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Fe/C composite material and applications thereof

A composite material and solution technology, applied in the field of material chemistry, can solve the problems of zero-valent iron easy to agglomerate, achieve high-efficiency immobilization, and have wide application prospects

Active Publication Date: 2017-06-09
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is aimed at traditional NaBH 4 The problem of easy agglomeration of zero-valent iron prepared by liquid phase reduction method provides a carbothermal reduction preparation method of Fe / C composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this embodiment, flour is selected as the carbon source, and ferrous sulfate is selected as the zero-valent iron precursor. Ferrous sulfate is prepared into a 5mol / L iron-containing solution for subsequent use. The preparation of the Fe / C composite material in this embodiment may comprise the following steps:

[0024] Step 1): Add 100 g of flour to the iron-containing solution with a volume of 1 L and a concentration of 5 mol / L, and shake it well. In order to fully mix the flour and ferrous sulfate solution, ultrasound can be assisted. At a water bath temperature of 40° C., stir and mix with magnetic force for 24 hours, fully stir and mix, and then use ammonia water to control the pH value of the iron-containing solution added with the carbon source to be 8.5. After adjusting the pH value, stir and heat at a water bath temperature of 70°C until a gel is formed, and then transfer to a vacuum drying oven at 100°C and heat until completely dry.

[0025] Step 2): Place...

Embodiment 2

[0027] In this embodiment, sucrose is selected as the carbon source, and ferric sulfate is selected as the zero-valent iron precursor. Ferric sulfate is formulated into a 5mol / L iron-containing solution for subsequent use. The preparation of the Fe / C composite material in this embodiment may comprise the following steps:

[0028] Step 1): Add 150 g of sucrose to the iron-containing solution with a volume of 1 L and a concentration of 5 mol / L, shake and shake well. At a water bath temperature of 40° C., magnetically stirred and mixed for 24 hours, and then ammonia water was used to control the pH value of the iron-containing solution added with the carbon source to be 8.1. After adjusting the pH value, stir and heat at a water bath temperature of 70°C until a gel is formed, then transfer to a vacuum drying oven at 110°C and heat until completely dry.

[0029] Step 2): The product obtained in step 1) is placed in a ceramic ark, and placed in a quartz tube electric furnace with...

Embodiment 3

[0031] In this embodiment, sludge is selected as the carbon source, and ferric nitrate is selected as the zero-valent iron precursor. Ferric nitrate was prepared into a 5mol / L iron-containing solution for later use. The preparation of the Fe / C composite material in this embodiment may comprise the following steps:

[0032] Step 1): Add 500 g of sludge into the iron-containing solution with a volume of 1 L and a concentration of 5 mol / L, shake and shake well. In order to fully mix the sludge with the ferric nitrate solution, ultrasound can be assisted for 30 minutes. At a water bath temperature of 40° C., magnetically stirred and mixed for 24 hours, and then ammonia water was used to control the pH value of the iron-containing solution added to the sludge to be 8.3. After adjusting the pH value, stir and heat in a water bath at 70°C until a gel is formed, then transfer to a vacuum oven at 105°C and heat until completely dry.

[0033] Step 2): The product obtained in step 1) ...

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Abstract

The invention belongs to the technical field of material chemistry, and discloses a Fe / C composite material. The Fe / C composite material is prepared by adopting a carbon-thermal reduction method through the following steps: 1) dissolving and preparing ferric salt into an iron-containing solution, adding a carbon source into the iron-containing solution, oscillating and shaking well, controlling the pH value of the iron-containing solution to be about 8.0, stirring and heating until gel is generated, then transferring into a vacuum drying oven for drying moisture; and 2) putting a product obtained from the step I into a tubular resistance furnace with nitrogen protection, carbonizing for 4 h under the condition of 500-1000 DEG C, cooling and grinding and then cleaning with deionized water, removing water-soluble components, then filtering and drying, milling into powder, thereby obtaining a zero-valent Fe / C-loading composition material. The invention further provides applications of the Fe / C composite material for fixing uranium in waste water as an adsorbent. According to the invention, the technical problem that agglomeration is easily generated when zero-valent iron is synthesized by adopting a traditional NaBH4 liquid phase reduction method. The Fe / C composite material has a high-efficiency immobilization effect on uranyl ions in the waste water, and can be used for treating the mining uranium-containing waste water pollution.

Description

technical field [0001] The invention belongs to the technical field of material chemistry and relates to Fe / C composite materials, in particular to a Fe / C composite material prepared by a carbothermal reduction method, and the Fe / C composite material used as an adsorbent for fixing uranium in waste water application. Background technique [0002] With the rapid development of nuclear energy and nuclear science and technology, the demand for uranium resources in human society has increased dramatically. However, the amount of uranium-containing radioactive waste produced in the process of uranium mining, nuclear fuel processing, nuclear power utilization and reprocessing is also gradually increasing. The cost of radioactive waste disposal has become an important financial burden for all countries, and the research on radioactive waste disposal has attracted more and more attention from relevant countries. [0003] As a kind of radioactive element, uranium is mainly soluble ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30G21F9/12
CPCB01J20/02B01J20/20B01J2220/42B01J2220/4806G21F9/12
Inventor 孔令军陈迪云朱玉婷宋刚常向阳
Owner GUANGZHOU UNIVERSITY
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