CN108144582A - A kind of preparation method of biomass-based magnetic active carbon and the magnetic active carbon of preparation - Google Patents
A kind of preparation method of biomass-based magnetic active carbon and the magnetic active carbon of preparation Download PDFInfo
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- CN108144582A CN108144582A CN201711453299.6A CN201711453299A CN108144582A CN 108144582 A CN108144582 A CN 108144582A CN 201711453299 A CN201711453299 A CN 201711453299A CN 108144582 A CN108144582 A CN 108144582A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
- B01J20/0296—Nitrates of compounds other than those provided for in B01J20/04
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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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- 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
- B01J20/28—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
Abstract
A kind of method for preparing magnetic active carbon and the magnetic active carbon prepared by this method, method include taking certain mass ZnCl2Be dissolved in the water to obtain solution A, takes Fe (NO3)3·9H2O, dodecyl trimethyl ammonium chloride is dissolved in water by certain mass ratio and water-bath half an hour obtains solution B under the conditions of 80 DEG C, abandoned biomass is impregnated in A, B mixed solution to be put into 105 DEG C of baking ovens after a period of time and is dried, certain mass material drying is weighed and is placed in resistance furnace activation a period of time under certain system pressure, activation temperature.Product is taken out after experiment, half an hour is boiled in boiling water, filtered, dry when being washed to neutrality with deionized water, grinding up to magnetic active carbon.This method has many advantages, such as that preparation process is simple, of low cost, and the magnetic active carbon prepared has the characteristics that have excellent magnetic characteristics, magnetisable material is not easily to fall off, good adsorption performance.
Description
Technical field
A kind of preparation method the present invention relates to magnetic active carbon and the magnetic active carbon by this method preparation.
Background technology
Agriculture and forestry organic waste material derives from plant, is mainly made of C, H, O, N etc., is the product of photosynthesis of plant, has
Recyclability, sustainability.China is an agricultural and forestry production big country, and agricultural are resourceful, and in China, agriculture and forestry organic waste material is in addition to one
Part is used for generating electricity etc. outside recovery energies, and also a big chunk abandoned or burning is prepared using abandoned biomass
Activated carbon can not only reduce environmental pressure, can also increase economic benefit.
Activated carbon because its high-specific surface area, abundant pore structure, excellent absorption property are widely used in every field,
Such as medical treatment and pharmacy, Chemical Manufacture, environmental pollution etc..But when activated carbon applies to these fields, often there is recycling difficulties
Problem, the method for the recovered carbon of extensive utilization is mainly the precipitation method and floatation at present, these methods can only recycle big
Grain activated carbon, but it is bad for the recovering effect of little particle activated carbon, and water body can be caused by having adsorbed the activated carbon of harmful substance
Secondary pollution increases environmental pressure.Magnetic separation technology passes through the development of more than 40 years, technology relative maturity, but activated carbon one
As do not have magnetism, activated carbon is assigned into magnetic, make activated carbon have magnetism, using magnetic method recovered carbon, this method is not only grasped
Make simply, and the rate of recovery of activated carbon is very high, it is possible to prevente effectively from secondary pollution problem of the activated carbon to water body.But system both at home and abroad
Standby magnetic active carbon inventive technique is more complicated, and production cost is high, and magnetisable material easily comes off.Such as number of patent application
201410596141.4, entitled " preparation method of eucalyptus base magnetic active carbon ", number of patent application 201410145644.X, name
Referred to as " a kind of preparation method of biomass-based magnetic active carbon ".The method that magnetic active carbon is prepared disclosed in first patent
For：First eucalyptus block is carbonized, then eucalyptus charcoal and activator magnetism agent are mixed in a certain ratio, is dried after time of infusion
Dry be put into the Muffle furnace that temperature is 600~900 DEG C activates 60~120min, and washing, dry, grinding obtain the work of eucalyptus base magnetism
Property charcoal.Technical method disclosed in second patent is：Agriculture and forestry organic waste material is carbonized to obtain charcoal through limiting oxygen pyrolysis or hydro-thermal
Matrix, then in polyhydric alcohol solutions, by iron precursor pyrolytic into magnetic Nano material Fe3O4Back loading is in biological carbon matrix
On, it is sintered magnetic nanoparticle is made under nitrogen protection.Both the above method all prepares magnetic active carbon using " two-step method ",
And the temperature that preparation process needs is all very high, not only preparation process is complicated, but also high preparation temperature is considerably increased and is produced into
This.For another example number of patent application is 200910077154.X, entitled：" a kind of preparation method of magnetic active carbon and the magnetism are living
Property charcoal ", the method that magnetic active carbon is prepared described in the patent are：First coal raw materials, magnetic additive, binding agent and surface are lived
Property agent be sufficiently mixed resulting mixture, extrusion forming and drying, then dried molding is subjected to charcoals in 400~700 DEG C of temperature
Carbide is made in change processing, carbide activation then is prepared into magnetic active carbon at a temperature of 700~1000 DEG C, this method makes
With binding agent, plug-hole is be easy to cause, and then reduce the absorption property of activated carbon.
In conclusion preparing magnetic active carbon at present is primarily present preparation temperature height not enough economy, preparation process complexity
The problems such as bad magnetisable material of magnetic active carbon magnetic property that is not easy to operate, preparing is easy to fall off, absorption property is bad.Although at present
There is research invention one-step method to prepare magnetic active carbon, but be all first with activator impregnated raw material, then and magnetic in impregnated raw material
Agent mixes, then material drying, and due to preparing Magnetic reagent when needs a certain amount of water dissolution magnetism agent and surfactant, dries this
Part water can consume more times and the energy.
Invention content
In view of disadvantage mentioned above, under vacuum prepared by step activation magnetized biological matter using simpler preparation process by the present invention
Magnetic active carbon, it is therefore an objective to simplify preparation process, it is energy saving, production cost is reduced, preparing has magnetic property stabilization, magnetic material
Matter is not easily to fall off, the magnetic active carbon of good adsorption performance.
The invention is realized by the following technical scheme：
1) by the washing of discarded cedar sawdust, it is dry, crushed it is spare after 20 mesh molecular sieves.
2) magnetic agent and surfactant in mass ratio 1 are weighed：2 are dissolved in the water, and are put into water-bath one in 80 DEG C of water-baths
Section time obtained solution A.
3) certain mass ZnCl is taken2It is dissolved in the water, a small amount of hydrochloric acid is added to prevent ZnCl2Hydrolysis, obtained solution B.
Solution A is mixed into obtain solution C with solution B.Cedar sawdust in step 1 is impregnated in solution C, a small amount of water is added to make China fir
Sawdust is sufficiently impregnated, and is stirred evenly.It places and obtains raw material D for a period of time.
4) raw material D is put into 105 DEG C of baking ovens and dried.
5) drying material D in step 4 is placed in self-control resistance furnace, 10~50KPa of control pressure sets activation temperature
400~600 DEG C, activate 0~120min.It takes out, crushes after cooling, be put into boiling water and boil a period of time, with deionized water repeatedly
Washing, until the aqueous solution pH after washing is about 7.Ground 200 mesh molecular sieve after 120 DEG C of dryings, obtains magnetic active carbon.
The present invention has the following advantages compared with preparing the technical matters of magnetic active carbon in the past：One, under vacuum
It is relatively low to prepare the required activation temperature of magnetic active carbon, can effectively save the energy, reduces production cost, and equipment is wanted
It asks and is relatively low, there is pernicious gas generation in reaction process, can extract out in time, avoid environmental pollution；Two, by biomass
It is directly mixed with dipping with activator, Magnetic reagent, not only simplifies processing step, and because hybrid infusion reduces dipping water,
Save the energy needed for material drying moisture and time, it is often more important that, magnetic agent is impregnated into inside biomass, magnetic history
In, magnetic agent is made fully to be reacted with carbonaceous, the magnetisable material of generation is combined more secured with activated carbon, and magnetic property is more stable；Three, Fe
(NO3)3Start to decompose for 125 DEG C under normal pressure, under vacuum, decomposition temperature is lower, and Fe (NO3)3It decomposes and generates a part of gas
Body can effectively facilitate micropore generation, enhance the absorption property of activated carbon；Four, dodecyl trimethyl ammonium chloride has chemistry
The characteristics of stability is good, heat-resisting, strong alkali-acid resistance, permeance property is excellent, using dodecyl trimethyl ammonium chloride as surface-active
Agent makes activated carbon have more excellent magnetic property.
Specific embodiment
Embodiment 1
Take magnetic agent Fe (NO3)3·9H2O 0.75g and surfactant sodium dodecyl base trimethyl ammonium chloride 1.5g is added in
40ml water dissolutions are put into water-bath half an hour obtained solution A in 80 DEG C of water-baths；It weighs 18g zinc chloride to be dissolved in 30ml water, and adds
Enter 3ml concentrated hydrochloric acids, prevent zinc chloride from hydrolyzing, obtained solution B；Solution A is mixed with B solution, obtained solution C；Weigh 10g China firs
Bits, cedar sawdust is impregnated in solution C, and adds 10ml water, is sufficiently stirred, is uniformly mixed raw material, beaker is sealed with preservative film
Mouth places 24 hours to obtain raw material D；Raw material is put into 105 DEG C of baking ovens after 24 hours and is dried.Drying material is placed in self-control resistance
Furnace apparatus activates, and 500 DEG C of activation temperature of setting, control system pressure are 10KPa, and soak time 60min takes out after cooling,
It smashs to pieces, 30min is boiled in boiling water, washed repeatedly with deionized water, until when aqueous solution pH is 7, filtering is roused in 120 DEG C of electric heating
It is dried in wind drying box, ground 200 mesh molecular sieve, magnetic active carbon is made.Magnetic active carbon iodine sorption value is after testing
934.85mg/g, methylene blue adsorption value 320.82mg/g are 0.58emu/g than saturation magnetic intensity.
Embodiment 2
Take magnetic agent Fe (NO3)3·9H2O 1.25g and surfactant sodium dodecyl base trimethyl ammonium chloride 2.5g is added in
40ml water dissolutions are put into water-bath half an hour obtained solution A in 80 DEG C of water-baths；It weighs 18g zinc chloride to be dissolved in 30ml water, and adds
Enter 3ml concentrated hydrochloric acids, prevent zinc chloride from hydrolyzing, obtained solution B；Solution A is mixed with B solution, obtained solution C；Weigh 10g China firs
Bits, cedar sawdust is impregnated in solution C, and adds 10ml water, is sufficiently stirred, is uniformly mixed raw material, beaker is sealed with preservative film
Mouth places 24 hours to obtain raw material D；Raw material is put into 105 DEG C of baking ovens after 24 hours and is dried.Drying material is placed in self-control resistance
Furnace apparatus activates, and 500 DEG C of activation temperature of setting, control system pressure are 10KPa, and soak time 30min takes out after cooling,
It smashs to pieces, 30min is boiled in boiling water, washed repeatedly with deionized water, until when aqueous solution pH is 7, filtering is roused in 120 DEG C of electric heating
It is dried in wind drying box, ground 200 mesh molecular sieve, magnetic active carbon is made.Magnetic active carbon iodine sorption value is after testing
869.2mg/g, methylene blue adsorption value 297.47mg/g are 1.24emu/g than saturation magnetic intensity.
Embodiment 3
Take magnetic agent Fe (NO3)3·9H2O 1.0g and surfactant sodium dodecyl base trimethyl ammonium chloride 2.0g is added in
40ml water dissolutions are put into water-bath half an hour obtained solution A in 80 DEG C of water-baths；It weighs 18g zinc chloride to be dissolved in 30ml water, and adds
Enter 3ml concentrated hydrochloric acids, prevent zinc chloride from hydrolyzing, obtained solution B；Solution A is mixed with B solution, obtained solution C；Weigh 10g China firs
Bits, cedar sawdust is impregnated in solution C, and adds 10ml water, is sufficiently stirred, is uniformly mixed raw material, beaker is sealed with preservative film
Mouth places 24 hours to obtain raw material D；Raw material is put into 105 DEG C of baking ovens after 24 hours and is dried.Drying material is placed in self-control resistance
Furnace apparatus activates, and 500 DEG C of activation temperature of setting, control system pressure are 10KPa, and soak time 60min takes out after cooling,
It grinds, 30min is boiled in boiling water, is washed repeatedly with deionized water, until when aqueous solution pH is 7, filtering is roused in 120 DEG C of electric heating
It is dried in wind drying box, ground 200 mesh molecular sieve, magnetic active carbon is made.Magnetic active carbon iodine sorption value is after testing
930.52mg/g, methylene blue adsorption value 311.05mg/g are 0.91emu/g than saturation magnetic intensity.
Embodiment 4
Take magnetic agent Fe (NO3)3·9H2O 1.5g and surfactant sodium dodecyl base trimethyl ammonium chloride 3.0g is added in
40ml water dissolutions are put into water-bath half an hour obtained solution A in 80 DEG C of water-baths；It weighs 18g zinc chloride to be dissolved in 30ml water, and adds
Enter 3ml concentrated hydrochloric acids, prevent zinc chloride from hydrolyzing, obtained solution B；Solution A is mixed with B solution, obtained solution C；Weigh 10g China firs
Bits, cedar sawdust is impregnated in solution C, and adds 10ml water, is sufficiently stirred, is uniformly mixed raw material, beaker is sealed with preservative film
Mouth places 24 hours to obtain raw material D；Raw material is put into 105 DEG C of baking ovens after 24 hours and is dried.Drying material is placed in self-control resistance
Furnace apparatus activates, and 500 DEG C of activation temperature of setting, control system pressure are 10KPa, and soak time 60min takes out after cooling,
It smashs to pieces, 30min is boiled in boiling water, washed repeatedly with deionized water, until when aqueous solution pH is 7, filtering is roused in 120 DEG C of electric heating
It is dried in wind drying box, ground 200 mesh molecular sieve, magnetic active carbon is made.Magnetic active carbon iodine sorption value is after testing
847.87mg/g, methylene blue adsorption value 287.16mg/g are 2.17emu/g than saturation magnetic intensity.
Embodiment 5
Take magnetic agent Fe (NO3)3·9H2O 1.25g and surfactant sodium dodecyl base trimethyl ammonium chloride 2.5g is added in
40ml water dissolutions are put into water-bath half an hour obtained solution A in 80 DEG C of water-baths；It weighs 18g zinc chloride to be dissolved in 30ml water, and adds
Enter 3ml concentrated hydrochloric acids, prevent zinc chloride from hydrolyzing, obtained solution B；Solution A is mixed with B solution, obtained solution C；Weigh 10g China firs
Bits, cedar sawdust is impregnated in solution C, and adds 10ml water, is sufficiently stirred, is uniformly mixed raw material, beaker is sealed with preservative film
Mouth places 24 hours to obtain raw material D；Raw material is put into 105 DEG C of baking ovens after 24 hours and is dried.Drying material is placed in self-control resistance
Furnace apparatus activates, and 500 DEG C of activation temperature of setting, control system pressure are 10KPa, and soak time 90min takes out after cooling,
It smashs to pieces, 30min is boiled in boiling water, washed repeatedly with deionized water, until when aqueous solution pH is 7, filtering is roused in 120 DEG C of electric heating
It is dried in wind drying box, ground 200 mesh molecular sieve, magnetic active carbon is made.Magnetic active carbon iodine sorption value is after testing
912.36mg/g, methylene blue adsorption value 287.16mg/g are 1.25emu/g than saturation magnetic intensity.
Embodiment 6
Take magnetic agent Fe (NO3)3·9H2O 1.25g and surfactant sodium dodecyl base trimethyl ammonium chloride 2.5g is added in
40ml water dissolutions are put into water-bath half an hour obtained solution A in 80 DEG C of water-baths；It weighs 18g zinc chloride to be dissolved in 30ml water, and adds
Enter 3ml concentrated hydrochloric acids, prevent zinc chloride from hydrolyzing, obtained solution B；Solution A is mixed with B solution, obtained solution C；Weigh 10g China firs
Bits, cedar sawdust is impregnated in solution C, and adds 10ml water, is sufficiently stirred, is uniformly mixed raw material, beaker is sealed with preservative film
Mouth places 24 hours to obtain raw material D；Raw material is put into 105 DEG C of baking ovens after 24 hours and is dried.Drying material is placed in self-control resistance
Furnace apparatus activates, and 550 DEG C of activation temperature of setting, control system pressure are 10KPa, and soak time 60min takes out after cooling,
It smashs to pieces, 30min is boiled in boiling water, washed repeatedly with deionized water, until when aqueous solution pH is 7, filtering is roused in 120 DEG C of electric heating
It is dried in wind drying box, ground 200 mesh molecular sieve, magnetic active carbon is made.Magnetic active carbon iodine sorption value is after testing
827.94mg/g, methylene blue adsorption value 256.76mg/g are 1.3emu/g than saturation magnetic intensity.
Embodiment 7
Take magnetic agent Fe (NO3)3·9H2O 1.25g and surfactant sodium dodecyl base trimethyl ammonium chloride 2.5g is added in
40ml water dissolutions are put into water-bath half an hour obtained solution A in 80 DEG C of water-baths；It weighs 18g zinc chloride to be dissolved in 30ml water, and adds
Enter 3ml concentrated hydrochloric acids, prevent zinc chloride from hydrolyzing, obtained solution B；Solution A is mixed with B solution, obtained solution C；Weigh 10g China firs
Bits, cedar sawdust is impregnated in solution C, and adds 10ml water, is sufficiently stirred, is uniformly mixed raw material, beaker is sealed with preservative film
Mouth places 24 hours to obtain raw material D；Raw material is put into 105 DEG C of baking ovens after 24 hours and is dried.Drying material is placed in self-control resistance
Furnace apparatus activates, and 600 DEG C of activation temperature of setting, control system pressure are 10KPa, and soak time 60min takes out after cooling,
It smashs to pieces, 30min is boiled in boiling water, washed repeatedly with deionized water, until when aqueous solution pH is 7, filtering is roused in 120 DEG C of electric heating
It is dried in wind drying box, ground 200 mesh molecular sieve, magnetic active carbon is made.Magnetic active carbon iodine sorption value is after testing
808.69mg/g, methylene blue adsorption value 248.61mg/g are 2.33emu/g than saturation magnetic intensity.
Claims (8)
1. a kind of preparation method of biomass-based magnetic active carbon, it is characterised in that magnetic is prepared as one step of raw material using discarded cedar sawdust
Property activated carbon, includes the following steps：
It 1) will be spare after abandoned biomass such as cedar sawdust washing, dry, crushing；
2) by magnetic agent and surfactant in mass ratio 1:2 is soluble in water, under the conditions of 80 DEG C water-bath for a period of time solution
A；
3) certain mass ZnCl is weighed2, it is dissolved in 30ml water, obtained solution B；
4) step 2 is mixed into obtain solution C with solution in step 3, cedar sawdust in step 1 is placed in solution C, stirred evenly, soaked
Stain obtains raw material D afterwards for a period of time, then dries in an oven；
5) drying material D is put into homemade activation device, setting certain pressure, activation temperature activate certain time.It will be living
Product after change magnetization, which is placed in boiling water, boils a period of time, is washed with deionized, and after drying, then obtains the magnetic activity of product
Charcoal.
2. according to the method described in claim 1, its characterization method, magnetic agent is Fe (NO in being 2)3)3·9H2O, surface are lived
Property agent be dodecyl trimethyl ammonium chloride.
3. according to the method described in claim 1, its characterization method, water bath time is 20min~40min in being 2).
4. according to the method described in claim 1, its characterization method, the ZnCl weighed in being 3)2Quality is 18g.
5. according to the method described in claim 1, its characterization method, dip time is 18~36 hours in being 4).
6. according to the method described in claim 1, its characterization method, system pressure is 10KPa~50KPa in being 5).
7. according to the method described in claim 1, its characterization method, activation temperature is 400 DEG C~600 DEG C in being 5).
8. according to the method described in claim 1, its characterization method, soak time is 0min~120min in being 5).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108940317A (en) * | 2018-08-21 | 2018-12-07 | 三明学院 | A kind of Fe3O4@C-CoS-TiO2Composite photo-catalyst and preparation method thereof |
| CN110433791A (en) * | 2019-08-09 | 2019-11-12 | 宜兴国际环保城科技发展有限公司 | A kind of magnetic catalyst preparation method applied to tubular type free-radical oxidation |
| CN110577219A (en) * | 2019-09-29 | 2019-12-17 | 南京工程学院 | Magnetic sludge straw-based activated carbon and preparation method thereof |
| CN111569949A (en) * | 2020-04-15 | 2020-08-25 | 江苏大学 | Preparation method and application of magnetic temperature-sensitive imprinting material for microwave-initiated polymerization |
| CN112169755A (en) * | 2020-09-24 | 2021-01-05 | 武汉理工大学 | Preparation method of hydrothermally synthesized zinc chloride activated magnetic sludge biochar applied to tetracycline removal in water |
-
2017
- 2017-12-28 CN CN201711453299.6A patent/CN108144582A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108940317A (en) * | 2018-08-21 | 2018-12-07 | 三明学院 | A kind of Fe3O4@C-CoS-TiO2Composite photo-catalyst and preparation method thereof |
| CN110433791A (en) * | 2019-08-09 | 2019-11-12 | 宜兴国际环保城科技发展有限公司 | A kind of magnetic catalyst preparation method applied to tubular type free-radical oxidation |
| CN110577219A (en) * | 2019-09-29 | 2019-12-17 | 南京工程学院 | Magnetic sludge straw-based activated carbon and preparation method thereof |
| CN111569949A (en) * | 2020-04-15 | 2020-08-25 | 江苏大学 | Preparation method and application of magnetic temperature-sensitive imprinting material for microwave-initiated polymerization |
| CN111569949B (en) * | 2020-04-15 | 2023-12-15 | 深圳万知达科技有限公司 | Preparation method and application of magnetic temperature-sensitive imprinting material polymerized by microwave initiation |
| CN112169755A (en) * | 2020-09-24 | 2021-01-05 | 武汉理工大学 | Preparation method of hydrothermally synthesized zinc chloride activated magnetic sludge biochar applied to tetracycline removal in water |
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Application publication date: 20180612 |