Method for preparing magnetic biochar

A biochar and magnetic technology, applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve the problems of small specific surface area pore size, unsustainable biochar adsorption capacity, and difficult to recycle, etc., to achieve application prospects broad effect

Inactive Publication Date: 2018-11-02
FOSHAN WANYANG BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem mainly solved by the present invention is that the specific surface area, pore volume and pore size of the original biochar are relatively small at present, the ability to hold ammonium nitrogen an

Method used

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  • Method for preparing magnetic biochar

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Example Embodiment

[0025] Example 1

[0026]Add 20g of ferric chloride hexahydrate into a beaker containing 150mL of ethylene glycol, stir until ferric chloride hexahydrate dissolves, add 30mL of sodium acetate solution with a mass fraction of 30% and 5g of polyethylene glycol into the beaker, and continue mixing Stir for 40 minutes to obtain a viscous liquid; transfer the viscous liquid to a hydrothermal reaction kettle, seal the hydrothermal reaction kettle, place the hydrothermal reaction kettle in an oven with a set temperature of 190°C, react for 8 hours, and put the magnet into the water In the thermal reaction kettle, the black powder is separated by adsorption, and the black powder is washed with absolute ethanol and deionized water for 4 times, and the washed black powder is placed in a vacuum drying oven with a set temperature of 60°C for drying. 6h, ferroferric oxide magnetic nanopowder was obtained; 10g of ferroferric oxide magnetic nanopowder was dispersed in 200mL of hydrochloric a...

Example Embodiment

[0027] Example 2

[0028] Add 23g of ferric chloride hexahydrate into a beaker containing 165mL of ethylene glycol, stir until ferric chloride hexahydrate dissolves, add 35mL of sodium acetate solution with a mass fraction of 30% and 5g of polyethylene glycol into the beaker, and continue mixing Stir for 45 minutes to obtain a viscous liquid; transfer the viscous liquid to a hydrothermal reaction kettle, seal the hydrothermal reaction kettle, place the hydrothermal reaction kettle in an oven with a set temperature of 195°C, react for 9 hours, and put the magnet into the water In the thermal reaction kettle, the black powder is separated by adsorption, and the black powder is washed with absolute ethanol and deionized water for 4 times, and the washed black powder is placed in a vacuum drying oven with a set temperature of 70°C for drying. 6h, obtain ferroferric oxide magnetic nanopowder; get 13g ferroferric oxide magnetic nanopowder and disperse in 275mL hydrochloric acid that...

Example Embodiment

[0029] Example 3

[0030] Add 25g of ferric chloride hexahydrate into a beaker containing 180mL of ethylene glycol, stir until ferric chloride hexahydrate dissolves, add 40mL of 30% sodium acetate solution and 6g of polyethylene glycol into the beaker, and continue mixing Stir for 50 minutes to obtain a viscous liquid; transfer the viscous liquid to a hydrothermal reaction kettle, seal the hydrothermal reaction kettle, place the hydrothermal reaction kettle in an oven with a set temperature of 200°C, react for 10 hours, and put the magnet into the water In the thermal reaction kettle, the black powder is separated by adsorption, and the black powder is washed with absolute ethanol and deionized water for 5 times, and the washed black powder is placed in a vacuum drying oven with a set temperature of 80°C for drying. 7h, obtain ferroferric oxide magnetic nanopowder; Get 15g of ferroferric oxide magnetic nanopowder and disperse in 250mL hydrochloric acid that mass fraction is 15...

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Abstract

The invention relates to the technical field of heavy metal ion adsorption and particularly relates to a method for preparing magnetic biochar. The method disclosed by the invention comprises the following steps: dissolving iron chloride hexahydrate into ethylene glycol, adding a sodium acetate solution and polyethylene glycol to obtain a viscous liquid, placing a magnet into the liquid to obtaina ferroferric oxide magnetic nano powder, washing and drying black filter residues, doping absolute ethyl alcohol, ammonium hydroxide and ethyl orthosilicate to obtain a mixed solution, dispersing themagnetic nano powder coated with single-layer silica, a poplar wood powder, biochar and other raw materials into acetone to react so as to obtain a dispersed suspension; mixing and drying the dispersed suspension and polyvinyl alcohol, grinding and screening, so as to obtain the magnetic biochar. The specific surface area of the magnetic nano powder is enlarged by utilizing the effects of cetyl trimethyl ammonium bromide, the adsorption rate of heavy metal ions is improved, the silica on the surface of the magnetic nano powder is capable of preventing corrosion by acid and alkali and attracting the heavy metal ions in an acidic environment along with directional migration of the magnetic nano powder, and the application prospects are wide.

Description

technical field [0001] The invention relates to the technical field of heavy metal ion adsorption, in particular to a preparation method of magnetic biochar. Background technique [0002] In recent years, soil heavy metal pollution has brought prominent ecological environment and food safety problems, and has attracted widespread attention. Heavy metals accumulate in the soil, causing soil degradation and lower crop yield and quality. Heavy metals cannot be biodegraded, can accumulate in plants, and enrich human and animal bodies through the food chain, posing a threat to human and animal health. [0003] Biochar refers to a kind of refractory, stable, highly aromatized, carbon-rich charcoal produced by pyrolysis of organic materials such as crop straws, woody materials, and poultry manure under complete or partial anoxic conditions. of solid matter. Common biochars include charcoal, bamboo charcoal, straw charcoal, rice husk charcoal, etc. Biochar has the characteristic...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/0288B01J20/046B01J20/06B01J20/12B01J20/20B01J20/22B01J20/261B01J20/28009C02F1/283C02F2101/20
Inventor 刘茂龙邓博陈帅
Owner FOSHAN WANYANG BIOLOGICAL TECH CO LTD
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