Preparation method for composite activated biochar capable of adsorbing heavy metal ions in sewage

A technology of heavy metal ions and biochar, which is applied in the fields of adsorbing water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve the problem of low adsorption capacity, increase the specific surface area, facilitate adsorption, and increase contact opportunities. Effect

Inactive Publication Date: 2018-11-30
安徽宇瑞环保建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to better develop and utilize the chestnut shells of agricultural and forestry wastes, and promote energy conservation and emission reduction, domestic and foreign research on chestnut shells has involved the use of chestnut shells for sewage treatment, but chestnut shells are directly used for heavy metal ion adsorption, and the adsorption capacity is low. Low, needs further improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing composite activated biochar capable of absorbing heavy metal ions in sewage, characterized in that it comprises the following steps:

[0030] (1) Preparation of pine needle-based carbon materials:

[0031] The pre-treated pine needles were placed in a corundum crucible, put into a carbonization furnace, and N 2 Carry out carbonization treatment, use a temperature controller to control the temperature rise rate to 2°C / min, stay at 495-505°C for 1 hour, stay at 595-605°C for 1 hour, and stay at 695-705°C for 1 hour. Cool to room temperature, take out and grind into powder, wash with distilled water until neutral, and dry at 115-120°C for 7 hours to obtain pine needle-based carbon material;

[0032] (2) Preparation of puffed rice husk:

[0033] Clean and pulverize 10 parts of rice husks, add 3% carbonate-based expanding agent, control the feed temperature to 80-110°C, and the discharge temperature to 250-300°C, adjust the moisture content of the ra...

Embodiment 2

[0045] A method for preparing composite activated biochar capable of absorbing heavy metal ions in sewage, characterized in that it comprises the following steps:

[0046] (1) Preparation of pine needle-based carbon materials:

[0047] The pre-treated pine needles were placed in a corundum crucible, put into a carbonization furnace, and N 2 Carry out carbonization treatment, use a temperature controller to control the temperature rise rate to 2°C / min, stay at 495-505°C for 2 hours, stay at 595-605°C for 2 hours, and stay at 695-705°C for 2 hours. Cool to room temperature, take out and grind into powder, wash with distilled water until neutral, and dry at 115-120°C for 8 hours to obtain pine needle-based carbon material;

[0048] (2) Preparation of puffed rice husk:

[0049] After cleaning 20 parts of rice husks, crush them, add 5% carbonate-based expanding agent, control the feed temperature to 80-110°C, and the discharge temperature to 250-300°C, adjust the moisture content...

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PUM

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Abstract

The invention discloses a preparation method for composite activated biochar capable of adsorbing heavy metal ions in sewage. According to the preparation method, a saponification-modified orange peelbio-adsorbent, an obtained pine needle-based carbon material, puffed rice husks, a chestnut shell activated carbon material and walnut green husk biochar are uniformly mixed so as to obtain the composite activated biochar. The preparation method has the advantages that pine needles serve as a carbon source, alkali treatment is carried out, then carbonizing is carried out, so that the pine needle-based carbon material with developed pore channel structures and high nitrogen content is successfully prepared, by means of the developed pore channel structures and rich nitrogen-contained functional groups, and the prepared pine needle-based carbon material shows good adsorption performance on the metal ions and has good repeated use performance; chestnut shells serve as a raw material, activated carbon is prepared by adopting a ZnCl2 activation method, the chestnut shell activated carbon is an amorphous carbon material with more pores; and biological waste orange peels serve as a raw material, and ethanol and sodium hydroxide treatment are carried out so as to obtain the modified orange peel biological adsorbent.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a preparation method of composite activated biochar capable of absorbing heavy metal ions in sewage. Background technique [0002] The rapid development of modern industry produces a large amount of wastewater containing heavy metals, and heavy metals are a type of pollutant that is extremely harmful to the ecological environment. Because they cannot be biodegraded after entering the environment, they often participate in the food chain cycle and eventually accumulate in the organism, destroying The normal physiological and metabolic activities of organisms endanger human health. How to eliminate the hazards of heavy metals and effectively recover precious metals is a prominent problem facing environmental protection today. With the deepening of economic globalization and the rapid development of our society, the pollution of heavy metal ions has become a killer that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24C02F1/28B01J20/30C02F101/20C02F101/22
CPCB01J20/20B01J20/24B01J2220/4825B01J2220/485C02F1/283C02F1/286C02F2101/20C02F2101/22
Inventor 祁芳
Owner 安徽宇瑞环保建设有限公司
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