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Method for improving heavy metal adsorption performance of biochar

A technology for adsorbing heavy metals and biochar, applied in the field of environmental pollution control, can solve the problems of human health and ecological environment hazards, long-term toxicity, etc., and achieve the effects of improving utilization efficiency, improving adsorption effect, and facilitating transportation

Inactive Publication Date: 2016-11-16
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heavy metal ions will accumulate in organisms through the food chain, and their toxicity will exist for a long time, which is very likely to cause serious harm to human health and the ecological environment

Method used

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  • Method for improving heavy metal adsorption performance of biochar
  • Method for improving heavy metal adsorption performance of biochar
  • Method for improving heavy metal adsorption performance of biochar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take the stems and leaves of sun-dried water hyacinth and crack them for 210s under the working condition of microwave cracking furnace power of 1100w to obtain the required powdered biochar. Mix 0.2g powdered biochar, 0.15g phenolic resin and 0.1g ammonium bicarbonate evenly, and then add Stir after 20 drops of 75wt% alcohol. After stirring evenly, put the mixture into a molding mold and apply a molding pressure of 0.05MPa to shape it. Then take out the shaped biochar from the mold, and place it in a microwave cracking furnace with power 700w for activation treatment for 150s.

[0025] The prepared shaped activated carbon (such as figure 1 ) is used to adsorb lead ion solution with an initial concentration of 100mg / l, pH=3, place it on a shaking table with a rotation speed of 120r / min for 24h, take the lead solution after adsorption for lead ion concentration test, and the result is that the equilibrium concentration of lead ion solution is 0.02 mg / l, the removal amou...

Embodiment 2

[0027] Take the stems and leaves of sun-dried water hyacinth and crack them for 210s under the working condition of microwave cracking furnace power of 1100w to obtain the required powdered biochar. Mix 0.2g powdered biochar, 0.15g phenolic resin and 0.1g ammonium bicarbonate evenly, and then add Stir after 20 drops of 75wt% alcohol. After stirring evenly, put the mixture into a molding mold and apply a molding pressure of 0.05MPa. Then take out the shaped biochar from the mold and place it in a microwave cracking furnace with a power of 700w. Activation treatment 150s.

[0028] The prepared shaped activated carbon (such as figure 1 ) is used to adsorb lead ion solution with an initial concentration of 200mg / l, pH=3, place it on a shaking table with a rotation speed of 120r / min for 24h, take the lead solution after adsorption for lead ion concentration test, and the result is that the equilibrium concentration of lead ion solution is 0.13 mg / l, the removal amount is 99.935mg / ...

Embodiment 3

[0030] Take the stems and leaves of sun-dried water hyacinth and crack them for 210s under the working condition of microwave cracking furnace power of 1100w to obtain the required powdered biochar. Mix 0.2g powdered biochar, 0.15g phenolic resin and 0.1g ammonium bicarbonate evenly, and then add Stir after 20 drops of 75wt% alcohol. After stirring evenly, put the mixture into a molding mold and apply a molding pressure of 0.05MPa. Then take out the shaped biochar from the mold and place it in a microwave cracking furnace for activation with a power of 700w. Process 150s.

[0031] The prepared shaped activated carbon (such as figure 1 ) is used to adsorb lead ion solution with an initial concentration of 500mg / l, pH=3, placed on a shaking table with a rotation speed of 120r / min for 24 hours, and the lead solution after adsorption is taken for lead ion concentration test, and the result is that the equilibrium concentration of lead ion solution is 30.5 mg / l, the removal amount...

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Abstract

The invention discloses a method for improving heavy metal adsorption performance of biochar. The method comprises the steps that powdery biochar is obtained through microwave cracking of water hyacinth stems and leaves, a binder and a pore former are selected reasonably, the powdery biochar, the binder and the pore former are mixed to be uniform according to the mass ratio of 1:(0.5-1.5):(0.25-0.75), then the mixture is put in a forming mold, forming pressure is applied for forming, and finally formed biochar is put in a microwave cracking furnace for activation. The heavy metal adsorption effect of the prepared formed active carbon is remarkably improved compared with traditional powdery biochar, the removal rate is approximate to 100% when the initial concentration of a lead solution is low, and the method has the advantages that the manufacturing process is simple, efficient, low in cost and the like.

Description

technical field [0001] The invention relates to the field of environmental pollution control, in particular to a method for improving the performance of biochar for absorbing heavy metals. Background technique [0002] Due to the characteristics of strong adsorption capacity, stable chemical properties, large specific surface area, and heat, acid, and alkali resistance, biochar has been used as early as a hundred years ago. In 1785, Lowitz demonstrated that charcoal could decolorize certain liquids; ten years later, charcoal had its first industrial application in English sugar refineries. With the rise of the "industrial revolution" in the later period, the scope of application of biochar has become wider and wider, from the initial simple application of decolorization and adsorption to food processing, chemical industry, military chemical protection and other aspects. Most of the powdered biochar used in the early stage is difficult to separate, easy to lose, difficult to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J2220/4837C02F1/286C02F2101/20
Inventor 赵云苏建彬沈英
Owner FUZHOU UNIV
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