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Method for preparing active charcoal of smartweed stalk

A technology of activated carbon and polygonum rubrum, applied in the field of activated carbon, can solve the problems of easy pollution of the environment and lack of raw materials, etc., and achieve the effect of sufficient and easy raw materials, easy acquisition of raw materials, green and non-toxic carbon content

Inactive Publication Date: 2009-07-22
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the lack of raw materials and easy pollution of the environment in the prior art, the invention provides a method for preparing activated carbon from Polygonum rubrum straw, the quality of the obtained activated carbon is stable, wetland plants are fully utilized, the raw materials are easy to obtain, and the manufacturing process is simple, economical and efficient. Environmental friendly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the preparation method of Polygonum rubrum stalk activated carbon, the steps are as follows:

[0023] Wash the Polygonum stalks with water to remove soil and other impurities; then dry them at a temperature of 105°C. The dried stalks are pulverized to 90 mesh with a pulverizer, and the Polygonum stalk powder and the phosphoric acid with a volume fraction of 50% are mixed and soaked in a volume of 1:2, and the soaking time is 6 hours; Straw powder is heated up to 400°C at a heating rate of 5°C / min in a muffle furnace, and carbonized and activated at this temperature for 110 minutes to obtain activated carbon. Wash the activated carbon with water to recover phosphoric acid; then wash the activated carbon with water to pH=5, drain Dry and dry at 105°C.

Embodiment 2

[0024] Embodiment 2: the preparation method of Polygonum rubrum stalk activated carbon, the steps are as follows:

[0025] Wash the Polygonum stalks with water to remove soil and other impurities; then place them at 25°C to dry. The dried stalks are pulverized to 100 mesh with a pulverizer, the Polygonum stalk powder and the phosphoric acid with a volume fraction of 65% are mixed and soaked in a volume of 1:3, and the soaking time is 3 hours; Under the condition that the power of microwave oven is 1500W, microwave radiation is carried out with nitrogen as protective gas, carbonization and activation are carried out by radiation for 10 minutes, and the activated carbon is obtained, and the activated carbon is washed with water to recover phosphoric acid; then the activated carbon is washed with water to pH = 6, drained , and dried at 90°C.

Embodiment 3

[0026] Embodiment 3: the preparation method of Polygonum rubrum stalk activated carbon, the steps are as follows:

[0027] Wash the Polygonum stalks with water to remove soil and other impurities; then place them at 35°C to dry. The dried stalks are pulverized to 95 mesh with a pulverizer, the Polygonum stalk powder and the phosphoric acid with a volume fraction of 60% are mixed and soaked in a volume of 1:4, and the soaking time is 5 hours; Straw powder is heated up to 550°C at a heating rate of 3°C / min in a muffle furnace, and carbonized and activated at this temperature for 90 minutes to obtain activated carbon. Wash the activated carbon with water to recover phosphoric acid; then wash the activated carbon with water to pH=6.5, drain Dry and dry at 110°C.

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Abstract

The invention discloses a method for preparing activated carbon from Polygonum polygonum stalks, which belongs to the technical field of activated carbon. The main steps are cleaning, crushing, soaking, carbonization and activation, water washing and the like of Polygonum rubra stalks. The activated carbon prepared by the method has large specific surface area and pore volume, strong adsorption capacity, low cost and no pollution.

Description

technical field [0001] The invention relates to a method for preparing activated carbon used in the advanced treatment and purification process of waste water, in particular to preparing the activated carbon required in the water treatment process from the stalk of Polygonum rubrum. Background technique [0002] At present, there are many raw materials for preparing activated carbon, such as wood, coal, etc. Although the performance of activated carbon is relatively ideal, with the enhancement of social environmental protection awareness, people gradually realize that the preparation of activated carbon from wood is not conducive to the protection of the ecological environment. The ban on logging in natural forests has shrunk the source of wood; while coal is a non-renewable resource, and the preparation process is prone to secondary pollution. However, the performance of activated carbon made from raw materials such as fruit shells, waste plastics, and sludge is not high. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/08
Inventor 张建张成禄代嫣然李燕高春芳
Owner SHANDONG UNIV
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