CN106902762A - A kind of preparation and application of magnetic aerobic particle mud graphene oxide multi-walled carbon nano-tubes compound adsorbent - Google Patents
A kind of preparation and application of magnetic aerobic particle mud graphene oxide multi-walled carbon nano-tubes compound adsorbent Download PDFInfo
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- 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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Abstract
The present invention relates to a kind of preparation and application of magnetic aerobic particle mud graphene oxide multi-walled carbon nano-tubes compound adsorbent.The present invention is first by aerobic particle mud, Fe3O4, graphene oxide and multi-walled carbon nano-tubes are compound is prepared for magnetic aerobic particle mud graphene oxide multi-walled carbon nano-tubes compound adsorbent.The introducing of aerobic particle mud increased the adsorption site of adsorbent, with reference to graphene oxide specific surface area is big, multi-walled carbon nano-tubes is abundant surface functional group and the Magneto separate advantage of ferroso-ferric oxide, so as to obtain preparation process is simple, with low cost, adsorption capacity is high, be easily isolated, repeat the biological adsorption agent for utilizing and not causing secondary pollution.The composite can effectively process waste water from dyestuff.
Description
Technical field
The present invention relates to a kind of system of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent
Standby and application, it is adaptable to the removal of the dye of positive ion, belongs to composite and prepares and technical field of sewage.
Background technology
In recent years, industrialized fast development has triggered a lot of problem of environmental pollutions, along with serious pollution of waterhead, plus
The acute shortage of water resource.Wherein, the waste water that dyeing is produced has that discharge capacity is big, contaminative strong and the spy of difficult for biological degradation
Point.Current dyeing waste water just develops towards anti-light solution, anti-oxidant, antibiont degraded direction so that these dyeing waste waters are more next
More it is difficult to be processed with general water treatment system.Waste water from dyestuff is discharged into environment water, can reduce the transparency of water body, largely
Oxygen in consumption water, causes water hypoxia, influences aquatile and growth of microorganism, destroys the self-purification of water, and with certain
Bio-toxicity.Therefore, develop efficient, quick water dye administering method, solve water resources crisis have become one it is very heavy
Want and urgent task.
Aerobic particle mud is the granulated activated sludge sludge formed by microorganism self-cohesion action.With active
Sludge compared to have be not susceptible to sludge bulking, settling property is good, capacity of resisting impact load is strong, anti-poisonous and harmful substance invade and harass,
Volumetric loading rate is high, the energy-conservation that saves land the features such as.Aerobic particle mud has specific surface area higher and abundant functional group, has very
Strong adsorption capacity, the removal effect to dyestuff is obvious, simple to operate.Therefore the pollution gone in water removal using aerobic particle mud
Thing, all has good application prospect in terms of efficiency and recycling.Graphene oxide is powdered graphite through chemical oxidation
Product afterwards, it and multi-walled carbon nano-tubes are all the new carbons of excellent performance, rich with specific surface area higher and surface
Rich functional group.Have substantial amounts of hydroxyl, carboxyl and epoxide group in graphene oxide and multi-wall carbon nano-tube pipe surface, can with have
Engine dyeing material produces stronger interaction force.The present invention is first by aerobic particle mud, Fe3O4, graphene oxide and many wall carbon receives
The compound prepared magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent of mitron, the method is simply easy
OK, high to waste water from dyestuff clearance, adsorption process does not cause secondary pollution, adsorbent reusable edible.
The content of the invention
It is an object of the invention to provide a kind of compound suction of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes
Attached dose of preparation method.Received the present invention also aims to provide a kind of many wall carbon of magnetic aerobic particle mud-graphene oxide-
The method that mitron compound adsorbent removes waste water from dyestuff.
Technical scheme is as follows：
1. a kind of preparation of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, including it is following
Step：
（1）The preparation of aerobic particle mud powder：The aerobic particle mud that will be cultivated in the sbr reactor device of laboratory is clear with ultra-pure water
Wash 3~5 times, then dried at 100~110 DEG C, grinding, 60~160 mesh sieving obtains dewatered sludge powder；
（2）Fe3O4Preparation：By 0.5~1.5 g FeCl3·6H2O is dissolved in 10~30 mL ethylene glycol, it is subsequently adding 1~
5 g NaAc and 5~15 mL ethylenediamines, mixture are placed in reactor after being stirred vigorously 10~50 min, are heated to 200 C
And 6~9 h are kept, room temperature is cooled to, the Fe for obtaining3O4Cleaned repeatedly with ultra-pure water until neutral；
（3）The preparation of graphene oxide：The potassium permanganate of the graphite of 0.2~0.5 g and 1.5~2.0 g is mixed, addition 30~
The phosphoric acid of the concentrated sulfuric acid of 40 mL and 3~5 mL, there-necked flask is placed on 10~14 h is reacted in 40~60 DEG C of oil baths, reaction knot
Solution is poured on 30~50 mL on ice after beam, magnetic agitation is lentamente carried out, the hydrogen peroxide of 0.3~0.5 mL is added, instead
20~40 min are answered, the mixture for obtaining is centrifuged under the rotating speed of 6000~9000 r/min, and the mixture for obtaining uses salt respectively
Acid, ethanol and ether cleaning, the solid sample for finally obtaining 30~60 C in vacuum drying chamber are dried；
（4）The preparation of graphene oxide-multi-walled carbon nano-tubes：0.1~0.3 g graphene oxides and multi-walled carbon nano-tubes are distinguished
It is distributed in 20~40 mL water, then mixes, then the min of mixed liquor ultrasound 20~40 stirs 20~40 min, what is obtained divides
Dispersion liquid dries 24 h under 60~100 C；
（5）The preparation of magnetic aerobic particle mud-graphene oxide-multi-wall carbon nano-tube composite material：By step（4）Prepare
Graphene oxide-the multi-walled carbon nano-tubes of 0.1~0.6 g is dissolved in acetic acid, by mixed liquor 1~3 h of ultrasound at room temperature, will
Step（2）The Fe of 0.1~0.5 g for preparing3O4It is added in above-mentioned mixed liquor and the h of mechanical agitation 1~3, adds 1~5 mL liquid
Body paraffin after 0.1~1 h of stirring, adds 1~5 mL glutaraldehydes, by step as emulsifying agent（1）0.1~0.6 g for preparing is good
Oxygen granule sludge dry powder is added to above-mentioned mixed liquor and 1~3 h is persistently stirred in 30~70 DEG C of oil baths, and pH of mixed is with 1 ~ 3
Mol/L NaOH adjustment continues to keep 30~90 min, the product for obtaining under the conditions of 70~90 DEG C of oil baths 8.0~11.0
Thing petroleum ether, ethanol and deionized water are washed successively, and until pH is neutrality, the black solid for obtaining is true at 40~60 DEG C
Sky is dried, and magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent is finally obtained.
A kind of aerobic grain used by magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent
Sludge takes from laboratory sbr reactor device, and sludge particle diameter is 1 ~ 3 mm.
A kind of preparation of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, its feature exists
In for the removal of water cationic dyestuff, step is as follows：
The dye of positive ion solution of 20 ~ 50 mL, 40 ~ 60 mg/L is taken in the conical flask of 100 mL, the magnetic of 10 ~ 30 mg is added
Property aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, be placed at 20 ~ 40 DEG C and 3 ~ 6 vibrated in shaking table
H, takes out mixed liquor, and separation of solid and liquid is carried out with externally-applied magnetic field, takes supernatant ultraviolet specrophotometer measurement absorbance, calculates sun
Ionic dye clearance.
A kind of preparation of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, its feature exists
In the dye of positive ion is selected from one of following：Methylene blue, methyl orange, malachite green, crystal violet.
Useful achievement of the invention
1. magnetic aerobic grain is prepared by raw material of aerobic particle mud, graphene oxide and multi-walled carbon nano-tubes in the present invention
Sludge-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, not only makes sludge obtain recycling, and obtain
A kind of magnetic aerobic particle mud-graphene oxide-multi-wall carbon nano-tube composite material.
2. the magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent that prepared by the present invention is utilized
In the larger specific surface area of graphene oxide, multi-walled carbon nano-tubes and aerobic particle mud enrich functional group, realize to sun from
The efficient removal of sub- dyestuff, with larger application prospect.
3. the present invention is first by aerobic particle mud, Fe3O4, graphene oxide and multi-walled carbon nano-tubes it is compound, prepare work
Skill is simple, and adsorbent can be easily separated.
A kind of preparation of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent of embodiment 1
Method
(1) preparation of aerobic particle mud powder：The aerobic particle mud that will be cultivated in the sbr reactor device of laboratory is clear with ultra-pure water
Wash 3~5 times, then dried at 100~110 DEG C, grinding, 60~160 mesh sieving obtains dewatered sludge powder；
(2)Fe3O4Preparation：By 0.5 g FeCl3•6H2O is dissolved in 10 mL ethylene glycol, is subsequently adding 3 g NaAc and 5
ML ethylenediamines, mixture is placed in reactor after being stirred vigorously 20 min, is heated to 200 C and is kept 7 h, is cooled to room temperature
Afterwards, black solid ultra-pure water is cleaned repeatedly until neutrality, obtains final product Fe after drying3O4Powder；
(3) preparation of graphene oxide：The potassium permanganate of the graphite of 0.3 g and 1.5 g is mixed, the concentrated sulfuric acid of 30 mL is added
With the phosphoric acid of 3 mL, there-necked flask is placed on 10 h are reacted in 40 DEG C of oil baths, solution is poured on the ice of 30 mL after terminating for reaction
On, magnetic agitation is lentamente carried out, the hydrogen peroxide of 0.3 mL is added, 20 min are reacted, the mixture for obtaining is in 7000 r/
It is centrifuged under the rotating speed of min, the mixture for obtaining is cleaned with hydrochloric acid, ethanol and ether respectively, and the solid sample for finally obtaining is true
40 C are dried in empty drying box；
(4) preparation of graphene oxide-multi-walled carbon nano-tubes：0.1 g graphene oxides and multi-walled carbon nano-tubes are disperseed respectively
To in 20 mL water, then mix, then mixed liquor 20 min of ultrasound stir 20 min, the dispersion liquid for obtaining is done under 60 C
Dry 24 h；
(5) preparation of magnetic aerobic particle mud-graphene oxide-multi-wall carbon nano-tube composite material：By in step (4)
Graphene oxide-the multi-walled carbon nano-tubes of 0.4 g is dissolved in acetic acid, by mixed liquor ultrasonic 1 h at room temperature, by step (2)
In 0.3 g Fe3O4It is added in above-mentioned mixed liquor and the h of mechanical agitation 1, adds 3 mL atoleines as emulsifying agent, stirs
After mixing 0.3 h, 3 mL glutaraldehydes are added, 0.4 g aerobic particle mud dry powders in step (1) are added to above-mentioned mixed liquor simultaneously
1 h is persistently stirred in 40 DEG C of oil baths, 1 mol/L NaOH of pH of mixed are adjusted to 8.0, and continue in 70 DEG C of oil bath bars
30 min are kept under part, product petroleum ether, ethanol and the deionized water for obtaining are washed successively, until pH is neutrality, obtained
Black solid is vacuum dried at 40 DEG C, magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes is finally obtained multiple
Close adsorbent.
A kind of preparation of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent of embodiment 2
Method
(1) preparation of aerobic particle mud powder：The aerobic particle mud that will be cultivated in the sbr reactor device of laboratory is clear with ultra-pure water
Wash 3~5 times, then dried at 100~110 DEG C, grinding, 60~160 mesh sieving obtains dewatered sludge powder；
(2)Fe3O4Preparation：By 1 g FeCl3•6H2O is dissolved in 20 mL ethylene glycol, is subsequently adding 4 g NaAc and 10 mL
Ethylenediamine, mixture is placed in reactor after being stirred vigorously 30 min, is heated to 200 C and is kept 8 h, is cooled to room temperature, will
Black solid ultra-pure water is cleaned repeatedly until neutrality, obtains final product Fe after drying3O4Powder；
(3) preparation of graphene oxide：The potassium permanganate of the graphite of 0.4 g and 1.8 g is mixed, the concentrated sulfuric acid of 35 mL is added
With the phosphoric acid of 4 mL, there-necked flask is placed on 11 h are reacted in 50 DEG C of oil baths, solution is poured on the ice of 40 mL after terminating for reaction
On, magnetic agitation is lentamente carried out, the hydrogen peroxide of 0.4 mL is added, 30 min are reacted, the mixture for obtaining is in 8000 r/
It is centrifuged under the rotating speed of min, the mixture for obtaining is cleaned with hydrochloric acid, ethanol and ether respectively, and the solid sample for finally obtaining is true
50 C are dried in empty drying box；
(4) preparation of graphene oxide-multi-walled carbon nano-tubes：0.2 g graphene oxides and multi-walled carbon nano-tubes are disperseed respectively
To in 30 mL water, then mixed liquor 30 min of ultrasound stir 30 min, and the dispersion liquid for obtaining dries 24 h under 80 C；
(5) preparation of magnetic aerobic particle mud-graphene oxide-multi-wall carbon nano-tube composite material：By step（4）In
Graphene oxide-the multi-walled carbon nano-tubes of 0.5 g is dissolved in acetic acid, by mixed liquor ultrasonic 2 h at room temperature, by step（2）
In 0.4 g Fe3O4It is added in above-mentioned mixed liquor and the h of mechanical agitation 2, adds 4 mL atoleines as emulsifying agent, stirs
After mixing 0.5 h, 4 mL glutaraldehydes are added, by step（1）In 0.5 g aerobic particle mud dry powders be added to above-mentioned mixed liquor simultaneously
2 h are persistently stirred in 50 DEG C of oil baths, pH of mixed is adjusted 9.0 with 2 mol/L NaOH, and is continued in 80 DEG C of oil bath conditions
60 min of lower holding, product petroleum ether, ethanol and the deionized water for obtaining is washed successively, and until pH is neutrality, what is obtained is black
Color solid is vacuum dried at 50 DEG C, and the compound suction of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes is finally obtained
Attached dose.
A kind of preparation side of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent of embodiment 3
Method
(1) preparation of aerobic particle mud powder：The aerobic particle mud that will be cultivated in the sbr reactor device of laboratory is clear with ultra-pure water
Wash 3~5 times, then dried at 100~110 DEG C, grinding, 60~160 mesh sieving obtains dewatered sludge powder；
(2)Fe3O4Preparation：By 1.5 g FeCl3•6H2O is dissolved in 30 mL ethylene glycol, is subsequently adding 5 g NaAc and 15
ML ethylenediamines, mixture is placed in reactor after being stirred vigorously 40 min, is heated to 200 C and is kept 9 h, is cooled to room temperature,
Black solid ultra-pure water is cleaned repeatedly until neutrality, obtains final product Fe after drying3O4Powder；
(3) preparation of graphene oxide：The potassium permanganate of the graphite of 0.5 g and 2.0 g is mixed, the concentrated sulfuric acid of 40 mL is added
With the phosphoric acid of 5 mL, there-necked flask is placed on 12 h are reacted in 60 DEG C of oil baths, solution is poured on the ice of 50 mL after terminating for reaction
On, magnetic agitation is lentamente carried out, the hydrogen peroxide of 0.5 mL is added, 40 min are reacted, the mixture for obtaining is in 9000 r/
It is centrifuged under the rotating speed of min, the mixture for obtaining is cleaned with hydrochloric acid, ethanol and ether respectively, and the solid sample for finally obtaining is true
60 C are dried in empty drying box；
(4) preparation of graphene oxide-multi-walled carbon nano-tubes：0.3 g graphene oxides and multi-walled carbon nano-tubes are disperseed respectively
To in 40 mL water, then mixed liquor 40 min of ultrasound stir 40 min, and the dispersion liquid for obtaining dries 24 h under 100 C；
(5) preparation of magnetic aerobic particle mud-graphene oxide-multi-wall carbon nano-tube composite material：By in step (4)
Graphene oxide-the multi-walled carbon nano-tubes of 0.6 g is dissolved in acetic acid, by mixed liquor ultrasonic 3 h at room temperature, by step (2)
In 0.5 g Fe3O4It is added in above-mentioned mixed liquor and the h of mechanical agitation 3, adds 5 mL atoleines as emulsifying agent, stirs
After mixing 1 h, add 5 mL glutaraldehydes, by 0.6 g aerobic particle mud dry powders in step (1) be added to above-mentioned mixed liquor and
3 h are persistently stirred in 70 DEG C of oil baths, pH of mixed is adjusted 10.0 with 3 mol/L NaOH, and is continued in 90 DEG C of oil bath conditions
90 min of lower holding, product petroleum ether, ethanol and the deionized water for obtaining is washed successively, and until pH is neutrality, what is obtained is black
Color solid is vacuum dried at 60 DEG C, magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes is finally obtained and is combined
Adsorbent.
The removal of the methyl orange of embodiment 4
The methyl orange solution of 40 mL, 50 mg/L is taken in the conical flask of 100 mL, adds the magnetic aerobic grain of 10 mg dirty
Mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, is placed in shaking table at 20 DEG C and vibrates 4 h, takes out mixed liquor, uses magnetic
Iron separates adsorbent and solution, supernatant spectrophotometer measurement absorbance is taken, according to the initial concentration and solution of dyestuff
The residual concentration of middle dyestuff, it is 83.2% to calculate methyl orange clearance, and adsorbance is 208.3 mg/g.
The removal of the methylene blue of embodiment 5
The methylene blue solution of 25 mL, 50 mg/L is taken in the conical flask of 100 mL, adds the magnetic aerobic grain of 10 mg dirty
Mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, is placed in shaking table at 25 DEG C and vibrates 5 h, takes out mixed liquor, uses magnetic
Iron separates adsorbent and solution, supernatant spectrophotometer measurement absorbance is taken, according to the initial concentration and solution of dyestuff
The residual concentration of middle dyestuff, it is 93.9% to calculate methylene blue clearance, and adsorbance is 386.0 mg/g.
The removal of the crystal violet of embodiment 6
The crystal violet solution of 25 mL, 100 mg/L is taken in the conical flask of 100 mL, adds the magnetic aerobic grain of 15 mg dirty
Mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, is placed in shaking table at 25 DEG C and vibrates 4 h, takes out mixed liquor, uses magnetic
Iron separates adsorbent and solution, supernatant spectrophotometer measurement absorbance is taken, according to the initial concentration and solution of dyestuff
The residual concentration of middle dyestuff, it is 92.3% to calculate crystal violet clearance, and adsorbance is 338.7 mg/g.
The removal of the malachite green of embodiment 7
The malachite green solution of 40 mL, 100 mg/L is taken in the conical flask of 100 mL, the magnetic aerobic grain of 15 mg is added
Sludge-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, is placed in shaking table at 20 DEG C and vibrates 5 h, takes out mixed liquor, uses
Magnet separates adsorbent and solution, takes supernatant spectrophotometer measurement absorbance, initial concentration according to dyestuff and molten
The residual concentration of dyestuff in liquid, it is 90.1% to calculate malachite green clearance, and adsorbance is 220.7 mg/g.
Claims (4)
1. a kind of preparation of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, its feature exists
In comprising the following steps：
（1）The preparation of aerobic particle mud powder：The aerobic particle mud that will be cultivated in the sbr reactor device of laboratory is clear with ultra-pure water
Wash 3~5 times, then dried at 100~110 DEG C, grinding, 60~160 mesh sieving obtains dewatered sludge powder；
（2）Fe3O4Preparation：By 0.5~1.5 g FeCl3·6H2O is dissolved in 10~30 mL ethylene glycol, is subsequently adding 1~5
G NaAc and 5~15 mL ethylenediamines, mixture are placed in reactor after being stirred vigorously 10~50 min, are heated to 200 C simultaneously
6~9 h are kept, room temperature is cooled to, the Fe for obtaining3O4Cleaned repeatedly with ultra-pure water until neutral；
（3）The preparation of graphene oxide：The potassium permanganate of the graphite of 0.2~0.5 g and 1.5~2.0 g is mixed, addition 30~
The phosphoric acid of the concentrated sulfuric acid of 40 mL and 3~5 mL, there-necked flask is placed on 10~14 h is reacted in 40~60 DEG C of oil baths, reaction knot
Solution is poured on 30~50 mL on ice after beam, magnetic agitation is lentamente carried out, the hydrogen peroxide of 0.3~0.5 mL is added, instead
20~40 min are answered, the mixture for obtaining is centrifuged under the rotating speed of 6000~9000 r/min, and the mixture for obtaining uses salt respectively
Acid, ethanol and ether cleaning, the solid sample for finally obtaining 30~60 C in vacuum drying chamber are dried；
（4）The preparation of graphene oxide-multi-walled carbon nano-tubes：0.1~0.3 g graphene oxides and multi-walled carbon nano-tubes are distinguished
It is distributed in 20~40 mL water, then mixes, then the min of mixed liquor ultrasound 20~40 stirs 20~40 min, what is obtained divides
Dispersion liquid dries 24 h under 60~100 C；
（5）The preparation of magnetic aerobic particle mud-graphene oxide composite material：By step（4）0.1~0.6 g's for preparing
Graphene oxide-multi-walled carbon nano-tubes is dissolved in acetic acid, by mixed liquor 1~3 h of ultrasound at room temperature, by step（2）Prepare
0.1~0.5 g Fe3O4It is added in above-mentioned mixed liquor and the h of mechanical agitation 1~3, adds 1~5 mL atoleine conducts
Emulsifying agent, after 0.1~1 h of stirring, adds 1~5 mL glutaraldehydes, by step（1）0.1~0.6 g aerobic particle muds for preparing
Dry powder is added to above-mentioned mixed liquor and 1~3 h is persistently stirred in 30~70 DEG C of oil baths, and pH of mixed is with 1 ~ 3 mol/L NaOH
Adjustment continues to keep 30~90 min under the conditions of 70~90 DEG C of oil baths 8.0~11.0, the product petroleum ether for obtaining,
Ethanol and deionized water are washed successively, and until pH is neutrality, the black solid for obtaining is vacuum dried at 40~60 DEG C, finally
Magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent is obtained.
2. aerobic grain used by a kind of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent is dirty
Mud takes from laboratory sbr reactor device, and sludge particle diameter is 1 ~ 3 mm.
3. a kind of preparation of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, its feature exists
In for the removal of water cationic dyestuff, step is as follows：
The dye of positive ion solution of 20 ~ 50 mL, 40 ~ 60 mg/L is taken in the conical flask of 100 mL, the magnetic of 10 ~ 30 mg is added
Property aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, be placed at 20 ~ 40 DEG C and 3 ~ 6 vibrated in shaking table
H, takes out mixed liquor, and separation of solid and liquid is carried out with externally-applied magnetic field, supernatant ultraviolet specrophotometer measurement absorbance is taken, according to dye
The residual concentration of dyestuff in the initial concentration and solution of material, calculates dye of positive ion clearance.
4. a kind of preparation of magnetic aerobic particle mud-graphene oxide-multi-walled carbon nano-tubes compound adsorbent, its feature exists
In the dye of positive ion is selected from one of following：Methylene blue, methyl orange, malachite green, crystal violet.
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