2+Not as good as Cu in competitive Adsorption2+And Zn2+, it is on a sticky wicket.
Claims (9)
1. a kind of preparation method of walnut shell base charcoal, it is characterised in that: by walnut shell by drying, broken, ball milling and mistake
Sieve processing, obtain walnut shell powder, by walnut shell powder be placed in protection atmosphere under carry out pyrolysis processing to get.
2. a kind of preparation method of walnut shell base charcoal according to claim 1, it is characterised in that: the ball milling item
Part: revolving speed is 2000~6000r/min, and the time is 20~80min.
3. a kind of preparation method of walnut shell base charcoal according to claim 1, it is characterised in that: the sieving uses
200 mesh screens take the lower walnut shell powder of sieve.
4. the preparation method of described in any item a kind of walnut shell base charcoals according to claim 1~3, it is characterised in that: institute
State the condition of pyrolysis processing are as follows: with 1~10 DEG C of min-1Heating rate is warming up to 600~700 DEG C, keeps the temperature 30~90min.
5. a kind of walnut shell base charcoal, it is characterised in that: obtained by any one of Claims 1 to 4 preparation method.
6. a kind of application of walnut shell base charcoal described in claim 5, it is characterised in that: be applied to as adsorbent material multiple
The Adsorption of copper ion and lead ion in miscellaneous heavy metal solution system.
7. a kind of application of walnut shell base charcoal according to claim 6, it is characterised in that: the complexity heavy metal is molten
Liquid system includes at least one of cadmium ion and zinc ion and at least one of copper ion and lead ion.
8. a kind of application of walnut shell base charcoal according to claim 6 or 7, it is characterised in that: the complicated huge sum of money
Belonging to concentration of cadmium ions in solution system is 100mg/L~150mg/L, and zinc ion concentration is 100mg/L~150mg/L, copper ion
Concentration is 100mg/L~150mg/L, and the concentration of lead ion is 100mg/L~150mg/L；The walnut shell base charcoal is multiple
Addition concentration in miscellaneous heavy metal solution system is 0.5~1g/L.
9. a kind of application of walnut shell base charcoal according to claim 6 or 7, it is characterised in that: the complicated huge sum of money
The pH for belonging to solution system is 2.5~6.
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| CN111054311A (en) * | 2020-01-07 | 2020-04-24 | 扬州工业职业技术学院 | Preparation method of dolomite and malic acid modified walnut skin filter material biochar and application of biochar in sewage treatment |
| CN113336327A (en) * | 2021-04-13 | 2021-09-03 | 西安建筑科技大学 | Synergism method of anaerobic membrane bioreactor based on biochar addition |
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| DANIEL A. BAIR等: "Sorption of Pharmaceuticals, Heavy Metals, and Herbicides to Biochar in the Presence of Biosolids", 《JOURNAL OF ENVIRONMENTAL QUALITY》 * |
| 刘剑楠等: "牛粪和核桃壳生物炭对水溶液中Cd2+和Zn2+的吸附研究", 《农业环境科学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110102261A (en) * | 2019-05-24 | 2019-08-09 | 长沙矿冶研究院有限责任公司 | A kind of preparation method and application of lead arsenic cadmium adsorbent material |
| CN111054311A (en) * | 2020-01-07 | 2020-04-24 | 扬州工业职业技术学院 | Preparation method of dolomite and malic acid modified walnut skin filter material biochar and application of biochar in sewage treatment |
| CN113336327A (en) * | 2021-04-13 | 2021-09-03 | 西安建筑科技大学 | Synergism method of anaerobic membrane bioreactor based on biochar addition |
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Application publication date: 20190920 |