Biomass carbon fiber/layered double metal hydroxide adsorption material for phosphorus removal

A layered bimetallic, hydroxide technology, applied in the directions of alkali metal oxide/hydroxide, alkali metal compound, adsorbed water/sewage treatment, etc., can solve the problem of general adsorption performance of adsorbent, low specific surface area of ​​adsorbent, The surface functional groups are not abundant, and the preparation process is simple and controllable, the preparation cost is low, and there is no secondary pollution.

Active Publication Date: 2018-09-14
EAST CHINA JIAOTONG UNIVERSITY
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Problems solved by technology

[0003] In summary, the problems in the prior art are: The existing adsorbents not only have low specific surface area, are not rich in surface functional groups, but also do not have specificity for adsorbate adsorption; the existing adsorbents have general adsorption performance.
[0004] The difficulty and significance of solving the above technical problems: Therefore, it is a good measure to modify or graft functional groups to existing adsorbents, but this will increase the cost of preparing adsorption and at the same time destroy the original structure of the adsorbent while modifying or grafting, so the development of green and environmentally friendly Adsorbents are necessary

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  • Biomass carbon fiber/layered double metal hydroxide adsorption material for phosphorus removal

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preparation example Construction

[0024] The invention provides a biomass carbon fiber / layered double metal hydroxide adsorption and dephosphorization material and a preparation method thereof. The preparation process of the material is simple and controllable, and the adsorption performance is improved through the double adsorption effect of the biomass carbon fiber / LDH. To achieve the purpose of efficient and rapid removal.

[0025] The biomass carbon fiber / layered double metal hydroxide adsorption and phosphorus removal material provided in the embodiment of the present invention is composed of biomass carbon fiber and layered double metal hydroxide. Biomass carbon fiber: aluminum salt: copper salt = 1-2:35:45.

[0026] The biomass carbon fiber / layered double metal hydroxide adsorption and dephosphorization material provided by the embodiment of the present invention is a layered double metal hydroxide that grows on the surface of the biomass carbon fiber in a crescent shape, and the biomass carbon fiber is...

Embodiment 1

[0036] The biomass carbon fiber / layered double metal hydroxide adsorption and phosphorus removal material provided by the embodiment of the present invention comprises the following steps:

[0037] a) The waste paper is added to a sodium hydroxide solution with a mass fraction of 2 wt %, stirred for 2 hours at 70° C., taken out, washed with deionized water until neutral, and dried. Prepare a 1wt% NaClO2 solution, adjust the pH value to 4 with acetic acid, and disperse the above-mentioned dried samples in NaClO 2Bleach was carried out in the solution, stirred at 60° C. for 3 hours, then washed with deionized water and ethanol until neutral, and dried in an oven at 80° C. for 10 hours to obtain biomass fibers.

[0038] b) The dried biomass fibers were taken out and placed in a tube furnace at a heating rate of 2°C / min to 400°C, calcined for 2 hours under nitrogen protection, and cooled naturally to obtain biomass carbon fibers.

[0039] c) Mix 30 mL of water and 15 mL of dimeth...

Embodiment 2

[0043] The biomass carbon fiber / layered double metal hydroxide adsorption and phosphorus removal material provided by the embodiment of the present invention comprises the following steps:

[0044] a) The waste paper was added to a potassium hydroxide solution with a mass fraction of 3 wt %, stirred for 3 hours at 70° C., taken out, washed with deionized water until neutral, and dried. Prepare 3wt% NaClO 2 solution, adjust the pH value to 4 with acetic acid, and disperse the above dried sample in NaClO 2 Bleaching was carried out in the solution, and stirred for 3 hours at 65° C.; then washed with deionized water and ethanol until neutral, and dried in an oven at 80° C. for 10 hours to obtain biomass fibers.

[0045] b) The dried biomass fibers were taken out and placed in a tube furnace at a heating rate of 4°C / min to 500°C, calcined for 2 hours under nitrogen protection, and cooled naturally to obtain biomass carbon fibers.

[0046] c) Mix 60 mL of water and 30 mL of dimet...

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Abstract

The invention belongs to the technical field of preparation, regeneration or reactivation, and discloses a biomass carbon fiber/layered double metal hydroxide adsorption material for phosphorus removal. The material is composed of biomass carbon fiber and layered double metal hydroxide, the layered double metal hydroxide grows on the surface of the biomass carbon fiber in a crescent sheet shape, and the biomass carbon fiber is prepared by using the steps of: extracting cellulose from biomass, and then performing carbonization, wherein the biomass carbon fiber has a length of 50-1500 mum and adiameter of 5-20 mum, and the layered double metal hydroxide is two-dimensional sheet-shaped copper-aluminum bimetallic hydrotalcite hydroxide which has a sheet thickness of 100 nm-1 mum and a copper-aluminum molar ratio of (2:1)-(4:1). The material has a simple and controllable preparation process, and the adsorption performance is improved through a double adsorption effect of the biomass carbonfiber/LDH, so that the purpose of efficient and rapid removal is achieved, the removal rate is up to 99.5%; therefore, reliable theory and actual support are provided for practical application.

Description

technical field [0001] The invention belongs to the technical field of preparation, regeneration or reactivation methods, and in particular relates to a biomass carbon fiber / layered double metal hydroxide adsorption and phosphorus removal material. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: In recent years, with the improvement of people's quality of life, the environment has become worse and worse. Large-scale algae blooms and red tides have broken out in most waters in my country, including reservoirs, lakes, and coastal waters, resulting in a decline in dissolved oxygen in water bodies and deterioration of water quality. Destroy the ecological balance of the water body. The reason for the eutrophication of the water body is that a large amount of phosphorus-containing wastewater is directly discharged into the water body without treatment or incomplete treatment, which makes the phosphorus content of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/20B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/08B01J20/20B01J20/28033C02F1/281C02F1/283C02F2101/105
Inventor 胡锋平王敏邱风仙彭小明张涛戴红玲罗文栋
Owner EAST CHINA JIAOTONG UNIVERSITY
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