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Method for preparing magnetism biomass adsorbent and removing heavy metal

A biomass adsorbent, biomass technology, applied in the directions of alkali metal compounds, chemical instruments and methods, adsorbed water/sewage treatment, etc., can solve the problem of less magnetic modification, achieve no secondary pollution, convenient and controllable separation, The effect of a simple synthesis route

Active Publication Date: 2013-09-25
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetic modification of by-product biomass such as wood flour, fruit shells, and corn stalks is relatively rare.

Method used

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  • Method for preparing magnetism biomass adsorbent and removing heavy metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] After sieving the wood powder, wash it with deionized water to remove the dirt on the surface, and then dry it at 80°C for 12h. Weigh 10g of wood powder and add it to 500mL of 1% acetic acid solution and stir for 1h, then weigh 1g of chitosan powder and dissolve it in 500mL of 1% acetic acid solution and keep stirring for 1h. Then the above two solutions were mixed together and stirred rapidly for 30 minutes to form a stable suspension solution, and 1 g of the prepared magnetic Fe 3 o 4 The powder continued to stir for 3h. After the reaction, pour the above solution into 500mL 1mol / L NaOH solution, stir at 50°C for 5h, then use a magnet (3000-5000GS) to select the magnetic wood powder, and wash it with deionized water until neutral. Dry the obtained magnetic wood powder at 80°C for 24 hours for use.

[0022] Weigh 0.1g of magnetic wood powder adsorbent and add it to 50mL solution containing heavy metals Ni(II), Hg(II), Sr(II), Cr(VI) at a concentration of 5-50mg / L, s...

Embodiment 2

[0024] After sieving the wood powder, wash it with deionized water to remove the dirt on the surface, and then dry it at 80°C for 12h. Weigh 10g of wood powder and add it to 500mL of 1% acetic acid solution and stir for 1h, then weigh 1g of chitosan powder and dissolve it in 500mL of 1% acetic acid solution and keep stirring for 1h. Then the above two solutions were mixed together and stirred rapidly for 30 minutes to form a stable suspension solution, and 1 g of the prepared magnetic Fe 3 o 4 The powder continued to stir for 3h. After the reaction, pour the above solution into 500mL 1mol / L NaOH solution, stir at 50°C for 5h, then use a magnet (3000-5000GS) to select the magnetic wood powder, and wash it with deionized water until neutral. Dry the obtained magnetic wood powder at 80°C for 24 hours for use.

[0025] Weigh 0.2g of magnetic wood powder adsorbent and add it to 50mL solution containing heavy metal As(V) with a concentration of 1000μg / L, shake for 3h, and analyze...

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Abstract

The invention belongs to the technical field of water quality purification and heavy metal removal, and relates to a method for preparing a magnetism biomass adsorbent and removing heavy metal. The method comprises the following steps of: crushing and screening the biomass, cleaning with deionized water and drying; adding the dried biomass into acetic acid solution, stirring uniformly, dissolving chitosan with another acetic acid solution to prepare uniform chitosan acetic acid solution, blending the two solution to be uniform, then adding magnetic powder and stirring continuously; pouring the mixed solution obtained from reaction into alkali liquor for solidification; and selecting the low-cost magnetism adsorbent with a magnet, washing to be neutral and drying. The magnetism biomass adsorbent is proportionally added into the solution for removing heavy metal. The preparation method of the magnetism biomass adsorbent is simple to operate, short in process flow and environment-friendly and controllable in the adsorption process.

Description

technical field [0001] The invention belongs to the technical field of resource utilization and environment, and relates to the preparation of a magnetic biomass adsorbent and a method for removing heavy metals. Background technique [0002] According to the World Health Organization, 80% of human diseases are due to drinking polluted water. The survey results show that 5 million people in my country die every year due to diseases caused by drinking unhealthy water. The results of our country's water quality survey show that the pollution of heavy metals to the environment is on the rise. For example: Hg, Cd, Cr, As, Ni, etc. After heavy metals enter the ecosystem, they are distributed in various components of the aquatic ecosystem and have an impact on the ecosystem. Among them, the pollution of drinking water sources in China is very serious, and about 30% of them meet the drinking water standards. [0003] Adsorption is an effective method for removing pollutants in w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
Inventor 马伟程子洪王刃沙学龙宗盼盼徐军
Owner DALIAN UNIV OF TECH
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