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A kind of preparation method of cornstarch activated carbon

A corn starch and activated carbon technology, applied in chemical instruments and methods, polluted groundwater/leachate treatment, water/sludge/sewage treatment, etc. Complexity and other problems, to achieve the effect of efficient adsorption performance and simple preparation process

Active Publication Date: 2022-03-29
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The surface modification of activated carbon usually involves mixing the activated carbon to be modified with chemical reagents and auxiliary reagents with specific functional groups and loading them in a hydrothermal environment. The entire modification process not only consumes a large amount of chemical reagents but also easily causes environmental pollution; meanwhile, activated carbon The separation of preparation and modification process makes the preparation process of activated carbon products complicated and the preparation cycle is significantly prolonged

Method used

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  • A kind of preparation method of cornstarch activated carbon
  • A kind of preparation method of cornstarch activated carbon
  • A kind of preparation method of cornstarch activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Effect of concentration of sodium hydroxide aqueous solution on adsorption performance of prepared corn starch activated carbon

[0018] Preparation of cornstarch activated carbon: as figure 1 As shown, respectively prepare 0.25, 0.35, 0.45, 0.5, 1, 1.5, 1.55, 1.65, 1.75mol / L sodium hydroxide aqueous solution, according to the solid-liquid ratio of cornstarch and sodium hydroxide aqueous solution 2:100 (g:mL) Add cornstarch into sodium hydroxide aqueous solution, stir evenly, and let it stand for 0.5 hours to obtain starch slurry. Centrifuge the starch slurry, pour off the liquid part, and dry the solid part at 50°C to obtain alkali-stimulated starch; Shocked starch was irradiated with low-temperature plasma for 1 hour to obtain corn starch activated carbon, wherein the action voltage of low-temperature plasma irradiation was 10kV, and the action atmosphere was a mixed gas of hydrogen sulfide, ammonia, and argon. The volume ratio is 4:2:100.

[0019] Adsorption test: ...

Embodiment 2

[0033] Effect of low-temperature plasma irradiation on the adsorption performance of prepared corn starch activated carbon

[0034]Preparation of corn starch activated carbon: prepare 1.0mol / L sodium hydroxide aqueous solution, add corn starch to sodium hydroxide aqueous solution according to the solid-to-liquid ratio of corn starch and sodium hydroxide aqueous solution 7:100 (g:mL), mix, stir evenly, Stand for 1 hour to obtain starch slurry, centrifuge the starch slurry, discard the liquid part, dry the solid part at 100°C to obtain alkali-stimulated starch; irradiate the alkali-stimulated starch with low-temperature plasma for 2 hours to obtain corn Starch activated carbon, in which the action voltages of low-temperature plasma irradiation are 5kV, 7kV, 9kV, 10kV, 30kV, 50kV, 52kV, 55kV, and 60kV, and the action atmosphere is a mixed gas of hydrogen sulfide, ammonia, and argon. , ammonia, argon volume ratio is 8:3:100.

[0035] Adsorption test, COD concentration detection a...

Embodiment 3

[0040] Influence of the volume ratio of hydrogen sulfide, ammonia and argon in the mixed gas on the adsorption performance of the prepared corn starch activated carbon

[0041] Preparation of cornstarch activated carbon: prepare 1.5mol / L sodium hydroxide aqueous solution, add cornstarch to sodium hydroxide aqueous solution according to the solid-to-liquid ratio of cornstarch and sodium hydroxide aqueous solution 12:100g (g:mL), mix, stir evenly, Stand for 1.5 hours to obtain starch slurry, centrifuge the starch slurry, pour off the liquid part, dry the solid part at 150°C to obtain alkali-stimulated starch; irradiate the alkali-stimulated starch with low-temperature plasma for 3 hours to obtain corn Starch activated carbon, in which the action voltage of low-temperature plasma irradiation is 50kV, and the action atmosphere is a mixed gas of hydrogen sulfide, ammonia, and argon. The volume ratios of hydrogen sulfide, ammonia, and argon in the mixed gas are 1:2:100, 2 :2:100, 3:...

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Abstract

The invention discloses a preparation method of cornstarch activated carbon, which comprises the following steps: (1) adding cornstarch into an aqueous solution of sodium hydroxide, standing to obtain starch slurry, centrifuging the starch slurry, drying the solid part, and obtaining alkali activated carbon. starch; (2) irradiating alkali-stimulated starch with low-temperature plasma to obtain cornstarch activated carbon. The invention can prepare activated carbon without high-temperature treatment, which solves the problems of decomposition of organic biomass and generation of harmful tail gas caused by traditional high-temperature treatment; it can simultaneously realize starch carbonization and surface modification of activated carbon, making the preparation process simple and easy to modify The process does not require additional chemical reagents containing sulfhydryl and amine groups; activated carbon has high adsorption performance and can remove 96% of ammonia nitrogen, 99% of COD, 98% of total phosphorus and 99% of lead in landfill leachate.

Description

technical field [0001] The invention relates to a preparation method of activated carbon, in particular to a preparation method of cornstarch activated carbon. Background technique [0002] Activated carbon is a commonly used adsorption material with a well-developed pore structure and strong adsorption to organic or inorganic pollutants in waste liquid. Its adsorption performance depends on many factors, including the choice of precursors, surface modification nature, environment, etc. As energy issues and environmental issues become increasingly prominent, the activated carbon production industry is actively seeking expansion and innovation in the selection of precursor materials and preparation processes. [0003] With the depletion of traditional fossil energy and environmental degradation becoming increasingly prominent, the use of environmentally friendly biomass to prepare various carbon materials that meet people's production needs can not only reduce production cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/318C01B32/348C02F1/28C02F103/06C02F101/16C02F101/30C02F101/20
CPCC01B32/318C01B32/348C02F1/283C02F2103/06C02F2101/16C02F2101/30C02F2101/20C02F2101/105
Inventor 黄涛邓锦涛苏怡宇戴宇星刘一睿宋东平金俊勋刘龙飞周璐璐
Owner CHANGSHU INSTITUTE OF TECHNOLOGY