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Novel heavy metal absorbent

An adsorbent, heavy metal technology, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of insufficient active specific surface area, inability to remove mercury, and low adsorption activity.

Inactive Publication Date: 2010-10-20
纪秀磊 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

U.S. Patent 7404939 uses vanadium oxide modified titanium dioxide material as an adsorbent, but the adsorption activity of this material is significantly lower than that of activated carbon materials modified by halogen elements
Elemental sulfur can react with elemental mercury, but the known materials containing elemental sulfur do not have a large enough active specific surface area to efficiently adsorb mercury
Current commercial mercury removal materials cannot effectively and economically remove mercury in the gas phase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Disperse 9.5 grams of a mesoporous carbon material (CMK-3) with a regular pore structure and 0.5 grams of commercially available elemental sulfur into a container filled with 500 milliliters of deionized water, and mix the two substances with vortex friction mixing. Mixing was performed by stirring the mixture vigorously for 2 hours using a magnetic stirrer bar. The mixture is filtered to remove water from the mixture. The scanning electron micrograph in Fig. 1 shows the surface morphology of a particle of a sulfur-carbon mixture prepared by the vortex friction mixing method, and a regular strip-like structure can be observed. figure 2 Shown is the X-ray electron spectrogram of the carbon and sulfur elements in the sulfur-carbon mixture particles in Fig. 1. It can be seen that elemental sulfur is evenly distributed throughout the particles of the sulfur-carbon mixture. Combining the information provided by scanning electron microscope photos and X-ray electron spectr...

Embodiment 2

[0020] A kind of commercially available activated carbon, 9.5 grams of graphitized carbon black (Ketjen Black) and 0.5 gram of commercially available elemental sulfur are added to a container filled with 500 milliliters of deionized water, and then the mixture is fully stirred by an electromagnetic stirrer for 2 hours later. The mixture was filtered to remove water from the above mixture. Put the mixture into an oven at 125°C, and after heating for 2 hours, a sulfur-carbon nanocomposite material is prepared.

Embodiment 3

[0022] The sulfur-carbon nanocomposite material 0.1 gram that is synthesized in the embodiment two is dispersed into 2 liters of concentrations and is the chloroplatinic acid (chemical formula is H of 50 parts per million) 2 PtCl 6 ) in an aqueous solution. The mixture was then vigorously stirred for 30 minutes. The solids in the mixture are then filtered to complete the separation of platinum from solution. The black background transmission electron micrograph of the composite material adsorbing perchloroplatinic acid is shown in Figure 3. The bright spot in the distribution in Fig. 3 is from the chloroplatinic acid particles with high electron cloud density adsorbed on the sulfur-carbon nanocomposite. Figure 4 shows the thermogravimetric analysis of the composites adsorbed perchloroplatinic acid. Through the analysis of the results of the thermogravimetric test, it is not difficult to know that the sulfur-carbon nanocomposite material can absorb 35% of its own weight of ...

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Abstract

The invention relates to a preparation method of sulfur carbon nano composite material absorbent and application of the absorbent in recovery of heavy metal from a liquid phase or a gas phase. The preparation method of the absorbent comprises the following steps: fully stirring and mixing active carbon and sulfur substance in water by a vortex friction mixing method; and introducing molten-state sulfur substance on the surface in the pore canal of the active carbon particle by a melt infiltration method. In the sulfur carbon nano composite material, the sulfur substance is evenly attached on the surface and in pore canal of the active carbon material particle in an amorphous thin coating form. The sulfur carbon nano composite material has the remarkable characteristics of very large active specific surface area. The absorption principle is that a nano-thin layer of sulfur substance is used as a metal capture agent and a particle containing heavy metal, or steam, liquid drop and ion containing heavy metal to form a certain chemical action, and thereby the application that the heavy metal can be absorbed from the liquid phase and the gas phase can be realized.

Description

Technical field: [0001] The invention relates to a novel adsorbent capable of recovering heavy metals from a liquid phase or a gas phase, that is, a sulfur-carbon nanocomposite adsorbent. The invention relates to the preparation method of the adsorbent and the application of the adsorbent to adsorb heavy metals from the liquid phase and the gas phase. Background technique: [0002] The discharge of heavy metals or compounds containing heavy metals in the liquid or gas phase into the natural environment is not only a huge waste of resources, but also poses a great threat to human health. Many kinds of industrial wastewater are solutions or suspensions containing heavy metals; hot brine produced by nuclear power plants contains low concentrations of precious metals, such as palladium and ruthenium. Untreated heavy metal solutions or suspensions can cause serious pollution of water resources and soil. These heavy metals may finally enter the human body through the food chain....

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/02
Inventor 琳达斐内札纪秀磊
Owner 纪秀磊
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