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Ferric-carbon complex as well as preparation and application thereof

A composite, iron-carbon technology

Inactive Publication Date: 2015-06-03
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing Fe-C complex preparation method has the following disadvantages: (1) the synthesis method has at least two steps, such as first loading the iron precursor (iron salt or iron oxide) on the carbon, and then at high temperature It can be obtained by charcoal thermal reaction or hydrogen reduction under certain conditions (>500°C); (2) Thermal reaction requires a lot of energy, which increases product cost

Method used

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  • Ferric-carbon complex as well as preparation and application thereof
  • Ferric-carbon complex as well as preparation and application thereof
  • Ferric-carbon complex as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Use the wet grinding sand mill (model: MiniFer) of Germany Netzsch company laboratory to prepare iron-carbon nanocomposites; (2) grind the zirconia particles (particle size 0.9-1.1mm) Pack into the cavity of the wet grinding sand mill and occupy 80% of the cavity volume; (3) Weigh 4 grams of activated carbon and 36 grams of micron-sized zero-valent iron (below 10 microns in particle size) and 400 mL of propylene glycol in the sand mill. Stir continuously in the feeding tank and mix evenly; (4) Turn on the sand mill and adjust the grinding speed to 3000rpm; (5) Use a peristaltic pump to pump the mixed solution into the chamber of the sand mill for 4 hours of circular grinding; (6) ) Centrifuge the obtained particles from the solution, wash them with ethanol, and dry them in vacuum to obtain the finished iron-carbon composite.

[0033] figure 1 Prepare the scanning electron micrograph of iron-carbon composite body for embodiment 1, figure 1 It can be seen that the i...

Embodiment 2

[0041](1) Use the wet grinding sand mill (model: MiniFer) of Germany Netzsch company laboratory to prepare iron-carbon nanocomposites; (2) put the grinding medium iron ball (particle size 0.15mm) into the sand In the mill cavity, 80% of the cavity volume is occupied; (3) Weigh 4 grams of activated carbon and 36 grams of micron-sized zero-valent iron (below 10 microns in particle size) and 400 mL of ethanol in the feeding tank of the sand mill for continuous stirring, Mix evenly; (4) Turn on the sand mill and adjust the grinding speed to 3000rpm; (5) Use a peristaltic pump to pump the mixed solution into the cavity of the sand mill for 4 hours of circular grinding; (6) Grind the mixed solution , set aside to settle to remove the iron balls leaked from the vibrating sieve, pour out the upper mixed solution, centrifuge, wash the solid particles with ethanol, and dry them in vacuum to obtain the finished iron-carbon composite. The TEM and SEM images of the obtained product are sim...

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Abstract

The invention discloses a preparation method for a ferric-carbon complex which comprises the following steps that grinding mediums with volume accounting for 70%-80% of the volume of a cavity are arranged in the cavity of a wet-grinding sand mill, wherein the grinding mediums are iron balls with the diameter of 0.15 mm or zirconia with the particle size of 0.9-1.1 mm; active carbon powder and micron order iron powder are mixed according to the mass ratio of 1:(5-10), then a lubrication solvent is added, and grinding is carried out for 1-4 hours at a grinding speed of 2000-4000 rpm; the mixed liquor after grinding is subjected to solid-liquid separation, and solid particles are cleaned with ethyl alcohol, and are vacuum dried to obtain the ferric-carbon complex. The ferric-carbon complex prepared in the invention can be used for in-situ remediation of contamination with chlorinated organics and heavy metal contained in underground water.

Description

(1) Technical field [0001] The invention relates to an iron-carbon composite body and its preparation and application. (2) Background technology [0002] At present, as an emerging in-situ remediation technology for groundwater, nano-zero-valent iron has attracted widespread attention at home and abroad. However, there are still many problems due to the limitation of nano zero-valent iron due to its structure. For example, due to its magnetic properties and high surface energy, it is easy to aggregate into large particles and lose underground fluidity; its activity is high but its life is very short, and it cannot continuously degrade pollutants; The surface is hydrophilic and cannot attack sources of contamination of the organic phase, etc. [0003] In recent years, scholars at home and abroad have improved the existing problems by modifying the surface of nanometer zero-valent iron or loading it on other media. Due to the low cost of carbon and its strong adsorption of p...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J23/745C02F1/28C02F1/70C02F101/20C02F101/36C02F103/06
Inventor 何锋
Owner ZHEJIANG UNIV OF TECH
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