Method for preparing iron-based magnetic activated carbon by catalytic activation of radix puerariae waste residue with compound enzyme

A magnetic activated carbon and catalytic activation technology, applied in chemical instruments and methods, inorganic chemistry, chemical industry, etc., can solve the problems of poor product quality, high production energy consumption, increased environmental conditions, etc., to reduce secondary pollution, excellent The effect of adsorption performance

Inactive Publication Date: 2014-03-12
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this method are: (1) the use of a single chemical reagent zinc chloride solution to activate the wood chip base material, single physical action on the raw material, insufficient pretreatment activation leads to poor quality of the produced product; (2) in the production process, the activation condition is 60°C, 6h, chemical heat treatment temperature at 700°C, N 2 Atmosphere, increasing environmental conditions, resulting in high production energy consumption, thereby increasing production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The specific steps of a method for preparing iron-based magnetic activated carbon by catalyzing and activating kudzu root waste residue with complex enzymes are as follows:

[0023] (1) Pretreatment of kudzu root waste residue

[0024] Wash 4.0 g of discarded tobacco leaves, dry them, place them in an oven, bake them in an oven at 80°C for 30 minutes, take them out, crush them with a pulverizer, and then sieve them through a 40-mesh molecular sieve to obtain kudzu root waste residue with a particle size of less than 40 mesh. Pack in plastic bags and set aside.

[0025] (2) Activation of kudzu root waste residue

[0026]After the first step (1) is completed, the Pueraria solid waste raw material (g):enzyme (g):water volume (ml) ratio after the treatment according to the first step (1) is 1:0.35:10, and the compound enzyme The ratio of cellulase (g): ligninase (g): pectinase (g) is 1:2:1. In the raw material pretreated in step (1), add enzyme and water first, then adju...

Embodiment 2

[0032] A method for preparing iron-based magnetic activated carbon by catalyzing and activating kudzu root waste residue with complex enzymes, the same as in Example 1, wherein:

[0033] In step (1), the kudzu slag mesh is selected as 100 mesh, the oven temperature is 85°C, and the drying time is 20 minutes.

[0034] In the (2) step, the composite enzyme is cellulase (g): ligninase (g): pectinase (g) mass ratio is 3:5:1, kudzu root solid waste raw material (g): enzyme (g): The volume (ml) ratio of water is 1:0.2:5, with H 2 SO 4 Adjust the pH of the solution to 4. After mixing evenly, enzymolyze and activate the kudzu root base material at a water bath temperature of 25°C for 36 hours. : 1, impregnation with intermittent stirring for 3h.

[0035] In the (3) step, the concentration of the magnetizer is 0.01mol / L, and the magnetizer Fe 2+ with Fe 3+ The molar ratio is 1.0, the molar ratio of Pueraria solid waste raw material mass and magnetizing agent is 1:0.005, and the pH...

Embodiment 3

[0038] A method for preparing iron-based magnetic activated carbon by catalyzing and activating kudzu root waste residue with complex enzymes, the same as in Example 1, wherein:

[0039] In step (1), the kudzu slag mesh is selected as 20 mesh, the oven temperature is 60°C, and the drying time is 60 minutes.

[0040] In the (2) step, the composite enzyme is cellulase (g): ligninase (g): pectinase (g) mass ratio is 1:1:1, kudzu root solid waste raw material (g): enzyme (g): the volume ratio of water (ml) is 1:0.6:15, and the pH of the solution is adjusted to be 8 with NaOH. After mixing evenly, enzymolysis and activation of kudzu root base material at 50° C. of water bath temperature for 8 h, the quality of kudzu root solid waste raw material ( g) : The volume (ml) ratio of zinc chloride solution with a mass concentration of 25% is 1:3, and the impregnation is intermittently stirred for 0.5h.

[0041] In the (3) step, the concentration of the magnetizer is 0.03mol / L, and the ma...

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Abstract

The invention provides a method for preparing iron-based magnetic activated carbon from by catalytic activation of radix puerariae waste residue with compound enzyme, and belongs to the technical field of activated carbon. The method comprises the steps of by taking the radix puerariae waste residue as the raw material, carrying out raw material pretreatment, preparing a radix puerariae activated substrate through catalytic activation with compound enzymes (cellulase, ligninase and pectinase), and preparing the magnetic activated carbon by doping iron, thereby obtaining the product. The method provided by the invention has the characteristics of wide raw material source, low waste material utilization cost, few production steps and low process energy consumption and no secondary pollution, and is beneficial to environment protection; the activated carbon product are excellent in adsorptive property and the magnetic properties and wide in application, and secondary pollution caused by difficult activated carbon recovery is not generated, etc. The method can be widely applied to preparation of the magnetic activated carbon by using the radix puerariae residue solid wastes as raw materials and doping iron; the activated carbon prepared by the method can be widely applied to the fields of waste water treatment, oil fume desorption and odor adsorption in food preservation and the like.

Description

technical field [0001] The invention belongs to the technical field of preparing activated carbon, and in particular relates to a method for preparing magnetic activated carbon by catalyzing and activating kudzu root waste slag base material mixed with iron by using compound enzymes. Background technique [0002] Activated carbon has an amorphous structure based on graphite microcrystals. Because of its developed microporous structure, it exhibits excellent adsorption performance. It is an excellent adsorbent widely used in the adsorption treatment of industrial wastewater and organic waste gas. The magnetic activated carbon is based on activated carbon, loaded with magnetized substances through the base material, and then activated, chemically heat treated, cleaned, and dried to obtain magnetic activated carbon. Because of its good adsorption performance and magnetic properties, it can be used in the fields of adsorption of heavy metal ions and cyanide-containing wastewater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C01B31/12C01B32/324C01B32/342C01B32/354
CPCY02P20/10
Inventor 王星敏张渝文李鑫胥江河冉鹏程
Owner CHONGQING TECH & BUSINESS UNIV
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