CN105170084A - Preparation method of magnetic active carbon for adsorbing heavy metals in water - Google Patents
Preparation method of magnetic active carbon for adsorbing heavy metals in water Download PDFInfo
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- CN105170084A CN105170084A CN201510592082.8A CN201510592082A CN105170084A CN 105170084 A CN105170084 A CN 105170084A CN 201510592082 A CN201510592082 A CN 201510592082A CN 105170084 A CN105170084 A CN 105170084A
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Abstract
The invention provides a preparation method of magnetic active carbon for adsorbing heavy metals in the water. The method comprises the following steps: adding a given amount of active carbon into the water, ultrasonically processing and stirring, and uniformly dispersing the active carbon into the water; adding a bivalent iron salt into an aqueous solution, completely dissolving the bivalent iron salt, to obtain a bivalent iron salt mixed solution containing the active carbon; adjusting the pH value of the mixed solution by utilizing alkali to 9 to 11 to obtain dark green precipitates; adding a given amount of reduction reagent, and sufficiently stirring for 10 minutes or more; placing the reaction solution in the water of 60 to 90 DEG C to have reaction for 2 to 6 hours, to obtain black precipitates; and washing the precipitates until the filter liquid is neutral, and air drying the precipitates at the normal temperature to obtain the magnetic active carbon material. The preparation method has advantages of simple process, low cost and the like; and moreover, the synthesized magnetic active carbon material has good adsorption performance and magnetic separation capacity.
Description
Technical field
The invention belongs to field of water processing technology, relate to a kind of magnetic active carbon, specifically a kind of preparation method of the magnetic active carbon for adsorbing heavy metal in water.
Background technology
In recent years, along with society's industry and expanding economy, living standards of the people improve constantly, but are on the rise by developing the environmental pollution brought, and wherein heavy metal water pollutions is one of environmental problem of the sternness faced at present.Heavy metal pollution is mainly derived from the industries such as chemical industry, mining, metal smelt, motor vehicle exhaust emission, plating, steamer manufacture.Heavy metal have carcinogenic, cause disease, mutagenicity, can at animals and plants cylinder accumulation.When people is long-term and heavy metal contact can cause damage and fracture to intracorporeal organ and metabolism, body tissue canceration can be caused further.
Active carbon (AC) has high-specific surface area, flourishing internal microcellular structure, and surface exists a large amount of functional groups, and oneself is proved to be a kind of conventional adsorbent effectively removing organic pollution in the environment and heavy metal ion and complex compound thereof.But active carbon usually all can abandon after water treatment uses, thus cause secondary pollution.After being combined with magnetic nano-particle by active carbon, active carbon is able to the object being reached recovery by externally-applied magnetic field.
Summary of the invention
For above-mentioned technical problem of the prior art, the invention provides a kind of preparation method of the magnetic active carbon for adsorbing heavy metal in water, the preparation method of the described this magnetic active carbon for adsorbing heavy metal in water solves after active carbon of the prior art uses the technical problem abandoning, cause secondary pollution.
The preparation method of a kind of magnetic active carbon for adsorbing heavy metal in water of the present invention, comprises the steps: that a certain amount of active carbon is added to the water by (1), and carries out ultrasonic and stir, and makes active carbon evenly spread in water;
(2) divalent iron salt is joined in the water liquid of step (1), make it dissolve completely, obtain the divalent iron salt mixed solution containing active carbon;
(3) with alkali, the pH value of above-mentioned mixed solution is adjusted to 9 ~ 11, obtains blackish green precipitation;
(4) add again in the solution of step (3) and go back original reagent, ultrasonic and stir 10 ~ 30 minutes, described in go back original reagent be hydrazine hydrate, urea or glucose;
(5) above-mentioned reactant liquor is placed in the water reaction 1 ~ 6h of 60 ~ 90 DEG C, obtains black precipitate;
(6) by above-mentioned black precipitate washing to filtrate in neutral, air-dryly at normal temperatures can obtain magnetic active carbon material.
Further, described divalent iron salt is ferrous sulfate, ferrous nitrate, frerrous chloride, ferrous acetate or iron ammonium sulfate.
Further, in step 2) described in the mass percent concentration going back original reagent be 50 ~ 90%.
Further, in step 2) described in divalent iron salt, active carbon and the material ratio of going back original reagent be 0.01 ~ 0.03mol:0.3 ~ 0.5g:0.5 ~ 1mol.
Further, described alkali is NaOH, potassium hydroxide, sodium carbonate, potash or ammoniacal liquor.
Application in the heavy metal cation of the magnetic active carbon that present invention also offers above-mentioned preparation in adsorbed water, described heavy metal comprises chromium, cadmium, arsenic, mercury, lead, copper etc.
Technique of the present invention is simple, with low cost, and the magnetic active carbon material synthesized has good absorption property and Magneto separate ability.
The present invention compares with prior art, and its technological progress is significant.Large, the easily separated recovery of the magnetic active carbon adsorption capacity prepared by method of the present invention.
Detailed description of the invention
embodiment 1
The preparation of magnetic active carbon: take 0.02molFeSO
4be dissolved in 1000mL water, add 3.5g active carbon (200 order), ultrasonic, stir each 10 minutes, regulate pH to 10 with concentrated sodium hydroxide, add 24mL hydrazine (85%) again, continue ultrasonic, stir each 5 minutes, seal beaker mouth with plastic sheeting, be placed in 80 DEG C of water and carry out water-bath 2h, after taking out nature cooling, gained pelleting centrifugation washing several is to cleaning solution in neutral, and natural air drying, obtains magnetic active carbon.
embodiment 2
Magnetic active carbon is to the process of chromate waste water: get the waste water (pH=4.0) of 500mL containing chromium 20mg/L, add 2g magnetic active carbon, after stirring 1h, with magnet, magnetic active carbon is separated from water, recording chromium content in the rear waste water of absorption is 0.13mg/L, and the clearance of chromium is 99.4%.
Claims (6)
1., for a preparation method for the magnetic active carbon of adsorbing heavy metal in water, it is characterized in that comprising the steps:
(1) a certain amount of active carbon is added to the water, and carries out ultrasonic and stir, make active carbon evenly spread in water;
(2) divalent iron salt is joined in the water liquid of step (1), make it dissolve completely, obtain the divalent iron salt mixed solution containing active carbon;
(3) with alkali, the pH value of above-mentioned mixed solution is adjusted to 9 ~ 11, obtains blackish green precipitation;
(4) add again in the solution of step (3) and go back original reagent, ultrasonic and stir 10 ~ 30 minutes, described in go back original reagent be hydrazine hydrate, urea or glucose;
(5) above-mentioned reactant liquor is placed in the water reaction 1 ~ 6h of 60 ~ 90 DEG C, obtains black precipitate;
(6) by above-mentioned black precipitate washing to filtrate in neutral, air-dryly at normal temperatures can obtain magnetic active carbon material.
2. the preparation method of a kind of magnetic active carbon for adsorbing heavy metal in water according to claim 1, is characterized in that: described divalent iron salt is ferrous sulfate, ferrous nitrate, frerrous chloride, ferrous acetate or iron ammonium sulfate.
3. the preparation method of a kind of magnetic active carbon for adsorbing heavy metal in water according to claim 1, is characterized in that: the described mass percent concentration going back original reagent is 50 ~ 90%.
4. the preparation method of a kind of magnetic active carbon for adsorbing heavy metal in water according to claim 1, is characterized in that: divalent iron salt, active carbon and the material ratio going back original reagent are: 0.01 ~ 0.03mol:0.3 ~ 0.5g:0.5 ~ 1mol.
5. the preparation method of a kind of magnetic active carbon for adsorbing heavy metal in water according to claim 1, is characterized in that: described alkali is NaOH, potassium hydroxide, sodium carbonate, potash or ammoniacal liquor.
6. the application in the heavy metal cation of the magnetic active carbon obtained by preparation method according to claim 1 in adsorbed water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510592082.8A CN105170084A (en) | 2015-09-17 | 2015-09-17 | Preparation method of magnetic active carbon for adsorbing heavy metals in water |
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| CN201510592082.8A CN105170084A (en) | 2015-09-17 | 2015-09-17 | Preparation method of magnetic active carbon for adsorbing heavy metals in water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107376844A (en) * | 2017-09-19 | 2017-11-24 | 江苏科力特环保科技有限公司 | A kind of preparation method of modification with Fe activated carbon |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040147397A1 (en) * | 2002-02-26 | 2004-07-29 | Miller Jan D. | Magnetic activated carbon particles for adsorption of solutes from solution |
| CN102600794A (en) * | 2012-04-10 | 2012-07-25 | 东北大学 | Two preparation methods of nanometer magnetic adsorbent |
| CN103007882A (en) * | 2012-12-13 | 2013-04-03 | 同济大学 | Preparation method of Fe3O4@MnO2/active carbon magnetic compound adsorption material |
| CN103357378A (en) * | 2013-08-03 | 2013-10-23 | 彭晓领 | Preparation method for recoverable active carbon material |
| CN103418342A (en) * | 2013-08-03 | 2013-12-04 | 彭晓领 | Preparation method of magnetically-separable active carbon material |
-
2015
- 2015-09-17 CN CN201510592082.8A patent/CN105170084A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040147397A1 (en) * | 2002-02-26 | 2004-07-29 | Miller Jan D. | Magnetic activated carbon particles for adsorption of solutes from solution |
| CN102600794A (en) * | 2012-04-10 | 2012-07-25 | 东北大学 | Two preparation methods of nanometer magnetic adsorbent |
| CN103007882A (en) * | 2012-12-13 | 2013-04-03 | 同济大学 | Preparation method of Fe3O4@MnO2/active carbon magnetic compound adsorption material |
| CN103357378A (en) * | 2013-08-03 | 2013-10-23 | 彭晓领 | Preparation method for recoverable active carbon material |
| CN103418342A (en) * | 2013-08-03 | 2013-12-04 | 彭晓领 | Preparation method of magnetically-separable active carbon material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107376844A (en) * | 2017-09-19 | 2017-11-24 | 江苏科力特环保科技有限公司 | A kind of preparation method of modification with Fe activated carbon |
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Application publication date: 20151223 |