CN107175078A - A kind of sludge buckwheat base magnetic active carbon and preparation method thereof - Google Patents
A kind of sludge buckwheat base magnetic active carbon and preparation method thereof Download PDFInfo
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- CN107175078A CN107175078A CN201710602041.1A CN201710602041A CN107175078A CN 107175078 A CN107175078 A CN 107175078A CN 201710602041 A CN201710602041 A CN 201710602041A CN 107175078 A CN107175078 A CN 107175078A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28009—Magnetic properties
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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
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3214—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the method for obtaining this coating or impregnating
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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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
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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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
Abstract
The invention discloses a kind of sludge buckwheat base magnetic active carbon and preparation method thereof, comprise the following steps：Activated sludge is taken, is air-dried under field conditions (factors), while buckwheat wheat stalk is washed with deionized water only, slice is then cut into；Net buckwheat wheat stalk is washed with deionized water dries above-mentioned in an oven；Ground after activated sludge is air-dried, and by after the crushing of buckwheat wheat stalk, sludge and buckwheat wheat stalk are crossed into sub-sieve respectively；It will be mixed by the sludge and buckwheat wheat stalk of sub-sieve；Add maceration extract to soak at room temperature, then shaken in ultrasonic wave, then filtered, dried in an oven with miillpore filter；It is sealed in crucible, crucible is placed in Muffle furnace and carries out high-temperature calcination, carbide is taken out when waiting in-furnace temperature to be down to room temperature；Carbide is crushed and sieved, sludge buckwheat base magnetic active carbon is prepared.The present invention can reduce soak time, increase product yield and percent of decolourization using ultrasonic wave immersion activated sludge and buckwheat stalk.
Description
Technical field
The invention belongs to the preparing technical field of biological carbon materials, specifically, it is related to a kind of sludge buckwheat base magnetic and lives
Property charcoal and preparation method thereof.
Background technology
Sludge is one of Main By product of sewage treatment plant's discharge, due to containing substantial amounts of heavy metal, pathogen and difficulty
The materials such as the toxic organic compound of degraded, if directly discharge will cause serious secondary pollution to environment, from the resource of discarded object
Change angle to see, substantial amounts of thermally degradable organic matter is contained in sludge.Agricultural crop straw is used as a kind of life of reserves very abundant
Physical resources, it is most of to be all wasted in addition to minority is used as feed；In the past, most of peasant is directly outdoor
Burn, but this not only wastes the energy, goes back severe contamination air.Government prohibits the method for combustion by supervising these years, although so that combustion
The situation for burning stalk is controlled, but the agricultural crop straw being wasted still accounts for major part.Therefore, to agricultural crop straw
The research that multiple types are utilized becomes the focus of attention of people.
It is individually often thorough in the presence of being pyrolyzed during pyrolysis due to containing more ash content and less volatile matter in sludge,
The problems such as volatile matter is not easy to separate out.The composition such as biomass such as straw and stalk kind material fibrils element, hemicellulose and lignin,
With preferable pyrolysis characteristicses, research finds that sludge and stalk kind biomass copyrolysis have synergy.And buckwheat stalk with
Activated sludge is mixed and made into magnetic active carbon, can promote the environmentally friendly reusable edible of resource, can also promote other environmental protection causes
Development.
Activated carbon as adsorbent because with especially flourishing pore structure, be used for environmental protection cause, chemical industry etc.
Every field, as a kind of essential product；With economic development, especially in these years environmental improvement is gradually strengthened,
The tempting market of activated carbon, economic benefit gradually appear, and the research and development of activated carbon are promoted again.And sludge buckwheat base
Magnetic active carbon is that a kind of easy to make, adsorption rate is high, the extensive activated carbon of raw material, and charcoal-stripped compared with general
Energy is stronger, even more the first choice of activated carbon in future.
The content of the invention
In view of this, the invention provides a kind of sludge buckwheat base magnetic active carbon and preparation method thereof, the present invention is utilized
Sludge and agricultural wastes buckwheat wheat stalk is simple and quick efficiently prepares magnetic active carbon, is used as absorption Heavy Metals In Environment
The ecological restoration material of thing.
In order to solve the above-mentioned technical problem, the invention discloses a kind of preparation method of sludge buckwheat base magnetic active carbon,
Comprise the following steps：
Step 1, pre-treatment of raw material：Take sewage treatment plant to be rich in the activated sludge of organic matter, air-dry under field conditions (factors),
Local agricultural wastes buckwheat wheat stalk is washed with deionized water only simultaneously, then slice is cut into scissors；
Step 2, drying, crushing, screening：Net buckwheat wheat stalk dry for standby in an oven is washed with deionized water by above-mentioned；
Ground after activated sludge is air-dried, and by after the crushing of buckwheat wheat stalk, sludge and buckwheat wheat stalk are crossed into sub-sieve respectively；
Step 3, mixing：It will be mixed by the sludge and buckwheat wheat stalk of sub-sieve；
Step 4, concussion activation：Mixed sludge buckwheat wheat stalk mixture addition maceration extract is soaked at room temperature, then
Shaken, then filtered with miillpore filter in ultrasonic wave, dried in an oven, prepare the mixing of sludge tangerine bar
Thing；
Step 5, calcination charing：The sludge tangerine bar mixture that step 4 is prepared is sealed in crucible, and crucible is placed in
High-temperature calcination is carried out in Muffle furnace, carbide is taken out when waiting in-furnace temperature to be down to room temperature；
Step 6, crushing, screening：The carbide that step 5 is prepared is crushed, then is sieved with sub-sieve, system
It is standby to obtain sludge buckwheat base magnetic active carbon.
Further, the length of the slice in the step 1 is 3~5cm.
Further, the temperature of the baking oven in the step 2 is 100~110 DEG C；The grit number of sub-sieve is 80~100
Mesh.
Further, the mass ratio of the sludge of the process sub-sieve in the step 3 and buckwheat wheat stalk is 1:1~1:3.
Further, the maceration extract in the step 4 is ZnCl2With FeCl3Mixed solution, wherein, ZnCl2With FeCl3
Mass ratio be 2:1.
Further, the maceration extract in the step 4 is the FeCl that mass concentration is 50%3Solution.
Further, the soak time in the step 4 is 6~12h；The time shaken in ultrasonic wave is 0.5
~3h；The aperture of miillpore filter is 0.45 μm；The temperature of baking oven is 100~110 DEG C.
Further, the high-temperature calcination time in the step 5 is 0.5~2h, and high-temperature calcination temperature is 300~600 DEG C.
Further, the grit number of the sub-sieve in the step 6 is 80~100 mesh.
The invention also discloses a kind of sludge buckwheat base magnetic active carbon prepared by above-mentioned preparation method.
Compared with prior art, the present invention can be obtained including following technique effect：
1) the activated carbon yield for preparing of the present invention can reach 48.23%, and percent of decolourization can reach 94.34%, right
The adsorptivity of methyl orange is stronger, than general wood activated charcoal preferably, and this is carried for the comprehensive utilization of buckwheat stalk and activated sludge
A new method is supplied.
2) present invention can reduce soak time using ultrasonic wave immersion activated sludge and buckwheat stalk, and increase product is obtained
Rate and percent of decolourization.
Certainly, any product for implementing the present invention it is not absolutely required to while reaching all the above technique effect.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is influence of the different soak times of the invention to product yield and percent of decolourization；
Fig. 2 is influence of the ultrasound immersion of the invention to product yield and percent of decolourization；
Fig. 3 is that the present invention compares the percent of decolourization of methyl orange from preparing active carbon and commercially available activated carbon.
Embodiment
Describe embodiments of the present invention in detail below in conjunction with embodiment, thereby to the present invention how application technology hand
Section can fully understand and implement according to this to solve technical problem and reach the implementation process of technology effect.
The invention discloses a kind of preparation method of sludge buckwheat base magnetic active carbon, comprise the following steps：
Step 1, pre-treatment of raw material：Take sewage treatment plant to be rich in the activated sludge of organic matter, air-dry under field conditions (factors),
Local agricultural wastes buckwheat wheat stalk is washed with deionized water to the slice for being then cut into 3~5cm length with scissors only simultaneously；
Step 2, drying, crushing, screening：By the above-mentioned baking oven that net buckwheat wheat stalk is washed with deionized water at 100-110 DEG C
Middle dry for standby；Grind, and buckwheat wheat stalk is crushed after domestic sludge is air-dried, sludge and buckwheat wheat stalk are crossed 80 respectively~
The sub-sieve of 100 mesh；
Step 3, mixing：By by 80~100 mesh sub-sieves sludge and buckwheat wheat stalk according to mass ratio be 1:1~1:3
Ratio mixed；
Step 4, concussion activation：Mixed sludge buckwheat wheat stalk mixture addition maceration extract is soaked 6 at room temperature~
12h, maceration extract is ZnCl2With FeCl3Mixed solution or FeCl3Solution, ZnCl2With FeCl3Mass ratio be 2:1, it is described
FeCl3The mass concentration of solution is 50%, and 0.5~3h of concussion is carried out in ultrasonic wave, is then entered with 0.45 μm of miillpore filter
Row filtering, is dried in 100-110 DEG C of baking oven, is preserved；
Step 5, calcination charing：In the crucible that the sludge tangerine bar mixture prepared after above-mentioned activation is sealed in, by crucible
It is placed in Muffle furnace, by 300~600 DEG C of 0.5~2h of high-temperature calcination, carbide is taken out when waiting in-furnace temperature to be down to room temperature；
Step 6, crushing, screening：The carbide of above-mentioned preparation is crushed, then carried out with the sub-sieve of 80~100 mesh
Screening, prepares sludge buckwheat base magnetic active carbon.
Embodiment 1
Take sewage treatment plant to be rich in the activated sludge of organic matter, air-dry under field conditions (factors), while local agricultural is given up
The slice for being then cut into 3cm length with scissors only is washed with deionized water in gurry buckwheat wheat stalk；Net buckwheat is washed with deionized water by above-mentioned
Wheat stalk dry for standby in 110 DEG C of baking oven；Grind, and buckwheat wheat stalk crushed after domestic sludge is air-dried, by sludge and
Buckwheat wheat stalk crosses the sub-sieve of 80 mesh respectively；By the sludge after air-drying and buckwheat wheat stalk after crushed, the sludge of 90 mesh is chosen
It is 1 according to the mass ratio of sludge and buckwheat wheat stalk with buckwheat wheat stalk:2.5 are mixed, and add activator FeCl3Quality it is dense
Spend for 50%, 2h is impregnated under conditions of ultrasonic wave, is then filtered with 0.45 μm of miillpore filter, in 105 DEG C of baking oven
Middle drying, preserves, by the sludge buckwheat base carbon-type seal prepared after above-mentioned activation in 50ml crucible, crucible is placed in into Muffle furnace
In in 400 DEG C of high-temperature calcination 1h, take out carbide when waiting in-furnace temperature to be down to room temperature；The carbide of above-mentioned preparation is carried out
Crush, then sieved with the sub-sieve of 90 mesh, prepare sludge buckwheat base magnetic active carbon.
Embodiment 2
Take sewage treatment plant to be rich in the activated sludge of organic matter, air-dry under field conditions (factors), while local agricultural is given up
The slice for being then cut into 3cm length with scissors only is washed with deionized water in gurry buckwheat wheat stalk；Net buckwheat is washed with deionized water by above-mentioned
Wheat stalk dry for standby in 110 DEG C of baking oven；Grind, and buckwheat wheat stalk crushed after domestic sludge is air-dried, by sludge and
Buckwheat wheat stalk crosses the sub-sieve of 80 mesh respectively；By the sludge after air-drying and buckwheat wheat stalk after crushed, the sludge of 90 mesh is chosen
With buckwheat wheat stalk, the sludge and buckwheat wheat stalk (1 of different proportion are mixed:1、1:1.5、1:2、1:2.5、1:3) activator, is added
FeCl3Mass concentration be 50%, soak time is 12h, is then filtered with 0.45 μm of miillpore filter, at 105 DEG C
Dry, preserve in baking oven, in 400 DEG C of high-temperature calcination 1h in Muffle furnace, wait in-furnace temperature to take out charing when being down to room temperature
Thing；The carbide of above-mentioned preparation is crushed, then sieved with the sub-sieve of 80 mesh, sludge buckwheat base magnetic is prepared
Activated carbon, is adsorbed to methyl orange, and the mass mixing ratio found in sludge and buckwheat wheat stalk is 1：When 2.5, methyl is obtained
The percent of decolourization of orange is 90%, and the yield of product is 41.5%.
Embodiment 3
Take sewage treatment plant to be rich in the activated sludge of organic matter, air-dry under field conditions (factors), while local agricultural is given up
The slice for being then cut into 3cm length with scissors only is washed with deionized water in gurry buckwheat wheat stalk；Net buckwheat is washed with deionized water by above-mentioned
Wheat stalk dry for standby in 110 DEG C of baking oven；Grind, and buckwheat wheat stalk crushed after domestic sludge is air-dried, by sludge and
Buckwheat wheat stalk crosses the sub-sieve of 80 mesh respectively；By by 80 mesh sub-sieves sludge and buckwheat wheat stalk according to mass ratio be 1:1
Ratio is mixed；Mixed sludge buckwheat wheat stalk mixture addition maceration extract is soaked into 12h at room temperature, maceration extract is
ZnCl2With FeCl3Mixed solution, ZnCl2With FeCl3Mass ratio be 2:1, concussion 0.5h, Ran Houyong are carried out in ultrasonic wave
0.45 μm of miillpore filter is filtered, and is dried in 110 DEG C of baking oven, is preserved；By the sludge tangerine bar prepared after above-mentioned activation
In the crucible that mixture is sealed in, crucible is placed in Muffle furnace, by 300 DEG C of high-temperature calcination 2h, waits in-furnace temperature to be down to
Carbide is taken out during room temperature；The carbide of above-mentioned preparation is crushed, then sieved with the sub-sieve of 80 mesh, is prepared
Sludge buckwheat base magnetic active carbon, is adsorbed to methyl orange, and the percent of decolourization for obtaining methyl orange is 89%, and the yield of product is
42.5%.
Embodiment 3
Take sewage treatment plant to be rich in the activated sludge of organic matter, air-dry under field conditions (factors), while local agricultural is given up
The slice for being then cut into 5cm length with scissors only is washed with deionized water in gurry buckwheat wheat stalk；Net buckwheat is washed with deionized water by above-mentioned
Wheat stalk dry for standby in 100 DEG C of baking oven；Grind, and buckwheat wheat stalk crushed after domestic sludge is air-dried, by sludge and
Buckwheat wheat stalk crosses the sub-sieve of 100 mesh respectively；By by 100 mesh sub-sieves sludge and buckwheat wheat stalk according to mass ratio be 1:3
Ratio mixed；Mixed sludge buckwheat wheat stalk mixture addition maceration extract is soaked into 6h at room temperature, maceration extract is
ZnCl2With FeCl3Mixed solution, ZnCl2With FeCl3Mass ratio be 2:1, concussion 3h, Ran Houyong are carried out in ultrasonic wave
0.45 μm of miillpore filter is filtered, and is dried in 100 DEG C of baking oven, is preserved；By the sludge tangerine bar prepared after above-mentioned activation
In the crucible that mixture is sealed in, crucible is placed in Muffle furnace, by 600 DEG C of high-temperature calcination 0.5h, in-furnace temperature drop is waited
Carbide is taken out during to room temperature；The carbide of above-mentioned preparation is crushed, then sieved with the sub-sieve of 100 mesh, is prepared
Sludge buckwheat base magnetic active carbon is obtained, methyl orange is adsorbed, the percent of decolourization for obtaining methyl orange is 92%, the yield of product
For 38.6%.
Comparative example 1
Take sewage treatment plant to be rich in the activated sludge of organic matter, air-dry under field conditions (factors), while local agricultural is given up
The slice for being then cut into 3cm length with scissors only is washed with deionized water in gurry buckwheat wheat stalk；Net buckwheat is washed with deionized water by above-mentioned
Wheat stalk dry for standby in 110 DEG C of baking oven；Grind, and buckwheat wheat stalk crushed after domestic sludge is air-dried, by sludge and
Buckwheat wheat stalk crosses the sub-sieve of 90 mesh respectively；Mass ratio according to sludge and buckwheat wheat stalk is 1:2.5 are mixed, by above-mentioned work
Crucible is placed in Muffle furnace by the sludge buckwheat base carbon-type seal prepared after change in 50mL crucible, adds activator (dipping
Liquid) FeCl3Mass concentration be 50%, soak time is 12h, in 400 DEG C of high-temperature calcination 1h in Muffle furnace, wait stove in
Temperature takes out carbide when being down to room temperature；The carbide of above-mentioned preparation is crushed, then sieved with the sub-sieve of 90 mesh,
Sludge buckwheat base magnetic active carbon is prepared, methyl orange is adsorbed, the percent of decolourization for obtaining methyl orange is 90%, product
Yield is 41.5%.
The sludge buckwheat base magnetic active carbon that embodiment 1 is prepared, is adsorbed, the yield of product is to methyl orange
48.02%, percent of decolourization 94.21%, it can be seen that, embodiment is compared with comparative example 1, under the immersion condition of ultrasonic wave, dipping
Time can shorten, and the yield and percent of decolourization of product can all increase.
Illustrate the technique effect of the present invention with reference to specific experimental data：
Because the processing cost of activated sludge is increased, experiment adds common buckwheat stem and leaf with 10g activated sludge as quantitative
Stalk, obtained activated carbon is adsorbed to 25mL concentration 10mg/L methyl orange, by the filtrate after adsorption filtration at 284nm
Tested with spectrophotometer, the percent of decolourization of magnetic active carbon is calculated according to the surplus ratio of colourity, so as to know absorption property.Adopt
Optimal parameter is drawn with experiment of single factor.The measure side of methyl orange can be obtained according to national standard GB/T 12496.10-1999
Method, obtains ratio defective product and percent of decolourization calculation formula:
The surplus ratio (%) of percent of decolourization (%)=1- colourities. (3)
In above formula, m0：The gross mass of activated sludge and buckwheat stalk, m1 before charing：The quality of the magnetic active carbon of generation,
C0：The initial concentration of methyl orange solution, C：The concentration of methyl orange, A0 after reaction：The initial extinction of methyl orange
Degree, A：The absorbance of methyl orange after reaction.
First, influence of the soak time to properties of product
The present invention has probed into influence of the time variable to product yield and percent of decolourization.At room temperature immersion 4,8,12,16,20,
24h, only changes the time of immersion, other are carried out according to optimized parameter, and the result drawn is shown in Fig. 1.
From fig. 1, it can be seen that when other Variable Conditions are all identical, yield and percent of decolourization the prolonging with the time of immersion of product
It is long to increase, soak after 12h, the yield of product is 41.5%, and percent of decolourization is 90%, the product yield that continues and percent of decolourization
Do not increase significantly.
2nd, lower influence of the immersion to properties of product of ultrasound
Soak time can produce influence to properties of product really, consider further that under ultrasonic soaking conditionses, other conditions are not
Change, the result drawn is shown in Fig. 2.
By the comparison to Fig. 1 and Fig. 2, it can be seen that ultrasound immersion can shorten the time of immersion really, soak
After 120min, the yield of product is 48.02%, and percent of decolourization 94.21% has increased compared with common immersion.It can thus be concluded that, surpass
Sound wave condition can improve the yield and percent of decolourization of product really.
3rd, contrasted from preparing active carbon and commercially available charcoal absorption performance
Self-control magnetic active carbon and each 10.00g of commercially available wood activated charcoal are weighed, the conical flask for pouring two 50mL into is worked as
In, then the 25mg/L configured methyl orange solution is poured into, mixing shakes up absorption and refiltered for a period of time, and filtrate is carried out survey suction
Luminosity, so as to try to achieve percent of decolourization, the above-mentioned experiment of repetition four times obtains Fig. 3.
From the figure 3, it may be seen that in the experiment to Adsorption of Methyl Orange, from preparing active carbon to the adsorption rate of methyl orange always than commercially available
Wood activated charcoal is high, has met the secondary standard of the activated carbon of purification of water quality, has possessed stronger absorption property；Homemade magnetic
Activated carbon has some superiority compared with general activated carbon on the market on absorption property.
It is because self-control magnetic that self-control magnetic active carbon and commercially available general wood activated charcoal are had any different in terms of decoloration performance
The surface of activated carbon is uneven, and has very abundant cellular porosity and has magnetic, and commercially available general business charcoal
Structure distribution is fine and closely woven uniform and with less hole, without magnetic.
Some preferred embodiments of invention have shown and described in described above, but as previously described, it should be understood that invention is not
Form disclosed herein is confined to, the exclusion to other embodiment is not to be taken as, and available for various other combinations, modification
And environment, and can be carried out in invention contemplated scope described herein by the technology or knowledge of above-mentioned teaching or association area
Change., then all should be in the appended power of invention and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of invention
In the protection domain that profit is required.
Claims (10)
1. a kind of preparation method of sludge buckwheat base magnetic active carbon, it is characterised in that comprise the following steps：
Step 1, pre-treatment of raw material：Take sewage treatment plant to be rich in the activated sludge of organic matter, air-dry under field conditions (factors), simultaneously
Local agricultural wastes buckwheat wheat stalk is washed with deionized water only, then slice is cut into scissors；
Step 2, drying, crushing, screening：Net buckwheat wheat stalk dry for standby in an oven is washed with deionized water by above-mentioned；Will be living
Property sludge air drying after grind, and after buckwheat wheat stalk is crushed, sludge and buckwheat wheat stalk are crossed into sub-sieve respectively；
Step 3, mixing：It will be mixed by the sludge and buckwheat wheat stalk of sub-sieve；
Step 4, concussion activation：Mixed sludge buckwheat wheat stalk mixture addition maceration extract is soaked at room temperature, then super
Shaken, then filtered with miillpore filter in sound wave, dried in an oven, prepare sludge tangerine bar mixture；
Step 5, calcination charing：The sludge tangerine bar mixture that step 4 is prepared is sealed in crucible, and crucible is placed in into Muffle
High-temperature calcination is carried out in stove, carbide is taken out when waiting in-furnace temperature to be down to room temperature；
Step 6, crushing, screening：The carbide that step 5 is prepared is crushed, then is sieved with sub-sieve, is prepared into
To sludge buckwheat base magnetic active carbon.
2. preparation method according to claim 1, it is characterised in that the length of the slice in the step 1 is 3~5cm.
3. preparation method according to claim 1, it is characterised in that the temperature of the baking oven in the step 2 is 100~
110℃；The grit number of sub-sieve is 80~100 mesh.
4. preparation method according to claim 1, it is characterised in that the sludge of the process sub-sieve in the step 3 and
The mass ratio of buckwheat wheat stalk is 1:1~1:3.
5. preparation method according to claim 1, it is characterised in that the maceration extract in the step 4 is ZnCl2With FeCl3
Mixed solution, wherein, ZnCl2With FeCl3Mass ratio be 2:1.
6. preparation method according to claim 1, it is characterised in that the maceration extract in the step 4 is that mass concentration is
50% FeCl3Solution.
7. preparation method according to claim 1, it is characterised in that the soak time in the step 4 is 6~12h；
The time shaken in ultrasonic wave is 0.5~3h；The aperture of miillpore filter is 0.45 μm；The temperature of baking oven is 100~110
℃。
8. preparation method according to claim 1, it is characterised in that high-temperature calcination time in the step 5 for 0.5~
2h, high-temperature calcination temperature is 300~600 DEG C.
9. preparation method according to claim 1, it is characterised in that the grit number of the sub-sieve in the step 6 is 80
~100 mesh.
10. the sludge buckwheat base magnetic that the preparation method in a kind of 1-9 as claim described in any claim is prepared
Activated carbon.
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| CN201710602041.1A CN107175078A (en) | 2017-07-21 | 2017-07-21 | A kind of sludge buckwheat base magnetic active carbon and preparation method thereof |
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| CN201710602041.1A CN107175078A (en) | 2017-07-21 | 2017-07-21 | A kind of sludge buckwheat base magnetic active carbon and preparation method thereof |
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| CN110577219A (en) * | 2019-09-29 | 2019-12-17 | 南京工程学院 | Magnetic sludge straw-based activated carbon and preparation method thereof |
| CN113634229A (en) * | 2021-09-02 | 2021-11-12 | 浙江理工大学绍兴柯桥研究院有限公司 | Preparation method and application of biochar with selective adsorption-desorption capacity |
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