Method for preparing biological activated carbon from waste maidenhair tree leaves and folium ginkgo herb residue

A biological activated carbon, ginkgo tree technology, applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve problems such as perishability, achieve the effects of developed pores, solve the shortage of carbonaceous raw materials, and good adsorption performance

Inactive Publication Date: 2016-02-24
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the remaining ginkgo leaf residues after extracting the active ingredients are gener

Method used

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  • Method for preparing biological activated carbon from waste maidenhair tree leaves and folium ginkgo herb residue
  • Method for preparing biological activated carbon from waste maidenhair tree leaves and folium ginkgo herb residue
  • Method for preparing biological activated carbon from waste maidenhair tree leaves and folium ginkgo herb residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The collected natural fallen leaves of the ginkgo tree are firstly washed with water for 5 times until the water quality becomes clear, then washed with distilled water, dried and crushed to obtain the ginkgo leaf powder. Take 10 g of ginkgo leaf powder, add 100 mL of 95% ethanol solution, soak for 12 hours, filter, dry, pulverize, and pass through a 300-mesh sieve to obtain ginkgo leaf residue powder.

[0036]Weigh 10g of ginkgo leaf residue powder, dip it in 100mL potassium hydroxide solution (0.1~0.5g / mL) for 2h, put it into a crucible, put it in a muffle furnace, and raise the temperature to 600°C (the heating rate is 10°C / min ), carbonized for 1 h, and cooled to room temperature; first washed with 300 mL of hydrochloric acid solution (1-3 mol / L), then washed with distilled water until neutral, dried and ground to obtain the discarded ginkgo leaf residue bioactivated carbon material.

[0037] The biological activated carbon material has a decolorization rate of 97.6...

Embodiment 2

[0039] The collected natural fallen leaves of the ginkgo tree are firstly washed with water for 3 times until the water quality becomes clear, then washed with distilled water, dried and pulverized to obtain the ginkgo leaf powder. Take 20g of ginkgo leaf powder, add 200mL of 95% ethanol solution, soak for 12h, filter, dry, pulverize, and pass through a 300-mesh sieve to obtain ginkgo leaf residue powder.

[0040] Weigh 20g of ginkgo leaf residue powder, soak it with 200mL potassium hydroxide solution (0.1~0.5g / mL) for 12h, put it into a crucible, place it in a muffle furnace, and raise the temperature to 700°C (the heating rate is 10°C / min ), carbonized for 3 hours, and cooled to room temperature; first washed with 300mL hydrochloric acid solution (1~3mol / L), then washed with distilled water until neutral, and dried to obtain the discarded ginkgo leaf residue bioactivated carbon material.

[0041] The decolorization rate of biological activated carbon material for simulated w...

Embodiment 3

[0043] Wash the collected ginkgo leaf dregs (residue after extracting small molecule active ingredients from ginkgo leaves) with water until the water quality becomes clear, then wash twice with distilled water, dry, pulverize, and pass through a 300-mesh sieve to obtain ginkgo leaf dregs powder .

[0044] Weigh 20g of ginkgo biloba powder, soak it with 200mL potassium hydroxide solution (0.1~0.5g / mL) for 8h, put it into a crucible, put it in a muffle furnace, and raise the temperature to 500°C (the heating rate is 10°C / mL) min), carbonized for 2 hours, and cooled to room temperature; first washed with 300mL hydrochloric acid solution (1~3mol / L), then washed with distilled water until neutral, dried and ground to obtain bioactive carbon material of ginkgo biloba leaves.

[0045] The biological activated carbon material has a decolorization rate of 99.3% for simulated wastewater containing methylene blue, and an adsorption capacity of 595.8mg / g; a removal rate of 96.5% for simu...

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Abstract

The invention discloses a method for preparing biological activated carbon from waste maidenhair tree leaves and folium ginkgo herb residue. The method comprises the following steps: washing the maidenhair tree leaves or the folium ginkgo herb residue with water for several times till the washed water is clear, so as to obtain materials I; washing the materials I with distilled water, so as to obtain materials II; mixing the materials II with an activating agent solution; carrying out impregnating for 2 to 24 hours at the room temperature; putting into a muffle furnace; heating to 300 to 800 DEG C; carbonizing for 0.5 to 3 hours; cooling to the room temperature; washing with a hydrochloric acid solution; washing with distilled water to obtain a neutral semi-product; drying the semi-product; grinding the dried semi-product to obtain the biological activated carbon. The method has the advantages that the preparation technology is simple, clean and environment-friendly; the cost is low; not only is waste changed into valuable, but also the obtained biological activated carbon is uniform in texture, large in pore space, relatively large in specific surface area, and excellent in capability of adsorbing organic pollutants (such as methylene blue and phenol) and heavy metal ions (Cu<2+>), and can be applied to the technical field of industrial wastewater treatment.

Description

technical field [0001] The invention relates to the preparation of biological activated carbon, in particular to a method for preparing biological activated carbon by using discarded ginkgo leaves and leaves and medicinal residues, and belongs to the technical field of adsorption materials. Background technique [0002] Activated carbon, also known as activated carbon black, is a porous carbon material with excellent performance. It has a developed pore structure, a large specific surface area, and good acid and alkali resistance. It plays an important role in water purification, separation, catalyst carrier, super capacitor and other fields. Huge effect. However, traditional activated carbon generally uses wood, coal and heavy petroleum as raw materials, and the cost is relatively high. In recent years, as the country has banned logging of natural forests, the source of wood has shrunk, so the raw materials for preparing activated carbon have also been greatly restricted. ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/38C02F101/34C02F101/20
Inventor 何玉凤刘洁逯婷君王荣民
Owner NORTHWEST NORMAL UNIVERSITY
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