CN112403434A - ZnCl for treating basic dye wastewater2Preparation method of microwave activated corncob activated carbon - Google Patents
ZnCl for treating basic dye wastewater2Preparation method of microwave activated corncob activated carbon Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- 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
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
Abstract
The invention relates to ZnCl for treating basic dye wastewater2The preparation method of the microwave activated corncob activated carbon comprises the following steps: step one, pretreating raw materials; weighing raw materials; step three, heating and refluxing; step four, microwave activation; step five, washing and filtering; step six, drying; and step seven, cooling and storing. The active carbon adsorbent prepared by the invention has a large amount of microporous structures, uniform pore size distribution and rich oxygen-containing functional groups on the surface, is beneficial to the attachment and deposition of dye molecules on the surface, and is more suitable for adsorption. The removal rate of methylene blue dye is the highestThe adsorption capacity can reach 99.9 percent, the maximum adsorption capacity can reach 440.5mg/g, the method can be used for treating wastewater containing basic dye, and has the advantages of simple preparation process, low cost, environmental protection and easy popularization.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to ZnCl for treating basic dye wastewater2A preparation method of microwave activated corncob activated carbon.
Background
Almost every industry uses dyes to color its products, and the remaining and unused dyes will be discharged into the environment. Because the main component of the dye in the printing and dyeing industrial wastewater is an aromatic heterocyclic compound, the dye has a complex and stable structure, is difficult to degrade, causes great pollution to the environment, and can greatly influence the normal operation of wastewater structures, the removal of the dye before the wastewater is discharged to public water sources is a major concern of people at present.
The wastewater treatment is to treat the wastewater by physical, chemical and biological methods, so that the wastewater is purified, the pollution is reduced, the wastewater is recycled and reused, and water resources are fully utilized. The printing and dyeing industrial wastewater mainly comes from each process of printing and dyeing processing, and is mainly characterized by large water quantity, high COD concentration, complex and variable components, deep chromaticity, large change of water quality and water quantity and strong toxicity, and belongs to one of industrial wastewater difficult to treat, so that the dye-containing wastewater in the printing and dyeing industrial production must be properly treated.
At present, the dye-containing wastewater treatment process at home and abroad mainly comprises the following steps: chemical oxidation: utilizing various oxidants to break unsaturated bonds of chromophoric groups in dye molecules to form organic matters or inorganic matters with smaller molecular mass, so that the dye loses chromophoric capacity, and the method mainly comprises an oxychlorination method, an ozone oxidation method and a photooxidation method; electrochemical method: mainly utilizes the modes of electrolytic oxidation, electrolytic reduction, electrolytic flocculation and air flotation and the like, and under the action of an external electric field, a great amount of active groups such as hydroxyl radicals and the like are generated through chemical reaction to destroy the molecular structure of the dye in the printing and dyeing wastewater, thereby realizing decolorization and reducing the concentration of main pollutants in the wastewater; ③ the biological method: removing organic matters in the wastewater by using the oxidative decomposition of microorganisms, wherein the method mainly comprises a aerobic biological treatment method and an anaerobic biological treatment method; fourthly, a coagulating sedimentation method: coagulant is added into the waste water in advance to lead the colloid or the fine suspended matters in the waste water to be aggregated into separable floc and form sediment, and then the process of separation and removal is carried out.
At present, the dyeing and printing industry in China mostly adopts a biochemical method to treat wastewater, in the actual operation process, a physical and chemical method, namely, a coagulation coagulant aid such as ferric salt, aluminum salt, PAM and the like is firstly adopted, and after the concentration and toxicity of pollutants in the dyeing and printing wastewater are reduced by means of adsorption net capture and the like, the wastewater enters a biochemical system to be treated. However, the method has the problems of limited biochemical treatment capacity, unstable biochemical operation, high chemical sludge yield and the like. The coagulation method can achieve good decolorizing effect when used for treating the printing and dyeing wastewater, but the coagulation method can only achieve good decolorizing effect on a limited number of dyes and cannot treat most dyes in the printing and dyeing wastewater, so that the coagulation method has certain limitation.
Disclosure of Invention
Aiming at the problems, the invention provides ZnCl for treating alkaline dye wastewater2The preparation method of the microwave activated corncob activated carbon can effectively solve the problems in the background technology.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
ZnCl for treating basic dye wastewater2The preparation method of the microwave activated corncob activated carbon specifically comprises the following steps:
(1) the corncobs were washed with distilled water. Then, the mixture is dried in a constant temperature blast drying oven. Then, the dried corncobs are taken out and crushed by a crusher and then screened by a 50-mesh screen, the screened corncob powder is uniformly spread and placed in a vacuum drying oven, and the dried corncob powder is dried for 24 hours under the condition of 60 ℃ so as to remove the moisture of the raw materials. Finally, the dried corncob meal is collected and placed in a dryer for use.
(2) 5g of corncob powder was added to 100mL of ZnCl in proportion2To the solution (5 wt%, 10 wt%, 15 wt%), stirring and mixing were done uniformly.
(3) And (3) placing the mixture obtained in the step (2) into a round-bottom flask with the volume of 250mL, adding magnetons, and refluxing in a constant-temperature water bath kettle at 100 ℃ for 5 hours. After completion of the reflux, the mixture was placed in a vacuum oven and dried at 100 ℃ for 24 hours to remove water.
(4) And (4) taking out the solid mixture obtained in the step (3), placing the solid mixture in a three-neck flask for microwave activation, wherein the activation power is 600-800W, the activation time is 2-5 min, and obtaining the product activated carbon after the reaction is finished.
(5) And (3) after the temperature in the three-neck flask is reduced to room temperature, collecting the activated carbon, washing the activated carbon with 0.5M HCl for three times, washing the activated carbon with distilled water until the pH value of a rinsing solution is about neutral, and filtering the obtained activated carbon by suction filtration.
(6) And (4) putting the activated carbon obtained in the step (5) into a vacuum drying oven, and drying for 24 hours at the temperature of 100 ℃.
(7) And (4) cooling the product dried in the step (6) to room temperature, grinding to obtain a finished product, and sealing and storing.
Furthermore, in step (2), the desired ZnCl2The optimal mass fraction of the solution is 10 wt%.
In step (4), the optimal power of the microwave activation is 700W, and the optimal activation time is 3 min.
The invention has the following technical effects:
the invention provides ZnCl for treating basic dye wastewater2Preparation method of microwave activated corncob activated carbon, namely, preparation method of microwave activated corncob activated carbon with ZnCl2Is heated and refluxed under the condition that water and ZnCl are heated and refluxed under the action of capillary tubes inside the corncobs2Is absorbed into the fine spaces between the fibers, causing the material to wet and expand. Simultaneously due to water and ZnCl2Is polar molecule, has strong microwave absorbing property, and can heat the inside and outside of the corn cob under microwave irradiation, water and ZnCl2Rapidly volatilizes to generate vapor pressure, and is rapidly extruded from the inside to the outside of the raw material. The fiber space is rapidly dried while being expanded, so that countless cracks are generated, the raw material has a more obvious porous structure than before microwave radiation, the internal specific surface area is obviously increased, and the absorption performance is higher.
The active carbon prepared by the invention has a large amount of microporous structures, uniform pore size distribution and rich oxygen-containing functional groups on the surface, is beneficial to the attachment and deposition of dye molecules on the surface and is more suitable for adsorption.
The active carbon prepared by the method has the highest removal rate of 99.9 percent for methylene blue dye, the maximum adsorption capacity of 440.5mg/g, can be used for treating wastewater containing basic dye, and has the advantages of simple preparation process, low cost, environmental protection and easy popularization.
Detailed description of the preferred embodiments
The adsorption performance of the activated carbon is characterized by the removal rate of methylene blue. The determination steps are as follows:
weighing 0.05g of the activated carbon obtained by the group (5) in microwave power of 700w for 3min, respectively, adding the activated carbon into a conical flask containing 50mL of methylene blue solution with initial concentration of 50, 100, 200, 300, 400 and 500mg/L, respectively, sealing the flask mouth, and transferring the flask into a constant-temperature shaking table to adsorb the methylene blue under the condition of keeping out of the sun. The rotation speed of the shaker was 170rpm, the temperature of the water bath was set to 30 ℃ and the time was set to 24h until equilibrium was reached. After the adsorption experiment was completed, the methylene blue solution after adsorption was taken out and filtered by using a syringe and a needle filter (0.22 μm), and the supernatant was separated. And measuring the absorbance of the solution at 664nm by using an ultraviolet-visible spectrophotometer, wherein the methylene blue removal rate of the activated carbon can be obtained by using a standard curve by using a methylene blue solution of 10mg/L as a standard sample and distilled water as a blank sample.
Example 1:
ZnCl for treating basic dye wastewater2The preparation method of the microwave activated corncob activated carbon comprises the following steps:
(1) the corncobs were washed with distilled water. Then, the mixture is dried in a constant temperature blast drying oven. Then, the dried corncobs are taken out and crushed by a crusher and then screened by a 50-mesh screen, the screened corncob powder is uniformly spread and placed in a vacuum drying oven, and the dried corncob powder is dried for 24 hours under the condition of 60 ℃ so as to remove the moisture of the raw materials. Finally, the dried corncob meal is collected and placed in a dryer for use.
(2) 5g of corncob powder was added to 100mL of ZnCl with a mass fraction of 10 wt%2In the solution, stirring and mixing uniformly.
(3) And (3) placing the mixture obtained in the step (2) into a round-bottom flask with the volume of 250mL, adding magnetons, and refluxing in a constant-temperature water bath kettle at 100 ℃ for 5 hours. After completion of the reflux, the mixture was placed in a vacuum oven and dried at 100 ℃ for 24 hours to remove water.
(4) And (4) taking out the solid mixture obtained in the step (3), placing the solid mixture in a three-neck flask for microwave activation, wherein the activation power is 700W, the activation time is 3min, and obtaining the product activated carbon after the reaction is finished.
(5) And (3) after the temperature in the three-neck flask is reduced to room temperature, collecting the activated carbon, washing the activated carbon by using 0.5M HCl, washing the activated carbon by using distilled water until the pH value of a rinsing solution is about neutral, and filtering the obtained activated carbon by suction filtration.
(6) And (4) putting the activated carbon obtained in the step (5) into a vacuum drying oven, and drying for 24 hours at the temperature of 100 ℃.
(7) And (4) cooling the product dried in the step (6) to room temperature, grinding to obtain a finished product, and sealing and storing.
The methylene blue adsorption experiment of the activated carbon obtained above shows that the methylene blue removal rate of the activated carbon is about 99.9% and the equilibrium adsorption capacity is about 49.9mg/g in 50mL of methylene blue solution with the concentration of 50 mg/L.
Example 2:
ZnCl for treating basic dye wastewater2The preparation method of the microwave activated corncob activated carbon comprises the following steps:
(1) the corncobs were washed with distilled water. Then, the mixture is dried in a constant temperature blast drying oven. Then, the dried corncobs are taken out and crushed by a crusher and then screened by a 50-mesh screen, the screened corncob powder is uniformly spread and placed in a vacuum drying oven, and the dried corncob powder is dried for 24 hours under the condition of 60 ℃ so as to remove the moisture of the raw materials. Finally, the dried corncob meal is collected and placed in a dryer for use.
(2) 5g of corncob powder was added to 100mL of ZnCl with a mass fraction of 10 wt%2In the solution, stirring and mixing uniformly.
(3) And (3) placing the mixture obtained in the step (2) into a round-bottom flask with the volume of 250mL, adding magnetons, and refluxing in a constant-temperature water bath kettle at 100 ℃ for 5 hours. After completion of the reflux, the mixture was placed in a vacuum oven and dried at 100 ℃ for 24 hours to remove water.
(4) And (4) taking out the solid mixture obtained in the step (3), placing the solid mixture in a three-neck flask for microwave activation, wherein the activation power is 700W, the activation time is 3min, and obtaining the product activated carbon after the reaction is finished.
(5) And (3) after the temperature in the three-neck flask is reduced to room temperature, collecting the activated carbon, washing the activated carbon by using 0.5M HCl, washing the activated carbon by using distilled water until the pH value of a rinsing solution is about neutral, and filtering the obtained activated carbon by suction filtration.
(6) And (4) putting the activated carbon obtained in the step (5) into a vacuum drying oven, and drying for 24 hours at the temperature of 100 ℃.
(7) And (4) cooling the product dried in the step (6) to room temperature, grinding to obtain a finished product, and sealing and storing.
The methylene blue adsorption experiment of the activated carbon obtained above shows that the methylene blue removal rate of the activated carbon is about 99.9% and the equilibrium adsorption capacity is about 199.9mg/g in 50mL of methylene blue solution with the concentration of 100 mg/L.
Example 3:
ZnCl for treating basic dye wastewater2The preparation method of the microwave activated corncob activated carbon comprises the following steps:
(1) the corncobs were washed with distilled water. Then, the mixture is dried in a constant temperature blast drying oven. Then, the dried corncobs are taken out and crushed by a crusher and then screened by a 50-mesh screen, the screened corncob powder is uniformly spread and placed in a vacuum drying oven, and the dried corncob powder is dried for 24 hours under the condition of 60 ℃ so as to remove the moisture of the raw materials. Finally, the dried corncob meal is collected and placed in a dryer for use.
(2) 5g of corncob powder was added to 100mL of ZnCl with a mass fraction of 10 wt%2In the solution, stirring and mixing uniformly.
(3) And (3) placing the mixture obtained in the step (2) into a round-bottom flask with the volume of 250mL, adding magnetons, and refluxing in a constant-temperature water bath kettle at 100 ℃ for 5 hours. After completion of the reflux, the mixture was placed in a vacuum oven and dried at 100 ℃ for 24 hours to remove water.
(4) And (4) taking out the solid mixture obtained in the step (3), placing the solid mixture in a three-neck flask for microwave activation, wherein the activation power is 700W, the activation time is 3min, and obtaining the product activated carbon after the reaction is finished.
(5) And (3) after the temperature in the three-neck flask is reduced to room temperature, collecting the activated carbon, washing with 0.5M HCl, washing with distilled water until the pH of a rinsing solution is about neutral, and filtering the obtained activated carbon by suction filtration.
(6) And (4) putting the activated carbon obtained in the step (5) into a vacuum drying oven, and drying for 24 hours at the temperature of 100 ℃.
(7) And (4) cooling the product dried in the step (6) to room temperature, grinding to obtain a finished product, and sealing and storing.
The methylene blue adsorption experiment of the activated carbon obtained above shows that the methylene blue removal rate of the activated carbon is about 99.4% and the equilibrium adsorption capacity is about 198.8mg/g in 50mL of methylene blue solution with the concentration of 200 mg/L.
Example 4:
ZnCl for treating basic dye wastewater2The preparation method of the microwave activated corncob activated carbon comprises the following steps:
(1) the corncobs were washed with distilled water. Then, the mixture is dried in a constant temperature blast drying oven. Then, the dried corncobs are taken out and crushed by a crusher and then screened by a 50-mesh screen, the screened corncob powder is uniformly spread and placed in a vacuum drying oven, and the dried corncob powder is dried for 24 hours under the condition of 60 ℃ so as to remove the moisture of the raw materials. Finally, the dried corncob meal is collected and placed in a dryer for use.
(2) 5g of corncob powder was added to 100mL of ZnCl with a mass fraction of 10 wt%2In the solution, stirring and mixing uniformly.
(3) And (3) placing the mixture obtained in the step (2) into a round-bottom flask with the volume of 250mL, adding magnetons, and refluxing in a constant-temperature water bath kettle at 100 ℃ for 5 hours. After completion of the reflux, the mixture was placed in a vacuum oven and dried at 100 ℃ for 24 hours to remove water.
(4) And (4) taking out the solid mixture obtained in the step (3), placing the solid mixture in a three-neck flask for microwave activation, wherein the activation power is 700W, the activation time is 3min, and obtaining the product activated carbon after the reaction is finished.
(5) And (3) after the temperature in the three-neck flask is reduced to room temperature, collecting the activated carbon, washing with 0.5M HCl, washing with distilled water until the pH of a rinsing solution is about neutral, and filtering the obtained activated carbon by suction filtration.
(6) And (4) putting the activated carbon obtained in the step (5) into a vacuum drying oven, and drying for 24 hours at the temperature of 100 ℃.
(7) And (4) cooling the product dried in the step (6) to room temperature, grinding to obtain a finished product, and sealing and storing.
The methylene blue adsorption experiment of the activated carbon obtained above shows that the methylene blue removal rate of the activated carbon is about 98.9% and the equilibrium adsorption capacity is about 296.6mg/g in 50mL of methylene blue solution with the concentration of 300 mg/L.
Example 5:
a preparation method of ZnCl 2-microwave activated corncob activated carbon for treating basic dye wastewater comprises the following steps:
(1) the corncobs were washed with distilled water. Then, the mixture is dried in a constant temperature blast drying oven. Then, the dried corncobs are taken out and crushed by a crusher and then screened by a 50-mesh screen, the screened corncob powder is uniformly spread and placed in a vacuum drying oven, and the dried corncob powder is dried for 24 hours under the condition of 60 ℃ so as to remove the moisture of the raw materials. Finally, the dried corncob meal is collected and placed in a dryer for use.
(2) 5g of corncob powder was added to 100mL of ZnCl with a mass fraction of 10 wt%2In the solution, stirring and mixing uniformly.
(3) And (3) placing the mixture obtained in the step (2) into a round-bottom flask with the volume of 250mL, adding magnetons, and refluxing in a constant-temperature water bath kettle at 100 ℃ for 5 hours. After completion of the reflux, the mixture was placed in a vacuum oven and dried at 100 ℃ for 24 hours to remove water.
(4) And (4) taking out the solid mixture obtained in the step (3), placing the solid mixture in a three-neck flask for microwave activation, wherein the activation power is 700W, the activation time is 3min, and obtaining the product activated carbon after the reaction is finished.
(5) And (3) after the temperature in the three-neck flask is reduced to room temperature, collecting the activated carbon, washing with 0.5M HCl, washing with distilled water until the pH of a rinsing solution is about neutral, and filtering the obtained activated carbon by suction filtration.
(6) And (4) putting the activated carbon obtained in the step (5) into a vacuum drying oven, and drying for 24 hours at the temperature of 100 ℃.
(7) And (4) cooling the product dried in the step (6) to room temperature, grinding to obtain a finished product, and sealing and storing.
The methylene blue adsorption experiment of the activated carbon obtained in the above step shows that the methylene blue removal rate of the activated carbon is about 94.2% and the equilibrium adsorption capacity is about 376.9mg/g in 50mL of methylene blue solution with the concentration of 400 mg/L.
Example 6:
ZnCl for treating basic dye wastewater2The preparation method of the microwave activated corncob activated carbon comprises the following steps:
(1) washing the corncobs with distilled water, and then placing the corncobs in a constant-temperature air-blast drying oven for drying. Then, the dried corncobs are taken out and crushed by a crusher and then screened by a 50-mesh screen, the screened corncob powder is uniformly spread and placed in a vacuum drying oven, and the dried corncob powder is dried for 24 hours under the condition of 60 ℃ so as to remove the moisture of the raw materials. Finally, the dried corncob meal is collected and placed in a dryer for use.
(2) 5g of corncob powder was added to 100mL of ZnCl with a mass fraction of 10 wt%2In the solution, stirring and mixing uniformly.
(3) And (3) placing the mixture obtained in the step (2) into a round-bottom flask with the volume of 250mL, adding magnetons, and refluxing in a constant-temperature water bath kettle at 100 ℃ for 5 hours. After completion of the reflux, the mixture was placed in a vacuum oven and dried at 100 ℃ for 24 hours to remove water.
(4) And (4) taking out the solid mixture obtained in the step (3), placing the solid mixture in a three-neck flask for microwave activation, wherein the activation power is 700W, the activation time is 3min, and obtaining the product activated carbon after the reaction is finished.
(5) And (3) after the temperature in the three-neck flask is reduced to room temperature, collecting the activated carbon, washing the activated carbon by using 0.5M HCl, washing the activated carbon by using distilled water until the pH value of a rinsing solution is about neutral, and filtering the obtained activated carbon by suction filtration.
(6) And (4) putting the activated carbon obtained in the step (5) into a vacuum drying oven, and drying for 24 hours at the temperature of 100 ℃.
(7) And (4) cooling the product dried in the step (6) to room temperature, grinding to obtain a finished product, and sealing and storing.
The methylene blue adsorption experiment of the activated carbon obtained in the above step shows that the methylene blue removal rate of the activated carbon is about 87.2% and the equilibrium adsorption amount is about 435.9mg/g in 50mL of methylene blue solution with the concentration of 500 mg/L.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those of ordinary skill in the art can readily practice the present invention as described herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (3)
1. ZnCl for treating basic dye wastewater2The preparation method of the microwave activated corncob activated carbon comprises the following steps: step one, pretreating raw materials; weighing raw materials; step three, refluxing, heating and drying; step four, microwave activation; step five, washing and filtering; step six, drying; step seven: cooling and storing; the method is characterized in that:
(1) washing the corncobs with distilled water, and then placing the corncobs in a constant-temperature air-blast drying oven for drying. Then, the dried corncobs are taken out and crushed by a crusher and then screened by a 50-mesh screen, the screened corncob powder is uniformly spread and placed in a vacuum drying oven, and the dried corncob powder is dried for 24 hours under the condition of 60 ℃ so as to remove the moisture of the raw materials. Finally, the dried corncob meal is collected and placed in a dryer for use.
(2) 5g of corncob powder was added to 100mL of ZnCl in proportion2To the solution (5 wt%, 10 wt%, 15 wt%), stirring and mixing were done uniformly.
(3) And (3) placing the mixture obtained in the step (2) into a round-bottom flask with the volume of 250mL, adding magnetons, and refluxing in a constant-temperature water bath kettle at 100 ℃ for 5 hours. After completion of the reflux, the mixture was placed in a vacuum oven and dried at 100 ℃ for 24 hours to remove water.
(4) And (4) taking out the solid mixture obtained in the step (3), placing the solid mixture in a three-neck flask for microwave activation, wherein the activation power is 600-800W, the activation time is 2-5 min, and obtaining the product activated carbon after the reaction is finished.
(5) And (3) after the temperature in the three-neck flask is reduced to room temperature, collecting the activated carbon, washing the activated carbon by using 0.5M HCl, washing the activated carbon by using distilled water until the pH value of a rinsing solution is about neutral, and filtering the obtained activated carbon by suction filtration.
(6) And (4) putting the activated carbon obtained in the step (5) into a vacuum drying oven, and drying for 24 hours at the temperature of 100 ℃.
(7) And (4) cooling the product dried in the step (6) to room temperature, grinding to obtain a finished product, and sealing and storing.
2. ZnCl for treating basic dye wastewater according to claim 12The preparation method of the microwave activated corncob activated carbon is characterized by comprising the following steps: in the step (2), ZnCl is required2The optimal mass fraction of the solution is 10 wt%.
3. ZnCl for treating basic dye wastewater according to claim 12The preparation method of the microwave activated corncob activated carbon is characterized by comprising the following steps: in the fourth step, the optimal power of microwave activation is 700W, and the optimal activation time is 3 min.
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Citations (3)
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| CN105080499A (en) * | 2015-05-18 | 2015-11-25 | 江苏大学 | Methylene blue dye adsorbent and preparation and application method thereof |
| CN105457595A (en) * | 2015-11-20 | 2016-04-06 | 天津工业大学 | Preparation method of active carbon for adsorbing methylene blue in wastewater |
| CN107115843A (en) * | 2017-05-23 | 2017-09-01 | 江苏大学 | A kind of preparation method and applications for coming from peanut shell modified activated carbon |
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2019
- 2019-08-21 CN CN201910771896.6A patent/CN112403434A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080499A (en) * | 2015-05-18 | 2015-11-25 | 江苏大学 | Methylene blue dye adsorbent and preparation and application method thereof |
| CN105457595A (en) * | 2015-11-20 | 2016-04-06 | 天津工业大学 | Preparation method of active carbon for adsorbing methylene blue in wastewater |
| CN107115843A (en) * | 2017-05-23 | 2017-09-01 | 江苏大学 | A kind of preparation method and applications for coming from peanut shell modified activated carbon |
Non-Patent Citations (2)
| Title |
|---|
| ABDURRAHMAN OZHAN等: ""Preparation and characterization of activated carbon from pine cone by microwave-induced ZnCl2 activation and its effects on the adsorption of methylene blue"", 《CELLULOSE》 * |
| W.T.TSAI等: ""A low cost adsorbent from agricultural waste corn cob by zinc chloride activation"", 《BIORESOURCE TECHNOLOGY》 * |
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Application publication date: 20210226 |