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A nanometer zero-valent metal lightweight porous spherical functional material prepared based on meteorite, its preparation method and application

A porous spherical, nano-zero-valent technology, applied in the field of composite materials, can solve the problems of inability to achieve simultaneous denitrification and recovery, low porosity, low bioload, etc., to achieve reduced backwash energy consumption, high porosity, large The effect of specific surface area

Active Publication Date: 2022-01-28
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The problem solved by the present invention is that the fillers of the existing biological aerated filter have low porosity, low biological load, and cannot realize simultaneous denitrification and phosphorus recovery.

Method used

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  • A nanometer zero-valent metal lightweight porous spherical functional material prepared based on meteorite, its preparation method and application
  • A nanometer zero-valent metal lightweight porous spherical functional material prepared based on meteorite, its preparation method and application
  • A nanometer zero-valent metal lightweight porous spherical functional material prepared based on meteorite, its preparation method and application

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Experimental program
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Embodiment 1

[0067] In this embodiment, the preparation method of nanometer zero-valent metal lightweight porous spherical functional material comprises the following steps:

[0068] 1.1 Crush the meteorite to less than 0.0374mm, mix and disperse it with alcohol, and then dry it. The dried meteorite powder is reduced and calcined in a hydrogen atmosphere at a calcination temperature of 600°C for 3 hours to obtain a nano-zero-valent metal composite material;

[0069] 1.2 The mass ratio of ordinary Portland cement, natural zeolite powder, quicklime, gypsum and aluminum powder is: ordinary Portland cement 10-30%, zeolite 50-60%, quicklime 1-15%, gypsum 1-13% %, aluminum powder 0.1-2% mixed to prepare the mixture;

[0070] 1.3 Put the polyethylene porous spherical plastic particles into a mechanical drum, and evenly sprinkle the mixture on the polyethylene porous spherical plastic particles to obtain a porous functional material; wherein, the polyethylene porous spherical plastic particles hav...

Embodiment 2

[0077] In this embodiment, the preparation method of nanometer zero-valent metal lightweight porous spherical functional material comprises the following steps:

[0078] 2.1 Crush the meteorite to less than 0.0374mm, mix and disperse it with alcohol, and then dry it. Calcinate the dried meteorite powder in a hydrogen atmosphere at a temperature of 900°C for 2 hours to prepare a nano-zero-valent metal composite material;

[0079] 2.2 The mass ratio of ordinary Portland cement, natural zeolite powder, quicklime, gypsum and aluminum powder is: ordinary Portland cement 10-30%, zeolite 50-60%, quicklime 1-15%, gypsum 1-13% %, aluminum powder 0.1-2% mixed to prepare the mixture;

[0080] 2.3 Put polyethylene porous spherical plastic particles into a mechanical drum, and evenly sprinkle the mixture on the polyethylene porous spherical plastic particles to obtain a porous functional material, and evenly spray some water, so that the porous functional material becomes spherical under ...

Embodiment 3

[0086] In this embodiment, the preparation method of nanometer zero-valent metal lightweight porous spherical functional material comprises the following steps:

[0087] 3.1 Crush the meteorite to less than 0.0374mm, mix it with alcohol and disperse it, then dry it, and calcinate the dried meteorite powder in a hydrogen atmosphere at a temperature of 400°C for 5 hours to obtain a nano-zero-valent metal composite material;

[0088] 3.2 The mass ratio of ordinary Portland cement, natural zeolite powder, quicklime, gypsum and aluminum powder is: ordinary Portland cement 10-30%, zeolite 50-60%, quicklime 1-15%, gypsum 1-13% %, aluminum powder 0.1-2% mixed to prepare the mixture;

[0089] 3.3 Put polyethylene porous spherical plastic particles into a mechanical drum, and evenly sprinkle the mixture on the polyethylene porous spherical plastic particles to obtain a porous functional material, and evenly spray some water, so that the porous functional material becomes spherical unde...

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Abstract

The invention provides a nanometer zero-valent metal light porous spherical functional material prepared based on meteorite, its preparation method and application. The preparation method of the nanometer zero-valent metal lightweight porous spherical functional material comprises: step S1, using meteorite powder as raw material to obtain a nanometer zero-valent metal composite material through reduction and calcination; step S2, making zeolite, cement, quicklime, aluminum powder , gypsum and surfactant to obtain a mixture; step S3, using polyethylene porous spherical plastic particles as a skeleton, uniformly adhering the mixture to the skeleton to prepare a zeolite-based lightweight porous spherical functional material. In step S4, the nanometer zero-valent metal composite material is evenly sprayed on the zeolite-based lightweight porous spherical functional material to obtain the nanometer zerovalent metal lightweight porous spherical functional material. The invention has multi-level pores, higher porosity and larger specific surface area, regular shape and light weight.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a nanometer zero-valent metal light porous spherical functional material prepared based on meteorite, its preparation method and application. Background technique [0002] Phosphorus is one of the indispensable nutrients for human survival. It is mainly stored in the earth's crust in the form of phosphate rock, which is a non-metallic mineral resource that is difficult to regenerate. Phosphorus flows in a straight line of "land → ocean" on the earth. More than 80% of the phosphorus mined from phosphate rocks is used for the production of phosphate fertilizers. More than 50% of the phosphorus in the phosphate fertilizers that has not been absorbed by crops will form surface runoff due to the erosion of rainwater. In the case of treatment, it enters the surface water body with the excrement; finally, phosphorus enters the ocean according to the natural law of "all rive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/10C02F3/28C02F3/34C02F101/10C02F101/16C02F101/30
CPCC02F3/105C02F3/109C02F1/288C02F1/58C02F1/42C02F3/2806C02F3/342C02F1/72C02F2101/16C02F2101/30C02F2101/105Y02W10/10
Inventor 鲍腾金杰吴克王晓飞卫新来张勇
Owner HEFEI UNIV
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