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Preparation method of coffee ground substrate active carbon

A technology for the preparation of activated carbon and coffee grounds, applied in chemical instruments and methods, inorganic chemistry, water/sludge/sewage treatment, etc., can solve problems such as low effective utilization rate

Active Publication Date: 2019-07-05
TANGSHAN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since 2012, the world produces up to 6 million tons of coffee grounds every year, most of which are directly landfilled or incinerated, and the effective utilization rate is extremely low

Method used

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  • Preparation method of coffee ground substrate active carbon
  • Preparation method of coffee ground substrate active carbon
  • Preparation method of coffee ground substrate active carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 coffee grounds matrix activated carbon preparation method 1

[0024] (a) Soak the coffee grounds in distilled water several times, dry them at 100°C, pass through an 80-mesh sieve for later use, and obtain dry coffee grounds;

[0025] (b) Put the dry coffee grounds into the container, add a phosphoric acid solution with a mass percentage concentration of 8%, and the volume of the phosphoric acid solution is 4 mL·g based on the mass of the dry coffee grounds -1 , after stirring, ultrasonically oscillate it in an ultrasonic cleaner for 3 hours, filter and wash the coffee grounds until neutral, and dry them at 100°C to obtain acid-treated coffee grounds;

[0026] (c) Put the acid-treated coffee grounds into a muffle furnace for activation, and control the heating rate at 8 °C min -1 , gradually raised the temperature to 580°C, kept it warm for 2 hours, cooled it down to room temperature naturally, took it out, washed it with distilled water until it was neutr...

Embodiment 2

[0027] Embodiment 2 coffee grounds matrix activated carbon preparation method 1

[0028] (a) Soak the coffee grounds in distilled water several times, dry them at 110°C, pass through a 100-mesh sieve for later use, and obtain dry coffee grounds;

[0029] (b) Put the dry coffee grounds into the container, add a phosphoric acid solution with a mass percentage concentration of 12%, and the volume of the phosphoric acid solution is 6 mL·g based on the mass of the dry coffee grounds -1 , after stirring, ultrasonically oscillate it in an ultrasonic cleaner for 4 hours, filter and wash the coffee grounds until neutral, and dry them at 100°C to obtain acid-treated coffee grounds;

[0030] (c) Put the acid-treated coffee grounds into a muffle furnace for activation, and control the heating rate at 12 °C min -1 , gradually raised the temperature to 620°C, kept warm for 1, cooled naturally to room temperature, took out, washed with distilled water until neutral, dried and sieved to obta...

Embodiment 3

[0031] Embodiment 3 coffee grounds matrix activated carbon preparation method

[0032] (a) Soak coffee grounds in distilled water several times, dry at 105°C, pass through a 90-mesh sieve for later use, and obtain dry coffee grounds;

[0033] (b) Put the dry coffee grounds into the container, add a phosphoric acid solution with a mass percentage concentration of 10%, and the volume of the phosphoric acid solution is 5 mL·g based on the mass of the dry coffee grounds -1 , after stirring, ultrasonically oscillate it in an ultrasonic cleaner for 3.5 hours, filter and wash the coffee grounds until neutral, and dry them at 105°C to obtain acid-treated coffee grounds;

[0034] (c) Put the acid-treated coffee grounds into a muffle furnace for activation, and control the heating rate at 10 °C min -1 , gradually raised the temperature to 600°C, kept it warm for 1.5h, cooled it down to room temperature naturally, took it out, washed it with distilled water until it was neutral, dried i...

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Abstract

The invention discloses a preparation method of coffee ground substrate active carbon. The method comprises the following steps that (a) coffee grounds are soaked in distilled water many times, and dried coffee grounds are obtained through drying and filtration; (b) the dried coffee grounds are put in a container, a phosphoric acid solution with the mass percent concentration of 8-12% is added, the using volume amount of the phosphoric acid solution is 4-6 mL-g-1 based on the mass of the dried coffee grounds, and after stirring, ultrasonic vibration lasts for 3-4 hours; after filtering, the coffee grounds are washed to be neutral and dried at 100-110 DEG C, and coffee grounds after acid treatment are obtained; (c) the coffee grounds after acid treatment are put in a muffle furnace for activation, the temperature increasing rate is controlled to 8-12 DEG C-min-1, the temperature is gradually increased to 580-620 DEG C, temperature preservation lasts for 1-2 hours, the coffee grounds arenaturally cooled to the indoor temperature, taken out and washed with distilled water to be neutral, and after drying and screening, the coffee ground substrate active carbon is obtained. According to the coffee ground substrate active carbon, the coffee grounds are taken as a raw material, the phosphoric acid is an activating agent, and the coffee ground substrate active carbon is prepared by utilizing a high-temperature pyrolysis self-activation method, and is large in specific surface area, high in adsorption capacity and capable of being used for treating waste water with Cr(VI), adsorbing Cr and preventing and treating heavy metal pollution.

Description

technical field [0001] The invention belongs to the technical field of adsorbents, in particular to the preparation and application of a high-efficiency coffee grounds-based activated carbon. Background technique [0002] Activated carbon is a functional adsorption material, which is usually a black solid composed of carbonized microcrystalline and amorphous carbon obtained by thermal decomposition and thermal condensation polymerization of carbon-containing raw materials by physical activation or chemical activation at high temperature. Compared with other adsorbents such as zeolite, bentonite, silica gel, etc., activated carbon has the advantages of developed pore structure, large specific surface area, rich functional groups on the carbon surface, and stable adsorption performance. It has been widely used in metallurgy, chemical industry, environmental protection, medicine and other industries. Adsorption and removal of heavy metal ions, dyes, and antibiotic pollutants. ...

Claims

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Application Information

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IPC IPC(8): C01B32/342C01B32/324B01J20/20B01J20/30C02F1/28C02F101/22
CPCC01B32/342C01B32/324B01J20/20C02F1/283C02F2101/22
Inventor 邵俊沈丽郝玉翠
Owner TANGSHAN COLLEGE
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