CN102908990A - Preparation method of silver-loaded activated carbon - Google Patents
Preparation method of silver-loaded activated carbon Download PDFInfo
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- CN102908990A CN102908990A CN2012103889066A CN201210388906A CN102908990A CN 102908990 A CN102908990 A CN 102908990A CN 2012103889066 A CN2012103889066 A CN 2012103889066A CN 201210388906 A CN201210388906 A CN 201210388906A CN 102908990 A CN102908990 A CN 102908990A
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Abstract
The invention discloses a preparation method of silver-loaded activated carbon, which comprises the steps that raw carbon is washed with dilute nitric acid and then with clear water, the carbon is immersed into a silver nitrate aqueous solution and dried after being soaked, a reduction solution is prepared with ammonia water and organic acid, the dried carbon is poured into the reduction solution for stirring, wet silver-loaded activated carbon is obtained after cooling, and the silver-loaded activated carbon is obtained after drying. According to the preparation method, as the raw carbon is washed with the dilute nitric acid and then with the clear water, impurity elements on an inside wall of a raw material to be loaded with silver are removed, so that silver ions can enter the porous inside wall of the raw activated carbon smoothly. With the adoption of the reductant prepared by the ammonia water and the organic acid, the silver ions are reduced to element silver, and the element silver is firmly adsorbed into the internal pores of the activated carbon, and completely loaded into the activated carbon. The preparation method has the advantages that no pollution is caused, the price is low, the preparation method is feasible and the cost is low. The silver-loaded activated carbon prepared by the method can effectively sterilize drinking water in the purification process, and ensures that silver in the water is not over proof. In addition, the activated carbon has a long service life.
Description
Technical field
The invention belongs to the activated carbon technology field, be specifically related to a kind of preparation method of new active carbon loading silver.
Background technology
The method of active carbon loading silver in the past uses the raw material charcoal directly to soak silver nitrate at first, uses after the oven dry, and silver ion easily enters and flows out in the water and surpass sanitary standard for drinking water, and the life-span is short.Also useful clear water washing material charcoal, soak silver nitrate, low with HCL reduction, this method silver utilization ratio, can contain CL in the water outlet and exceed standard.Have again method relatively more expensive with KI reduction, KI, increase cost.Also have report to make globular silver carried carbon aerogel particle with expensive gel method, can't realize commercialization.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method of new active carbon loading silver, can be used for the water purification field.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of preparation method of active carbon loading silver, it comprises the steps:
(1) with rare nitric acid washing material charcoal, washs with clear water again; By this step the raw material inwall impurity element that needs to carry silver is removed, so that silver ion enters on the raw material active carbon hole inwall smoothly.
(2) charcoal that step (1) is obtained immerses in the silver nitrate aqueous solution, soaks after 12 ~ 48 hours oven dry.
(3) ammoniacal liquor and organic acid are prepared reducing solution by weight 4:1.
(4) stirred 2 ~ 4 hours in the reducing solution with charcoal impouring step (3) preparation after step (2) oven dry, be wet active carbon loading silver after the cooling, dry and get final product.Can reduce silver ion by this step becomes element state silver, firmly is attached on the active carbon inner pore, has effectively avoided silver particles namely to flow in the water body in a short time.
In the step (1), described raw material charcoal is the active carbon by coconut husk, almond or the preparation of other nut fruits nucleocapsid, the described raw material charcoal I that need meet the following conditions
2Adsorptive value 〉=950mg/g, methylene blue adsorption value 10 ~ 18mL(press GB11496-and measure).
In the step (1), described rare concentration of nitric acid is 1 ~ 1.5wt%.
In the step (2), described silver nitrate aqueous solution concentration is 7g/L.
In the step (2), the mass ratio of silver element and raw material charcoal is 5:1000.
In step (2) and (4), bake out temperature is 80 ℃ ~ 100 ℃.
In the step (3), described ammonia concn is more than the 30wt%.
In the step (3), described organic acid is formic acid or acetic acid.
In the step (4), for every 1g charcoal, the volumetric usage of reducing solution is 1 ~ 2mL.
Beneficial effect: the preparation method of active carbon loading silver of the present invention, use first rare nitric acid washing material charcoal, with the clear water washing, the raw material inwall impurity element that needs to carry silver is removed, so that silver ion enters on the raw material active carbon hole inwall smoothly again.Making silver ion reduction by the reducing agent that has used ammoniacal liquor and organic acid to cooperate is element state silver, and firmly is attached in the internal void of active carbon, and silver all is loaded in the charcoal, have simultaneously pollution-free, price is low, the preparation method is feasible, the advantage that cost is not high.The active carbon loading silver that the inventive method makes has reached effectively sterilization in the drink water purifying process, be unlikely again that silver is above standard＜drinking water sanitary standard〉in the water (standard GB/T 5749-2006 setting-0.05mg/L), and the active carbon long service life.
The specific embodiment
According to following embodiment, the present invention may be better understood.Yet, those skilled in the art will readily understand that the described content of embodiment only is used for explanation the present invention, and should also can not limit the present invention described in detail in claims.
Embodiment 1:
A kind of preparation method of active carbon loading silver, it comprises the steps:
(1) with the rare nitric acid washing material of 1wt% charcoal, the mixing quality of raw material charcoal and rare nitric acid can suitably add thermal agitation 1 hour than for 1:3, and disacidify liquid inclines; With the clear water washing, the mass ratio of raw material charcoal and clear water is 1:1, can suitably add thermal agitation 1 hour again, and the washings that incline drain; By this step the raw material inwall impurity element that needs to carry silver is removed, so that silver ion enters on the raw material active carbon hole inwall smoothly.
(2) charcoal that step (1) is obtained immerses in the 7g/L silver nitrate aqueous solution, and the mass ratio of silver element and raw material charcoal is 5:1000, soaks after 12 hours 80 ℃ of oven dry.
(3) 30wt% ammoniacal liquor and formic acid are prepared reducing solution by weight 4:1.
(4) will stir 2 hours in the reducing solution of the preparation of the charcoal impouring step (3) after step (2) oven dry, for every 1g charcoal, the volumetric usage of reducing solution is 1mL, is wet active carbon loading silver after the cooling, 80 ℃ of oven dry and get final product.Can reduce silver ion by this step becomes element state silver, firmly is attached on the active carbon inner pore, has effectively avoided silver particles namely to flow in the water body in a short time.
In the step (1), the described raw material charcoal I that need meet the following conditions
2Adsorptive value 〉=950mg/g, methylene blue adsorption value 10 ~ 18mL(press GB11496-and measure).
The active carbon that present embodiment makes flows out the silver ion of water all less than 0.05mg/L in the use of family expenses water purifier or pure water manufacturing, and long service life.Be widely used in drink water purifying, sterilization, except heavy metal element, harmful organic substance, the chlorine residue in anhydrating, play sterilization, antibacterial effect.Drinking water after active carbon loading silver purifies reaches national drinking water standard fully, and is capable of direct drinking.
Embodiment 2:
(1) with the rare nitric acid washing material of 1.5wt% charcoal, the mixing quality of raw material charcoal and rare nitric acid can suitably add thermal agitation 2 hours than for 1:2, and disacidify liquid inclines; With the clear water washing, the mass ratio of raw material charcoal and clear water is 1:2, can suitably add thermal agitation 1 hour again, and the washings that incline drain; By this step the raw material inwall impurity element that needs to carry silver is removed, so that silver ion enters on the raw material active carbon hole inwall smoothly.
(2) charcoal that step (1) is obtained immerses in the 7g/L silver nitrate aqueous solution, and the mass ratio of silver element and raw material charcoal is 5:1000, soaks after 48 hours 100 ℃ of oven dry.
(3) 34.7wt% ammoniacal liquor and formic acid are prepared reducing solution by weight 4:1.
(4) will stir 4 hours in the reducing solution of the preparation of the charcoal impouring step (3) after step (2) oven dry, for every 1g charcoal, the volumetric usage of reducing solution is 2mL, is wet active carbon loading silver after the cooling, 100 ℃ of oven dry and get final product.Can reduce silver ion by this step becomes element state silver, firmly is attached on the active carbon inner pore, has effectively avoided silver particles namely to flow in the water body in a short time.
In the step (1), the described raw material charcoal I that need meet the following conditions
2Adsorptive value 〉=950mg/g, methylene blue adsorption value 10 ~ 18mL(press GB11496-and measure).
The active carbon that present embodiment makes flows out the silver ion of water all less than 0.05mg/L in the use of family expenses water purifier or pure water manufacturing, and long service life.Be widely used in drink water purifying, sterilization, except heavy metal element, harmful organic substance, the chlorine residue in anhydrating, play sterilization, antibacterial effect.Drinking water after active carbon loading silver purifies reaches national drinking water standard fully, and is capable of direct drinking.
Claims (9)
1. the preparation method of an active carbon loading silver is characterized in that, it comprises the steps:
(1) with rare nitric acid washing material charcoal, washs with clear water again;
(2) charcoal that step (1) is obtained immerses in the silver nitrate aqueous solution, soaks after 12 ~ 48 hours oven dry;
(3) ammoniacal liquor and organic acid are prepared reducing solution by weight 4:1;
(4) stirred 2 ~ 4 hours in the reducing solution with charcoal impouring step (3) preparation after step (2) oven dry, be wet active carbon loading silver after the cooling, dry and get final product.
2. the preparation method of active carbon loading silver according to claim 1 is characterized in that, in the step (1), described raw material charcoal is the active carbon by coconut husk, almond or the preparation of other nut fruits nucleocapsid.
3. the preparation method of active carbon loading silver according to claim 1 is characterized in that, in the step (1), described rare concentration of nitric acid is 1 ~ 1.5wt%.
4. the preparation method of active carbon loading silver according to claim 1 is characterized in that, in the step (2), described silver nitrate aqueous solution concentration is 7g/L.
5. the preparation method of active carbon loading silver according to claim 1 is characterized in that, in the step (2), the mass ratio of silver element and raw material charcoal is 5:1000.
6. the preparation method of active carbon loading silver according to claim 1 is characterized in that, in step (2) and (4), bake out temperature is 80 ℃ ~ 100 ℃.
7. the preparation method of active carbon loading silver according to claim 1 is characterized in that, in the step (3), described ammonia concn is more than the 30wt%.
8. the preparation method of active carbon loading silver according to claim 1 is characterized in that, in the step (3), described organic acid is formic acid or acetic acid.
9. the preparation method of active carbon loading silver according to claim 1 is characterized in that, in the step (4), for every 1g charcoal, the volumetric usage of reducing solution is 1 ~ 2mL.
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| CN2012103889066A CN102908990A (en) | 2012-10-15 | 2012-10-15 | Preparation method of silver-loaded activated carbon |
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| CN2012103889066A CN102908990A (en) | 2012-10-15 | 2012-10-15 | Preparation method of silver-loaded activated carbon |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103392782A (en) * | 2013-07-04 | 2013-11-20 | 南京大学 | Agricultural technology physical combination fresh-keeping and storing method for juicy peaches |
| CN103432991A (en) * | 2013-08-14 | 2013-12-11 | 刘大敏 | Nano-silver honeycomb-type purification activated carbon and preparation method thereof |
| CN104069808A (en) * | 2014-06-20 | 2014-10-01 | 江苏浦士达环保科技有限公司 | Manufacturing method of silver-carrying coconut shell activated carbon |
| CN105217749A (en) * | 2015-07-03 | 2016-01-06 | 何素梅 | Absorption carrier of a kind of loading nano silvery and preparation method thereof |
| CN105233796A (en) * | 2015-10-30 | 2016-01-13 | 王立鑫 | Composite material based on silver-loading activated carbon, and preparation method and application thereof |
| CN105268404A (en) * | 2015-10-30 | 2016-01-27 | 安徽炭之馨环保科技有限公司 | Novel composite material of activated carbon for water quality purification and preparation method thereof |
| CN105396554A (en) * | 2015-10-30 | 2016-03-16 | 明光市龙腾矿物有限公司 | Acidized silver loaded activated carbon-based composite material and preparation method thereof |
| CN106698616A (en) * | 2016-12-18 | 2017-05-24 | 中南大学 | Method for reduction preparation of silver loaded activated carbon from citric acid |
| CN107445338A (en) * | 2017-08-21 | 2017-12-08 | 浙江爱彼环保科技有限公司 | High efficiency water purification catridge |
| CN107761124A (en) * | 2017-10-23 | 2018-03-06 | 大连理工大学 | A kind of preparation method and application for carrying silver-colored carbon aerogels |
| CN108249437A (en) * | 2018-02-12 | 2018-07-06 | 西安工程大学 | A kind of preparation method of active carbon loading silver |
| CN108404861A (en) * | 2018-02-12 | 2018-08-17 | 西安工程大学 | A kind of preparation method carrying nano-divalent silver activated carbon |
| CN109279675A (en) * | 2018-09-30 | 2019-01-29 | 江苏斯沃得环保科技有限公司 | A kind of preparation method of active carbon loading silver |
| CN109432480A (en) * | 2018-12-05 | 2019-03-08 | 大连大学 | A kind of wet active carbon loading silver fiber dressing of long acting antibiotic control and preparation method thereof |
| CN110550709A (en) * | 2019-08-29 | 2019-12-10 | 重庆大学 | Bactericidal biochar loaded with silver particles and preparation method thereof |
| 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 |
| 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 |
-
2012
- 2012-10-15 CN CN2012103889066A patent/CN102908990A/en active Pending
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| 刘文宏等: "不同温度下HNO3改性对活性炭吸附银的影响", 《中国有色金属学报》 * |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103392782B (en) * | 2013-07-04 | 2014-08-20 | 南京大学 | Agricultural technology physical combination fresh-keeping and storing method for juicy peaches |
| CN103392782A (en) * | 2013-07-04 | 2013-11-20 | 南京大学 | Agricultural technology physical combination fresh-keeping and storing method for juicy peaches |
| CN103432991A (en) * | 2013-08-14 | 2013-12-11 | 刘大敏 | Nano-silver honeycomb-type purification activated carbon and preparation method thereof |
| CN103432991B (en) * | 2013-08-14 | 2015-12-23 | 刘大敏 | Nano Silver honeycomb type purification activated carbon and preparation method thereof |
| CN104069808A (en) * | 2014-06-20 | 2014-10-01 | 江苏浦士达环保科技有限公司 | Manufacturing method of silver-carrying coconut shell activated carbon |
| CN105217749B (en) * | 2015-07-03 | 2018-03-13 | 何素梅 | A kind of absorption carrier of loading nano silvery and preparation method thereof |
| CN105217749A (en) * | 2015-07-03 | 2016-01-06 | 何素梅 | Absorption carrier of a kind of loading nano silvery and preparation method thereof |
| CN105233796A (en) * | 2015-10-30 | 2016-01-13 | 王立鑫 | Composite material based on silver-loading activated carbon, and preparation method and application thereof |
| CN105268404A (en) * | 2015-10-30 | 2016-01-27 | 安徽炭之馨环保科技有限公司 | Novel composite material of activated carbon for water quality purification and preparation method thereof |
| CN105396554A (en) * | 2015-10-30 | 2016-03-16 | 明光市龙腾矿物有限公司 | Acidized silver loaded activated carbon-based composite material and preparation method thereof |
| CN106698616A (en) * | 2016-12-18 | 2017-05-24 | 中南大学 | Method for reduction preparation of silver loaded activated carbon from citric acid |
| CN106698616B (en) * | 2016-12-18 | 2019-04-16 | 中南大学 | A kind of method that citric acid reduction prepares active carbon loading silver |
| CN107445338B (en) * | 2017-08-21 | 2020-11-06 | 浙江爱彼环保科技有限公司 | High-efficiency water purification filter element |
| CN107445338A (en) * | 2017-08-21 | 2017-12-08 | 浙江爱彼环保科技有限公司 | High efficiency water purification catridge |
| CN107761124A (en) * | 2017-10-23 | 2018-03-06 | 大连理工大学 | A kind of preparation method and application for carrying silver-colored carbon aerogels |
| CN107761124B (en) * | 2017-10-23 | 2019-06-07 | 大连理工大学 | A kind of preparation method and application carrying silver-colored carbon aerogels |
| CN108249437A (en) * | 2018-02-12 | 2018-07-06 | 西安工程大学 | A kind of preparation method of active carbon loading silver |
| CN108404861A (en) * | 2018-02-12 | 2018-08-17 | 西安工程大学 | A kind of preparation method carrying nano-divalent silver activated carbon |
| CN109279675A (en) * | 2018-09-30 | 2019-01-29 | 江苏斯沃得环保科技有限公司 | A kind of preparation method of active carbon loading silver |
| CN109432480A (en) * | 2018-12-05 | 2019-03-08 | 大连大学 | A kind of wet active carbon loading silver fiber dressing of long acting antibiotic control and preparation method thereof |
| CN110550709A (en) * | 2019-08-29 | 2019-12-10 | 重庆大学 | Bactericidal biochar loaded with silver particles and preparation method thereof |
| CN110550709B (en) * | 2019-08-29 | 2022-02-11 | 重庆大学 | Bactericidal biochar loaded with silver particles and preparation method thereof |
| 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 |
| 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: 20130206 |