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Elemental mercury absorbent, and preparation method and application thereof

A technology of elemental mercury and adsorbent, which is applied in the field of elemental mercury adsorbent and its preparation, can solve complex problems and achieve the effects of simple preparation method, many regeneration times, and large adsorption capacity

Inactive Publication Date: 2010-09-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of both is that the collected samples must be digested. The entire collection, digestion, and testing process is very complicated and requires highly trained testers.

Method used

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  • Elemental mercury absorbent, and preparation method and application thereof
  • Elemental mercury absorbent, and preparation method and application thereof
  • Elemental mercury absorbent, and preparation method and application thereof

Examples

Experimental program
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Effect test

example 1

[0022] Example 1: Adsorbent preparation method (1)

[0023] 1) Place 5 g of carbon nanotubes in 100 ml of ethanol solvent, and ultrasonically oscillate for 240 minutes to prepare a suspension of carbon nanotubes;

[0024] 2) Mix 10ml of 0.005mol / L silver nitrate solution with the carbon nanotube suspension prepared in step 1), and ultrasonically stir for 5 minutes while mixing;

[0025] 3) The mixture obtained in step 2) was filtered, dried at 55° C. for 4 hours, and then heated at 250° C. for 2 hours to obtain a simple mercury adsorbent.

[0026] The adsorbent has a diameter of 10-200nm and a length of 0.01-3mm, and is composed of multi-wall carbon nanotubes with silver clusters evenly distributed on the surface, the diameter of the silver clusters is less than 0.9nm, and the mass content of silver is 0.1%.

example 2

[0027] Example 2: Adsorbent preparation method (two)

[0028] Put 10mg of carbon nanotubes in 10ml of ethanol solvent, and ultrasonically oscillate for 30 minutes to make a suspension of carbon nanotubes;

[0029] 1) 100ml of silver nitrate solution of 1mol / L is mixed with the carbon nanotube suspension prepared in step 1), and ultrasonically stirred while mixing for 60 minutes;

[0030] 2) The mixture obtained in step 2) was filtered, dried at 110° C. for 1 hour, and then heated at 500° C. for 0.5 hour to obtain the elemental mercury adsorbent.

[0031] The adsorbent has a diameter of 10-200nm and a length of 0.01-3mm, and is composed of multi-walled carbon nanotubes with silver clusters evenly distributed on the surface, the diameter of the silver clusters is less than 3nm, and the mass content of silver is 11.3%.

example 3

[0032] Example 3: Adsorbent preparation method (three)

[0033] 1) Place 1 g of carbon nanotubes in 100 ml of ethanol solvent, and ultrasonically oscillate for 150 minutes to prepare a suspension of carbon nanotubes;

[0034] 2) Mix 100ml of 0.1mol / L silver nitrate solution with the carbon nanotube suspension prepared in step 1), and ultrasonically stir for 20 minutes while mixing;

[0035] 3) The mixture obtained in step 2) was filtered, dried at 90° C. for 2 hours, and then heated at 350° C. for 1.5 hours to obtain a simple mercury adsorbent.

[0036] The adsorbent has a diameter of 10-200nm and a length of 0.01-3mm, and is composed of multi-walled carbon nanotubes with silver clusters evenly distributed on the surface, the diameter of the silver clusters is less than 1.3nm, and the mass content of silver is 4.6%.

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Abstract

The invention discloses an elemental mercury absorbent, and a preparation method and application thereof. The elemental mercury absorbent consists of multi-wall carbon nano-tubes; silver clusters are uniformly distributed on the surface of the multi-wall carbon nano-tube, wherein the multi-wall carbon nano-tube has a diameter of 10 to 200 nm and a length of 0.01 to 3 mm; the diameter of each silver cluster is less than 3 nm; the silver cluster contains 0.1 to 12 mass percent of silver; and a silver-loaded carbon nano-tube is produced by ultrasonically stirring, mixing, filtering, drying and thermally reducing the dispersive carbon nano-tubes and solution of silver nitrate. As the carbon nano-tube has amalgam reaction capacity and high elemental mercury absorption capacity, and desorbed mercury totally exists in a form of elemental mercury, the carbon nano-tube can be used as the elemental mercury absorbent for a bed material of an absorbent bed, can be used for the absorbent jetting and mercury removal of a flue, and also can be used for the sampling of the elemental mercury and the manufacturing of a mercury trap in a mercury testing system.

Description

technical field [0001] The invention belongs to adsorbent technology, and in particular relates to a simple mercury adsorbent and its preparation method and application. Background technique [0002] Mercury, especially methylmercury, has been proven to have irreversible toxic effects on the development and nervous system of humans, especially fetuses. The most famous example of mercury poisoning is the Minamata Incident in Japan, known as one of the "eight major public hazard incidents", which has affected the incident for decades and has tens of thousands of victims. Mercury is a trace element in nature, but since the industrial revolution, the mercury content in the atmosphere and biosphere has been increasing. In addition to natural releases, such as volcanic eruptions, these sources of mercury mainly come from man-made sources, including industrial production processes such as coal combustion, garbage incineration, and lamp factories. [0003] Mercury emitted from ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02G01N30/00
Inventor 罗光前姚洪徐明厚马晶晶骆骏
Owner HUAZHONG UNIV OF SCI & TECH
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