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fe/c composite material and its application

A composite material and solution technology, applied in the field of material chemistry, can solve the problem of easy agglomeration of zero-valent iron, and achieve the effect of high-efficiency fixation and wide application prospects.

Active Publication Date: 2019-05-07
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 used as the carbon source, and ferrous sulfate is used as the zero-valent iron precursor. Prepare ferrous sulfate into a 5mol / L iron-containing solution for later use. The preparation of the Fe / C composite material in this embodiment may include the following steps:

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

[0025] Step 2): Place the product obt...

Embodiment 2

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

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

[0029] Step 2): Place the product obtained in step 1) in a ceramic ark, and put it into a quartz tube electric furnace with nitrogen protection that can provide a ...

Embodiment 3

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

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

[0033] Step 2): Place the product obtaine...

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PUM

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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 is used as an adsorbent for fixing uranium in wastewater application. Background technique [0002] With the rapid development of nuclear energy and nuclear science and technology, human society's demand for uranium resources has increased dramatically. However, the amount of uranium-containing radioactive waste generated in the process of uranium mining, nuclear fuel processing, nuclear power utilization and post-processing is also gradually increasing. The disposal cost of radioactive waste has become an important financial burden for all countries, and the research on radioactive waste disposal has received more and more attention from relevant countries. [0003] As a kind of radioactive element, uranium is mainly used as solubl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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