A kind of magnetic mgo nano flower phosphate adsorbent and its preparation method and application

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, poor selectivity, etc., and achieve recycling and high adsorption selection. The effect of fast phosphorus adsorption rate

Active Publication Date: 2021-10-08
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 capacity, narrow pH adaptation range, poor selectivity, and slow adsorption rate.

Method used

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  • A kind of magnetic mgo nano flower phosphate adsorbent and its preparation method and application
  • A kind of magnetic mgo nano flower phosphate adsorbent and its preparation method and application
  • A kind of magnetic mgo nano flower phosphate adsorbent and its preparation method and application

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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 solution.

[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...

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 nano flower phosphate adsorbent as well as its preparation method and application, belonging to the technical field of adsorbents. The preparation method provided by the invention comprises the following steps: mixing polyvinylpyrrolidone, ethylene glycol, ammonia water, magnesium acetate and cobalt acetate, performing solvothermal reaction on the obtained mixed solution, and obtaining a solid product after separation; Calcining to obtain the magnetic MgO nano flower phosphate adsorbent; the temperature of the calcination is 600-900°C. The adsorbent prepared by the method of the present invention has a porous, lamellar flower-like structure, and the specific surface area is as high as 209m 2 / g, the effective adsorption sites are evenly distributed in the flower-like sheet. Due to the flower-like structure of the sheet, the effective adsorption sites are more abundant. Therefore, it has high adsorption selectivity under the interference of many anions, and the pH adaptability range Wider, faster phosphorus adsorption rate, orthophosphate adsorption capacity as high as 230.5mg / 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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Patent Type & Authority Patents(China)
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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