CN116474711A - Efficient dephosphorization adsorbent and preparation method thereof - Google Patents
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- 239000003463 adsorbent Substances 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000001179 sorption measurement Methods 0.000 claims abstract description 34
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 28
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000011574 phosphorus Substances 0.000 claims abstract description 25
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 25
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims abstract description 22
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 22
- 239000011148 porous material Substances 0.000 claims abstract description 17
- 238000005470 impregnation Methods 0.000 claims abstract description 8
- 229910001593 boehmite Inorganic materials 0.000 claims abstract description 7
- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 7
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims abstract description 7
- 229960004887 ferric hydroxide Drugs 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 238000011065 in-situ storage Methods 0.000 claims abstract description 3
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 4
- 229910019142 PO4 Inorganic materials 0.000 abstract description 3
- 239000010452 phosphate Substances 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 20
- 238000010790 dilution Methods 0.000 description 5
- 239000012895 dilution Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000012851 eutrophication Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 238000002835 absorbance Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009388 chemical precipitation Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000002686 phosphate fertilizer Substances 0.000 description 2
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
-
- 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
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- 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
- B01J20/28061—Surface area, e.g. B.E.T specific surface area being in the range 100-500 m2/g
-
- 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
- B01J20/28069—Pore volume, e.g. total pore volume, mesopore volume, micropore volume
- B01J20/28071—Pore volume, e.g. total pore volume, mesopore volume, micropore volume being less than 0.5 ml/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
- C02F2101/105—Phosphorus compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a high-efficiency dephosphorization adsorbent and a preparation method thereof. Roasting boehmite at 500-700 ℃ for 1-10 hours to obtain an active alumina carrier, and then dripping ferric chloride solution for impregnation to uniformly disperse ferric chloride in pore channels of the active alumina; finally, heating and hydrolyzing to convert ferric chloride in the limited domain in the alumina pore canal into amorphous ferric hydroxide in situ, thus obtaining the efficient dephosphorization adsorbent. The preparation method of the dephosphorization adsorbent is simple, the raw materials are cheap and easy to obtain, and the dephosphorization adsorbent is environment-friendly and easy to industrialize. The dephosphorization adsorbent prepared by the invention can remove phosphate in water, and has high adsorption speed and adsorption capacity. 100mL of water body with the phosphorus concentration of 100mg/L is adsorbed by using 0.10g of adsorbent, the adsorption equilibrium is reached only by 60min, and the equilibrium adsorption capacity is as high as 82.5mg/g.
Description
Technical Field
The invention belongs to the technical field of water dephosphorization, and particularly relates to a high-efficiency dephosphorization adsorbent and a preparation method thereof.
Background
Phosphorus is an important component of the food chain and agricultural economy, mainly arising from phosphorus-containing waste emissions from agriculture, industry and everyday life. Approximately 50% of the phosphate fertilizer applied in the agricultural production process can be lost into rivers and lakes to cause water eutrophication, so that the phosphate fertilizer is harmful to human health and ecological environment. Solving the eutrophication of water bodies in rivers and lakes is always a great challenge in the field of environmental protection.
Numerous studies are currently being conducted to remove phosphate ions from water bodies, such as ion exchange, crystallization, chemical precipitation, biological treatment, and adsorption. The ion exchange method and the chemical precipitation method have high cost and serious secondary pollution; the crystallization method and the biological treatment method are difficult to operate, require time and cost for maintenance, and are limited in practical application; in contrast, the adsorption method is simple to operate, low in cost and environment-friendly, and is the most promising method for solving eutrophication of rivers and lakes.
Various adsorbents have been used to remove and recover phosphate from wastewater. How to further reduce the production cost of the adsorbent and improve the adsorption capacity of the adsorbent, and the preparation of the efficient dephosphorization adsorbent is the key of the current sewage dephosphorization technology. Among the many common adsorbents, iron (hydro) oxide and aluminum (hydro) oxide nanoparticles show great potential due to their characteristics of low cost, easy availability, strong adsorption capacity for phosphorus, environmental friendliness, etc.
Activated alumina has a larger specific surface area, excellent pore structure and better stability, and the larger specific surface area can provide more active sites to load more other metals or metal oxides. The multi-element metal adsorbent generally shows physical and chemical properties which are obviously different from those of the single metal adsorbent, can combine the advantages of the single component, and has more excellent adsorption capacity.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention aims to provide a simpler, more convenient and more efficient preparation method of the dephosphorization adsorbent and specific application of the dephosphorization adsorbent in adsorption.
The preparation method of the efficient dephosphorization adsorbent comprises the following steps: roasting boehmite at 500-700 ℃ for 1-10 hours to obtain an active alumina carrier, and then dripping ferric chloride solution for impregnation to uniformly disperse ferric chloride in pore channels of the active alumina; finally, heating and hydrolyzing to convert ferric chloride in the limited domain in the alumina pore canal into amorphous ferric hydroxide in situ, thus obtaining the efficient dephosphorization adsorbent.
The boehmite is prepared from sodium metaaluminate and aluminum sulfate.
The concentration of the ferric chloride solution is 2.75-11.00mol/L.
The molar ratio of the iron in the ferric chloride solution to the aluminum in the active aluminum oxide carrier is 0.1-0.6.
The hydrolysis temperature is 80-110 ℃ and the time is 4-8h.
The specific surface area of the active alumina carrier is 400-600m 2 Per gram, pore volume of 3.0-4.0cm 3 /g。
The specific surface area of the high-efficiency dephosphorization adsorbent is 150-380m 2 Per gram, pore volume of 0.18-1.90cm 3 /g。
The application method of the efficient dephosphorization adsorbent comprises the following steps: and adding the efficient dephosphorization adsorbent into the phosphorus-containing waste liquid to perform adsorption dephosphorization. The adsorption capacity of the efficient dephosphorization adsorbent is 58.0-82.5mg/g.
The invention has the following beneficial effects:
1. the dephosphorization adsorbent prepared by the method has the advantages of low raw material cost and simple preparation method, and the prepared adsorbent has a larger specific surface area and rich pore structures. As the impregnation amount of the ferric chloride solution increases, the removal amount of phosphorus by the adsorbent gradually increases, and the active alumina and the iron oxide act synergistically to show excellent adsorption effect.
2. The adsorbent prepared by the invention can remove high-concentration phosphate in water, has high adsorption speed and high adsorption capacity, exceeds the adsorption capacity of all ferric oxide and aluminum oxide materials reported in domestic and foreign documents, and overcomes the disadvantages of a single adsorbent. For 100mL of wastewater with the phosphorus concentration of 100mg/L, the concentration of the phosphorus solution is measured by an ammonium molybdate spectrophotometry after the wastewater is adsorbed for 60min by using 0.10g of adsorbent, the adsorption capacity is up to 82.47mg/g, and the removal efficiency is up to 82.5%.
Drawings
FIG. 1 is an SEM image of a high-efficiency dephosphorizing adsorbent prepared in example 1.
FIG. 2 is an XRD pattern of the high efficiency dephosphorizing adsorbent prepared in example 1.
FIG. 3 is a graph of concentration versus absorbance standard for different concentrations of phosphorus standard solutions used in the present invention.
Detailed Description
The present invention is described in detail below to enable those skilled in the art to practice the invention by reference to the specification.
In the following examples and comparative examples:
XRD parameters were measured by Bruce, germany, D8 advanced polycrystal diffractometer; the high resolution transmission electron microscope image was obtained by JEOL, high resolution transmission electron microscope (JEM 2100) test from JEOL, japan electronics Co. The absorbance was measured by a Japanese Shimadzu corporation UV-260, ultraviolet-visible spectrophotometer (UV).
Preparing sodium metaaluminate and aluminum sulfate solution, and preparing boehmite by adopting the method of patent CN 104692429B.
Example 1
And (3) roasting the boehmite at 600 ℃ for 2 hours to obtain the active alumina carrier. The specific surface area of the prepared activated alumina is 493.7m 2 Per gram, pore volume of 3.6cm 3 And/g. Preparing 2mL of ferric chloride solution with the concentration of 11.00mol/L, and dripping 2g of activated alumina for impregnation to uniformly disperse ferric chloride in pore channels of the activated alumina; finally hydrolyzing for 5 hours at 100 ℃ to obtain the dephosphorization adsorbent.
0.1g of the prepared dephosphorization adsorbent is weighed and added into 100mL of to-be-detected liquid with the phosphorus concentration of 100mg/L, the mixture is stirred at room temperature for 60min to reach adsorption equilibrium, and then filtration, dilution, color development and test are carried out, and the concentration of the phosphorus solution after adsorption is calculated according to a standard curve. The concentration of the phosphorus solution after adsorption was 17.53mg/L, the adsorption capacity was 82.5mg/g, and the removal efficiency was 82.47%.
Example 2
The activated alumina prepared in example 1 was used as a carrier for the composite adsorbent. Preparing 1.8mL of ferric chloride solution with the concentration of 8.25mol/L, and dripping 2g of activated alumina for impregnation to uniformly disperse ferric chloride in pore channels of the activated alumina; finally hydrolyzing for 5 hours at 100 ℃ to obtain the dephosphorization adsorbent.
0.1g of the prepared dephosphorization adsorbent is weighed and added into 100mL of to-be-detected liquid with the phosphorus concentration of 100mg/L, the mixture is stirred for 60min at room temperature, and then the filtration, dilution, color development and test are carried out, and the concentration of the phosphorus solution after adsorption is calculated according to a standard curve. The concentration of the phosphorus solution after adsorption was 18.45mg/L, the adsorption capacity was 81.6mg/g, and the removal efficiency was 81.6%.
Example 3
The activated alumina prepared in example 1 was used as a carrier for the composite adsorbent. Preparing 1.6mL of ferric chloride solution with the concentration of 5.50mol/L, and dripping 2g of activated alumina for impregnation to uniformly disperse ferric chloride in pore channels of the activated alumina; finally hydrolyzing for 5 hours at 100 ℃ to obtain the dephosphorization adsorbent.
0.1g of the prepared dephosphorization adsorbent is weighed and added into 100mL of to-be-detected liquid with the phosphorus concentration of 100mg/L, the mixture is stirred for 120min at room temperature, and then the filtration, dilution, color development and test are carried out, and the concentration of the phosphorus solution after adsorption is calculated according to a standard curve. The concentration of the phosphorus solution after adsorption was 29.9mg/L, the adsorption capacity was 70.1mg/g, and the removal efficiency was 70.11%.
Example 4
The activated alumina prepared in example 1 was used as a carrier for the composite adsorbent. Preparing 1.4mL of ferric chloride solution with the concentration of 2.75mol/L, and dripping 2g of activated alumina for impregnation to uniformly disperse ferric chloride in pore channels of the activated alumina; finally hydrolyzing for 5 hours at 100 ℃ to obtain the dephosphorization adsorbent.
0.1g of the prepared dephosphorization adsorbent is weighed and added into 100mL of to-be-detected liquid with the phosphorus concentration of 100mg/L, the mixture is stirred for 120min at room temperature, and then the filtration, dilution, color development and test are carried out, and the concentration of the phosphorus solution after adsorption is calculated according to a standard curve. The concentration of the phosphorus solution after adsorption was 41.0mg/L, the adsorption capacity was 59.0mg/g, and the removal efficiency was 59.0%.
Comparative example 1
The activated alumina prepared in example 1 was used as a single component adsorbent.
0.1g of the prepared dephosphorization adsorbent is weighed and added into 100mL of to-be-detected liquid with the phosphorus concentration of 100mg/L, the mixture is stirred for 300min at room temperature, and then the filtration, dilution, color development and test are carried out, and the concentration of the phosphorus solution after adsorption is calculated according to a standard curve. The concentration of the phosphorus solution after adsorption was 42.25mg/L, the adsorption capacity was 57.8mg/g, and the removal efficiency was 57.8%.
Claims (9)
1. The preparation method of the efficient dephosphorization adsorbent is characterized by comprising the following specific operations: roasting boehmite at 500-700 ℃ for 1-10 hours to obtain an active alumina carrier, and then dripping ferric chloride solution for impregnation to uniformly disperse ferric chloride in pore channels of the active alumina; finally, heating and hydrolyzing to convert ferric chloride in the limited domain in the alumina pore canal into amorphous ferric hydroxide in situ, thus obtaining the efficient dephosphorization adsorbent.
2. The method for preparing a high-efficiency dephosphorizing adsorbent according to claim 1, wherein the boehmite is prepared from sodium metaaluminate and aluminum sulfate.
3. The method for preparing a high-efficiency dephosphorizing adsorbent according to claim 1, wherein the concentration of the ferric chloride solution is 2.75-11.00mol/L.
4. The method for preparing a high efficiency dephosphorizing adsorbent according to claim 1, wherein the molar ratio of iron in the ferric chloride solution to aluminum in the activated alumina carrier is 0.1-0.6.
5. The method for preparing the efficient dephosphorizing adsorbent according to claim 1, wherein the hydrolysis temperature is 80-110 ℃ and the time is 4-8h.
6. The high efficiency of claim 1The preparation method of the dephosphorization adsorbent is characterized in that the specific surface area of the active alumina carrier is 400-600m 2 Per gram, pore volume of 3.0-4.0cm 3 /g。
7. The method for preparing the efficient dephosphorization adsorbent according to claim 1, wherein the specific surface area of the efficient dephosphorization adsorbent is 150-380m 2 Per gram, pore volume of 0.18-1.90cm 3 /g。
8. The method for using the efficient dephosphorization adsorbent prepared by the method according to any one of claims 1 to 7 is characterized in that the efficient dephosphorization adsorbent is added into the phosphorus-containing waste liquid to adsorb and dephosphorize.
9. The method of use of claim 8, wherein the high efficiency dephosphorization adsorbent has an adsorption capacity of 58.0-82.5mg/g.
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