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Bimetallic modified magnetic biomass activated carbon adsorbent, its preparation method and application in waste water treatment

An activated carbon adsorption and biomass technology, applied in the direction of adsorption of water/sewage treatment, alkali metal compounds, water/sewage treatment, etc., can solve the problems of cumbersome process steps, high preparation costs, and environmental pollution of reactants, and achieve a wide range of raw material sources , The preparation process is simple, the effect of high adsorption performance

Active Publication Date: 2019-07-05
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses ZnCl 2 As a chemical activator, there are certain environmental pollution problems; and the preparation steps are relatively cumbersome, and the magnetic strength of the obtained magnetic activated carbon is not high
[0006] In summary, the existing magnetic biomass activated carbon preparation process generally has the problems of cumbersome process steps, high preparation cost, environmental pollution by reactants, and unsatisfactory magnetic properties and adsorption capacity.

Method used

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  • Bimetallic modified magnetic biomass activated carbon adsorbent, its preparation method and application in waste water treatment
  • Bimetallic modified magnetic biomass activated carbon adsorbent, its preparation method and application in waste water treatment
  • Bimetallic modified magnetic biomass activated carbon adsorbent, its preparation method and application in waste water treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A bimetallic modified magnetic biomass activated carbon adsorbent, comprising components by mass: 20 g of peanut shell powder, FeCl 3 ·6H 2 O 10 g, MgCl 2 ·6H 2 O 2.5 g.

[0030] The preparation method is as follows:

[0031] Step 1, washing peanut shells with deionized water, drying at 105°C for 48 hours, crushing to 60-100 mesh and drying for later use;

[0032] Step 2, weigh 10 g FeCl respectively 3 ·6H 2 O and 2.5 g MgCl 2 ·6H 2 O was dissolved in 150ml of deionized water, 20 g of peanut shell powder was added, and after magnetic stirring at room temperature for 12 h, the solid was collected by suction filtration and dried in an oven at 105 °C for 24 h to obtain the precursor of Fe-Mg bimetallic biomass activated carbon ;

[0033] Step 3, first pass CO with a flow rate of 250 mL / min 2 After degassing for 30 min, about 6 g of precursor solid powder was weighed and placed in a horizontal tube furnace, and the activation temperature was set at 800 °C. 2 Acti...

Embodiment 2

[0036] A bimetallic modified magnetic biomass activated carbon adsorbent, peanut shell powder 20 g, FeCl 3 ·6H 2 O 10 g, MgCl 2 ·6H 2 O 5 g.

[0037] The preparation method is as follows:

[0038] Step 1, washing peanut shells with deionized water, drying at 105°C for 48 hours, crushing to 60-100 mesh and drying for later use;

[0039] Step 2, weigh 10 g FeCl respectively 3 ·6H 2 O and 5 g MgCl 2 ·6H 2 O was dissolved in 150ml of deionized water, 20g of peanut shell powder was added, and after magnetic stirring at room temperature for 12 hours, the solid was collected by suction filtration and dried in an oven at 105°C for 24 hours to obtain the precursor of Fe-Mg bimetallic biomass activated carbon;

[0040] Step 3, first pass CO with a flow rate of 250 mL / min 2 After degassing for 30 min, about 6 g of precursor solid powder was weighed and placed in a horizontal tube furnace, and the activation temperature was set at 800 °C. 2 Activation in the atmosphere for 90 mi...

Embodiment 3

[0043] A bimetallic modified magnetic biomass activated carbon adsorbent, peanut shell powder 20 g, FeCl 3 ·6H 2 O 10 g, MgCl 2 ·6H 2 O 10 g.

[0044] The preparation method is as follows:

[0045] Step 1, washing peanut shells with deionized water, drying at 105°C for 48 hours, crushing to 60-100 mesh and drying for later use;

[0046] Step 2, weigh 10 g FeCl respectively 3 ·6H 2 O and 10 g MgCl 2 ·6H 2 O was dissolved in 150ml of deionized water, 20g of peanut shell powder was added, and after magnetic stirring at room temperature for 12 hours, the solid was collected by suction filtration and dried in an oven at 105°C for 24 hours to obtain the precursor of Fe-Mg bimetallic biomass activated carbon;

[0047] Step 3, first pass CO with a flow rate of 250 mL / min 2 After degassing for 30 min, about 6 g of precursor solid powder was weighed and placed in a horizontal tube furnace, and the activation temperature was set at 800 °C. 2 Activation in the atmosphere for 90 ...

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Abstract

A bimetallic modified magnetic biomass activated carbon adsorbent, its preparation method and application in waste water treatment are disclosed. Peanut hull is taken as raw material, the binary mixedsystem of FeCl3.6H2O and MgCl2.6H2O is introduced as magnetizing material, and CO2 is used as physical activator. The activation and magnetization steps are completed at one time by impregnation andheat treatment. The preparation process of magnetic activated carbon is simplified and the magnetic activated carbon is modified. The prepared Fe-Mg bimetallic magnetic activated carbon is used to treat cationic dyestuff wastewater. The invention utilizes biomass agricultural and forestry wastes to treat dye wastewater, and the preparation process is simple, the cost is low, and the environmentalpollution is small. Fe3O4 / MgO composite nanoparticles are formed by the introduction of binary system, especially suitable for the adsorption of malachite green dye, and the adsorbent is easy to recover, and the pH requirement of the actual wastewater is low, and the adsorbent is favorable for large-scale industrial application.

Description

technical field [0001] The invention relates to the field of magnetic activated carbon preparation and adsorption, in particular to a bimetallic modified magnetic biomass activated carbon adsorbent, a preparation method thereof and its application in wastewater treatment. Background technique [0002] Dye is the most polluting part of industrial wastewater. my country produces more than 700,000 tons of dye wastewater every year, of which about 1,000 tons of dye wastewater is discharged into the water system, posing a huge threat to human health and the growth of aquatic organisms. Malachite green is a typical triphenylmethane compound, which is widely used in the textile industry as a basic cationic dye. In addition, malachite green is also used in aquaculture as an antibacterial and parasiticide. Due to its carcinogenic, mutagenic and teratogenic properties, the discharge of malachite green into water bodies will threaten the growth and reproduction of aquatic organisms, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/046B01J20/24B01J20/28009C02F1/281C02F1/286C02F1/288C02F2101/308
Inventor 郭飞强李晓蕾彭旷野蒋孝晨赵兴民郭成龙
Owner CHINA UNIV OF MINING & TECH
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