CN107081123A - Magnetic magnesium hydroxide adsorbent and preparation method thereof - Google Patents
Magnetic magnesium hydroxide adsorbent and preparation method thereof Download PDFInfo
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- CN107081123A CN107081123A CN201710385926.0A CN201710385926A CN107081123A CN 107081123 A CN107081123 A CN 107081123A CN 201710385926 A CN201710385926 A CN 201710385926A CN 107081123 A CN107081123 A CN 107081123A
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- magnesium hydroxide
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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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
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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
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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
- B01J20/28054—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 surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
- B01J20/28059—Surface area, e.g. B.E.T specific surface area being less than 100 m2/g
-
- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
Abstract
The invention discloses a kind of magnetic magnesium hydroxide adsorbent and preparation method thereof.The magnetic magnesium hydroxide adsorbent is using porous magnesium hydroxide to be carrier loaded and filled with nanometer Fe3O4Particle.NaOH solution is added dropwise to containing MgSO by preparation method including (1)4Microemulsion system in, prepare porous magnesium hydroxide；(2) porous magnesium hydroxide carrier is dissolved in absolute ethyl alcohol, ultrasonic disperse, adds iron salt solutions, under inert gas shielding and stirring condition, regulation gained pH of mixed obtains magnetic magnesium hydroxide adsorbent to 10~11.Preparation method technique of the invention is simple, cost is low, and obtained adsorbent heavy metal, organic pollution have very strong absorption property, and have the advantages such as adsorption capacity is big, can be easily separated.
Description
Technical field
The invention belongs to environment functional material field, and in particular to a kind of magnetic magnesium hydroxide adsorbent and its preparation side
Method.
Background technology
With industrial expansion, from industries such as plating, mining and metallurgy, process hides, dye (painting) material, agricultural chemicals and medicine containing a huge sum of money
All kinds of waste water of category or organic pollution cause serious harm to environment, while the serious life security for threatening people.
Therefore, the pollutant how removed in waste water seems increasingly important during water pollution control and aquatic ecological restoration.Absorption method
Because its is simple to operate, cost is low, safety, gentle reaction condition the advantages of and deep in water treatment procedure favored by everybody.
Magnesium hydroxide because it is in alkalescence and shock-absorbing capacity is good, and be widely used in the absorption to acidic materials (in
With).Recent studies indicate that, the active big, high adsorption capacity of magnesium hydroxide, do not possess corrosivity, safe and nontoxic, nothing
Evil, and be widely used in decolorizing printing and dyeing waste water, removal of heavy metal ions, removing phosphate and take off the field such as ammonium and flue gas desulfurization.But,
Magnesium hydroxide deposits the characteristics of coherency is strong between particles simultaneously so that it easily assembles in wastewater treatment process, reduces ratio
Surface area, so as to influence adsorption effect to a certain extent.
It is well known that determining the performance of sorbing material includes its specific surface area size, surface property (functional group, electric charge shape
State and quantity).At the same time, after the completion of adsorption reaction, the separation that adsorbent and waste water how are realized easily is also absorption method
One focus of concern.Nano material gets more and more people's extensive concerning because of its big specific surface area and high adsorption capacity, but will
Application of micron is separated into a problem in water process.Therefore, the performance of the adsorbent that a kind of technique is simple, prepare is studied
The preparation method for the novel magnesium hydroxide adsorbent got well and can be easily separated from the water has a good application prospect.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art there is provided a kind of adsorption capacity height, adsorb speed
The magnetic adsorption of magnesium hydroxide that degree is fast, has strong removal ability to the heavy metal or organic pollution in waste water and is easily isolated and recycled
Agent, and a kind of preparation method of simple, the with low cost magnetic magnesium hydroxide adsorbent of technique is accordingly provided.
In order to solve the above-mentioned technical problem, the present invention uses following technical scheme：
A kind of magnetic magnesium hydroxide adsorbent, the magnetic magnesium hydroxide adsorbent is using porous magnesium hydroxide to be carrier loaded
And filled with Fe3O4Nano-particle.
In above-mentioned magnetic magnesium hydroxide adsorbent, it is preferred that the specific surface area of the magnetic magnesium hydroxide adsorbent is
67.3436±0.1699m2/ g, the specific surface area of the porous magnesium hydroxide is 63.0366 ± 0.3732m2/g。
As a total technical concept, the present invention also provides a kind of preparation method of magnetic magnesium hydroxide adsorbent, wraps
Include following steps：
(1) prepared by carrier：Under continuous stirring, NaOH solution is added dropwise to containing MgSO4Microemulsion system in, be added dropwise
After complete, continue to stir, then stand aging, products therefrom is rinsed repeatedly after being neutrality, drying to pH, obtain porous hydrogen-oxygen
Change magnesium；
(2) load：The porous magnesium hydroxide that step (1) is obtained is added in absolute ethyl alcohol, after ultrasonic disperse, adds iron
Salting liquid, is stirred under inert gas shielding, obtains mixed liquor, and the pH value of mixed liquor is adjusted to 10~11, continues to stir, so
After stand aging, it is neutrality products therefrom to be rinsed repeatedly to pH, after drying, obtains magnetic magnesium hydroxide adsorbent.
In the preparation method of above-mentioned magnetic magnesium hydroxide adsorbent, it is preferred that in the step (1), the NaOH is molten
Liquid is with containing MgSO4Microemulsion system volume ratio be 1: 1, the NaOH and MgSO4Mol ratio be 2: 1, the microemulsion system is
The volume ratio of the aqueous solution of propyl alcohol, propyl alcohol and water is 15~20: 80~85.
In the preparation method of above-mentioned magnetic magnesium hydroxide adsorbent, it is preferred that described persistently to stir in the step (1)
The speed mixed is 400rpm~600rpm, and the speed of continuation stirring is 180rpm~300rpm, the continuation stirring when
Between be 4h~6h, time of the standing aging is 12h~24h.
In the preparation method of above-mentioned magnetic magnesium hydroxide adsorbent, it is preferred that in the step (1), using water and second
Alcohol is alternately and repeatedly rinsed to the product, and the temperature of the drying is 40 DEG C~60 DEG C.
In the preparation method of above-mentioned magnetic magnesium hydroxide adsorbent, it is preferred that in the step (2), the porous hydrogen
Magnesia, absolute ethyl alcohol, the ratio of iron salt solutions are 1g~2g: 50mL~80mL: 200mL~250mL；The iron salt solutions are
The mixed aqueous solution of ferrous sulfate and iron chloride, the mol ratio of the ferrous sulfate and iron chloride is 1: 2~3, described in every milliliter
The content of ferro element (including ferrous iron and ferric iron) is 0.9mg~3.6mg in iron salt solutions.
In the preparation method of above-mentioned magnetic magnesium hydroxide adsorbent, it is preferred that in the step (2), the ultrasound point
The scattered time is 5min~8min.
In the preparation method of above-mentioned magnetic magnesium hydroxide adsorbent, it is preferred that in the step (2), the indifferent gas
When being stirred under body protection, mixing speed is 200rpm~400rpm, and mixing time is 20min~40min；It is described to continue to stir
The speed mixed is 180rpm~300rpm, and time of continuation stirring is 1h~2h, time of the standing aging for 12h~
24h。
In the preparation method of above-mentioned magnetic magnesium hydroxide adsorbent, it is preferred that in the step (2), using water and second
Alcohol is rinsed repeatedly to the product, and the temperature of the drying is 60 DEG C~80 DEG C.
Technical scheme prepares porous magnesium hydroxide in microemulsion system, its object is to obtain it is porous, compare table
The big magnesium hydroxide carrier of area, so as to improve the adsorption capacity of material.Also pass through molysite in the preparation process of the sorbing material
Solution is sufficiently mixed with magnesium hydroxide carrier, one-step synthesis nanometer Fe3O4Magnetic component, so that adsorbent has magnetic material
The characteristic of material, can quickly and effectively realize that adsorbent is separated with reaction solution under additional magnetic fields.
Compared with prior art, the advantage of the invention is that：
1st, the preparation process of magnetic magnesium hydroxide adsorbent of the invention is simple and easy to apply, it is easy to control, with short production cycle, production
The product rate of recovery is high, and with low cost, technology versatility is good.
2nd, magnetic magnesium hydroxide adsorbent of the invention efficiently solves lacking present in existing magnesium hydroxide adsorbent
Fall into, sorbent treatment object (pollutant) has popularity, absorption property is good, it is easy to accomplish the separation with waste water, be easy to reclaim
Valuable pollutant.
Brief description of the drawings
Fig. 1 is microstructure of the magnetic magnesium hydroxide adsorbent under electron scanning Electronic Speculum made from the embodiment of the present invention 1
Photo.
Fig. 2 is the energy spectrum diagram of magnetic magnesium hydroxide adsorbent made from the embodiment of the present invention 1.
Fig. 3 is that magnetic magnesium hydroxide adsorbent made from the embodiment of the present invention 1 divides under additional magnetic fields from waste water
From effect photo.
Embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
Limit the scope of the invention.
Material and instrument employed in following examples are commercially available.
Embodiment 1：
A kind of magnetic magnesium hydroxide adsorbent of the invention, the magnetic magnesium hydroxide adsorbent include porous magnesium hydroxide and
Fe3O4Nano-particle, magnetic magnesium hydroxide adsorbent is using porous magnesium hydroxide as carrier, and porous magnesium hydroxide is loaded and is filled with
Fe3O4Nano-particle.
A kind of preparation method of the magnetic magnesium hydroxide adsorbent of above-mentioned the present embodiment, comprises the following steps：
(1) preparation of magnesium hydroxide carrier：In the case where speed stirs for 500rpm Fast Persistence, will isometric (be specially
The NaOH solution of 1mol/L 100mL) is added dropwise to 0.5mol/L (MgSO4Concentration) contain MgSO4Microemulsion system in, drop
After adding, continue to stir 6h under 200rpm speed, stand aging 24h, product is alternately and repeatedly rinsed to pH with water and ethanol
For neutrality, in 50 DEG C of drying, porous magnesium hydroxide carrier is obtained；Containing MgSO4Microemulsion system in, microemulsion system medium be propyl alcohol
The aqueous solution, C3H8O3Volume ratio with water is 15: 85.After tested, the specific surface area of porous magnesium hydroxide be 63.0366 ±
0.3732m2/ g, average pore size is 1.93nm, and average grain diameter is 95.2nm.The hole of porous magnesium hydroxide is mainly the recessed of surface
Hole, hole.
(2) load：Weigh 0.915g FeSO4·7H2O and 1.665g FeCl3·6H2O is dissolved in 200mL deoxidized waters, is stood
Lead to N2Protection, iron salt solutions are made in being stirred at 65 DEG C with 300rpm speed.The porous hydroxide for taking 1g steps (1) to obtain
Magnesium carrier is added in 50mL absolute ethyl alcohols, ultrasonic disperse 5min, is then added to (sustainable in the iron salt solutions of foregoing preparation
65 DEG C of foregoing heating stirrings), in N230min is stirred with 200rpm under protection, closing is heated to temperature less than or equal to 40 DEG C.
Gained pH of mixed is adjusted to 10~11 with NaOH solution, is continued to stir 1h with 200rpm, aging 24h is stood, by products therefrom
It is neutral alternately and repeatedly to be rinsed with water and ethanol to pH, in 80 DEG C of drying, obtains magnetic magnesium hydroxide adsorbent.As shown in figure 1,
Adsorbent surface is coarse, in stacking, cratered, loose structure, and the structure is conducive to the absorption and retention to pollutant.The adsorbent
Element constitute as shown in Figure 2 (energy spectrum diagram), the adsorbent contains substantial amounts of Fe, illustrates Fe3O4Successfully loaded to adsorbent
It is interior.After measured, the average pore size of the magnetic magnesium hydroxide adsorbent is 1.96nm, and specific surface area is 67.36m2/g(67.3436
±0.1699m2In/g range), average grain diameter is 89.1nm.
For the adsorption effect for the magnetic magnesium hydroxide adsorbent for investigating the present invention, following experiment has been carried out：
Added into the waste water containing tetracycline in magnetic magnesium hydroxide adsorbent made from above-mentioned the present embodiment, every liter of waste water
Adsorbent addition be 0.2g, the pH of reaction system is 6.0, and oscillating reactions 24h, magnetic is used after the completion of reaction at ambient temperature
Iron holds adsorbent composite material, separation material and waste water, completes the processing to tetracycline in waste water.
After tested, in the range of finite concentration (120~400mg/L), adsorbent of the present invention to the adsorbance of tetracycline with
The rise of tetracycline initial concentration and increase, when tetracycline initial concentration be 120mg/L when, tetracycline adsorbance be 91.0mg/
G, when tetracycline initial concentration is 400mg/L, adsorbent of the invention can reach 1035.4mg/ to the adsorbance of tetracycline
G, noticeably greater than existing report, illustrate the adsorbent of the present invention has very big potentiality in terms of the processing to tetracycline.
In the range of certain time (1~1440min), adsorbent of the invention to the adsorption rate of tetracycline very it is fast simultaneously
And adsorbance is big, when handling 15min, adsorbance has reached 262.1mg/g, with the extension of sorption reaction time, adsorbance
Increase with the time, reaction 24h when adsorbance be up to 1065.4mg/g, be significantly better than in the prior art adsorbent to Fourth Ring
The adsorbance of element.
Under additional magnetic fields, adsorbent of the invention can reach the effect separated shown in Fig. 3 from waste water in 30s
Really, separating rate is fast, and separating effect is very good.
The above described is only a preferred embodiment of the present invention, not making any formal limitation to the present invention.Though
So the present invention is disclosed as above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, in the case where not departing from the Spirit Essence and technical scheme of the present invention, all using in the methods and techniques of the disclosure above
Appearance makes many possible variations and modification to technical solution of the present invention, or is revised as the equivalent embodiment of equivalent variations.Therefore,
Every content without departing from technical solution of the present invention, the technical spirit according to the present invention is to made for any of the above embodiments any simple
Modification, equivalent substitution, equivalence changes and modification, still fall within technical solution of the present invention protection in the range of.
Claims (10)
1. a kind of magnetic magnesium hydroxide adsorbent, it is characterised in that the magnetic magnesium hydroxide adsorbent is with porous magnesium hydroxide
To be carrier loaded and filled with Fe3O4Nano-particle.
2. magnetic magnesium hydroxide adsorbent according to claim 1, it is characterised in that the magnetic magnesium hydroxide adsorbent
Specific surface area be 67.3436 ± 0.1699m2/ g, the specific surface area of the porous magnesium hydroxide is 63.0366 ± 0.3732m2/
g。
3. a kind of preparation method of magnetic magnesium hydroxide adsorbent, comprises the following steps：
(1) prepared by carrier：Under continuous stirring, NaOH solution is added dropwise to containing MgSO4Microemulsion system in, after dripping,
Continue to stir, then stand aging, products therefrom is rinsed repeatedly after being neutrality, drying to pH, obtain porous magnesium hydroxide；
(2) load：The porous magnesium hydroxide that step (1) is obtained is added in absolute ethyl alcohol, after ultrasonic disperse, adds molysite molten
Liquid, is stirred under inert gas shielding, obtains mixed liquor, and the pH value of mixed liquor is adjusted to 10~11, continues to stir, Ran Houjing
Aging is put, products therefrom is rinsed repeatedly after being neutrality, drying to pH, obtains magnetic magnesium hydroxide adsorbent.
4. the preparation method of magnetic magnesium hydroxide adsorbent according to claim 3, it is characterised in that the step (1)
In, the NaOH solution is with containing MgSO4Microemulsion system volume ratio be 1: 1, the NaOH and MgSO4Mol ratio be 2: 1,
The microemulsion system is the aqueous solution of propyl alcohol, and the volume ratio of propyl alcohol and water is 15~20: 80~85.
5. the preparation method of magnetic magnesium hydroxide adsorbent according to claim 3, it is characterised in that the step (1)
In, the speed persistently stirred is 400rpm~600rpm, and the speed of the continuation stirring is 180rpm~300rpm, described
The time for continuing to stir is 4h~6h, and the time of the standing aging is 12h~24h.
6. the preparation method of magnetic magnesium hydroxide adsorbent according to claim 3, it is characterised in that the step (1)
In, the product is alternately and repeatedly rinsed using water and ethanol, the temperature of the drying is 40 DEG C~60 DEG C.
7. the preparation method of the magnetic magnesium hydroxide adsorbent according to any one of claim 3~6, it is characterised in that
In the step (2), the porous magnesium hydroxide, absolute ethyl alcohol, the ratio of iron salt solutions are 1g~2g: 50mL~80mL:
200mL~250mL；The iron salt solutions are the mixed aqueous solution of ferrous sulfate and iron chloride, the ferrous sulfate and iron chloride
Mol ratio be 1: 2~3, the content of ferro element is 0.9mg~3.6mg in every milliliter of iron salt solutions.
8. the preparation method of the magnetic magnesium hydroxide adsorbent according to any one of claim 3~6, it is characterised in that
In the step (2), the time of the ultrasonic disperse is 5min~8min.
9. the preparation method of the magnetic magnesium hydroxide adsorbent according to any one of claim 3~6, it is characterised in that
In the step (2), when being stirred under the inert gas shielding, mixing speed is 200rpm~400rpm, mixing time
For 20min~40min；The speed for continuing to stir is 180rpm~300rpm, and the time of the continuation stirring is 1h~2h,
The time for standing aging is 12h~24h.
10. the preparation method of the magnetic magnesium hydroxide adsorbent according to any one of claim 3~6, it is characterised in that
In the step (2), the product is rinsed repeatedly using water and ethanol, the temperature of the drying is 60 DEG C~80 DEG C.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108325530A (en) * | 2018-01-30 | 2018-07-27 | 福建师范大学 | A kind of efficient type Fenton catalyst of magnesium-based and preparation method thereof |
| CN108714423A (en) * | 2018-05-08 | 2018-10-30 | 中国科学院烟台海岸带研究所 | A kind of water process composite magnetic nano catalytic material and its preparation and application |
| CN110395790A (en) * | 2019-07-30 | 2019-11-01 | 中国科学院青海盐湖研究所 | A kind of magnetism magnesium hydroxide composite material and preparation method |
| CN111450256A (en) * | 2020-04-17 | 2020-07-28 | 上海市第四人民医院 | Mesoporous magnesium hydroxide drug carrier material and preparation method and application thereof |
| CN113522226A (en) * | 2020-04-13 | 2021-10-22 | 上海大学 | Magnetic adsorbent for removing organic matters in reverse osmosis feed water and preparation method and application thereof |
| CN114160090A (en) * | 2021-11-30 | 2022-03-11 | 中国科学技术大学 | Magnetic magnesium hydroxide composite material and preparation method and application thereof |
| CN114797812A (en) * | 2022-04-19 | 2022-07-29 | 北京化大天工科技发展有限公司 | Magnetic magnesium hydroxide @ iron oxide composite nanomaterial and preparation method and application thereof |
| CN114797750A (en) * | 2022-04-22 | 2022-07-29 | 河北省科学院能源研究所 | Cross-linked starch-based composite adsorbent and preparation method and application thereof |
| CN116332343A (en) * | 2023-05-22 | 2023-06-27 | 江苏省环境工程技术有限公司 | Sulfur autotrophic denitrification sulfur-based magnetic filler and preparation method and application thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108325530A (en) * | 2018-01-30 | 2018-07-27 | 福建师范大学 | A kind of efficient type Fenton catalyst of magnesium-based and preparation method thereof |
| CN108325530B (en) * | 2018-01-30 | 2020-12-08 | 福建师范大学 | Magnesium-based efficient Fenton-like catalyst and preparation method thereof |
| CN108714423A (en) * | 2018-05-08 | 2018-10-30 | 中国科学院烟台海岸带研究所 | A kind of water process composite magnetic nano catalytic material and its preparation and application |
| CN108714423B (en) * | 2018-05-08 | 2020-10-30 | 中国科学院烟台海岸带研究所 | Composite magnetic nano catalytic material for water treatment and preparation and application thereof |
| CN110395790A (en) * | 2019-07-30 | 2019-11-01 | 中国科学院青海盐湖研究所 | A kind of magnetism magnesium hydroxide composite material and preparation method |
| CN113522226A (en) * | 2020-04-13 | 2021-10-22 | 上海大学 | Magnetic adsorbent for removing organic matters in reverse osmosis feed water and preparation method and application thereof |
| CN111450256A (en) * | 2020-04-17 | 2020-07-28 | 上海市第四人民医院 | Mesoporous magnesium hydroxide drug carrier material and preparation method and application thereof |
| CN111450256B (en) * | 2020-04-17 | 2023-10-27 | 上海市第四人民医院 | Mesoporous magnesium hydroxide drug carrier material and preparation method and application thereof |
| CN114160090A (en) * | 2021-11-30 | 2022-03-11 | 中国科学技术大学 | Magnetic magnesium hydroxide composite material and preparation method and application thereof |
| CN114797812A (en) * | 2022-04-19 | 2022-07-29 | 北京化大天工科技发展有限公司 | Magnetic magnesium hydroxide @ iron oxide composite nanomaterial and preparation method and application thereof |
| CN114797750A (en) * | 2022-04-22 | 2022-07-29 | 河北省科学院能源研究所 | Cross-linked starch-based composite adsorbent and preparation method and application thereof |
| CN114797750B (en) * | 2022-04-22 | 2023-10-13 | 河北省科学院能源研究所 | Crosslinked starch-based composite adsorbent and preparation method and application thereof |
| CN116332343A (en) * | 2023-05-22 | 2023-06-27 | 江苏省环境工程技术有限公司 | Sulfur autotrophic denitrification sulfur-based magnetic filler and preparation method and application thereof |
| CN116332343B (en) * | 2023-05-22 | 2023-08-18 | 江苏省环境工程技术有限公司 | Sulfur autotrophic denitrification sulfur-based magnetic filler and preparation method and application thereof |
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