Biological carbon prepared form grapefruit skin, preparation method and application thereof

A technology of pomelo peel and biochar, which is applied in the field of agricultural chemistry, can solve the problems of being thrown away, or being dried, burned, wasting renewable resources, affecting the ecological environment, etc., to achieve large specific surface area, strong adsorption capacity, and reduce Effects of Environmental Pollution

Active Publication Date: 2016-10-12
HUNAN AGRICULTURAL UNIV
3 Cites 36 Cited by

AI-Extracted Technical Summary

Problems solved by technology

As a part of pomelo, pomelo peel is thrown away, dried or burned every time after eating pomelo, which is very easy to cause environmental p...
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Abstract

The invention discloses a preparation method of biological carbon by using grapefruit skin. The method is as below: drying and pulverizing grapefruit skin, and mixing the grapefruit skin with an aqueous solution of catalyst, and conducting a hydrothermal carbonization reaction; after the hydrothermal carbonization reaction, washing and drying to obtain the biological carbon. The temperature of the hydrothermal carbonization reaction is 160 DEG to 260 DEG C; the catalyst is at least one selected from phosphoric acid, sulfuric acid, hydrochloric acid, acetic acid, citric acid, acrylic acid, sodium polyacrylate, sodium polystyrene sulfonate, zinc chloride, and stannic chloride. In addition, the invention also comprises the biological carbon which is prepared by the method and the application of the biological carbon in the adsorption of heavy metals. The biological carbon material obtained by the invention has the advantages of microsphere particle shape, uniform particle size and high adsorption capacity, and can be applied to the field of adsorption and remediation of heavy metal pollutants or organic pollutants.

Application Domain

Other chemical processesWater contaminants +1

Technology Topic

Sodium polyacrylateAcrylic acid +15

Image

  • Biological carbon prepared form grapefruit skin, preparation method and application thereof
  • Biological carbon prepared form grapefruit skin, preparation method and application thereof
  • Biological carbon prepared form grapefruit skin, preparation method and application thereof

Examples

  • Experimental program(9)
  • Comparison scheme(2)

Example Embodiment

[0038] Example 1:
[0039] After the pomelo peel waste is pulverized, select 60 mesh particles, according to the ratio of 1g: 12ml, 5g of pomelo peel biomass and 60ml concentration of 10% phosphoric acid aqueous solution are stirred evenly, sealed in the autoclave, Under the condition that the heating rate of the electric furnace is 10-20°C/min, conduct hydrothermal carbonization at 180°C for 10 hours, wash with deionized water until neutral after natural cooling, filter with suction, dry at 70°C for 10 hours, and grind to obtain pomelo peel biochar material. The SEM image of the prepared biochar is shown in figure 1. The prepared biochar has a sheet structure with a thickness of only 300-500nm.

Example Embodiment

[0040] Example 2:
[0041] After the pomelo peel waste is pulverized, select 60 mesh particles, according to the ratio of 1g: 12ml, 5g of pomelo peel biomass and 60ml concentration of 20% phosphoric acid aqueous solution are stirred evenly, sealed in the autoclave, Under the condition that the heating rate of the electric furnace is 10-20°C/min, conduct hydrothermal carbonization at 180°C for 10 hours, wash with deionized water until neutral after natural cooling, filter with suction, dry at 70°C for 10 hours, and grind to obtain pomelo peel biochar material. The prepared biochar has a sheet-like and spherical mixed structure, and the thickness of the sheet-like structure product is only 200-500nm. The SEM image of the prepared biochar is shown in figure 2.

Example Embodiment

[0042] Example 3:
[0043] After the pomelo peel waste is pulverized, select 60 mesh particles, according to the ratio of 1g: 12ml, 5g of pomelo peel biomass and 60ml concentration of 30% phosphoric acid aqueous solution are stirred evenly, sealed in the autoclave, Under the condition that the heating rate of the electric furnace is 10-20°C/min, conduct hydrothermal carbonization at 180°C for 10 hours, wash with deionized water until neutral after natural cooling, filter with suction, dry at 70°C for 10 hours, and grind to obtain pomelo peel biochar material. The SEM image of the prepared biochar is shown in image 3. The prepared biochar has a sheet-like and spherical mixed structure, and the thickness of the sheet-like structure product is only 300-500nm.
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PUM

PropertyMeasurementUnit
Specific surface area687.0m²/g
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Classification and recommendation of technical efficacy words

  • Large specific surface area
  • Strong adsorption capacity
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