CN112044408A - Magnetic bamboo fiber and preparation process thereof - Google Patents
Magnetic bamboo fiber and preparation process thereof Download PDFInfo
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- CN112044408A CN112044408A CN202011037062.1A CN202011037062A CN112044408A CN 112044408 A CN112044408 A CN 112044408A CN 202011037062 A CN202011037062 A CN 202011037062A CN 112044408 A CN112044408 A CN 112044408A
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- 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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28009—Magnetic properties
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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
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
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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
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
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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
- C02F2101/006—Radioactive compounds
Abstract
The invention relates to a magnetic bamboo fiber which is prepared from the following components in parts by weight: 0.8-1.2 parts of ferrous sulfate tetrahydrate, 1.4-1.8 parts of ferric trichloride hexahydrate, 1.5-2.5 parts of 80-mesh natural bamboo powder, 0.8-1.2 parts of polyethylene glycol, 2.5-3.5 parts of sodium acetate and 90-92 parts of ethylene glycol, wherein the natural bamboo powder is prepared by directly firing and crushing bamboo fibers. Aiming at the defects of the traditional adsorbing material and the method for treating wastewater, the invention fully exerts the respective unique advantages of agricultural and sideline products and magnetic adsorbents, and the material has the characteristics of high stability, low preparation cost, abundant and renewable preparation raw materials, simple and convenient preparation method and capability of being recycled, and is mainly shown in the following steps: the main material is bamboo fiber which is prepared from bamboo, and the raw material is rich, easy to obtain, cheap and renewable; the preparation method is simple and convenient, and the preparation cost is low; the material has better magnetic conductivity, and can be recycled by using the magnetic property.
Description
Technical Field
The invention relates to the field of new materials for treating and repairing water pollution, in particular to magnetic bamboo fiber and a preparation process thereof.
Background
The radioactive elements contained in the radioactive wastewater can only reach a natural level with lower activity in a natural decay mode, and the radioactive elements have the characteristics of high biotoxicity, thermal stability, easy migration and the like. For the treatment of radioactive wastewater at home and abroad, the current methods mainly comprise the following steps: ion exchange method, evaporation concentration method, membrane treatment method, adsorption method, and combination treatment method of multiple technologies.
At present, the adsorption method is the most widely applied method in the treatment of radioactive wastewater, and mainly comprises the steps of putting a porous solid material into the wastewater, and adsorbing nuclides in the wastewater on the solid material through the surface performance of the material so as to achieve the purpose of separating and removing the radionuclides. The materials commonly used for the adsorbent include red soil, bentonite, attapulgite, zeolite, natural clay minerals and biological materials such as waste crops and plant pericarp, and artificially synthesized nano materials such as graphene oxide and hydrotalcite-like compound. The current research on adsorption methods is mainly to develop novel adsorbents and to improve the process level.
In the field of new materials for treating and repairing water pollution in the prior art, magnetic bamboo fiber-based activated carbon materials are already involved, and the preparation cost and the preparation process of the magnetic bamboo fibers are directly related to the input cost of the new materials for treating and repairing water pollution.
Such as: cn201410469525.x discloses a pharmaceutical composition prepared from the following raw materials in parts by weight: 150 portions of fruit shell activated carbon 135-containing material, 2-3 portions of sodium silicate, 3.5-4.5 portions of sodium carbonate, 4-6 portions of polyvinylpyrrolidone, 2-3 portions of sodium citrate, 2-3.5 portions of sodium bicarbonate, 1-2 portions of potassium fluotitanate, 2-3 portions of disodium hydrogen phosphate, 10-14 portions of cordierite powder, 7-9 portions of iron powder core, 4-6 portions of adsorption auxiliary agent and a proper amount of water; the iron powder core is added into the activated carbon, so that the activated carbon has magnetism, the adsorption effect is enhanced, meanwhile, the adsorption auxiliary agent and other components are added, after treatment, the filter material has various pore structures and a large specific surface area, the adsorption efficiency is improved, and acidic or alkaline or compound volatile harmful gases can be effectively removed.
CN201710501383.4 discloses a magnetic bamboo fiber based activated carbon material mainly composed of bamboo fiber raw material and iron oxide adsorbed on the bamboo fiber raw material, which is prepared mainly from iron salt, bamboo fiber raw material and redistilled water, by soaking the bamboo fiber raw material in aqueous solution of iron salt, the iron salt solution is uniformly adsorbed on the bamboo fiber raw material; the iron salt may be ferric ammonium oxalate ((NH)4)3Fe(C2O4)3) Iron chloride hydrate (FeCl)3·6H2O), ferric ammonium citrate ((NH)4)3Fe(C6H5O7)2) Potassium oxalate ferrate (K)3Fe(C2O4)3·3H2O) any one of the above; the weight portions of the preparation raw materials are as follows: iron salt: 0.5-10 parts; bamboo fiber raw material: 1-10 parts; secondary distilled water: 5 to 100 parts.
CN202010293461.8 discloses a preparation method of a modified magnetic bamboo fiber composite adsorbent, (1) bamboo fiber pretreatment: deionized water: 74-78%, hydrochloric acid: 8-12%, sodium chloride: 4-8%, uniformly mixing, adding bamboo fiber powder: 6-10% of bamboo fiber powder, soaking at room temperature for 24h, heating to 80 +/-2 ℃, keeping the temperature constant, stirring, reacting for 60min, carrying out solid-liquid separation, washing with deionized water, and drying to obtain pretreated bamboo fiber powder; (2) preparing a magnetic bamboo fiber composite ball: n, N-dimethylacetamide: 76-80%, polyvinylidene fluoride: 6-8%, heating to 65 +/-2 ℃, keeping the temperature constant, stirring to dissolve, and preparing the carboxylated ferroferric oxide magnetic nanoparticles: 4-6%, pretreating bamboo fiber powder: 8-12%, ultrasonically dispersing for 30min, spraying viscous suspension liquid in water through a nozzle for curing, soaking in water for 16 h, performing solid-liquid separation, washing with deionized water, and drying to obtain magnetic bamboo fiber composite balls; (3) preparing a modified magnetic bamboo fiber composite adsorbent: 1, 4-dioxane solvent: 83-87%, magnetic bamboo fiber composite ball: 8-12%, soaking for 24h, stirring, and mixing 1- (2-aminoethyl) pyrrolidine: 4-6%, heating to 50 +/-2 ℃, reacting for 4 hours at constant temperature, separating solid from liquid, washing with deionized water, soaking in 0.4mol/L NaON solution for 12 hours, washing with water and ethanol for multiple times, and drying to obtain the modified magnetic bamboo fiber composite adsorbent.
Disclosure of Invention
The invention also aims to provide the magnetic bamboo fiber and the preparation process thereof, wherein the magnetic bamboo fiber has high stability, good treatment effect, low preparation cost and simple and convenient preparation method.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the magnetic bamboo fiber is prepared from the following components in parts by weight: 0.8-1.2 parts of ferrous sulfate tetrahydrate, 1.4-1.8 parts of ferric trichloride hexahydrate, 1.5-2.5 parts of 80-mesh natural bamboo powder, 0.8-1.2 parts of polyethylene glycol, 2.5-3.5 parts of sodium acetate and 90-92 parts of ethylene glycol, wherein the natural bamboo powder is prepared by directly firing and crushing bamboo fibers.
The preparation process of the magnetic bamboo fiber comprises the following steps:
(a) weighing ferrous sulfate tetrahydrate, ferric trichloride hexahydrate, sodium acetate and polyethylene glycol according to the weight parts of the components, pouring the ferrous sulfate tetrahydrate, the ferric trichloride hexahydrate, the sodium acetate and the polyethylene glycol into a beaker containing a certain amount of ethylene glycol solution, and stirring to obtain a mixed solution;
(b) carrying out ultrasonic treatment on the mixed solution;
(c) b, stirring the solution obtained in the step b at a certain temperature to fully dissolve the solution;
(d) weighing 80-mesh bamboo powder according with the required weight part, adding the bamboo powder into the solution obtained in the step c, and fully stirring;
(e) d, pouring the mixed solution obtained in the step d into a stainless steel reaction kettle with a polytetrafluoroethylene material as a lining, putting the stainless steel reaction kettle into a program-controlled box-type furnace for high-temperature reaction for a certain time, taking out the reaction kettle, and cooling to room temperature;
(f) and e, repeatedly washing the product obtained in the step e by using deionized water and ethanol, and drying the product in vacuum at the temperature of 60 ℃ to obtain the magnetic bamboo fiber material.
Wherein polyethylene glycol is used as a dispersing agent in the step (a); in the step (a), ethylene glycol is used as a solvent.
Further, carrying out ultrasonic treatment on the mixed solution in the step (b) for 15-30 min; in the step (c), the solution is stirred at the temperature of below 50 ℃ to be fully dissolved; in the step (e), the high temperature is 200 ℃, and the reaction time is 6-8 h.
Aiming at the defects of the traditional adsorbing material and the method for treating wastewater, the invention fully exerts the respective unique advantages of agricultural and sideline products and magnetic adsorbents, and the material has the characteristics of high stability, low preparation cost, abundant and renewable preparation raw materials, simple and convenient preparation method and capability of being recycled, and is mainly shown in the following steps: (1) the main material is bamboo fiber which is prepared from bamboo, and the raw material is rich, easy to obtain, cheap and renewable; (2) the preparation method is simple and convenient, and the preparation cost is low; (3) the material has better magnetic conductivity, and can be recycled by using the magnetic property. (4) Compared with the background technology, the invention adopts a one-step method for preparation, and the operation steps are greatly simplified; the prepared magnetic bamboo fiber can be directly fired without a pretreatment link, the prepared magnetic bamboo fiber is short in time consumption and few in chemical reagent types, the material is placed into a muffle furnace by a solvothermal method, the highest temperature is 200 ℃, the synthesis condition is mild and easy to realize, the prepared magnetic bamboo fiber can be easily suspended in an aqueous solution, and the removal rate of pollutants is high; wherein ferrous sulfate tetrahydrate and ferric trichloride hexahydrate are used as iron sources of the magnetic bamboo fibers; polyethylene glycol is used as a reaction system dispersing agent, so that the phenomenon of agglomeration of magnetic bamboo fibers generated by reaction is avoided; the sodium acetate has the functions of guiding and dispersing products; the glycol is used as a reaction reduction solvent, and can prevent hydrolysis due to high viscosity, control the supersaturation degree of the product, change the growth mechanism and be beneficial to the formation of a large number of crystal nuclei.
The ferrous sulfate tetrahydrate, ferric trichloride hexahydrate, polyethylene glycol, sodium acetate, ethylene glycol and the like are all nontoxic or low-toxicity reagents, so that the experimental operation control is facilitated, and the price is low and easy to obtain.
Drawings
FIG. 1 is a view of the appearance of the magnetic bamboo fiber of the present invention under a scanning electron microscope;
FIG. 2 is a view of the appearance of the magnetic bamboo fiber of the present invention under a transmission electron microscope;
FIG. 3 is a schematic view of the convergence of magnetic bamboo fibers under a magnet according to the present invention;
FIG. 4 is a hysteresis loop diagram of the magnetic bamboo fiber of the present invention.
Detailed Description
The magnetic bamboo fiber is prepared from the following components in parts by weight: 0.8-1.2 parts of ferrous sulfate tetrahydrate, 1.4-1.8 parts of ferric trichloride hexahydrate, 1.5-2.5 parts of 80-mesh natural bamboo powder, 0.8-1.2 parts of polyethylene glycol, 2.5-3.5 parts of sodium acetate and 90-92 parts of ethylene glycol.
The preparation process of the magnetic bamboo fiber comprises the following steps:
(a) weighing ferrous sulfate tetrahydrate, ferric trichloride hexahydrate, sodium acetate and polyethylene glycol according to the weight parts of the components, pouring the ferrous sulfate tetrahydrate, the ferric trichloride hexahydrate, the sodium acetate and the polyethylene glycol into a beaker containing a certain amount of ethylene glycol solution, and stirring to obtain a mixed solution;
(b) carrying out ultrasonic treatment on the mixed solution;
(c) b, stirring the solution obtained in the step b at a certain temperature to fully dissolve the solution;
(d) weighing 80-mesh bamboo powder according with the required weight part, adding the bamboo powder into the solution obtained in the step c, and fully stirring;
(e) d, pouring the mixed solution obtained in the step d into a stainless steel reaction kettle with a polytetrafluoroethylene material as a lining, putting the stainless steel reaction kettle into a program-controlled box-type furnace for high-temperature reaction for a certain time, taking out the reaction kettle, and cooling to room temperature;
(f) and e, repeatedly washing the product obtained in the step e by using deionized water and ethanol, and drying the product in vacuum at the temperature of 60 ℃ to obtain the magnetic bamboo fiber material.
Wherein polyethylene glycol is used as a dispersing agent in the step (a); in the step (a), ethylene glycol is used as a solvent.
Further, carrying out ultrasonic treatment on the mixed solution in the step (b) for 15-30 min; in the step (c), the solution is stirred at the temperature of below 50 ℃ to be fully dissolved; in the step (e), the high temperature is 200 ℃, and the reaction time is 6-8 h.
The following is further illustrated with reference to specific examples:
example 1
The magnetic bamboo fiber material is prepared from ferrous sulfate tetrahydrate, ferric trichloride hexahydrate, 80-mesh natural bamboo powder, polyethylene glycol, sodium acetate and ethylene glycol. The preparation method comprises the following steps: weighing 0.8 part of ferrous sulfate tetrahydrate, 1.4 parts of ferric trichloride hexahydrate, 0.8 part of polyethylene glycol and 3.0 parts of sodium acetate in a small beaker, adding 60ml of ethylene glycol as a solvent, carrying out ultrasonic treatment for 15min, placing on a magnetic stirrer at 50 ℃ for stirring to fully dissolve the solution, weighing 1.5 parts by weight of 80-mesh natural bamboo powder, soaking in a ferric salt solution beaker which is fully dissolved, fully stirring, pouring the obtained mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, and (3) putting the mixture into a program-controlled box furnace, wherein the temperature is increased to 200 ℃ for reaction for 6 hours at the first temperature rise process of 5 ℃/min, taking out the reaction kettle after the temperature of the program-controlled box furnace is reduced to a safe temperature, filtering, repeatedly washing the obtained product with a large amount of deionized water and ethanol, and drying in vacuum at the temperature of 60 ℃ to obtain the magnetic bamboo fiber material.
Example 2
The magnetic bamboo fiber material is prepared from ferrous sulfate tetrahydrate, ferric trichloride hexahydrate, 80-mesh natural bamboo powder, polyethylene glycol, sodium acetate and ethylene glycol. The preparation method comprises the following steps: weighing 1 part by weight of ferrous sulfate tetrahydrate, 1.6 parts by weight of ferric trichloride hexahydrate, 1.0 part by weight of polyethylene glycol and 3.0 parts by weight of sodium citrate into a small beaker, adding 60ml of ethylene glycol as a solvent, carrying out ultrasonic treatment for 15min, placing on a magnetic stirrer at 50 ℃ for stirring to fully dissolve the solution, weighing 2.0 parts by weight of 80-mesh natural bamboo powder, soaking in a ferric salt solution beaker which is fully dissolved, fully stirring, pouring the obtained mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, and (3) putting the mixture into a program-controlled box furnace, wherein the temperature is increased to 200 ℃ for reaction for 7 hours at the first temperature rise process of 5 ℃/min, taking out the reaction kettle after the temperature of the program-controlled box furnace is reduced to a safe temperature, filtering, repeatedly washing the obtained product with a large amount of deionized water and ethanol, and drying in vacuum at the temperature of 60 ℃ to obtain the magnetic bamboo fiber material.
Example 3
The magnetic bamboo fiber material is prepared from ferrous sulfate tetrahydrate, ferric trichloride hexahydrate, 80-mesh natural bamboo powder, polyethylene glycol, sodium acetate and ethylene glycol. The preparation method comprises the following steps: weighing 1.2 parts by weight of ferrous sulfate tetrahydrate, 1.8 parts by weight of ferric trichloride hexahydrate, 1.2 parts by weight of polyethylene glycol and 3.5 parts by weight of sodium citrate into a small beaker, adding 60ml of ethylene glycol as a solvent, carrying out ultrasonic treatment for 15min, placing on a magnetic stirrer at 50 ℃ for stirring to fully dissolve the solution, weighing 2.5 parts by weight of 80-mesh natural bamboo powder, soaking in a ferric salt solution beaker which is fully dissolved, fully stirring, pouring the obtained mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, and (3) putting the mixture into a program-controlled box furnace, wherein the temperature is increased to 200 ℃ for reaction for 8 hours at the first temperature rise process of 5 ℃/min, taking out the reaction kettle after the temperature of the program-controlled box furnace is reduced to a safe temperature, filtering, repeatedly washing the obtained product with a large amount of deionized water and ethanol, and drying in vacuum at the temperature of 60 ℃ to obtain the magnetic bamboo fiber material.
The appearance of the magnetic bamboo fiber material obtained by the proportioning and processing method under a scanning electron microscope is shown in figure 1, the appearance of the magnetic bamboo fiber under a transmission electron microscope is shown in figure 2, the convergence condition of the magnetic bamboo fiber under a magnet is shown in figure 3, and the hysteresis loop of the magnetic bamboo fiber is shown in figure 4.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The magnetic bamboo fiber is characterized by being prepared from the following components in parts by weight: 0.8-1.2 parts of ferrous sulfate tetrahydrate, 1.4-1.8 parts of ferric trichloride hexahydrate, 1.5-2.5 parts of 80-mesh natural bamboo powder, 0.8-1.2 parts of polyethylene glycol, 2.5-3.5 parts of sodium acetate and 90-92 parts of ethylene glycol, wherein the natural bamboo powder is prepared by directly firing and crushing bamboo fibers.
2. The preparation process of the magnetic bamboo fiber is characterized by comprising the following steps of:
(a) weighing ferrous sulfate tetrahydrate, ferric trichloride hexahydrate, sodium acetate and polyethylene glycol according to the weight parts of the components, pouring the ferrous sulfate tetrahydrate, the ferric trichloride hexahydrate, the sodium acetate and the polyethylene glycol into a beaker containing a certain amount of ethylene glycol solution, and stirring to obtain a mixed solution;
(b) carrying out ultrasonic treatment on the mixed solution;
(c) b, stirring the solution obtained in the step b at a certain temperature to fully dissolve the solution;
(d) weighing 80-mesh bamboo powder according with the required weight part, adding the bamboo powder into the solution obtained in the step c, and fully stirring;
(e) d, pouring the mixed solution obtained in the step d into a stainless steel reaction kettle with a polytetrafluoroethylene material as a lining, putting the stainless steel reaction kettle into a program-controlled box-type furnace for high-temperature reaction for a certain time, taking out the reaction kettle, and cooling to room temperature;
(f) and e, repeatedly washing the product obtained in the step e by using deionized water and ethanol, and drying the product in vacuum at the temperature of 60 ℃ to obtain the magnetic bamboo fiber material.
3. The process for preparing magnetic bamboo fiber according to claim 2, wherein polyethylene glycol is used as dispersant in the step (a).
4. The process for preparing magnetic bamboo fiber according to claim 2, wherein ethylene glycol is used as solvent in the step (a).
5. The preparation process of the magnetic bamboo fiber according to claim 2, wherein the mixed solution in the step (b) is subjected to ultrasonic treatment for 15-30 min.
6. The process for preparing magnetic bamboo fiber as claimed in claim 2, wherein in the step (c), the solution is stirred at 50 ℃ or lower to fully dissolve.
7. The process for preparing magnetic bamboo fiber according to claim 2, wherein the high temperature in the step (e) is 200 ℃.
8. The process for preparing magnetic bamboo fiber according to claim 2, wherein the reaction time in the step (e) is 6-8 h.
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| CN113044837A (en) * | 2021-02-04 | 2021-06-29 | 东华理工大学 | Magnetic phosphoric acid activated bamboo charcoal composite material and preparation process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113044837A (en) * | 2021-02-04 | 2021-06-29 | 东华理工大学 | Magnetic phosphoric acid activated bamboo charcoal composite material and preparation process thereof |
| CN113044837B (en) * | 2021-02-04 | 2022-06-24 | 东华理工大学 | Magnetic phosphoric acid activated bamboo charcoal composite material and preparation process thereof |
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