CN109279675A - A kind of preparation method of active carbon loading silver - Google Patents
A kind of preparation method of active carbon loading silver Download PDFInfo
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- CN109279675A CN109279675A CN201811158036.7A CN201811158036A CN109279675A CN 109279675 A CN109279675 A CN 109279675A CN 201811158036 A CN201811158036 A CN 201811158036A CN 109279675 A CN109279675 A CN 109279675A
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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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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
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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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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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
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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Abstract
The invention discloses a kind of preparation methods of active carbon loading silver, first immerse active carbon in silver nitrate solution, stand 2-3 hours, and then heating, which is boiled to solution, is evaporated, then active carbon is dried, and obtain pretreated active carbon；Pretreated active carbon is added in the solution of ascorbic acid again, stand certain time after heating reaction under normal temperature conditions again under vacuum conditions and takes out active carbon；Then the active carbon of taking-up is heated under vacuum conditions and is solidified, the active carbon loading silver after being solidified；The active carbon loading silver after solidification is finally obtained into active carbon loading silver using drying after deionized water cleaning.Method provided by the invention can significantly improve the load silver combination effect of active carbon.
Description
Technical field
The invention belongs to active carbon preparation technical fields, and in particular to a kind of preparation method of active carbon loading silver.
Background technique
Active carbon has many advantages, such as that adsorption capacity is big as adsorbent, it is antiacid it is alkaline-resisting, chemical stability is good, parsing is easy.
Suction-operated is concentration process of the dissolved impurity on activated carbon grain surface in water, so the specific surface area size of active carbon is shadow
An important factor for ringing absorption property, active carbon possesses huge specific surface area, shows good absorption property.Normal activated carbon
Water purifier under normal operation purifying water body for a period of time after, the certain micro-organisms being adsorbed on activated carbon surface is (as thin in nitrified
Bacterium) nitrite can be converted by the ammonia in water, cause nitrite concentration in water to increase, secondary pollution is caused to water body.It is single
Matter silver, which has, inhibits bacterium and bactericidal effect, therefore, the addition elemental silver of active carbon surface can peculiar smell in Adsorption water,
Foreign odor and trace toxic harmful substance, while elemental silver can eliminate drinking water deep on activated carbon surface or in duct
Secondary pollution brought by microbial reproduction in purification process increases antibacterial and sterilizing ability.Active carbon loading silver has obtained at present
Preferable application is arrived, but the preparation method of active carbon loading silver is relatively simple at present, while with respect to silver carrying amount and carrying silver
Bond strength is poor.
Summary of the invention
A kind of preparation method of active carbon loading silver is provided it is an object of the present invention to solve the above the deficiencies in the prior art, is mentioned
High silver supported bond strength.
Technical scheme is as follows:
A kind of preparation method of active carbon loading silver, comprising the following steps:
Step 1, active carbon is immersed in silver nitrate solution, stands 2-3 hours, then heating, which is boiled to solution, is evaporated, then will live
Property charcoal drying, obtain pretreated active carbon；
Step 2, pretreated active carbon is added in the solution of ascorbic acid, heating reaction 1-2 is small under vacuum conditions
When, 3-5 hours then are stood under normal temperature conditions again, active carbon is taken out；
Step 3, the active carbon that step 2 is taken out is heated to 200-300 DEG C under vacuum conditions to solidify, after being solidified
Active carbon loading silver；
Step 4, the active carbon loading silver after solidification is obtained into active carbon loading silver using drying after deionized water cleaning.
The preparation method of the active carbon loading silver, the concentration of silver nitrate solution is 2-2.5mol/L in step 1.
The preparation method of the active carbon loading silver, the amount that active carbon is added in step 1 is can just be completely into nitric acid
Silver-colored solution.
The preparation method of the active carbon loading silver, it is with 3-5 DEG C/min of heating that the process boiled is heated in step 1
Speed carries out being heated to boiling.
The temperature of active carbon drying is 60 DEG C in step 1, in vacuum condition by the preparation method of the active carbon loading silver
Lower drying.
The preparation method of the active carbon loading silver, the concentration of ascorbic acid solution is 2.5-3mol/L in step 2.
The preparation method of the active carbon loading silver, the vacuum degree of vacuum condition is 0.03-0.06MPa in step 2.
The preparation method of the active carbon loading silver, the vacuum degree of vacuum condition is 0.04-0.08MPa in step 3.
The preparation method of the active carbon loading silver, the cured time is 2-3 hours in step 3.
Active carbon is first immersed in silver nitrate solution, passes through dipping by the preparation method of active carbon loading silver provided by the invention
And the mode that heating is boiled, the nitric acid silver ion for being are combined well in the pore structure of active carbon, then pass through work
Property charcoal be added in ascorbic acid solution and reacted, generate silver ion, due to silver ion in pre-processing preferably
It is adsorbed on active carbon pore interior, therefore, during the reaction, the silver of precipitation is easier to be formed in activated carbon surface, and leads to
Cross be added excessive ascorbic acid make silver ion total overall reaction be precipitated, then by the active carbon of Ag-bearing pass through elevated temperature in vacuo
Lower solidification is further promoted so that carrying silver-colored effect, greatly enhances the combination degree of active carbon and silver.
By test comparison, the silver carrying amount for the active carbon loading silver that method provided by the invention is prepared is compared to reference examples
It compares, silver carrying amount improves the active carbon loading silver that (embodiment 4) obtains by means of the present invention than reference examples under the same conditions
18%, show method provided by the invention can silver preferably with active carbon in conjunction with, raising combination degree enhances simultaneously
Carry silver-colored effect.
Specific embodiment
Embodiment 1
A kind of preparation method of active carbon loading silver, comprising the following steps:
Step 1, active carbon is immersed in silver nitrate solution, stands 2 hours, then heating, which is boiled to solution, is evaporated, then will be active
Charcoal drying obtains pretreated active carbon, and the concentration of the above silver nitrate solution is 2mol/L, and the amount that active carbon is added is just
It can be 60 DEG C completely into silver nitrate solution, the temperature of active carbon drying, dry under vacuum conditions；
Step 2, pretreated active carbon is added in the solution of ascorbic acid, the concentration of ascorbic acid solution is
2.5mol/L reacts 1 hour in the heated under vacuum that vacuum degree is 0.03MPa, it is small then to stand 3 under normal temperature conditions again
When, active carbon is taken out；
Step 3, active carbon that step 2 is taken out is consolidated in the heated under vacuum that vacuum degree is 0.04MPa to 200 DEG C
Change, the cured time is 2 hours, the active carbon loading silver after being solidified；
Step 4, the active carbon loading silver after solidification is obtained into active carbon loading silver using drying after deionized water cleaning.
Embodiment 2
A kind of preparation method of active carbon loading silver, comprising the following steps:
Step 1, active carbon is immersed in silver nitrate solution, stands 2 hours, then heating, which is boiled to solution, is evaporated, then will be active
Charcoal drying obtains pretreated active carbon, and the concentration of the above silver nitrate solution is 2.2mol/L, and the amount that active carbon is added is rigid
It can be well 60 DEG C completely into silver nitrate solution, the temperature of active carbon drying, dry under vacuum conditions, heat the process boiled
To carry out being heated to boiling with 3-5 DEG C/min of heating rate；
Step 2, pretreated active carbon is added in the solution of ascorbic acid, the concentration of ascorbic acid solution is
2.6mol/L reacts 2 hours in the heated under vacuum that vacuum degree is 0.04MPa, it is small then to stand 4 under normal temperature conditions again
When, active carbon is taken out；
Step 3, active carbon that step 2 is taken out is consolidated in the heated under vacuum that vacuum degree is 0.05MPa to 230 DEG C
Change, the cured time is 2 hours, the active carbon loading silver after being solidified；
Step 4, the active carbon loading silver after solidification is obtained into active carbon loading silver using drying after deionized water cleaning.
Embodiment 3
A kind of preparation method of active carbon loading silver, comprising the following steps:
Step 1, active carbon is immersed in silver nitrate solution, stands 3 hours, then heating, which is boiled to solution, is evaporated, then will be active
Charcoal drying obtains pretreated active carbon, and the concentration of the above silver nitrate solution is 2.4mol/L, and the amount that active carbon is added is rigid
It can be well 60 DEG C completely into silver nitrate solution, the temperature of active carbon drying, dry under vacuum conditions, heat the process boiled
To carry out being heated to boiling with 3-5 DEG C/min of heating rate；
Step 2, pretreated active carbon is added in the solution of ascorbic acid, the concentration of ascorbic acid solution is
2.7mol/L reacts 2 hours in the heated under vacuum that vacuum degree is 0.05MPa, it is small then to stand 4 under normal temperature conditions again
When, active carbon is taken out；
Step 3, active carbon that step 2 is taken out is consolidated in the heated under vacuum that vacuum degree is 0.06MPa to 250 DEG C
Change, the cured time is 3 hours, the active carbon loading silver after being solidified；
Step 4, the active carbon loading silver after solidification is obtained into active carbon loading silver using drying after deionized water cleaning.
Embodiment 4
A kind of preparation method of active carbon loading silver, comprising the following steps:
Step 1, active carbon is immersed in silver nitrate solution, stands 3 hours, then heating, which is boiled to solution, is evaporated, then will be active
Charcoal drying obtains pretreated active carbon, and the concentration of the above silver nitrate solution is 2.5mol/L, and the amount that active carbon is added is rigid
It can be well 60 DEG C completely into silver nitrate solution, the temperature of active carbon drying, dry under vacuum conditions, heat the process boiled
To carry out being heated to boiling with 3-5 DEG C/min of heating rate；
Step 2, pretreated active carbon is added in the solution of ascorbic acid, the concentration of ascorbic acid solution is
2.8mol/L reacts 2 hours in the heated under vacuum that vacuum degree is 0.04MPa, it is small then to stand 5 under normal temperature conditions again
When, active carbon is taken out；
Step 3, active carbon that step 2 is taken out is consolidated in the heated under vacuum that vacuum degree is 0.07MPa to 280 DEG C
Change, the cured time is 3 hours, the active carbon loading silver after being solidified；
Step 4, the active carbon loading silver after solidification is obtained into active carbon loading silver using drying after deionized water cleaning.
Embodiment 5
A kind of preparation method of active carbon loading silver, comprising the following steps:
Step 1, active carbon is immersed in silver nitrate solution, stands 3 hours, then heating, which is boiled to solution, is evaporated, then will be active
Charcoal drying obtains pretreated active carbon, and the concentration of the above silver nitrate solution is 2.5mol/L, and the amount that active carbon is added is rigid
It can be well 60 DEG C completely into silver nitrate solution, the temperature of active carbon drying, dry under vacuum conditions, heat the process boiled
To carry out being heated to boiling with 3-5 DEG C/min of heating rate；
Step 2, pretreated active carbon is added in the solution of ascorbic acid, the concentration of ascorbic acid solution is 3mol/
L reacts 2 hours in the heated under vacuum that vacuum degree is 0.06MPa, then stands 5 hours under normal temperature conditions again, will live
Property charcoal take out；
Step 3, active carbon that step 2 is taken out is consolidated in the heated under vacuum that vacuum degree is 0.08MPa to 300 DEG C
Change, the cured time is 3 hours, the active carbon loading silver after being solidified；
Step 4, the active carbon loading silver after solidification is obtained into active carbon loading silver using drying after deionized water cleaning.
Reference examples
A kind of preparation method of active carbon loading silver, comprising the following steps:
Step 1, active carbon is immersed in silver nitrate solution, stands 3 hours, ascorbic acid solution, silver nitrate solution is then added
Concentration be 2.5mol/L, the concentration of ascorbic acid solution is 2.8mol/L, in the case where vacuum degree is the vacuum condition of 0.04MPa plus
Thermal response 2 hours, 5 hours then are stood under normal temperature conditions again, active carbon is taken out；
Step 2, active carbon that step 2 is taken out is consolidated in the heated under vacuum that vacuum degree is 0.07MPa to 280 DEG C
Change, the cured time is 3 hours, the active carbon loading silver after being solidified；
Step 3, the active carbon loading silver after solidification is obtained into active carbon loading silver using drying after deionized water cleaning.
Active carbon is first immersed in silver nitrate solution, passes through dipping by the preparation method of active carbon loading silver provided by the invention
And the mode that heating is boiled, the nitric acid silver ion for being are combined well in the pore structure of active carbon, then pass through work
Property charcoal be added in ascorbic acid solution and reacted, generate silver ion, due to silver ion in pre-processing preferably
It is adsorbed on active carbon pore interior, therefore, during the reaction, the silver of precipitation is easier to be formed in activated carbon surface, and leads to
Cross be added excessive ascorbic acid make silver ion total overall reaction be precipitated, then by the active carbon of Ag-bearing pass through elevated temperature in vacuo
Lower solidification is further promoted so that carrying silver-colored effect, greatly enhances the combination degree of active carbon and silver.
By test comparison, the silver carrying amount for the active carbon loading silver that method provided by the invention is prepared is compared to reference examples
It compares, silver carrying amount improves the active carbon loading silver that (embodiment 4) obtains by means of the present invention than reference examples under the same conditions
18%, show method provided by the invention can silver preferably with active carbon in conjunction with, raising combination degree enhances simultaneously
Carry silver-colored effect.
Claims (9)
1. a kind of preparation method of active carbon loading silver, which comprises the following steps:
Step 1, active carbon is immersed in silver nitrate solution, stands 2-3 hours, then heating, which is boiled to solution, is evaporated, then will live
Property charcoal drying, obtain pretreated active carbon；
Step 2, pretreated active carbon is added in the solution of ascorbic acid, heating reaction 1-2 is small under vacuum conditions
When, 3-5 hours then are stood under normal temperature conditions again, active carbon is taken out；
Step 3, the active carbon that step 2 is taken out is heated to 200-300 DEG C under vacuum conditions to solidify, after being solidified
Active carbon loading silver；
Step 4, the active carbon loading silver after solidification is obtained into active carbon loading silver using drying after deionized water cleaning.
2. the preparation method of active carbon loading silver according to claim 1, which is characterized in that silver nitrate solution in step 1
Concentration is 2-2.5mol/L.
3. the preparation method of active carbon loading silver according to claim 1, which is characterized in that active carbon is added in step 1
Amount is can just be completely into silver nitrate solution.
4. the preparation method of active carbon loading silver according to claim 1, which is characterized in that heat the mistake boiled in step 1
Journey is to carry out being heated to boiling with 3-5 DEG C/min of heating rate.
5. the preparation method of active carbon loading silver according to claim 1, which is characterized in that dry active carbon in step 1
Temperature be 60 DEG C, dry under vacuum conditions.
6. the preparation method of active carbon loading silver according to claim 1, which is characterized in that ascorbic acid solution in step 2
Concentration be 2.5-3mol/L.
7. the preparation method of active carbon loading silver according to claim 1, which is characterized in that vacuum condition is true in step 2
Reciprocal of duty cycle is 0.03-0.06MPa.
8. the preparation method of active carbon loading silver according to claim 1, which is characterized in that vacuum condition is true in step 3
Reciprocal of duty cycle is 0.04-0.08MPa.
9. the preparation method of active carbon loading silver according to claim 1, which is characterized in that the cured time is in step 3
2-3 hours.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111841496A (en) * | 2020-07-24 | 2020-10-30 | 泉州南京大学环保产业研究院 | Method for rapidly preparing silver-loaded activated carbon |
| CN111908470A (en) * | 2020-08-14 | 2020-11-10 | 扬州工业职业技术学院 | Preparation method of antibacterial silver-loaded activated carbon |
| CN112263991A (en) * | 2020-10-12 | 2021-01-26 | 中国矿业大学(北京) | Preparation method of silver modified activated carbon and method for removing benzo (a) pyrene in water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111841496A (en) * | 2020-07-24 | 2020-10-30 | 泉州南京大学环保产业研究院 | Method for rapidly preparing silver-loaded activated carbon |
| CN111908470A (en) * | 2020-08-14 | 2020-11-10 | 扬州工业职业技术学院 | Preparation method of antibacterial silver-loaded activated carbon |
| CN112263991A (en) * | 2020-10-12 | 2021-01-26 | 中国矿业大学(北京) | Preparation method of silver modified activated carbon and method for removing benzo (a) pyrene in water |
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Application publication date: 20190129 |