CN109289772A - A kind of carbon nanotube/hydrotalcite material and preparation method removing nitrate nitrogen in water removal - Google Patents
A kind of carbon nanotube/hydrotalcite material and preparation method removing nitrate nitrogen in water removal Download PDFInfo
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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- B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
- B01J20/0296—Nitrates of compounds other than those provided for in B01J20/04
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- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
Abstract
The present invention relates to the technical fields of nitric wastewater processing, provide a kind of carbon nanotube/hydrotalcite material and preparation method for removing nitrate nitrogen in water removal.This method passes through the neatly rock layers of coprecipitation in-situ preparation doped lanthanum on the tube wall of multi-walled carbon nanotube, and surface is carried out to neatly rock layers using cationic surfactant bromide sixteen alkyls pyridine and is modified, the carbon nanotube/hydrotalcite material for removing nitrate nitrogen in water removal is made.Preparation method of the invention, hydrotalcite is carried on the tube wall of multi-walled carbon nanotube, increases the specific surface area of hydrotalcite, is conducive to expose more active sites, and be doped using rare earth lanthanum, lanthanum can be with NO3 ‑Complexing forms stable polyamines complex, further, carries out surface using bromide sixteen alkyls pyridine and is modified, can reduce the electronegativity of hydrotalcite surface, is NO3 ‑Absorption more active sites are provided, therefore there is good removal effect to the nitrate nitrogen in water.
Description
Technical field
The invention belongs to nitric wastewater processing technical field, provide it is a kind of go water removal in nitrate nitrogen carbon nanotube/
Hydrotalcite material and preparation method.
Background technique
The form that is primarily present of nitrogen in nature has NH3、N2、N2O、NO2、NO2 -、NO3 -And organic nitrogen, due to the mankind
Interference, destroy nature Nitrogen balance, cause Water Environment Nitrogen cellulose content increase.Wherein, nitrate nitrogen (NO2 -、NO3 -) be
The most common chemical contamination, and its level of pollution is still being continuously increased.Nitrate nitrogen is not only from a wealth of sources, but also almost all of nitre
Hydrochlorate is soluble, and solubility is very big, this results in nitrate fast transferring can spread in water and soil, causes big model
The nitrate nitrogen pollution enclosed, so common concern of the removal of nitrate nitrogen by various countries environmental worker in waste water.
Common denitrogenation method have physics denitrogenation (absorption etc.), chemical denitrogenation (Zero-valent Iron and magnesium-reduced, ion exchange, instead
Infiltration, electrodialysis, catalysis denitrogenation) and biological denitrificaion etc..Wherein, the design of absorption method is simple, easy to operate, is normally used for
Except organic matter different types of in waste water and inorganic matter, especially class talcs adsorbent are higher to the removal rate of nitrate anion, because
And it is taken seriously.
Hydrotalcite material belongs to anion type laminated compound, and lamellar compound refers to layer structure, interlayer ion,
A kind of compound with interchangeability, using lamellar compound main body under highly polar molecular action possessed by intercalation
With the interchangeability of interlayer ion, some functional guest species are introduced into bedding void and strut to be formed by laminate distance
Layer-pillared compound.Cation on its laminate has same order elements, and interlayer anion has interchangeability, and architectural characteristic is only
Special, composition and structure are adjustable, there is special memory effect, and absorption property is good, become the good selection of removal nitrate nitrogen.
Chinese invention patent application number 200810157761.2 discloses a kind of preparation of the magnalium hydrotalcite of modification forming
Method and application.It is prepared respectively when preparation and contains Mg2+、Al3+Mixed-salt aqueous solution and mixing aqueous alkali, the two is mixed,
Aging and crystallization are carried out after complete reaction, are filtered, washed, are dried to obtain magnalium hydrotalcite；By the magnalium hydrotalcite and glue
Knot agent is added in magnesium salt solution, is adjusted the pH value of gained slurry, is centrifugated after reaction, is dried, extrusion molding, then
Drying roasting, is cooled to room temperature.The product of the invention is easily isolated after not blocking bed body, reaction when adsorbing and ion exchange,
Suitable for handling aqueous solution, sewage treatment plant's water, seawater, the phosphorus nitrogen anion breeding wastewater.But it is modified made from the invention
The surface-active site of hydrotalcite is less, and efficiencies of nitrogen removal is still to be improved.
In conclusion when the common hydrotalcite of the prior art is used for sewage treatment containing nitrate nitrogen, due to surface-active site
It is less, lead to NO3 -Removal effect it is undesirable, therefore develop a kind of hydrotalcite composite wood that can efficiently remove nitrate nitrogen in water removal
Material, has great significance.
Summary of the invention
As it can be seen that, since surface-active site is less, leading to NO when usually hydrotalcite is used for sewage treatment containing nitrate nitrogen3 -'s
Removal effect is undesirable.In response to this, the present invention proposes a kind of carbon nanotube/hydrotalcite material for removing nitrate nitrogen in water removal
And preparation method, it can effectively overcome drawbacks described above, there is good removal effect to the nitrate nitrogen in water.
To achieve the above object, specific technical solution of the present invention is as follows:
A kind of carbon nanotube/hydrotalcite material preparation method for removing nitrate nitrogen in water removal, the carbon nanotube/hydrotalcite material
Specific step is as follows for preparation:
(1) magnesium nitrate hexahydrate, ANN aluminium nitrate nonahydrate, lanthanum nitrate hexahydrate are added in deionized water, obtain solution A；By carbon
Sour sodium, sodium hydroxide are added in deionized water, obtain solution B；
(2) it disperses multi-walled carbon nanotube in deionized water, and heats dispersion liquid, then instill solution A simultaneously with solution B
In multi-walled carbon nanotube dispersion liquid, strong stirring is reacted, then stands 3 ~ 4h, is generated and is mixed on the tube wall of multi-walled carbon nanotube
The neatly rock layers of miscellaneous lanthanum；
(3) it further heats up and carries out hydro-thermal ageing, refilter, wash, disperse bromide sixteen alkyls pyridine for obtained solid object
Ethanol solution in, adjust pH value to 9 ~ 10, sonic oscillation simultaneously heats and carries out surface modification treatment to neatly rock layers, using
Filter, washing, dry, the obtained carbon nanotube/hydrotalcite material for removing nitrate nitrogen in water removal.
Preferably, in step (1) described solution A, 10 ~ 12 parts by weight of magnesium nitrate hexahydrate, 7 ~ 10 weight of ANN aluminium nitrate nonahydrate
Measure part, 2 ~ 3 parts by weight of lanthanum nitrate hexahydrate, 75 ~ 81 parts by weight of deionized water.
Preferably, in step (1) described solution B, 5 ~ 8 parts by weight of sodium carbonate, 3 ~ 5 parts by weight of sodium hydroxide, deionized water
87 ~ 92 parts by weight.
Preferably, the parts by weight of each raw material are in step (2) described reaction system, 15 ~ 20 parts by weight of multi-walled carbon nanotube,
50 ~ 65 parts by weight of deionized water, 10 ~ 15 parts by weight of solution A, 10 ~ 15 parts by weight of solution B.
Preferably, step (2) reaction temperature is 70 ~ 80 DEG C, and the time is 6 ~ 8h.
Preferably, the temperature of step (3) the hydro-thermal ageing is 100 ~ 110 DEG C, and the time is 10 ~ 12h.
Preferably, in the ethanol solution of step (3) described bromide sixteen alkyls pyridine, bromide sixteen alkyls pyridine 20 ~ 40
Parts by weight, 60 ~ 80 parts by weight of ethyl alcohol.
Preferably, the temperature of step (3) described surface modification treatment is 40 ~ 50 DEG C, and sonic oscillation frequency is 50 ~ 80kHz,
Time is 18 ~ 22h.
A kind of carbon nanotube for removing nitrate nitrogen in water removal being prepared the present invention also provides a kind of above-mentioned preparation method/
Hydrotalcite material.Carbon nanotube/the hydrotalcite material is given birth in situ on the tube wall of multi-walled carbon nanotube by coprecipitation
At the neatly rock layers of doped lanthanum, and surface is carried out to neatly rock layers using cationic surfactant bromide sixteen alkyls pyridine and is changed
Property and be made.
It is and existing the present invention provides a kind of carbon nanotube/hydrotalcite material and preparation method for removing nitrate nitrogen in water removal
Technology is compared, and the feature and excellent effect protruded is:
1. generated in-situ hydrotalcite is carried on the tube wall of multi-walled carbon nanotube, increases water by preparation method of the invention
The specific surface area of talcum is conducive to expose more active sites.
2. preparation method of the invention is doped neatly rock layers using rare earth lanthanum, lanthanum can be with NO3 -Complexing is formed
Stable polyamines complex, may advantageously facilitate the Adsorption to nitrate nitrogen.
3. preparation method of the invention carries out neatly rock layers using cationic surfactant bromide sixteen alkyls pyridine
Surface is modified, can reduce the electronegativity of hydrotalcite surface layer, is NO3 -Absorption more active sites are provided, therefore in water
Nitrate nitrogen has good removal effect.
Specific embodiment
In the following, the present invention will be further described in detail by way of specific embodiments, but this should not be interpreted as to the present invention
Range be only limitted to example below.Without departing from the idea of the above method of the present invention, according to ordinary skill
The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
(1) magnesium nitrate hexahydrate, ANN aluminium nitrate nonahydrate, lanthanum nitrate hexahydrate are added in deionized water, obtain solution A；By carbon
Sour sodium, sodium hydroxide are added in deionized water, obtain solution B；In solution A, 11 parts by weight of magnesium nitrate hexahydrate, nine nitric hydrates
9 parts by weight of aluminium, 2 parts by weight of lanthanum nitrate hexahydrate, 78 parts by weight of deionized water；In solution B, 7 parts by weight of sodium carbonate, sodium hydroxide
4 parts by weight, 89 parts by weight of deionized water；
(2) it disperses multi-walled carbon nanotube in deionized water, and heats dispersion liquid, then instill solution A simultaneously with solution B
In multi-walled carbon nanotube dispersion liquid, strong stirring is reacted, then stands 3.5h, is generated and is mixed on the tube wall of multi-walled carbon nanotube
The neatly rock layers of miscellaneous lanthanum；The parts by weight of each raw material are in reaction system, 17 parts by weight of multi-walled carbon nanotube, 57 weight of deionized water
Part, 13 parts by weight of solution A, 13 parts by weight of solution B；Reaction temperature is 76 DEG C, time 7h；
(3) it further heats up and carries out hydro-thermal ageing, refilter, wash, disperse bromide sixteen alkyls pyridine for obtained solid object
Ethanol solution in, adjust pH value to 9.5, sonic oscillation simultaneously heats and carries out surface modification treatment to neatly rock layers, using filter,
Washing, dry, the obtained carbon nanotube/hydrotalcite material for removing nitrate nitrogen in water removal；The temperature of hydro-thermal ageing is 106 DEG C, the time
For 11h；In the ethanol solution of bromide sixteen alkyls pyridine, 28 parts by weight of bromide sixteen alkyls pyridine, 72 parts by weight of ethyl alcohol；Surface
The temperature of modification is 46 DEG C, and sonic oscillation frequency is 70kHz, time 21h.
Embodiment 2
(1) magnesium nitrate hexahydrate, ANN aluminium nitrate nonahydrate, lanthanum nitrate hexahydrate are added in deionized water, obtain solution A；By carbon
Sour sodium, sodium hydroxide are added in deionized water, obtain solution B；In solution A, 10 parts by weight of magnesium nitrate hexahydrate, nine nitric hydrates
8 parts by weight of aluminium, 2 parts by weight of lanthanum nitrate hexahydrate, 80 parts by weight of deionized water；In solution B, 6 parts by weight of sodium carbonate, sodium hydroxide
4 parts by weight, 90 parts by weight of deionized water；
(2) it disperses multi-walled carbon nanotube in deionized water, and heats dispersion liquid, then instill solution A simultaneously with solution B
In multi-walled carbon nanotube dispersion liquid, strong stirring is reacted, then stands 3h, and doping is generated on the tube wall of multi-walled carbon nanotube
The neatly rock layers of lanthanum；The parts by weight of each raw material are in reaction system, 16 parts by weight of multi-walled carbon nanotube, 62 weight of deionized water
Part, 11 parts by weight of solution A, 11 parts by weight of solution B；Reaction temperature is 72 DEG C, time 7.5h；
(3) it further heats up and carries out hydro-thermal ageing, refilter, wash, disperse bromide sixteen alkyls pyridine for obtained solid object
Ethanol solution in, adjust pH value to 9, sonic oscillation simultaneously heats and carries out surface modification treatment to neatly rock layers, using filtering, wash
It washs, dry, the carbon nanotube/hydrotalcite material for removing nitrate nitrogen in water removal is made；The temperature of hydro-thermal ageing is 102 DEG C, and the time is
11.5h；In the ethanol solution of bromide sixteen alkyls pyridine, 25 parts by weight of bromide sixteen alkyls pyridine, 75 parts by weight of ethyl alcohol；Surface
The temperature of modification is 42 DEG C, and sonic oscillation frequency is 60kHz, time 21h.
Embodiment 3
(1) magnesium nitrate hexahydrate, ANN aluminium nitrate nonahydrate, lanthanum nitrate hexahydrate are added in deionized water, obtain solution A；By carbon
Sour sodium, sodium hydroxide are added in deionized water, obtain solution B；In solution A, 12 parts by weight of magnesium nitrate hexahydrate, nine nitric hydrates
9 parts by weight of aluminium, 3 parts by weight of lanthanum nitrate hexahydrate, 76 parts by weight of deionized water；In solution B, 7 parts by weight of sodium carbonate, sodium hydroxide
5 parts by weight, 88 parts by weight of deionized water；
(2) it disperses multi-walled carbon nanotube in deionized water, and heats dispersion liquid, then instill solution A simultaneously with solution B
In multi-walled carbon nanotube dispersion liquid, strong stirring is reacted, then stands 4h, and doping is generated on the tube wall of multi-walled carbon nanotube
The neatly rock layers of lanthanum；The parts by weight of each raw material are in reaction system, 18 parts by weight of multi-walled carbon nanotube, 56 weight of deionized water
Part, 13 parts by weight of solution A, 13 parts by weight of solution B；Reaction temperature is 78 DEG C, time 6.5h；
(3) it further heats up and carries out hydro-thermal ageing, refilter, wash, disperse bromide sixteen alkyls pyridine for obtained solid object
Ethanol solution in, adjust pH value to 10, sonic oscillation simultaneously heats and carries out surface modification treatment to neatly rock layers, using filter,
Washing, dry, the obtained carbon nanotube/hydrotalcite material for removing nitrate nitrogen in water removal；The temperature of hydro-thermal ageing is 108 DEG C, the time
For 10.5h；In the ethanol solution of bromide sixteen alkyls pyridine, 35 parts by weight of bromide sixteen alkyls pyridine, 65 parts by weight of ethyl alcohol；Table
The temperature of face modification is 48 DEG C, and sonic oscillation frequency is 70kHz, time 19h.
Embodiment 4
(1) magnesium nitrate hexahydrate, ANN aluminium nitrate nonahydrate, lanthanum nitrate hexahydrate are added in deionized water, obtain solution A；By carbon
Sour sodium, sodium hydroxide are added in deionized water, obtain solution B；In solution A, 10 parts by weight of magnesium nitrate hexahydrate, nine nitric hydrates
7 parts by weight of aluminium, 2 parts by weight of lanthanum nitrate hexahydrate, 81 parts by weight of deionized water；In solution B, 5 parts by weight of sodium carbonate, sodium hydroxide
3 parts by weight, 92 parts by weight of deionized water；
(2) it disperses multi-walled carbon nanotube in deionized water, and heats dispersion liquid, then instill solution A simultaneously with solution B
In multi-walled carbon nanotube dispersion liquid, strong stirring is reacted, then stands 3h, and doping is generated on the tube wall of multi-walled carbon nanotube
The neatly rock layers of lanthanum；The parts by weight of each raw material are in reaction system, 15 parts by weight of multi-walled carbon nanotube, 65 weight of deionized water
Part, 10 parts by weight of solution A, 10 parts by weight of solution B；Reaction temperature is 70 DEG C, time 8h；
(3) it further heats up and carries out hydro-thermal ageing, refilter, wash, disperse bromide sixteen alkyls pyridine for obtained solid object
Ethanol solution in, adjust pH value to 9, sonic oscillation simultaneously heats and carries out surface modification treatment to neatly rock layers, using filtering, wash
It washs, dry, the carbon nanotube/hydrotalcite material for removing nitrate nitrogen in water removal is made；The temperature of hydro-thermal ageing is 100 DEG C, and the time is
12h；In the ethanol solution of bromide sixteen alkyls pyridine, 20 parts by weight of bromide sixteen alkyls pyridine, 80 parts by weight of ethyl alcohol；Surface changes
Property processing temperature be 40 DEG C, sonic oscillation frequency be 50kHz, time 22h.
Embodiment 5
(1) magnesium nitrate hexahydrate, ANN aluminium nitrate nonahydrate, lanthanum nitrate hexahydrate are added in deionized water, obtain solution A；By carbon
Sour sodium, sodium hydroxide are added in deionized water, obtain solution B；In solution A, 12 parts by weight of magnesium nitrate hexahydrate, nine nitric hydrates
10 parts by weight of aluminium, 3 parts by weight of lanthanum nitrate hexahydrate, 75 parts by weight of deionized water；In solution B, 8 parts by weight of sodium carbonate, hydroxide
5 parts by weight of sodium, 87 parts by weight of deionized water；
(2) it disperses multi-walled carbon nanotube in deionized water, and heats dispersion liquid, then instill solution A simultaneously with solution B
In multi-walled carbon nanotube dispersion liquid, strong stirring is reacted, then stands 4h, and doping is generated on the tube wall of multi-walled carbon nanotube
The neatly rock layers of lanthanum；The parts by weight of each raw material are in reaction system, 20 parts by weight of multi-walled carbon nanotube, 50 weight of deionized water
Part, 15 parts by weight of solution A, 15 parts by weight of solution B；Reaction temperature is 80 DEG C, time 6h；
(3) it further heats up and carries out hydro-thermal ageing, refilter, wash, disperse bromide sixteen alkyls pyridine for obtained solid object
Ethanol solution in, adjust pH value to 10, sonic oscillation simultaneously heats and carries out surface modification treatment to neatly rock layers, using filter,
Washing, dry, the obtained carbon nanotube/hydrotalcite material for removing nitrate nitrogen in water removal；The temperature of hydro-thermal ageing is 110 DEG C, the time
For 10h；In the ethanol solution of bromide sixteen alkyls pyridine, 40 parts by weight of bromide sixteen alkyls pyridine, 60 parts by weight of ethyl alcohol；Surface
The temperature of modification is 50 DEG C, and sonic oscillation frequency is 80kHz, time 18h.
Embodiment 6
(1) magnesium nitrate hexahydrate, ANN aluminium nitrate nonahydrate, lanthanum nitrate hexahydrate are added in deionized water, obtain solution A；By carbon
Sour sodium, sodium hydroxide are added in deionized water, obtain solution B；In solution A, 11 parts by weight of magnesium nitrate hexahydrate, nine nitric hydrates
8 parts by weight of aluminium, 3 parts by weight of lanthanum nitrate hexahydrate, 78 parts by weight of deionized water；In solution B, 6 parts by weight of sodium carbonate, sodium hydroxide
4 parts by weight, 90 parts by weight of deionized water；
(2) it disperses multi-walled carbon nanotube in deionized water, and heats dispersion liquid, then instill solution A simultaneously with solution B
In multi-walled carbon nanotube dispersion liquid, strong stirring is reacted, then stands 3.5h, is generated and is mixed on the tube wall of multi-walled carbon nanotube
The neatly rock layers of miscellaneous lanthanum；The parts by weight of each raw material are in reaction system, 18 parts by weight of multi-walled carbon nanotube, 58 weight of deionized water
Part, 12 parts by weight of solution A, 12 parts by weight of solution B；Reaction temperature is 75 DEG C, time 7h；
(3) it further heats up and carries out hydro-thermal ageing, refilter, wash, disperse bromide sixteen alkyls pyridine for obtained solid object
Ethanol solution in, adjust pH value to 9.5, sonic oscillation simultaneously heats and carries out surface modification treatment to neatly rock layers, using filter,
Washing, dry, the obtained carbon nanotube/hydrotalcite material for removing nitrate nitrogen in water removal；The temperature of hydro-thermal ageing is 105 DEG C, the time
For 11h；In the ethanol solution of bromide sixteen alkyls pyridine, 30 parts by weight of bromide sixteen alkyls pyridine, 70 parts by weight of ethyl alcohol；Surface
The temperature of modification is 45 DEG C, and sonic oscillation frequency is 65kHz, time 20h.
Comparative example 1
In preparation process, hydrotalcite is not doped using rare earth lanthanum, other preparation conditions and embodiment 6 are consistent.
Comparative example 2
In preparation process, surface is not carried out to neatly rock layers using bromide sixteen alkyls pyridine and is modified, other preparation conditions and reality
It is consistent to apply example 6.
Performance test:
NO3 -Removal rate: certain density NO is prepared3 -Solution example is put into conical flask, using " HJ-T 346-2007 water quality
The measurement ultraviolet spectrophotometry of nitrate nitrogen " test NO3 -Initial concentration, then be added 0.2g carbon produced by the present invention receive
Mitron hydrotalcite material is put into shaking table and starts timing, and setting temperature is 25 DEG C, revolving speed 250r/min, respectively at 10min, 20min
NO is measured when with 30min3 -Concentration, ratio calculation NO is obtained according to the difference of concentration and initial value3 -Removal rate.
The data obtained is as shown in table 1.
Table 1:
Claims (9)
1. a kind of carbon nanotube/hydrotalcite material preparation method for removing nitrate nitrogen in water removal, which is characterized in that the carbon nanometer
Pipe/specific step is as follows for hydrotalcite material preparation:
(1) magnesium nitrate hexahydrate, ANN aluminium nitrate nonahydrate, lanthanum nitrate hexahydrate are added in deionized water, obtain solution A；By carbon
Sour sodium, sodium hydroxide are added in deionized water, obtain solution B；
(2) it disperses multi-walled carbon nanotube in deionized water, and heats dispersion liquid, then instill solution A simultaneously with solution B
In multi-walled carbon nanotube dispersion liquid, strong stirring is reacted, then stands 3 ~ 4h, is generated and is mixed on the tube wall of multi-walled carbon nanotube
The neatly rock layers of miscellaneous lanthanum；
(3) it further heats up and carries out hydro-thermal ageing, refilter, wash, disperse bromide sixteen alkyls pyridine for obtained solid object
Ethanol solution in, adjust pH value to 9 ~ 10, sonic oscillation simultaneously heats and carries out surface modification treatment to neatly rock layers, using
Filter, washing, dry, the obtained carbon nanotube/hydrotalcite material for removing nitrate nitrogen in water removal.
2. a kind of carbon nanotube/hydrotalcite material preparation method for removing nitrate nitrogen in water removal according to claim 1, special
Sign is: in step (1) described solution A, 10 ~ 12 parts by weight of magnesium nitrate hexahydrate, 7 ~ 10 parts by weight of ANN aluminium nitrate nonahydrate, six water
Close 2 ~ 3 parts by weight of lanthanum nitrate, 75 ~ 81 parts by weight of deionized water.
3. a kind of carbon nanotube/hydrotalcite material preparation method for removing nitrate nitrogen in water removal according to claim 1, special
Sign is: in step (1) described solution B, 5 ~ 8 parts by weight of sodium carbonate, 3 ~ 5 parts by weight of sodium hydroxide, 87 ~ 92 weight of deionized water
Part.
4. a kind of carbon nanotube/hydrotalcite material preparation method for removing nitrate nitrogen in water removal according to claim 1, special
Sign is: the parts by weight of each raw material are 15 ~ 20 parts by weight of multi-walled carbon nanotube, deionized water in step (2) described reaction system
50 ~ 65 parts by weight, 10 ~ 15 parts by weight of solution A, 10 ~ 15 parts by weight of solution B.
5. a kind of carbon nanotube/hydrotalcite material preparation method for removing nitrate nitrogen in water removal according to claim 1, special
Sign is: step (2) reaction temperature is 70 ~ 80 DEG C, and the time is 6 ~ 8h.
6. a kind of carbon nanotube/hydrotalcite material preparation method for removing nitrate nitrogen in water removal according to claim 1, special
Sign is: the temperature of step (3) the hydro-thermal ageing is 100 ~ 110 DEG C, and the time is 10 ~ 12h.
7. a kind of carbon nanotube/hydrotalcite material preparation method for removing nitrate nitrogen in water removal according to claim 1, special
Sign is: in the ethanol solution of step (3) described bromide sixteen alkyls pyridine, 20 ~ 40 parts by weight of bromide sixteen alkyls pyridine, second
60 ~ 80 parts by weight of alcohol.
8. a kind of carbon nanotube/hydrotalcite material preparation method for removing nitrate nitrogen in water removal according to claim 1, special
Sign is: the temperature of step (3) described surface modification treatment is 40 ~ 50 DEG C, and sonic oscillation frequency is 50 ~ 80kHz, time 18
~22h。
9. a kind of carbon nanotube/water for removing nitrate nitrogen in water removal that any one of claim 1 ~ 8 preparation method is prepared
Talc materials.
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| CN116395728A (en) * | 2023-03-24 | 2023-07-07 | 中国矿业大学 | Preparation method of fly ash-based hydrotalcite-like compound, and product and application thereof |
| CN116395728B (en) * | 2023-03-24 | 2024-02-13 | 中国矿业大学 | Preparation method of fly ash-based hydrotalcite-like compound, and product and application thereof |
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