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A kind of magnetic nano-adsorbent for adsorbing mercury ions and its preparation and application

A magnetic nanometer and adsorbent technology, applied in the direction of adsorption water/sewage treatment, other chemical processes, chemical instruments and methods, etc., can solve the problem of poor selectivity of adsorption materials, achieve good magnetic effect, low price, avoid economical and environmental problems cost effect

Active Publication Date: 2022-03-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Technical problem: Aiming at the problem of poor selectivity of existing adsorbent materials, the present invention provides a magnetic nano-adsorbent for adsorbing mercury ions and its preparation and application

Method used

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  • A kind of magnetic nano-adsorbent for adsorbing mercury ions and its preparation and application
  • A kind of magnetic nano-adsorbent for adsorbing mercury ions and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The buffer solution of the tris(2-carboxyethyl)phosphine buffered solution of configuration 10mmol / L, is 7.4 with the NaOH solution adjustment buffer solution pH of 2mol / L; The aminomethane buffer solution was adjusted to pH=8 with 2mol / L NaOH, and then it was mixed with 100ml of Tris buffer solution with a concentration of 1.25mg / mL lysozyme to form a phase inversion solution; 0.5g was ultrasonically Uniformly dispersed Fe after treatment for 10 min 3 o 4 The nanoparticles were immersed in the phase transition mixture, and the reaction was mechanically stirred at room temperature for 2.5 h, so that the Fe 3 o 4 A layer of phase-transition lysozyme film is adhered to the surface of the nanoparticles, and then the mixed liquid is separated from solid and liquid by a permanent magnet, washed several times with deionization and dried at 50°C for 12 hours to obtain a magnetic phase-transition lysozyme film-coated nanomaterials.

[0029] The magnetic nano-adsorbent for a...

Embodiment 2

[0031] Configure the buffer solution of 20mmol / L tris(2-carboxyethyl)phosphine, adjust the buffer solution pH to 7.2 with 2mol / L NaOH solution; The aminomethane buffer solution was adjusted to pH=10 with 2mol / L NaOH, and then it was mixed with 100ml tris buffer solution with a concentration of 1mg / mL lysozyme to form a phase inversion solution; 0.5g was ultrasonically treated Evenly dispersed Fe after 10min 3 o 4 The nanoparticles were immersed in the phase transition mixture, and reacted in an ultrasonic cleaner at room temperature for 2 h, so that the Fe 3 o 4 A layer of phase-transition lysozyme film is adhered to the surface of the nanoparticles, and then the mixed liquid is separated from solid and liquid by a permanent magnet, washed several times with deionization and dried at 50°C for 12 hours to obtain a magnetic phase-transition lysozyme film-coated nanomaterials.

[0032] The magnetic nano-adsorbent for adsorbing mercury ions is used for the adsorption treatment...

Embodiment 3

[0034] Configure the buffer solution of 4 trishydroxymethylaminomethanes of 10mmol / L, adjust the buffer solution pH to 7.0 with the NaOH solution of 2mol / L; Use 2mol / L NaOH to adjust the pH=5 of the hydroxymethylaminomethane buffer solution, then mix it with 100ml concentration of 3mg / ml lysozyme Tris buffer solution to form a phase inversion solution; Uniformly dispersed Fe after treatment for 10 min 3 o 4 The nanoparticles were immersed in the phase transition mixture, and dispersed for 3 h at room temperature using an ultrasonic disperser, so that Fe 3 o 4 A layer of phase-transition lysozyme film is adhered to the surface of the nanoparticles, and then the mixed liquid is separated from solid and liquid by a permanent magnet, washed several times with deionization and dried at 50°C for 12 hours to obtain a magnetic phase-transition lysozyme film-coated nanomaterials.

[0035] The magnetic nano-adsorbent for adsorbing mercury ions is used for the adsorption treatment of...

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Abstract

The invention relates to a magnetic nano-adsorbent for adsorbing mercury ions and its preparation and application. The magnetic nano-adsorbent is a core-shell structure adsorbent with a magnetic nano-ferric oxide as the core and an amyloid lysozyme film as the shell. The particle size of the three irons is 20-200nm, and the film thickness of the shell amyloid lysozyme is 20-50nm. Synthesis of Magnetic Fe with Uniform Particle Size by Co-precipitation or Solvothermal Method 3 o 4 Nanoparticles; lysozyme molecules undergo a phase transition under the action of a reducing agent tris (2-carboxyethyl) phosphine hydrochloric acid solution, and can adhere to the magnetic Fe 3 o 4 Nanoparticle surface, thus constructing magnetic nanoadsorption materials with core-shell structure. The magnetic nano-adsorption material has a large specific surface area, and the surface has abundant active functional groups such as hydroxyl, carboxyl, amino, mercapto, and benzene rings. Among them, the mercapto functional groups with a relatively high content on the surface of the material can have a strong chelation effect with mercury ions. Hg 2+ Has a very good adsorption effect.

Description

technical field [0001] The invention relates to a magnetic nano-adsorbent for adsorbing mercury ions and its preparation and application, belonging to the technical field of environmental functional materials. Background technique [0002] With the rapid development of human civilization and social economy, many environmental problems have been caused. In my country, due to the development of mining, metallurgy, chemical and electronics industries, a large amount of heavy metal wastewater containing mercury ions has been produced. When heavy metal ions accumulate in the water environment to a certain extent, they will cause harm to organisms in the water body, and cell function may be damaged. , reduced photosynthetic rate, developmental stagnation, and even death. At the same time, mercury ions will also affect human health through the amplification of the food chain. Therefore, it is of great significance to study new methods and materials for the treatment of mercury-cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/24B01J20/28009B01J20/28007C02F1/285C02F2101/20
Inventor 孙越李啸
Owner SOUTHEAST UNIV