Modified magnesia heavy metal removal agent and preparation method of same

A technology for removing agents and heavy metals, applied in alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of small manganese dioxide particles, limited use range, difficult separation, etc., to achieve Improve the adsorption type, increase the adsorption strength, and strengthen the effect of flocculation and precipitation

Inactive Publication Date: 2018-04-06
安徽铭能保温科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, manganese dioxide particles are small and difficult to separate, which limits its application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] A modified magnesia heavy metal remover, prepared by the following method:

[0020] (1) Mix calcium carbide furnace exhaust dust with 5% nitric acid solution at a solid-to-liquid ratio of 1:8g / mL, then raise the temperature to 55°C, stir and acidify for 50 minutes, collect the filter residue through filtration, and wash the filter residue with clean water until neutral , sent to a dryer to dry until the water content of the filter residue is less than 1%, and crushed until the particle size does not exceed 80 μm for later use;

[0021] (2) Add sodium alginate and chitosan to water to prepare a polysaccharide mixed solution with a final concentration of 5% sodium alginate and 0.5% chitosan, heat up to 40°C to fully dissolve, and then let stand until the solution has no bubbles before use;

[0022] (3) Put the magnesia into a high-temperature furnace, bake it at 500°C for 60 minutes, take it out after cooling, crush it through a 30-mesh sieve, put it into clean water and ...

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Abstract

The invention discloses a modified magnesia heavy metal removal agent and a preparation method of same. The heavy metal removal agent is produced from calcium carbide furnace tail gas dust, sodium alginate, chitosan, magnesia, tetraethoxysilane, and Fe3O4 powder. In the invention, the modified magnesia is coated with mixture of the industrial waste, calcium carbide furnace tail gas dust, and polysaccharides in an impregnation manner, so that combination stability with the modified magnesia is improved due to the low density and high fineness of the dust and high viscosity of the polysaccharides. Defects of poor mechanical strength caused by single application of the polysaccharides for coating are solved. The modified magnesia can increase adsorption type and strength of heavy metals. Theheavy metal removal agent is easy to prepare, employs easy-to-obtain raw materials, is environment-friendly and is free of secondary pollution. The heavy metal removal agent has excellent heavy metalremoval effect and is suitable for treatment on heavy metal pollution in different types.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a modified magnesia heavy metal removing agent and a preparation method thereof. Background technique [0002] The environmental pollution caused by industrial development has been increasing year by year. Among them, heavy metal pollution has the characteristics of long residual time, strong accumulation, difficult to degrade, difficult to be found and recovered after pollution, and easy to transfer and enrich along the food chain. Heavy metal pollutants can be enriched hundreds of times under the biomagnification of the food chain. Although the heavy metal content of some food raw materials may not exceed the standard, the necessary processing procedures such as concentration in the processing process may cause the heavy metal in the product to exceed the standard. focus on. [0003] The traditional heavy metal industrial treatment methods mainly include chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04B01J20/28B01J20/30C02F1/28C02F1/52C02F101/20
CPCB01J20/04B01J20/28009B01J20/28057C02F1/281C02F1/5236C02F2101/20
Inventor 杨华亮
Owner 安徽铭能保温科技有限公司
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