CN106607007A - Preparation method for MgO loaded china-hemp stalk activated carbon - Google Patents
Preparation method for MgO loaded china-hemp stalk activated carbon Download PDFInfo
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- CN106607007A CN106607007A CN201510680420.3A CN201510680420A CN106607007A CN 106607007 A CN106607007 A CN 106607007A CN 201510680420 A CN201510680420 A CN 201510680420A CN 106607007 A CN106607007 A CN 106607007A
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- activated carbon
- fructus cannabis
- mgo
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Abstract
The invention provides a preparation method for MgO loaded china-hemp stalk activated carbon. With china-hemp stalks as a raw material, the nano MgO loaded china-hemp stalk activated carbon having rich micropore structure and large specific surface area is prepared by a KOH activation method. After the KOH activation, the prepared china-hemp stalk activated carbon well inherits the pore structure of a precursor. At the same time, the china-hemp stalks are used as a carrier, so the problem of difficult recovery after nano MgO is used can be solved, the specific surface area of nano MgO is increased, the reaction activity is increased, and activated carbon as a carrier is combined with the performance of catalytic degradation of MgO. On one hand, good adsorption properties of activated carbon on wastewater, dyes and the like are used, on the other hand, MgO is used for complete degradation of pollutants, and the efficiency of adsorption and degradation of the pollutants is greatly increased.
Description
Technical field
The present invention relates to a kind of MgO loads the preparation method of Fructus Cannabis stalk activated carbon, belong to the technical field of activated carbon manufacture and modified aspect.Additionally,
Also relate to the recycling treatment of solid waste in industrial and agricultural production.
Background technology
Fructus Cannabis are the herbaceous plant that a class has natural fibre construction, and the plant growing cycle is shorter, stronger to the adaptability of environment, south China
Regional plantation amount is larger.At present for the main application of Fructus Cannabis or using its phloem fiber manufacturing textile, and it is overall big for plant is accounted for
About 80% Fructus Cannabis stalk is not but fully utilized, therefore to a great extent, causes the waste of resource.The constituent of Fructus Cannabis stalk and structure
It is similar to common wood, wherein containing the pore structure of cellulose, hemicellulose, lignin and prosperity.Meanwhile, Fructus Cannabis stalk material has day
Right nano micropore structure, this structure can be preserved after carbonization, therefore are prepared rich in the splendid of a large amount of microporous activated Carbon Materials
Raw material.
Nano magnesia is the critical function material for being widely used in the fields such as the improvement of toxic waste, catalysis, antibacterial, its surface exist a large amount of defects,
Side, angle, step isoreactivity position allow which as adsorbent, adsorb harmful gass or remove harmful metal ion in eliminating water.Nano oxidized magnesium raw material
Low cost, preparation technology are easy, and the catalytic degradation process of the important point nano magnesia does not need light to excite, need not rely on ultraviolet light light
According to, therefore nano magnesia is a kind of nano anti-biotic material being most widely used.If nano magnesia is carried on activated carbon, then its ratio
Surface area will be higher, and chemical property also further can be lifted, so the preparation of the activated carbon supported type catalyst of nano magnesia and property in recent years
The emphasis for becoming domestic and international research can be tested.
Activated carbon as a kind of common adsorbing material, with cheap, pore structure it is flourishing, specific surface area is big, absorbability relatively strong and machine
The advantages of tool intensity is reliable.Fructus Cannabis stalk is a kind of agricultural crop straw with natural void structure, after KOH activation, the Fructus Cannabis being prepared from
Stalk activated carbon inherits the aperture structure of presoma well.Using Fructus Cannabis stalk activated carbon as carrier, nano magnesia use can be solved well
The problem of the recovery difficulty for occurring afterwards, and the specific surface area of nano magnesia is improve, so as to improve reactivity.
The content of the invention
The purpose of the present invention aims to the deficiencies in the prior art, there is provided a kind of MgO loads the preparation method of Fructus Cannabis stalk activated carbon.The preparation method
Simple process, inexpensive, it is easy to control, and activated carbon is combined as carrier with the catalytic degradation performance of magnesium oxide, greatly improve suction
The efficiency of attached degradation of contaminant.
The technical solution adopted in the present invention is：A kind of MgO loads the preparation method of Fructus Cannabis stalk activated carbon, and which comprises the following steps that：
(1) Fructus Cannabis stalk is cut into the billet of 5～8cm length, carries out charing process in retort being placed on after being dried.Carbonization temperature is 500 DEG C,
Carbonization time is 2 hours.
(2) using pulverizer by the raw material pulverizing after carbonization into can cross 80～100 mesh sieve carbon powder.Again with potassium hydroxide as activator, will
Fructus Cannabis stalk powdered carbon impregnates 24h post-dryings in potassium hydroxide solution.
(3) sample after drying is placed in chamber type electric resistance furnace carries out activation processing, and activation temperature is 800 DEG C, and soak time is 2h.Activate it
Afterwards sample is taken out and is washed to neutral post-drying, that is, Fructus Cannabis stalk activated carbon is obtained
(4) the Fructus Cannabis stalk active carbon powder of a certain amount of 80～100 mesh is placed in certain density magnesium nitrate solution and sodium hydroxide solution and is mixed
Uniformly.
(5) sample after mix homogeneously is put in ultrasonic washing unit carries out ultrasonic wave concussion.After concussion again deionized water clean repeatedly with
Remove impurity
(6) sample after cleaning up is put in drying baker and is dried after 30min, place into calcining in chamber type electric resistance furnace, that is, obtain MgO loads
Fructus Cannabis stalk activated carbon.
In step 2, the mass ratio of potassium hydroxide and carbonized stock powder is 1～4: 1, and the concentration of potassium hydroxide solution is 50%.
In step 4, the concentration of magnesium nitrate solution is 0.2～0.6mol/L, and the concentration of sodium hydroxide solution is 0.2～0.6mol/L.
In steps of 5, the response time of ultrasonic wave concussion is 20～60min, and reaction temperature is 40～80 DEG C.
In step 6, calcining heat is 500 DEG C, and calcination time is 2h.
Compared with prior art, the present invention has advantages below and effect：
1st, with Fructus Cannabis stalk as raw material, the nano magnesia that loaded containing flourishing microcellular structure and bigger serface is prepared for by KOH activation methods
Fructus Cannabis stalk activated carbon, it is achieved thereby that the absorption degradation and the improvement and protection to environment to toxic gas and sewage.
2nd, activated carbon is combined as carrier with the catalytic degradation performance of magnesium oxide.On the one hand waste water and dyestuff etc. are had using activated carbon
On the other hand pollutant are thoroughly degraded by good absorption property using magnesium oxide, greatly improve the efficiency of absorption degradation pollutant.
3rd, the preparation method flow process is simple, and simple process, inexpensive, it is easy to control have good development prospect and further deeply expand
The value of research.
Specific embodiment
With reference to example is embodied as, the present invention is described in detail：
Embodiment 1
(1) Fructus Cannabis stalk is cut into the billet of 5～8cm length, carries out charing process in retort being placed on after being dried.Carbonization temperature is 500 DEG C,
Carbonization time is 2 hours.
(2) using pulverizer by the raw material pulverizing after carbonization into can cross 100 mesh sieve carbon powder.(the potassium hydroxide with potassium hydroxide as activator again
Mass ratio with carbonized stock powder is 4: 1, and the concentration of potassium hydroxide solution is 50%), Fructus Cannabis stalk powdered carbon to be impregnated in potassium hydroxide solution 24h
Post-drying.
(3) sample after drying is placed in chamber type electric resistance furnace carries out activation processing, and activation temperature is 800 DEG C, and soak time is 2h.Activate it
Afterwards sample is taken out and is washed to neutral post-drying, that is, Fructus Cannabis stalk activated carbon is obtained
(4) the Fructus Cannabis stalk active carbon powder of a certain amount of 100 mesh is placed in into certain density magnesium nitrate solution (concentration of magnesium nitrate solution is 0.2mol/L)
With in sodium hydroxide solution (concentration of sodium hydroxide solution be 0.4mol/L) and mix homogeneously.
(5) sample after mix homogeneously is put in ultrasonic washing unit carries out ultrasonic wave concussion.The response time of ultrasonic wave concussion is 20min, instead
Temperature is answered to be 60 DEG C.After concussion, deionized water cleans to remove impurity repeatedly again
(6) sample after cleaning up is put in drying baker and is dried after 30min, place into calcining in chamber type electric resistance furnace, calcining heat is 500 DEG C,
Calcination time is 2h.The Fructus Cannabis stalk activated carbon of MgO loads is obtained.
The Fructus Cannabis stalk activated carbon specific surface area for measuring obtained MgO loads is 1589.27m2/ g, micropore specific area are 1420.52m2/ g, micropore hole
Volume is 0.751cm3/ g, average particle diameter size are 40nm, for the degradation rate of methyl orange and paraoxon is respectively 90.32% and 94.34%.
Embodiment 2
(1) Fructus Cannabis stalk is cut into the billet of 5～8cm length, carries out charing process in retort being placed on after being dried.Carbonization temperature is 500 DEG C,
Carbonization time is 2 hours.
(2) using pulverizer by the raw material pulverizing after carbonization into can cross 80 mesh sieve carbon powder.Again with potassium hydroxide as activator (potassium hydroxide and
The mass ratio of carbonized stock powder is 3: 1, and the concentration of potassium hydroxide solution is 50%), Fructus Cannabis stalk powdered carbon to be impregnated after 24h in potassium hydroxide solution
Drying.
(3) sample after drying is placed in chamber type electric resistance furnace carries out activation processing, and activation temperature is 800 DEG C, and soak time is 2h.Activate it
Afterwards sample is taken out and is washed to neutral post-drying, that is, Fructus Cannabis stalk activated carbon is obtained
(4) the Fructus Cannabis stalk active carbon powder of a certain amount of 80 mesh is placed in into certain density magnesium nitrate solution (concentration of magnesium nitrate solution is 0.4mol/L)
With in sodium hydroxide solution (concentration of sodium hydroxide solution be 0.6mol/L) and mix homogeneously.
(5) sample after mix homogeneously is put in ultrasonic washing unit carries out ultrasonic wave concussion.The response time of ultrasonic wave concussion is 40min, instead
Temperature is answered to be 60 DEG C.After concussion, deionized water cleans to remove impurity repeatedly again
(6) sample after cleaning up is put in drying baker and is dried after 30min, place into calcining in chamber type electric resistance furnace, calcining heat is 500 DEG C,
Calcination time is 2h.The Fructus Cannabis stalk activated carbon of MgO loads is obtained.
The Fructus Cannabis stalk activated carbon specific surface area for measuring obtained MgO loads is 1275.08m2/ g, micropore specific area are 1188.75m2/ g, micropore hole
Volume is 0.630cm3/ g, average particle diameter size are 50nm, for the degradation rate of methyl orange and paraoxon is respectively 88.65% and 91.23%.
Claims (4)
1. a kind of MgO loads the preparation method of Fructus Cannabis stalk activated carbon, it is characterised in that including following several steps：
(1) Fructus Cannabis stalk being cut into the billet of 5～8cm length, charing process being carried out in retort being placed on after being dried, carbonization temperature is 500 DEG C,
Carbonization time is 2 hours；
(2) using pulverizer by the raw material pulverizing after carbonization into the carbon powder that can cross 80～100 mesh sieve, the then (hydrogen with potassium hydroxide as activator
The mass ratio of potassium oxide and carbonized stock powder is 1～4: 1, and the concentration of potassium hydroxide solution is 50%), by Fructus Cannabis stalk powdered carbon in potassium hydroxide solution
Dipping 24h post-dryings；
(3) sample after drying is placed in chamber type electric resistance furnace carries out activation processing, and activation temperature is 800 DEG C, and soak time is 2h, activates it
Afterwards sample is taken out and is washed to neutral post-drying, that is, Fructus Cannabis stalk activated carbon is obtained；
(4) the Fructus Cannabis stalk active carbon powder of a certain amount of 80～100 mesh is placed in certain density magnesium nitrate solution and sodium hydroxide solution and is mixed
Uniformly；
(5) sample after mix homogeneously is put in ultrasonic washing unit carries out ultrasonic wave concussion, after concussion again deionized water clean repeatedly with
Remove impurity；
(6) sample after cleaning up is put in drying baker and is dried after 30min, place into calcining in chamber type electric resistance furnace, that is, obtain MgO loads
Fructus Cannabis stalk activated carbon.
2. a kind of MgO according to claim 1 loads the preparation method of Fructus Cannabis stalk activated carbon, it is characterised in that in the step (4),
The concentration of magnesium nitrate solution is 0.2～0.6mol/L, and the concentration of sodium hydroxide solution is 0.2～0.6mol/L.
3. a kind of MgO according to claim 1 loads the preparation method of Fructus Cannabis stalk activated carbon, it is characterised in that in the step (5),
The response time of ultrasonic wave concussion is 20～60min, and reaction temperature is 40～80 DEG C.
4. a kind of MgO according to claim 1 loads the preparation method of Fructus Cannabis stalk activated carbon, it is characterised in that in the step (6),
Calcining heat is 500 DEG C, and calcination time is 2h.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107416828A (en) * | 2017-08-31 | 2017-12-01 | 贺守印 | A kind of preparation method of magnesium oxide-based activated carbon |
| CN109534339A (en) * | 2018-11-21 | 2019-03-29 | 常熟理工学院 | It is a kind of pine squama matrix activated carbon and its nanocomposite preparation method |
| CN110652961A (en) * | 2019-10-08 | 2020-01-07 | 安徽建筑大学 | Preparation method of magnesium oxide porous nano material loaded activated carbon fiber felt |
| CN111495322A (en) * | 2020-04-28 | 2020-08-07 | 海南省农业科学院农产品加工设计研究所 | Rambutan peel modified charcoal and preparation method and application thereof |
| CN111939872A (en) * | 2020-08-12 | 2020-11-17 | 华南农业大学 | Preparation method and application of activated hemp carbon adsorbent |
| CN112456521A (en) * | 2020-11-07 | 2021-03-09 | 宝鸡文理学院 | Method for preparing porous nano magnesium oxide by using corn straw template method and application thereof |
| CN112755961A (en) * | 2020-12-31 | 2021-05-07 | 中国科学院城市环境研究所 | MgO-loaded activated carbon and preparation method and application thereof |
| CN113209937A (en) * | 2018-09-14 | 2021-08-06 | 蚌埠越昇科技服务有限公司 | Method for preparing nano metal oxide loaded active carbon and application thereof |
| CN113578267A (en) * | 2021-08-05 | 2021-11-02 | 福州大学 | Polycrystalline nano-magnesia charcoal adsorbent for enriching uranium in nuclear wastewater |
| CN113697832A (en) * | 2021-09-16 | 2021-11-26 | 安徽建筑大学 | Preparation method of basic magnesium carbonate nanosheet loaded activated carbon sponge |
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| CN103979537A (en) * | 2014-06-11 | 2014-08-13 | 福建省鑫森炭业股份有限公司 | Hemp-stalk activated charcoal and preparation method thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107416828A (en) * | 2017-08-31 | 2017-12-01 | 贺守印 | A kind of preparation method of magnesium oxide-based activated carbon |
| CN113209937A (en) * | 2018-09-14 | 2021-08-06 | 蚌埠越昇科技服务有限公司 | Method for preparing nano metal oxide loaded active carbon and application thereof |
| CN113209937B (en) * | 2018-09-14 | 2022-11-18 | 乐山中科正光农林科技有限公司 | Method for preparing nano metal oxide loaded active carbon and application thereof |
| CN109534339A (en) * | 2018-11-21 | 2019-03-29 | 常熟理工学院 | It is a kind of pine squama matrix activated carbon and its nanocomposite preparation method |
| CN110652961A (en) * | 2019-10-08 | 2020-01-07 | 安徽建筑大学 | Preparation method of magnesium oxide porous nano material loaded activated carbon fiber felt |
| CN111495322A (en) * | 2020-04-28 | 2020-08-07 | 海南省农业科学院农产品加工设计研究所 | Rambutan peel modified charcoal and preparation method and application thereof |
| CN111939872B (en) * | 2020-08-12 | 2021-11-02 | 华南农业大学 | Preparation method and application of activated hemp carbon adsorbent |
| CN111939872A (en) * | 2020-08-12 | 2020-11-17 | 华南农业大学 | Preparation method and application of activated hemp carbon adsorbent |
| CN112456521A (en) * | 2020-11-07 | 2021-03-09 | 宝鸡文理学院 | Method for preparing porous nano magnesium oxide by using corn straw template method and application thereof |
| CN112755961A (en) * | 2020-12-31 | 2021-05-07 | 中国科学院城市环境研究所 | MgO-loaded activated carbon and preparation method and application thereof |
| CN112755961B (en) * | 2020-12-31 | 2023-12-01 | 中国科学院城市环境研究所 | MgO-loaded activated carbon and preparation method and application thereof |
| CN113578267A (en) * | 2021-08-05 | 2021-11-02 | 福州大学 | Polycrystalline nano-magnesia charcoal adsorbent for enriching uranium in nuclear wastewater |
| CN113697832A (en) * | 2021-09-16 | 2021-11-26 | 安徽建筑大学 | Preparation method of basic magnesium carbonate nanosheet loaded activated carbon sponge |
| CN113697832B (en) * | 2021-09-16 | 2023-07-14 | 安徽建筑大学 | Preparation method of basic magnesium carbonate nanosheet-loaded activated carbon sponge |
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Application publication date: 20170503 |