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Trivalent arsenic adsorbent as well as preparation method and application thereof

An adsorbent, trivalent arsenic technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc. trouble, etc.

Inactive Publication Date: 2015-05-13
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Inorganic arsenic mainly exists in two valence states of As(III) and As(V) in water, and the toxicity of arsenic compounds with different valence states is also different, for example, arsenous acid (III) is more toxic than arsenic acid (V) Nearly 60 times, there are many methods for removing arsenic in China. Traditional methods include chemical precipitation, redox, flocculation, ion exchange resin, and biological methods. However, these methods have large investment, high operating costs, troublesome operation and management, and It will produce secondary pollution and cannot solve the problems of metal and water resource reuse.

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  • Trivalent arsenic adsorbent as well as preparation method and application thereof
  • Trivalent arsenic adsorbent as well as preparation method and application thereof
  • Trivalent arsenic adsorbent as well as preparation method and application thereof

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Embodiment Construction

[0023] A kind of preparation method of trivalent arsenic adsorbent is characterized in that: comprising the following steps:

[0024] 1) Magnetic composite nano Fe 3 o 4 Preparation of Au, including Fe 3 o 4 Nanofabrication of Au in Fe 3 o 4 Packages on Nano;

[0025] Fe 3 o 4 Nano preparation:

[0026] 0.6 g FeCl 3 .6H 2 O and 0.2 g of sodium citrate were added to 20 mL of ethylene glycol, and ultrasonically stirred evenly; 1.0 g of sodium acetate was added under stirring, and after stirring for 2 hours, the mixed solution was transferred to a high-pressure reaction kettle lined with polytetrafluoroethylene , heated and kept at 200°C for 10 h; naturally cooled to room temperature, discarded the supernatant, and obtained black Fe 3 o 4 After the magnetic nanoparticles are washed 3-5 times, they are dispersed in water for use;

[0027] Au in Fe 3 o 4 Packages on Nano:

[0028] Take 1 mL Fe 3 o 4 Add 50 mL of ethanol to the aqueous solution, ultrasonically disp...

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Abstract

The invention discloses a preparation method of a trivalent arsenic adsorbent. The method comprises steps as follows: preparation of magnetic composite nanoparticles Fe3O4@Au, modification of core-shell structured nanoparticles and the like. After a glutathione ligand is grafted, due to formation of an As-O bond, to-be-detected trivalent arsenic can be captured; meanwhile, under the action of an externally applied magnetic field, magnetic composite nanoparticles which capture the trivalent arsenic can be effectively enriched and can be conveniently separated from a solution.

Description

technical field [0001] The invention relates to a preparation method and application of a trivalent arsenic adsorbent. Background technique [0002] As a highly toxic element, arsenic exists widely in natural water bodies and human drinking water. The presence of arsenic is the result of a combination of natural reactions (such as biological activity, geochemical reactions, volcanic eruptions, etc.) and man-made emissions (pesticides, chemicals, semiconductor manufacturing, etc.). Arsenic dissolved in water not only pollutes the environment, but also threatens human health. People drink and eat water and food containing arsenic for a long time, which will accumulate arsenic in the human body and make people more prone to cancer (such as skin cancer) , lung cancer, liver cancer, kidney cancer, bladder cancer, etc.). With the increasing arsenic poisoning situation, the World Health Organization (WHO) revised the drinking water quality standard as early as 1993, reducing the ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/223B01J20/28009C02F1/285C02F2101/103
Inventor 葛明贾雪平陈婷婷王南平
Owner NANTONG UNIVERSITY
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