Magnetic MgO nanoflower phosphate adsorbent, preparation method and application thereof

A flower phosphate and adsorbent technology, applied in the field of magnetic MgO nanoflower phosphate adsorbent and its preparation, can solve the problems of narrow pH adaptation range, slow adsorption rate, small adsorption amount, etc., and achieve recycling and reuse, high adsorption Selectivity, the effect of fast phosphorus adsorption rate

Active Publication Date: 2020-11-06
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current adsorbents still have problems such as small adsorption ca

Method used

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  • Magnetic MgO nanoflower phosphate adsorbent, preparation method and application thereof
  • Magnetic MgO nanoflower phosphate adsorbent, preparation method and application thereof
  • Magnetic MgO nanoflower phosphate adsorbent, preparation method and application thereof

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preparation example Construction

[0032] The invention provides a method for preparing a magnetic MgO nano flower phosphate adsorbent, comprising the following steps:

[0033] mixing polyvinylpyrrolidone, ethylene glycol, ammonia water, magnesium acetate and cobalt acetate, subjecting the obtained mixed solution to solvothermal reaction, and obtaining a solid product after separation;

[0034] Calcining the solid product to obtain a magnetic MgO nano flower phosphate adsorbent;

[0035] The calcination temperature is 600-900°C.

[0036] In the present invention, unless otherwise specified, the raw materials used are commercially available products well known in the art.

[0037] The invention mixes polyvinylpyrrolidone, ethylene glycol, ammonia water, magnesium acetate and cobalt acetate to obtain a mixed liquid.

[0038] In the present invention, the mixing process preferably includes: dissolving polyvinylpyrrolidone in ethylene glycol, then adding ammonia water dropwise, then adding magnesium acetate and c...

Embodiment 1

[0053] Dissolve 0.8g of PVP (polyvinylpyrrolidone) in 80mL of EG (ethylene glycol), and drop into 400μL of ammonia water; then dissolve 2.68mmol of magnesium acetate and 1.68mmol of cobalt acetate in the above mixed solution, and stir gently for 30min after completely dissolving After the stirring is completed, put the mixed solution into a polytetrafluoroethylene liner, heat it in a 200°C reactor for 24 hours to carry out solvothermal reaction; after the solvothermal reaction is completed, centrifuge the above solution, and wash the obtained precipitate with ethanol for 3 After drying for 12 hours in a vacuum drying oven; after drying, put the sample into a muffle furnace and calcinate at 600°C (temperature rise program 1°C / min) under nitrogen protection to obtain a magnetic MgO nano-flower phosphate adsorbent, which is denoted as NFMgCo-600.

Embodiment 2

[0055] The difference from Example 1 is that the calcination temperature is 800°C, which is recorded as NFMgCo-800.

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Abstract

The invention provides a magnetic MgO nanoflower phosphate adsorbent, a preparation method and application thereof, and belongs to the technical field of adsorbents. The preparation method provided bythe invention comprises the following steps: mixing polyvinylpyrrolidone, ethylene glycol, ammonia water, magnesium acetate and cobalt acetate, carrying out a solvothermal reaction on the obtained mixed solution, and separating to obtain a solid product; and calcining the solid product to obtain a magnetic MgO nanoflower phosphate adsorbent, wherein the calcination temperature is 600 to 900 DEG C. The adsorbent prepared by the method provided by the invention has a porous lamellar flower-shaped structure, wherein the specific surface area is up to 209 m<2>/g, the effective adsorption sites are uniformly distributed in the flower-like lamellas, and the effective adsorption sites are rich due to the lamellar flower-like structure, so that the adsorbent has high adsorption selectivity, wid pH application range and high phosphorus adsorption rate under the interference of numerous anions, and the orthophosphate adsorption capacity is as high as 230.5 mg/g.

Description

technical field [0001] The invention relates to the technical field of adsorbents, in particular to a magnetic MgO nano-flower phosphate adsorbent and a preparation method and application thereof. Background technique [0002] Phosphorus (P), as one of the basic elements of biological growth and reproduction, excessive release to aquatic ecosystems will promote the explosive growth of harmful algal blooms, thereby deteriorating water quality, leading to the death of a large number of aquatic organisms, and ultimately destroying the balance of ecosystems (i.e. Eutrophication). Therefore, how to scientifically and efficiently remove and control the phosphorus content in water is an important means to control water eutrophication pollution. [0003] At present, among many water phosphorus removal methods, adsorption method has been widely concerned because of its low cost, easy operation, high selectivity and good circulation. However, the current adsorbents still have proble...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/28B01J20/30C02F1/28C02F1/48C02F101/10
CPCB01J20/041B01J20/28009B01J20/28061B01J20/28083B01J20/3078B01J20/3085C02F1/281C02F1/488C02F2101/105C02F2209/18
Inventor 漆新华刘小宁
Owner NANKAI UNIV
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