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A kind of preparation method and application of magnetic nanometer inorganic arsenic adsorbent

A magnetic nanometer and magnetic nanoparticle technology, which is applied in inorganic chemistry, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of poor anti-interference ability, narrow application range, and low adsorption efficiency, and achieve anti-interference ability Strong, low cost, high adsorption efficiency

Active Publication Date: 2018-08-10
NANKAI UNIV
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Problems solved by technology

Although these adsorbents have the advantages of relatively simple preparation process and low preparation cost, they also have disadvantages such as low adsorption efficiency, poor anti-interference ability, narrow application range, and difficult recovery.

Method used

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  • A kind of preparation method and application of magnetic nanometer inorganic arsenic adsorbent
  • A kind of preparation method and application of magnetic nanometer inorganic arsenic adsorbent
  • A kind of preparation method and application of magnetic nanometer inorganic arsenic adsorbent

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Embodiment

[0023] A preparation method of a magnetic nano-inorganic arsenic adsorbent, the magnetic nano-inorganic arsenic adsorbent is CoFe with a mesoporous core-shell structure 2 o 4 @MIL-100(Fe), the steps are as follows:

[0024]1) Dissolve 148.7mg of cobalt chloride, 337.9mg of ferric chloride, 900.0mg of sodium acetate, and 500.0mg of polyethylene glycol-6000 in 10mL of ethylene glycol, stir at 50°C for 20 minutes to form a uniform brown solution, and transfer to into the reactor, 160 ° C hydrothermal reaction for 16 hours, the obtained black precipitate was magnetically separated and washed twice with ethanol and water, and dried in vacuum to obtain mesoporous CoFe 2 o 4 magnetic nanoparticles;

[0025] 2) 50mg of the above mesoporous CoFe 2 o 4 Add magnetic nanoparticles to 10mL 0.58mM ethanol solution of mercaptoacetic acid (MAA), under nitrogen protection, stir at room temperature for 24 hours for surface modification, wash the remaining mercaptoacetic acid on the surface...

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Abstract

Provided is a preparation method of a magnetic nanometer inorganic arsenic adsorbent. The adsorbent is CoFe2O4@MIL-100(Fe) of a mesoporous core-shell structure. The method includes the following steps of firstly, dissolving cobalt chloride, ferric chloride, natrium aceticum and polyethylene glycol-6000 in ethylene glycol, and conducting hydrothermal reaction at 160 DEG C for 16 h to prepare mesoporous CoFe2O4 magnetic nanoparticles; secondly, adding the CoFe2O4 nanoparticles to an ethyl alcohol solution of mercaptoacetic acid to be stirred for 24 h under the protection of nitrogen for surface modification; thirdly, alternatively soaking the modified CoFe2O4 in ferric chloride and a trimesic acid ethyl alcohol solution, and preparing a target object through a layer-by-layer self-assembly method. The method has the advantages that the method is simple in preparation process, easy to implement and low in cost; the magnetic nanometer adsorbent is high in inorganic arsenic removal efficiency and high in interference resistance and can efficiently remove trivalent arsenic and pentavalent arsenic in natural water at the same time without any pretreatment.

Description

technical field [0001] The invention belongs to the fields of nanometer material preparation and water pollution treatment, and in particular relates to a preparation method and application of a magnetic nanometer inorganic arsenic adsorbent. Background technique [0002] Arsenic (As) is widely distributed in nature, and the pollution of inorganic arsenic [As(V) and As(III)] in natural water has become a worldwide problem. At present, more than 100 million people in the world are still drinking arsenic-contaminated groundwater, and long-term drinking of arsenic-contaminated water is extremely harmful to the human body. The World Health Organization (WHO) has issued a decree to strictly control the arsenic content in drinking water. Therefore, it is very important for human health to develop an economical, efficient, environmentally friendly, and widely applicable adsorbent to remove inorganic arsenic from natural water. [0003] At present, the reported inorganic arsenic ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/28B01J20/22B01J20/32C02F1/28C02F101/20
CPCB01J20/226B01J20/28007B01J20/28009B01J20/28021B01J20/3272B01J2220/46B01J2220/4806B01J2220/4812C02F1/28C02F1/285C02F2101/103
Inventor 尹学博杨纪春
Owner NANKAI UNIV
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