CN111905694A - Preparation of copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material and application of composite material in removing ammonia nitrogen in water - Google Patents

Preparation of copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material and application of composite material in removing ammonia nitrogen in water Download PDF

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CN111905694A
CN111905694A CN202010717421.1A CN202010717421A CN111905694A CN 111905694 A CN111905694 A CN 111905694A CN 202010717421 A CN202010717421 A CN 202010717421A CN 111905694 A CN111905694 A CN 111905694A
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copper
durian shell
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aluminum
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袁俊杰
王纪章
朱瑶
邱凤仙
吴杰义
张涛
李萍萍
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Jiangsu University
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    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
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    • 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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    • 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
    • B01J20/0233—Compounds of Cu, Ag, Au
    • B01J20/0237—Compounds of Cu
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—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
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    • B01J20/28023—Fibres or filaments
    • 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
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    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F2101/30—Organic compounds
    • C02F2101/38—Organic compounds containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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    • C02F2209/14—NH3-N

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Abstract

The invention belongs to the technical field of composite materials, relates to modified biomass carbon fibers, and particularly relates to a preparation method of a copper-aluminum bimetal oxide modified durian shell carbon fiber composite material, which comprises the following steps: soaking durian shells in alkali liquor to remove impurities, and adding sodium hypochlorite solution acidified by acetic acid to bleach for 1-6 h; preparing 0.1-1 mol/L aluminum nitrate solution, soaking white fibers for 2-10 h, filtering, drying to obtain a sample, and carrying out nitrogen treatment on the sampleCalcining for 1-4 h at 250-800 ℃ to obtain aluminum oxide coated durian shell fibers; copper nitrate and Al2O3dissolving/DBF and hexamethylenetetramine in deionized water, fully stirring, transferring to a stainless steel reaction kettle, reacting for 6-12 h at 60-150 ℃, filtering, washing, drying and calcining to obtain the catalyst. The method utilizes common waste durian shell biomass resources to prepare the composite material through hydrothermal and calcining methods, realizes effective removal of ammonia nitrogen in water at normal temperature, can be recycled, and has the advantages of energy conservation, environmental protection, convenient recovery and the like.

Description

Preparation of copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material and application of composite material in removing ammonia nitrogen in water
Technical Field
The invention belongs to the technical field of composite materials, relates to modified biomass carbon fibers, and particularly relates to preparation of a copper-aluminum bimetal oxide modified durian shell carbon fiber composite material and application of the copper-aluminum bimetal oxide modified durian shell carbon fiber composite material in removing ammonia nitrogen in water.
Background
Water resources have become a worldwide concern. Human beings live on the earth, and available water resources are becoming scarce due to the increase of population and the development of industrialization. In many countries and regions, industrial and domestic wastewater with high ammonia nitrogen content is not treated completely and improperly, resulting in serious pollution and eutrophication of oceans, lakes and reservoirs. More seriously, the ammonia nitrogen wastewater can promote the generation of other toxic substances when being directly discharged into a water body. For many years, part of physical, chemical and biological techniques have been used for ammonia nitrogen treatment, including biological treatment, ion exchange, adsorption and oxidation techniques, and the adsorption method, which is considered to be the most economically and technically advantageous, has been widely studied. However, how to promote the adsorption efficiency of the adsorbent and avoid the low adsorption performance caused by the agglomeration of the adsorbent becomes a problem to be solved urgently.
In recent years, biological waste has been widely used to prepare low-cost adsorbents. The biological waste is an organic substance rich in carbon elements, has the advantages of wide source, low cost, biodegradability and the like, and particularly shows the potential of being used as a high-efficiency adsorbent and an adsorbent carrier. The biomass charcoal is a substance which is formed by thermally cracking or incompletely burning biomass, has a large specific surface area, a developed pore structure and abundant surface functional groups, and has strong adsorbability and stability. In order to minimize the overall cost and improve the adsorption performance, researchers are gradually turning to biomass waste that is common in everyday life.
Durian, football-sized, firm in peel, dense, triangular in thorn, one of the famous tropical fruits, native to malaysia. Some countries in southeast Asia grow more, with Thailand being the most. In recent years, China Guangdong and Hainan are also planted. Durian is most famous in Thailand and is known as the king of fruit. Its odor is strong, lovers praise it and dislikes it complains it smelly, lay the waste durian shell at will, and the environmental pollution is serious. Therefore, the abandoned durian shell is used as a bimetallic oxide dispersion carrier to prepare the bimetallic oxide/durian shell fiber (Cu-Al/DBF) composite adsorbing material, so that the environment can be cleaned, ammonia nitrogen in water can be adsorbed, and the agglomeration of a bimetallic oxide adsorbent can be reduced. The material is used as an ammonia nitrogen degradation adsorbent, and the ammonia nitrogen removal performance of the material under different initial pH values, reaction temperatures and other conditions is explored.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to disclose a preparation method of a copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material.
Technical scheme
A preparation method of a copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material comprises the following steps:
a) soaking the crushed durian shells in a sodium hydroxide solution at the temperature of 20-100 ℃ for 2-6 h, preferably 1M, soaking at the temperature of 80 ℃ for 4h, removing impurities, washing the obtained yellow filamentous biomass fibers with deionized water, adding an acetic acid acidified sodium hypochlorite solution, bleaching for 1-6 h, preferably 3h, washing, and drying to obtain white fibers (DBF);
b) preparing 0.1-1 mol/L aluminum nitrate solution, soaking the obtained white fiber for 2-10 h, filtering, preferably soaking 0.5mol/L for 5h, drying to obtain a sample, calcining at 250-800 ℃ for 1-4 h, preferably calcining at 500 ℃ for 2h under the condition of nitrogen, and obtaining the aluminum oxide coated durian shell fiber(Al2O3/DBF)；
c) Copper nitrate and Al are added to the mixture in a solid-to-liquid ratio of 0.2 to 1.2g, 0.1 to 0.5g, 0.25 to 1.5g, 50 to 200mL, preferably 0.6g, 0.3g, 0.5g, 75mL2O3dissolving/DBF and hexamethylenetetramine in deionized water, fully stirring, transferring to a stainless steel reaction kettle, reacting for 6-12 h at 60-150 ℃, preferably reacting for 10h at 90 ℃, filtering, washing and drying, calcining the material at 250-750 ℃ for 2-8 h, preferably calcining for 4h at 500 ℃ to obtain the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material (Cu-Al/DBF).
In the preferred embodiment of the invention, the concentration of the sodium hydroxide solution is 0.1-2M, and the sodium hypochlorite solution acidified by acetic acid is prepared by dissolving sodium hypochlorite in water according to a mass fraction of 5% and then adjusting the pH value to 4 by using acetic acid.
The copper-aluminum bimetallic oxide/durian shell biomass carbon fiber composite material (Cu-Al/DBF) prepared by the method has an obvious porous hierarchical structure in appearance, and the action area of the bimetallic oxide on ammonia nitrogen adsorption in water is greatly increased. Meanwhile, the nano short fiber clusters not only form micro-nano-scale pore canals, but also form a macroporous structure among the nano short fiber clusters, so that mass transfer of ammonia nitrogen to Cu-Al/DBF substances is facilitated, the adsorption performance of Cu-Al/DBF is improved, and the nano short fiber clusters can be used for removing ammonia nitrogen pollutants in a water body.
The invention also aims to apply the prepared Cu-Al/DBF to the removal of ammonia nitrogen pollutants in water.
A method for removing ammonia nitrogen pollutants in a water body by laboratory simulation comprises the following steps:
adding 10-80 mg of Cu-Al/DBF into every 10mL of 100mg/L ammonium chloride solution, adjusting the pH value of the solution to 3-13, adsorbing for 2h at the temperature of 25-55 ℃ (the temperature gradient is 15 ℃), measuring the concentration of ammonia nitrogen by an ultraviolet spectrophotometry, and calculating the removal efficiency of the ammonia nitrogen.
The invention has the characteristics that:
(1) the prepared copper-aluminum bimetal oxide/durian shell fiber (Cu-Al/DBF) composite material has the advantages of convenient and easily obtained raw materials, simple preparation process, low cost and better biocompatibility;
(2) the prepared copper-aluminum bimetal oxide/durian shell fiber (Cu-Al/DBF) composite material has higher specific surface area and surface reaction activity and can be used as a high-efficiency water treatment adsorbent;
(3) the prepared copper-aluminum bimetal oxide/durian shell fiber (Cu-Al/DBF) composite material has mild adsorption conditions for ammonia nitrogen in water, can realize higher removal rate at normal temperature, and can be recycled.
The sodium hydroxide, acetic acid, hydrochloric acid, sodium hypochlorite, aluminum nitrate, hexamethylenetetramine, ammonium chloride and copper nitrate used in the invention are all from chemical reagents of national medicine group, Inc.
Advantageous effects
According to the invention, the copper-aluminum bimetal oxide modified durian shell fiber composite material prepared by using the common waste durian shell biomass resources in life through a simple hydrothermal and calcining method can effectively remove ammonia nitrogen in a water body at normal temperature, and the material can be recycled, so that the preparation cost is reduced to the maximum extent, and the adsorption performance is improved. The method has a good application prospect in the field of efficiently removing ammonia nitrogen in wastewater, and has the advantages of energy conservation, environmental protection, convenience in recovery and the like.
Drawings
FIG. 1, DBF (A, B), Al at different magnifications prepared in example 42O3SEM of/DBF (C, D), Cu-Al/DBF (E, F);
FIG. 2 DBF, Al prepared in example 42O3XRD of/DBF and Cu-Al/DBF.
Detailed Description
The present invention will be described in detail below with reference to examples to enable those skilled in the art to better understand the present invention, but the present invention is not limited to the following examples.
Unless otherwise defined, terms (including technical and scientific terms) used herein should be construed to have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
A preparation method of a copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material comprises the following steps:
a) soaking the crushed durian shell in a sodium hydroxide solution at 20 ℃ for 2h, removing impurities, washing the obtained yellow filamentous biomass fiber with deionized water, adding an acetic acid acidified sodium hypochlorite solution, bleaching for 1h, washing, and drying to finally obtain white fiber (DBF);
b) preparing 0.1mol/L aluminum nitrate solution, soaking the obtained white fiber for 2 hours, and filtering. Calcining the dried sample at 250 ℃ for 1h under the nitrogen condition to obtain the aluminum oxide coated durian shell fiber (Al)2O3/DBF)；
c) Copper nitrate and Al were added in a solid-to-liquid ratio of 0.2g to 0.1g to 0.25g to 50mL2O3dissolving/DBF and hexamethylenetetramine in deionized water, fully stirring, transferring to a stainless steel reaction kettle, reacting for 6 hours at 60 ℃, filtering, washing, and calcining the dried product for 2 hours at 250 ℃ to obtain the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material (Cu-Al/DBF).
Removing ammonia nitrogen in the water body:
adding 10mg of Cu-Al/DBF into every 10mL of 100mg/L ammonium chloride solution, adjusting the pH value of the solution to 3, adsorbing for 2 hours at the temperature of 25 ℃, measuring the concentration of ammonia nitrogen by an ultraviolet spectrophotometry, and calculating the removal efficiency of the material on the ammonia nitrogen.
The removal rate of the prepared adsorbent to ammonia nitrogen reaches 15%.
Example 2
A preparation method of a copper-aluminum bimetal oxide modified durian shell fiber composite material comprises the following steps:
a) soaking the crushed durian shell in a sodium hydroxide solution at 40 ℃ for 5h, removing impurities, washing the obtained yellow filament-like biomass fiber with deionized water, adding an acetic acid acidified sodium hypochlorite solution, bleaching for 2h, washing, and drying to finally obtain white fiber (DBF);
b) 0.4mol/L aluminum nitrate solution is prepared, and the obtained white fiber is soaked for 6 hours and then filtered. Calcining the dried sample at 600 ℃ for 4h under the nitrogen condition to obtain the aluminum oxide coated durian shell fiber (Al)2O3/DBF)；
c) Copper nitrate and Al were added in a solid-to-liquid ratio of 0.5g to 0.4g to 1.2g to 100mL2O3dissolving/DBF and hexamethylenetetramine in deionized water, fully stirring, transferring to a stainless steel reaction kettle, reacting for 12 hours at 100 ℃, filtering, washing, and calcining the dried product for 6 hours at 450 ℃ to obtain the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material (Cu-Al/DBF).
Removing ammonia nitrogen in the water body:
adding 40mg of Cu-Al/DBF into every 10mL of 100mg/L ammonium chloride solution, adjusting the pH value of the solution to 5, adsorbing for 2 hours at the temperature of 40 ℃, measuring the concentration of ammonia nitrogen by an ultraviolet spectrophotometry, and calculating the removal efficiency of the material on the ammonia nitrogen.
The removal rate of the prepared adsorbent to ammonia nitrogen reaches 66%.
Example 3
A preparation method of a copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material comprises the following steps:
a) soaking the crushed durian shell in a sodium hydroxide solution at 60 ℃ for 3h, removing impurities, washing the obtained yellow filamentous biomass fiber with deionized water, adding an acetic acid acidified sodium hypochlorite solution, bleaching for 5h, washing, and drying to finally obtain white fiber (DBF);
b) preparing 0.6mol/L aluminum nitrate solution, soaking the obtained white fiber for 4h, filtering, drying to obtain a sample, calcining the sample at 300 ℃ for 3h under the nitrogen condition to obtain the aluminum oxide coated durian shell fiber (Al)2O3/DBF)；
c) Copper nitrate and Al are added according to the solid-to-liquid ratio of 0.8g to 0.3g to 1.0g to 120mL2O3the/DBF and the hexamethylenetetramine are dissolved inFully stirring in deionized water, transferring to a stainless steel reaction kettle, reacting at 120 ℃ for 6 hours, filtering, washing, calcining the dried product at 750 ℃ for 4 hours to obtain the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material (Cu-Al/DBF).
Removing ammonia nitrogen in the water body:
adding 70mg of Cu-Al/DBF into every 10mL of 100mg/L ammonium chloride solution, adjusting the pH value of the solution to 6, adsorbing for 2 hours at the temperature of 40 ℃, measuring the concentration of ammonia nitrogen by an ultraviolet spectrophotometry, and calculating the removal efficiency of the material on the ammonia nitrogen.
The removal rate of the prepared adsorbent to ammonia nitrogen reaches 78%.
Example 4
A preparation method of a copper-aluminum bimetal oxide modified durian shell fiber composite material comprises the following steps:
a) soaking the crushed durian shell in a sodium hydroxide solution at 80 ℃ for 4h, removing impurities, washing the obtained yellow filamentous biomass fiber with deionized water, adding an acetic acid acidified sodium hypochlorite solution, bleaching for 3h, washing, and drying to finally obtain white fiber (DBF);
b) preparing 0.5mol/L aluminum nitrate solution, soaking the obtained white fiber for 5h, filtering, drying to obtain a sample, calcining the sample at 500 ℃ for 2h under the nitrogen condition to obtain the aluminum oxide coated durian shell fiber (Al)2O3/DBF)；
c) Copper nitrate and Al were added in a solid-to-liquid ratio of 0.6g to 0.3g to 0.5g to 75mL2O3dissolving/DBF and hexamethylenetetramine in deionized water, fully stirring, transferring to a stainless steel reaction kettle, reacting for 10 hours at 90 ℃, filtering, washing, and calcining the dried product for 4 hours at 500 ℃ to obtain the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material (Cu-Al/DBF).
Removing ammonia nitrogen in the water body:
adding 50mg of Cu-Al/DBF into every 10mL of 100mg/L ammonium chloride solution, adjusting the pH value of the solution to 7, adsorbing for 2 hours at the temperature of 25 ℃, measuring the concentration of ammonia nitrogen by an ultraviolet spectrophotometry, and calculating the removal efficiency of the material on the ammonia nitrogen.
The removal rate of the prepared adsorbent to ammonia nitrogen reaches 95 percent.
Example 5
A preparation method of a copper-aluminum bimetal oxide modified durian shell fiber composite material comprises the following steps:
a) soaking the crushed durian shell in a sodium hydroxide solution at 95 ℃ for 2h, removing impurities, washing the obtained yellow filamentous biomass fiber with deionized water, adding an acetic acid acidified sodium hypochlorite solution, bleaching for 5h, washing, and drying to finally obtain white fiber (DBF);
b) preparing 0.8mol/L aluminum nitrate solution, soaking the obtained white fiber for 2h, filtering, drying to obtain a sample, calcining the sample at 650 ℃ for 2.5h under the nitrogen condition to obtain the aluminum oxide coated durian shell fiber (Al)2O3/DBF)；
c) Copper nitrate and Al were added in a solid-to-liquid ratio of 1.0g:0.3g:1.25g:150mL2O3dissolving/DBF and hexamethylenetetramine in deionized water, fully stirring, transferring to a stainless steel reaction kettle, reacting for 12 hours at 120 ℃, filtering, washing, and calcining the dried product for 8 hours at 300 ℃ to obtain the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material (Cu-Al/DBF).
Removing ammonia nitrogen in the water body:
adding 60mg of Cu-Al/DBF into every 10mL of 100mg/L ammonium chloride solution, adjusting the pH value of the solution to 12, adsorbing for 2 hours at the temperature of 55 ℃, measuring the concentration of ammonia nitrogen by an ultraviolet spectrophotometry, and calculating the removal efficiency of the material on the ammonia nitrogen.
The removal rate of the prepared adsorbent to ammonia nitrogen reaches 10 percent.
Example 6
A preparation method of a copper-aluminum bimetal oxide modified durian shell fiber composite material comprises the following steps:
a) soaking the crushed durian shell in a sodium hydroxide solution at 100 ℃ for 6h, removing impurities, washing the obtained yellow filament-like biomass fiber with deionized water, adding an acetic acid acidified sodium hypochlorite solution, bleaching for 6h, washing, and drying to finally obtain white fiber (DBF);
b) preparing 1mol/L aluminum nitrate solution, soaking the obtained white fiber for 10h, filtering, drying to obtain a sample, calcining the sample at 800 ℃ for 4h under the nitrogen condition to obtain the aluminum oxide coated durian shell fiber (Al)2O3/DBF)；
c) Copper nitrate and Al are added according to the solid-to-liquid ratio of 1.2g to 0.5g to 1.5g to 200mL2O3dissolving/DBF and hexamethylenetetramine in deionized water, fully stirring, transferring to a stainless steel reaction kettle, reacting for 12 hours at 150 ℃, filtering, washing, and calcining the dried product for 8 hours at 750 ℃ to obtain the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material (Cu-Al/DBF).
Removing ammonia nitrogen in the water body:
adding 80mg of Cu-Al/DBF into every 10mL of 100mg/L ammonium chloride solution, adjusting the pH value of the solution to 13, adsorbing for 2 hours at the temperature of 55 ℃, measuring the concentration of ammonia nitrogen by an ultraviolet spectrophotometry, and calculating the removal efficiency of the material on the ammonia nitrogen.
The removal rate of the prepared adsorbent to ammonia nitrogen reaches 12.5 percent.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims (10)

1. A preparation method of a copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material is characterized by comprising the following steps:
a) soaking the crushed durian shells in a sodium hydroxide solution at the temperature of 20-100 ℃ for 2-6 h, removing impurities, washing the obtained yellow filamentous biomass fibers with deionized water, adding an acetic acid acidified sodium hypochlorite solution, bleaching for 1-6 h, washing and drying to obtain white fibers DBF;
b) preparing 0.1-1 mol/L aluminum nitrate solution, soaking the obtained white fiber for 2-10 h, filtering, and drying to obtain a sampleCalcining the product for 1-4 h at 250-800 ℃ under the nitrogen condition to obtain aluminum oxide coated durian shell fiber Al2O3/DBF；
c) Copper nitrate and Al are added according to a solid-to-liquid ratio of 0.2-1.2 g, 0.1-0.5 g, 0.25-1.5 g, 50-200 mL2O3dissolving/DBF and hexamethylenetetramine in deionized water, fully stirring, transferring to a stainless steel reaction kettle, reacting for 6-12 h at 60-150 ℃, filtering, washing and drying, and calcining the material at 250-750 ℃ for 2-8 h to obtain the catalyst.
2. The preparation method of the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material according to claim 1, characterized by comprising the following steps: in the step a), the concentration of the sodium hydroxide solution is 0.1-2M, and the sodium hypochlorite solution acidified by acetic acid is obtained by dissolving sodium hypochlorite in water according to the mass fraction of 5% and then adjusting the pH value to 4 by using acetic acid.
3. The preparation method of the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material according to claim 1, characterized by comprising the following steps: soaking the crushed durian shells in the sodium hydroxide solution for 4 hours at the temperature of 80 ℃ in the step a).
4. The preparation method of the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material according to claim 1, characterized by comprising the following steps: adding an acetic acid acidified sodium hypochlorite solution into the solution obtained in the step a) to bleach the solution for 3 hours.
5. The preparation method of the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material according to claim 1, characterized by comprising the following steps: preparing 0.5mol/L aluminum nitrate solution in the step b), soaking the obtained white fiber for 5 hours, and filtering.
6. The preparation method of the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material according to claim 1, characterized by comprising the following steps: calcining at 500 ℃ for 2h under nitrogen in step b).
7. The preparation method of the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material according to claim 1, characterized by comprising the following steps: in the step c), the solid-to-liquid ratio is 0.6g to 0.3g to 0.5g to 75 mL.
8. The preparation method of the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material according to claim 1, characterized by comprising the following steps: transferring the material into a stainless steel reaction kettle in the step c), reacting for 10 hours at 90 ℃, filtering, washing and drying the material, and calcining for 4 hours at 500 ℃.
9. The copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material prepared by the method of any one of claims 1 to 8.
10. Use of a material according to claim 9, wherein: the copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material is applied to removal of ammonia nitrogen pollutants in a water body.
CN202010717421.1A 2020-07-23 2020-07-23 Preparation of copper-aluminum bimetal oxide modified durian shell biomass carbon fiber composite material and application of composite material in removing ammonia nitrogen in water Pending CN111905694A (en)

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Application publication date: 20201110