CN105935587A - Method using attapulgite to prepare particles for removing phosphor from water - Google Patents
Method using attapulgite to prepare particles for removing phosphor from water 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
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
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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
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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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
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
- B01J20/3285—Coating or impregnation layers comprising different type of functional groups or interactions, e.g. different ligands in various parts of the sorbent, mixed mode, dual zone, bimodal, multimodal, ionic or hydrophobic, cationic or anionic, hydrophilic or hydrophobic
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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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
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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
- B01J2220/4806—Sorbents characterised by the starting material used for their preparation the starting material being of inorganic character
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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
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Abstract
The invention discloses a method using attapulgite to prepare particles for removing phosphor from water. The method comprises the following steps: grinding attapulgite into particles with a particle size of 1.05 to 1.75 mm, adding the particles into a hydrochloric acid solution to carry out acidification, and finally modifying the activated attapulgite particles by cetyl trimethyl ammonium bromide and n-octyl triethoxysilane. The provided method has the advantages that the specific surface area of attapulgite crystals is increased by the acidification treatment, thus the adsorption performance is effectively improved; by adding a cation surfactant into attapulgite, the performance of attapulgite on adsorbing organic pollutants is enhanced; the hydrophilic property of attapulgite surface is changed to hydrophobic property after organically modified attapulgite is modified by a silane coupling agent, and at the same time, the particle size of attapulgite particles is controlled to prevent attapulgite particles from floating on the water.
Description
Technical field
The invention belongs to water pollution and administer field, particularly relate to one and utilize attapulgite to prepare water body to remove
The method of phosphorus granule.
Background technology
According to the investigation to 55500 kilometers of sections, the whole nation, do not meet drink with fishery water for 47700 kms,
Accounting for 85.9%, there are 24000 kms section seriously polluted, fish and shrimp disappearance.Scientific experimentation shows, 1 gram of phosphorus enters water,
Growth cyanophyceae 100 grams in water can be made.The lake of China is nearly all in " eutrophication " state, Taihu Lake at present
The phosphorus content of water is brought up to 0.13 mg/litre of nineteen ninety-five by 0.02 mg/litre of 1981, goes up every year on average
Rise 0.008 mg/litre, exceed standard 20 times；Chaohu, phosphorus content exceeds standard 3.4 times；Dianchi Lake, Yunnan Province, due to uncontrolled
Discharge phosphorus, lake water exceedes national 5 class ground water quality standards, it is impossible to drink.
Attapulgite also known as Paligorskite or Palygorskite, be a kind of have chain layer structure containing Shuifu County's magnesium alumino metasilicate
Salt clay mineral.Its structure belongs to 2:1 type clay mineral.In each 2:1 unit structure layer, tetrahedron is brilliant
Sheet angle is pushed up direction at a certain distance and is overturned, cambium layer chain.Lead to parallel with chain is formed at tetrahedron bar interband
Road, filling zeolite water and water of crystallization in passage.
Summary of the invention
It is an object of the invention to provide a kind of method utilizing attapulgite to prepare water body dephosphorized granule, pass through
Cetyl trimethylammonium bromide and n-octytriethoxysilane are composite modified to the attapulgite of acidifying, can
With the phosphorus in active adsorption water body.
The present invention is achieved by the following technical solutions:
The present invention is a kind of method utilizing attapulgite to prepare water body dephosphorized granule, and the method concrete steps are such as
Under:
(1), by attapulgite clay being crushed to particle diameter is 1.05-1.75mm, obtains concave-convex rod particle；
(2), by the concave-convex rod particle in described step (1) adding hydrochloric acid solution acidifying, solid-to-liquid ratio is 1:1,
Mechanical agitation certain time, prepare acidifying concave-convex rod particle；
(3), by the acidifying concave-convex rod particle in described step (2) wash to without Chloride residue, will wash
After concave-convex rod particle vacuum filtration dry after obtain be dried concave-convex rod particle；
(4), the dry concave-convex rod particle obtained in described step (3) is joined the cation form configured
In the activating agent of face, solid-to-liquid ratio is 1:10, and mechanical agitation certain time final vacuum sucking filtration drying obtain organic changing
Property concave-convex rod particle；
(5), the organically-modified concave-convex rod particle obtained in described step (4) is joined n-octyl three ethoxy
In base silane solution, flask is positioned in electric jacket and is heated to isothermal reaction 4h after solution boiling, stop adding
Hot final vacuum sucking filtration drying obtain composite modified concave-convex rod particle.
Further, described step (2) adds the concentrated hydrochloric acid that concentration is 37% in distilled water and be configured to 5mol/L
Hydrochloric acid solution, in described step (2), mixing time is 4-6h, and agitator speed is 200-220r/min.
Further, it is acidified concave-convex rod particle described in step (3) and is washed with deionized 3-5 time, described
Step uses 1mol/LAgNO in (3)3Solution detection residual chlorine ion, oven temperature in described step (3)
Being 105 DEG C, drying time is 2-4h..
Further, described step (4) adds cetyl trimethylammonium bromide in distilled water to be configured to
The cationic surfactant of 0.25-1mol/L, described cationic surfactant 1mol/L NaoH regulates
PH to 8.5, described agitator speed is 250-280r/min, and in described step (4), oven temperature is 105 DEG C,
Drying time is 2-4h.
Further, described step (5) adds n-octytriethoxysilane in butanol solution to be configured to
Silane coupler solution, pours in flask, wherein, in described n-octytriethoxysilane and step (4)
The mass ratio of the organically-modified concave-convex rod particle obtained is 1.5:10, and in described step (5), oven temperature is
105 DEG C, drying time is 4h.
The method have the advantages that
Water body dephosphorized granule prepared by the inventive method, makes attapulgite crystal specific surface increase by acidification
Add, be effectively increased absorbability；By adding cationic surfactant in attapulgite, enhance recessed
The convex rod absorbability to organic pollution, meanwhile, cetyl trimethylammonium bromide is as cationic surface
Activating agent has stronger absorbability to phosphorus；Silane coupler can produce a large amount of silicone hydroxyl when hydrolysis, this
A little silicone hydroxyl can produce condensation, or the silicone hydroxyl of silane coupler self with attapulgite surface silanol group
Condensation, is covered in attapulgite surface, its configuration of surface modified and character, forms new network structure, right
The surface nature of the attapulgite after organically-modified concave-convex rod particle employing silane coupler is composite modified is by parent
Aqueous becomes hydrophobicity, simultaneously to concave-convex rod particle size controlling, prevents concave-convex rod particle from floating on water body table
Face.
Detailed description of the invention
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described enforcement
Example is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention,
All other embodiments that those of ordinary skill in the art are obtained under not making creative work premise,
Broadly fall into the scope of protection of the invention.
Embodiment 1
(1), by attapulgite being crushed to particle diameter is 1.05mm, obtains concave-convex rod particle；
(2), distilled water adds the concentrated hydrochloric acid that concentration is 37% and be configured to the hydrochloric acid solution of 5mol/L, by step
Suddenly the concave-convex rod particle in (1) adds hydrochloric acid solution acidifying, and solid-to-liquid ratio is 1:1, mechanical agitation 6h, stirring
Device rotating speed is that 200r/min prepares acidifying concave-convex rod particle；
(3), the acidifying concave-convex rod particle in step (2) is washed with deionized 5 times, uses 1mol/L
AgNO3Solution detection Cl ion residues, is positioned over 105 DEG C after the concave-convex rod particle vacuum filtration after washing
Baking oven is dried 2h obtain being dried concave-convex rod particle；
(4), distilled water adds cetyl trimethylammonium bromide and is configured to the cationic surface work of 1mol/L
Property agent, with 1mol/L NaoH regulate pH to 8.5, under 50 DEG C of water bath condition, by what step (3) obtained
The dry concave-convex rod particle of high-temperature process joins in the cationic surfactant configured, and solid-to-liquid ratio is
1:10, mechanical agitation 20min, agitator speed is 250r/min, obtains organically-modified attapulgite solution；
Organic changing is obtained by being positioned in 105 DEG C of baking ovens drying 4h after organically-modified attapulgite solution for vacuum sucking filtration
Property concave-convex rod particle；
(5), butanol solution adds n-octytriethoxysilane (LM-N308) and be configured to silane coupled
Agent solution, pours in flask, wherein, and the organically-modified attapulgite obtained in LM-N308 and step (4)
The mass ratio of grain is 1.5:10；
The organically-modified concave-convex rod particle obtained in step (4) is joined in silane coupler solution, will burn
Bottle is positioned in electric jacket and is heated to isothermal reaction 4h after solution boiling, stops heating；
Drying will be positioned in 105 DEG C of baking ovens after coupling agent modified concave-convex rod particle solution for vacuum sucking filtration
4h obtains composite modified concave-convex rod particle；
(6), the phosphorus content measured in water body, the composite modified concave-convex rod particle that step (5) obtains is added
Entering to containing in phosphorus water, solid-to-liquid ratio is 1:10, and attapulgite adsorbent temperature is 60 DEG C, and adsorption time is 120min,
Measuring phosphoric residue in water body, clearance computing formula is:
Embodiment 2
(1), by attapulgite being crushed to particle diameter is 1.75mm, obtains concave-convex rod particle；
(2), distilled water adds the concentrated hydrochloric acid that concentration is 37% and be configured to the hydrochloric acid solution of 5mol/L, by step
Suddenly the concave-convex rod particle in (1) adds hydrochloric acid solution acidifying, and solid-to-liquid ratio is 1:1, mechanical agitation 4h, stirring
Device rotating speed is that 220r/min prepares acidifying concave-convex rod particle；
(3), the acidifying concave-convex rod particle in step (2) is washed with deionized 3 times, uses 1mol/L
AgNO3Solution detection Cl ion residues, is positioned over 105 DEG C after the concave-convex rod particle vacuum filtration after washing
Baking oven is dried 4h obtain being dried concave-convex rod particle；
(4), distilled water adds cetyl trimethylammonium bromide and be configured to the cation form of 0.25mol/L
Face activating agent, regulates pH to 8.5 with 1mol/L NaoH, under 50 DEG C of water bath condition, will obtain in step (3)
To the dry concave-convex rod particle of high-temperature process join in the cationic surfactant configured, solid-to-liquid ratio
For 1:10, mechanical agitation 20min, agitator speed is 280r/min, obtains organically-modified attapulgite solution；
Organic changing is obtained by being positioned in 105 DEG C of baking ovens drying 2h after organically-modified attapulgite solution for vacuum sucking filtration
Property concave-convex rod particle；
(5), butanol solution adds n-octytriethoxysilane (LM-N308) and be configured to silane coupled
Agent solution, pours in flask, wherein, and the organically-modified attapulgite obtained in LM-N308 and step (4)
The mass ratio of grain is 1.5:10；
The organically-modified concave-convex rod particle obtained in step (4) is joined in silane coupler solution, will burn
Bottle is positioned in electric jacket and is heated to isothermal reaction 4h after solution boiling, stops heating；
Drying will be positioned in 105 DEG C of baking ovens after coupling agent modified concave-convex rod particle solution for vacuum sucking filtration
4h obtains composite modified concave-convex rod particle；
(6), the phosphorus content measured in water body, composite modified concave-convex rod particle step (5) obtained adds
To containing in phosphorus water, solid-to-liquid ratio is 1:10, and attapulgite adsorbent temperature is 60 DEG C, and adsorption time is 120min,
Measuring phosphoric residue in water body, clearance computing formula is:
Embodiment 3
(1), by attapulgite being crushed to particle diameter is 1.5mm, obtains concave-convex rod particle；
(2), distilled water adds the concentrated hydrochloric acid that concentration is 37% and be configured to the hydrochloric acid solution of 5mol/L, by step
Suddenly the concave-convex rod particle in (1) adds hydrochloric acid solution acidifying, and solid-to-liquid ratio is 1:1, mechanical agitation 5h, stirring
Device rotating speed is that 210r/min prepares acidifying concave-convex rod particle；
(3), the acidifying concave-convex rod particle in step (2) is washed with deionized 4 times, uses 1mol/L
AgNO3Solution detection Cl ion residues, is positioned over 105 DEG C after the concave-convex rod particle vacuum filtration after washing
Baking oven is dried 3h obtain being dried concave-convex rod particle；
(4), distilled water adds cetyl trimethylammonium bromide and be configured to the cationic surface of 0.6mol/L
Activating agent, regulates pH to 8.5 with 1mol/L NaoH, under 50 DEG C of water bath condition, will obtain in step (3)
The dry concave-convex rod particle of high-temperature process join in the cationic surfactant configured, solid-to-liquid ratio is
1:10, mechanical agitation 20min, agitator speed is 265r/min, obtains organically-modified attapulgite solution；
Organic changing is obtained by being positioned in 105 DEG C of baking ovens drying 3h after organically-modified attapulgite solution for vacuum sucking filtration
Property concave-convex rod particle；
(5), butanol solution adds n-octytriethoxysilane (LM-N308) and be configured to silane coupled
Agent solution, pours in flask, wherein, and the organically-modified attapulgite obtained in LM-N308 and step (4)
The mass ratio of grain is 1.5:10；
The organically-modified concave-convex rod particle obtained in step (4) is joined in silane coupler solution, will burn
Bottle is positioned in electric jacket and is heated to isothermal reaction 4h after solution boiling, stops heating；
Drying will be positioned in 105 DEG C of baking ovens after coupling agent modified concave-convex rod particle solution for vacuum sucking filtration
4h obtains composite modified concave-convex rod particle；
(6), the phosphorus content measured in water body, composite modified concave-convex rod particle step (5) obtained adds
To containing in phosphorus water, solid-to-liquid ratio is 1:10, and attapulgite adsorbent temperature is 40 DEG C, and adsorption time is 120min,
Measuring phosphoric residue in water body, clearance computing formula is:
Water body dephosphorized granule prepared by the inventive method, makes attapulgite crystal specific surface increase by acidification
Add, be effectively increased absorbability；By adding cationic surfactant in attapulgite, enhance recessed
The convex rod absorbability to organic pollution, meanwhile, cetyl trimethylammonium bromide is as cationic surface
Activating agent has stronger absorbability to phosphorus；Silane coupler can produce a large amount of silicone hydroxyl when hydrolysis, this
A little silicone hydroxyl can produce condensation, or the silicone hydroxyl of silane coupler self with attapulgite surface silanol group
Condensation, is covered in attapulgite surface, its configuration of surface modified and character, forms new network structure, right
The surface nature of the attapulgite after organically-modified concave-convex rod particle employing silane coupler is composite modified is by parent
Aqueous becomes hydrophobicity, simultaneously to concave-convex rod particle size controlling, prevents concave-convex rod particle from floating on water body table
Face.
Above content is only citing made for the present invention and explanation, affiliated those skilled in the art
Described specific embodiment is made various amendment or supplements or use similar mode to substitute, as long as
Without departing from inventing or surmounting scope defined in the claims, protection scope of the present invention all should be belonged to.
Claims (5)
1. one kind utilizes the method that attapulgite prepares water body dephosphorized granule, it is characterised in that include following concrete
Step:
(1), by attapulgite clay being crushed to particle diameter is 1.05-1.75mm, obtains concave-convex rod particle；
(2), by the concave-convex rod particle in described step (1) adding hydrochloric acid solution acidifying, solid-to-liquid ratio is 1:1,
Mechanical agitation certain time, prepare acidifying concave-convex rod particle；
(3), by the acidifying concave-convex rod particle in described step (2) wash to without Chloride residue, will wash
After concave-convex rod particle vacuum filtration dry after obtain be dried concave-convex rod particle；
(4), the dry concave-convex rod particle obtained in described step (3) is joined cetyl trimethyl bromine
Changing in ammonium, solid-to-liquid ratio is 1:10, and mechanical agitation certain time final vacuum sucking filtration drying obtain organically-modified recessed
Convex rod granule；
(5), the organically-modified concave-convex rod particle obtained in described step (4) is joined n-octyl three ethoxy
In base silane solution, flask is positioned in electric jacket and is heated to isothermal reaction 4h after solution boiling, stop adding
Hot final vacuum sucking filtration drying obtain composite modified concave-convex rod particle.
A kind of method utilizing attapulgite to prepare water body dephosphorized granule the most according to claim 1, its
It is characterised by, described step (2) adds in distilled water the concentrated hydrochloric acid that concentration is 37% and is configured to 5mol/L
Hydrochloric acid solution, in described step (2), mixing time is 4-6h, and agitator speed is 200-220r/min.
A kind of method utilizing attapulgite to prepare water body dephosphorized granule the most according to claim 1, its
It is characterised by, is acidified concave-convex rod particle described in step (3) and is washed with deionized 3-5 time, described step
(3) 1mol/L AgNO is used in3Solution detection residual chlorine ion, in described step (3), oven temperature is
105 DEG C, drying time is 2-4h..
A kind of method utilizing attapulgite to prepare water body dephosphorized granule the most according to claim 1, its
It is characterised by, described step (4) adds in distilled water cetyl trimethylammonium bromide and is configured to
The cationic surfactant of 0.25-1mol/L, described cationic surfactant 1mol/L NaoH regulates
PH to 8.5, described agitator speed is 250-280r/min, and in described step (4), oven temperature is 105 DEG C,
Drying time is 2-4h.
A kind of method utilizing attapulgite to prepare water body dephosphorized granule the most according to claim 1, its
It is characterised by, described step (5) adds in butanol solution n-octytriethoxysilane and is configured to silane
Coupling agent solution, pours in flask, and wherein, described n-octytriethoxysilane obtains in step (4)
The mass ratio of organically-modified concave-convex rod particle be 1.5:10, in described step (5), oven temperature is 105 DEG C,
Drying time is 4h.
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| CN107722362A (en) * | 2017-10-20 | 2018-02-23 | 常州大学盱眙凹土研发中心 | A kind of preparation method of the ultraviolet shielded material of concave convex rod ground mass all band |
| CN111729639A (en) * | 2019-10-25 | 2020-10-02 | 广和环保科技(深圳)有限公司 | Coating circulating water treatment agent and preparation method thereof |
| CN112121758A (en) * | 2020-09-14 | 2020-12-25 | 江苏开放大学（江苏城市职业学院） | Layered double hydroxide composite attapulgite clay and preparation method thereof |
| CN112934171A (en) * | 2021-02-02 | 2021-06-11 | 南京公诚节能新材料研究院有限公司 | Attapulgite clay surface modification method |
| CN113856626A (en) * | 2021-10-11 | 2021-12-31 | 盱眙凹土能源环保材料研发中心 | Method for hydrothermal preparation of attapulgite-activated carbon composite material by attapulgite decoloration waste soil |
| CN114849677A (en) * | 2022-06-10 | 2022-08-05 | 重庆大学 | Phosphate radical adsorption material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107722362A (en) * | 2017-10-20 | 2018-02-23 | 常州大学盱眙凹土研发中心 | A kind of preparation method of the ultraviolet shielded material of concave convex rod ground mass all band |
| CN107722362B (en) * | 2017-10-20 | 2019-02-26 | 常州大学盱眙凹土研发中心 | A kind of preparation method of the ultraviolet shielded material of concave convex rod ground mass all band |
| CN111729639A (en) * | 2019-10-25 | 2020-10-02 | 广和环保科技(深圳)有限公司 | Coating circulating water treatment agent and preparation method thereof |
| CN111729639B (en) * | 2019-10-25 | 2022-07-15 | 广和环保科技(深圳)有限公司 | Coating circulating water treatment agent and preparation method thereof |
| CN112121758A (en) * | 2020-09-14 | 2020-12-25 | 江苏开放大学（江苏城市职业学院） | Layered double hydroxide composite attapulgite clay and preparation method thereof |
| CN112934171A (en) * | 2021-02-02 | 2021-06-11 | 南京公诚节能新材料研究院有限公司 | Attapulgite clay surface modification method |
| CN113856626A (en) * | 2021-10-11 | 2021-12-31 | 盱眙凹土能源环保材料研发中心 | Method for hydrothermal preparation of attapulgite-activated carbon composite material by attapulgite decoloration waste soil |
| CN114849677A (en) * | 2022-06-10 | 2022-08-05 | 重庆大学 | Phosphate radical adsorption material and preparation method thereof |
| CN114849677B (en) * | 2022-06-10 | 2024-01-26 | 重庆大学 | Phosphate adsorption material and preparation method thereof |
| CN115888634A (en) * | 2022-12-31 | 2023-04-04 | 常州纳欧新材料科技有限公司 | High-strength water-resistant adsorbent and preparation method thereof |
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