Carbon and ferroferric oxide mesoporous compound material, preparation thereof and application thereof in environmental sewage treatment

A technology of ferric tetroxide and composite materials, which is applied to carbon and ferric tetroxide mesoporous composite materials and their preparation and application in environmental sewage treatment, can solve problems such as complicated preparation process, and achieve high product purity, High productivity and low energy consumption

Inactive Publication Date: 2011-10-26
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of these magnetic materials is very complicated, and some toxic organic reagents are often used.

Method used

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  • Carbon and ferroferric oxide mesoporous compound material, preparation thereof and application thereof in environmental sewage treatment
  • Carbon and ferroferric oxide mesoporous compound material, preparation thereof and application thereof in environmental sewage treatment
  • Carbon and ferroferric oxide mesoporous compound material, preparation thereof and application thereof in environmental sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of Carbon and Fe3O4 Composite

[0031] The preparation steps are as follows:

[0032] 1), adding 3.0 grams of chitosan to 100 mL of acetic acid aqueous solution with a volume concentration of 3%, forming a homogeneous solution under magnetic stirring, adding 3.6 milliliters of 0.5 mol / L ferric nitrate solution to chitosan under magnetic stirring In the acetic acid solution of sugar, continue magnetic stirring to mix into a homogeneous solution.

[0033] 2), using a 2 ml syringe, take the above solution and add it dropwise to a petri dish containing a 3mol / L sodium hydroxide solution at a height of about 6 cm. The volume of the sodium hydroxide solution is 2% of the volume of the petri dish / 3 or more, the sodium hydroxide solution is greatly excessive, and a spherical product is formed immediately.

[0034] 3), filter the obtained product, and wash it repeatedly with distilled water several times to remove the residual sodium hydroxide on the surface of th...

Embodiment 2

[0036] Carbon and ferroferric oxide composite material adsorption experiment of lead in sewage prepared in embodiment 1

[0037] 1. Weigh 100 mg of the composite adsorbent obtained;

[0038] 2. Weigh 1.5986 grams of lead nitrate solid and dissolve it in deionized water to prepare a concentration of 1000 mg L -1 Standard solution of lead:

[0039] 3. Pipette the standard solution in step 2 and dilute to 2.0, 4.0, 6.0, 8.0, 10.0 and 20.0mg L respectively -1 100 ml each of the simulated sewage:

[0040] 4. The experiment of adsorbing lead in sewage is carried out at room temperature without adjusting the pH value of sewage. The concentration of carbon and ferroferric oxide composite material is 1.0g L -1 After the adsorbent is evenly dispersed in the sewage, start timing. The whole adsorption process is kept mechanically stirred, and samples are taken at different times. The sampled liquid is filtered with a filter membrane with a diameter of 0.45 μm. After filtering out the a...

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Abstract

The invention discloses a carbon and ferroferric oxide mesoporous compound material, a preparation thereof and an application thereof in environmental sewage treatment. The carbon and ferroferric oxide mesoporous compound material is acquired by taking chitosan as a carbon source, taking ferric nitrate nonahydrate, ethylic acid and sodium hydroxide as raw materials, and performing a micro-channelauxiliary method at room temperature. The carbon and ferroferric oxide mesoporous compound material prepared by using the method has a mesoporous structure and has a bigger specific surface area. In the material, the mass ratio of carbon to ferroferric oxide is 2:1. Because the material is magnetic, the material can be conveniently and quickly separated under the action of an external magnetic field. The prepared carbon and ferroferric oxide mesoporous compound material can absorb the heavy metal lead ions from the sewage within a short period of time, without generating pollutants similar toflocculating agents. The carbon and ferroferric oxide mesoporous compound material is simple in process, is low in cost, is environmentally-friendly and meets the actual production requirement.

Description

technical field [0001] The invention relates to a mesoporous composite material of carbon and ferroferric oxide, its preparation and its application in treating environmental sewage. Background technique [0002] The heavy metal lead is one of the most toxic metallic elements, even at low concentrations. It not only affects the central nervous system, kidneys, liver and gastrointestinal system, but may also directly or indirectly cause some diseases, such as anemia, encephalopathy, hepatitis and nephrotic syndrome. Due to the increasing mining, smelting, processing and commercial manufacturing activities of heavy metals, such as: plastics, batteries, electronics and wastewater discharged from smelting industries, lead pollution in water bodies is caused. It is estimated that from 1970 to 1979, the total amount of lead discharged directly into water bodies due to human activities in the world was about 16,000 tons; the total amount of lead discharged into the atmosphere was ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 龚静鸣王小庆
Owner HUAZHONG NORMAL UNIV
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