Low-temperature plasma modified biochar adsorption material as well as preparation method and application thereof

A low-temperature plasma and adsorption material technology, which is applied in the field of environmental governance and environmental energy, can solve the problems of single species of biochar surface groups, dangerous modification effects, and uneven structure, so as to enhance market competitiveness and adsorb active sites. More points, the effect of improving the pore structure

Inactive Publication Date: 2018-12-21
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a common adsorbent, biochar is rich in raw materials. Its adsorption is mainly based on the physical adsorption of its large specific surface area. its development in various fields
The common

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1:

[0030] 1) Preparation of pumpkin vine-based biochar: Wash and dry the pumpkin vine, mix it with 5mol / L KOH, wash and dry it after ultrasonication for 40min, put it in a tube furnace under the protection of argon, and heat it up at a rate of 5°C / min Heating rate to 800°C, keeping it for 1 hour, cooling to room temperature naturally, grinding through a 150-mesh stainless steel sieve, washing with ultra-clean water and drying;

[0031] 2) Preparation of low-temperature plasma-modified biochar: Take 1 g of the above-mentioned biochar in a low-temperature plasma reaction chamber, evacuate until the pressure in the chamber is stable, introduce air, and adjust the gas flow rate to 3.5-3.7 in the reaction chamber. Pa, stable for 8-10 minutes, discharge treatment for 30 minutes by glow discharge plasma induced by radio frequency power supply; after the treatment is completed, add acrylic acid and vinylphosphonic acid with a mass ratio of 1:1 and 25ml of ultra-clean ...

Example Embodiment

[0034] Example 2:

[0035] 1) Preparation of pumpkin vine-based biochar: Wash and dry the pumpkin vine, mix it with 5mol / L KOH, wash and dry it after ultrasonication for 40min, put it in a tube furnace under the protection of argon, and heat it up at a rate of 5°C / min Heating rate to 800°C, keeping it for 1 hour, cooling to room temperature naturally, grinding through a 150-mesh stainless steel sieve, washing with ultra-clean water and drying;

[0036] 2) Preparation of low-temperature plasma-modified biochar: Take 1 g of the above-mentioned biochar in a low-temperature plasma reaction chamber, evacuate until the pressure in the chamber is stable, introduce air, and adjust the gas flow rate to 3.5-3.7 in the reaction chamber. Pa, stabilized for 8-10min, discharge treatment for 30min by glow discharge plasma induced by radio frequency power supply; after the treatment is completed, add 1.5g of acrylic acid and 25ml of ultra-clean water, reflux at 80°C for 2h, after the reaction...

Example Embodiment

[0039] Example 3:

[0040] 1) Preparation of pumpkin vine-based biochar: Wash and dry the pumpkin vine, mix it with 5mol / L KOH, wash and dry it after ultrasonication for 40min, put it in a tube furnace under the protection of argon, and heat it up at a rate of 5°C / min Heat at a rate of 800°C, keep for 1 hour, then cool to room temperature naturally, grind through a 150-mesh stainless steel sieve, wash and dry with ultra-clean water.

[0041] 2) Preparation of low-temperature plasma-modified biochar: Take 1 g of the above-mentioned biochar in a low-temperature plasma reaction chamber, evacuate until the pressure in the chamber is stable, introduce air, and adjust the gas flow rate to 3.5-3.7 in the reaction chamber. Pa, stabilized for 8-10min, discharge treatment for 30min by the glow discharge plasma induced by radio frequency power supply; after the treatment is completed, add 1.5g of vinylphosphonic acid and 25ml of ultra-clean water, reflux and heat at 80°C for 2h, and wait...

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Abstract

The invention relates to a low-temperature plasma modified biochar adsorption material as well as a preparation method and application thereof, and belongs to an environmental control and environmental energy technology. The low-temperature plasma modified biochar adsorption material is used for treating wastewater, waste gas and spent fuel and extracting nuclear fuel in seawater, and the like. The modified biochar obtained has the advantages of higher specific surface area and characteristic functional groups, more adsorption active sites, stable physical and chemical properties of the material, high adsorption efficiency and excellent adsorption capacity; the modified biochar is used for removing radionuclides, heavy metal ions, organic matters and the like in the wastewater and the exhaust gas, extracting nuclear fuel from the spent fuel and the seawater, and the like. The preparation method of the modified biochar adsorption material disclosed by the invention has the advantages ofsimplicity and convenience, short process flow, easiness in realizing automatic control, cleanness, no pollution, higher industrial application value and facilitation of large-scale production.

Description

technical field [0001] The invention relates to a low-temperature plasma modified biochar adsorption material and its preparation method and application, which are used for the removal of environmental pollutants such as radionuclides, heavy metal ions and organic matter in waste water and waste gas, as well as the extraction of spent fuel and nuclear fuel in seawater etc., which belong to environmental governance and environmental energy technology. Background technique [0002] With the advancement of social industrialization, environmental governance and energy cleanliness and sustainability have increasingly become issues of common concern to the world and all mankind, and are also important issues for social and economic development. Chemical industry, printing and dyeing, metal smelting and nuclear fuel cycle process produce a large amount of heavy metal ions, organic matter and radionuclides. If these waste water and waste gas are discharged without treatment or if th...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/26B01J20/30C02F1/28G21F9/02G21F9/12G21F9/20B01D53/02C02F101/20C02F101/30
CPCB01D53/02B01J20/20B01J20/22B01J20/26B01J20/3078B01J2220/485B01J2220/4875C02F1/283C02F1/285C02F2101/20C02F2101/30G21F9/02G21F9/12G21F9/20
Inventor 霍志鹏易锦馨李家星刘丰云
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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