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Preparation method and use of carbon coated magnetic adsorption material
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A magnetic adsorption material and carbon-coated technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve extensive restrictions, cumbersome, and complex problems, and achieve cost reduction, structural stability, and low cost effect
Inactive Publication Date: 2015-02-04
HEFEI UNIV OF TECH
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However, because these adsorbents also have different degrees of deficiencies in terms of stability, adsorption capacity, and adsorption selectivity, especially their complicated and cumbersome separation, recovery and other operating processes, their wide application is limited to a certain extent.
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Embodiment 1
[0027] Preparation of carbon-coated magnetic adsorption materials
[0028] The preparation steps are as follows:
[0029] 1), 3.0g of glucose and 1.0g of nickel nitrate were added to 80mL of aqueous ethanol with a volume ratio of 1:1, and a homogeneous solution was formed under magnetic stirring;
[0030] 2) The homogeneous solution obtained in step 1) was heated to 105° C. and dried to obtain a solid mixture, and then fully ground in a mortar.
[0031] 3) Calcining the ground solid mixture in step 2) in a tube furnace at 700° C. under an argon atmosphere for 2 hours to obtain a magnetic adsorption material with a carbon-coated structure.
Embodiment 2
[0033] Experiments on the adsorption of lead ions and copper ions in sewage by the carbon-coated magnetic adsorption material prepared in Example 1
[0034] 1), weigh 3.197g lead nitrate Pb (NO 3 ) 2 Dissolve the solid in a 1000mL volumetric flask with distilled water to prepare a concentration of 2g L -1 of Pb 2+ standard solution:
[0035] Weigh 7.6039g copper nitrate trihydrate Cu(NO 3 ) 2 ·3H 2 Dissolve the O solid in a 1000mL volumetric flask with distilled water to prepare a concentration of 2g L -1 Cu 2+ standard solution.
[0036] 2), pipette the standard solution prepared in step 1 and dilute to 20.0mg L respectively -1 Each 500mL of simulated sewage is used as a spare:
[0037] 3), lead ion and copper ion experiment in the adsorption sewage, experiment is carried out under the room temperature condition, does not need to adjust the pH value of sewage, the concentration of adding the magnetic adsorption material prepared by embodiment 1 is 0.8g L -1 After t...
Embodiment 3
[0039] Preparation of carbon-coated magnetic adsorption materials
[0040] The preparation steps are as follows:
[0041] 1), 5.0g of citric acid and 1.0g of nickel nitrate were added to 80mL of aqueous ethanol with a volume ratio of 1:3, and a homogeneous solution was formed under magnetic stirring;
[0042] 2) The homogeneous solution obtained in step 1) was heated to 105° C. and dried to obtain a solid mixture, and then fully ground in a mortar.
[0043] 3) Calcining the ground solid mixture in step 2) in a tube furnace at 600° C. under an argon atmosphere for 2 hours to obtain a magnetic adsorption material with a carbon-coated structure.
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Abstract
The invention discloses a preparation method of a carbon coated magnetic adsorption material. The preparation method which adopts a carbon source citric acid and nickel nitrate as raw materials comprises the following steps: dissolving the nickel nitrate and the carbon source in an aqueous ethanol solution at room temperature, wherein the mass ratio of the nickel nitrate to the carbon source is 1:3-10, and the volume ratio of ethanol to water of the aqueous ethanol solution is 1:1-5; uniformly stirring and mixing the solution; evaporating a solvent to obtain a solid mixture; grinding the mixture; and carbonizing through calcining the mixture in an inert gas environment to obtain the magnetic adsorption material having a carbon coating structure. The magnetic adsorption material prepared through the method has the advantages of carbon coating structure, uniform particle dimension distribution, large specific surface area, and realization of the rapid adsorption of pollutive heavy metal ions in sewage within a short period of time. Simultaneously the adsorption material has a magnetic property, so the adsorption material can realize quick separation and recovery under the action of an external magnetic field without the generation of secondary pollution. The method has the advantages of simple and safe operation, low cost, no environmental pollution, and according with practical production needs.
Description
1. Technical field [0001] The invention relates to a preparation method of a functional material. Specifically, it is a preparation method of a carbon-coated magnetic adsorption material and the application of the adsorption material in treating heavy metal ions polluted in sewage. 2. Background technology [0002] Due to the increasing mining, smelting, processing and commercial manufacturing activities of heavy metals, the pollution of heavy metals in water has increased, which has caused certain harm to the ecological environment and human health. In addition, in chemical industry, electroplating, manufacturing and other industries, waste water containing precious metals such as gold and silver will be produced. With the continuous improvement of living standards, people pay more and more attention to the environment, sanitation and food safety issues. Therefore, selective removal, recovery, and reuse of certain precious metals are highly desirable from a health and eco...
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