A preparation method of modified biochar, modified biochar, composite material and soil remediation agent

A soil remediation agent, biochar technology, applied in soil conditioning materials, chemical instruments and methods, organic fertilizers, etc., can solve the problems of environmental organisms and crop threats, pesticides are difficult to degrade in time, heavy metals increase, etc., to promote mass reproduction. , to achieve the effect of soil remediation and improvement, and the preparation method is simple

Active Publication Date: 2021-03-02
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application rate of acetochlor has been maintained at a high level for a long time, and the residual pesticides in the soil are difficult to be degraded in time, resulting in a large amount of long-term residues in the soil
As an endocrine disruptor and a potential carcinogen, acetochlor has a greater environmental risk, and it may pose a potential threat to environmental organisms and crops after being used in large quantities
[0003] Moreover, with the continuous development of industry and agriculture, the frequent use of sewage irrigation, pesticides and fertilizers containing heavy metals, etc., makes the heavy metals entering the environment more and more, which further deteriorates the environment.

Method used

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  • A preparation method of modified biochar, modified biochar, composite material and soil remediation agent
  • A preparation method of modified biochar, modified biochar, composite material and soil remediation agent
  • A preparation method of modified biochar, modified biochar, composite material and soil remediation agent

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preparation example Construction

[0028] The invention provides a kind of preparation method of modified biochar, comprising the following steps:

[0029] (1) peanut shell powder and graphene oxide suspension are mixed and filtered to obtain the peanut shell powder after the graphene oxide suspension is impregnated; the mass ratio of the peanut shell powder to the graphene oxide suspension is (50~ 100) g: (0.8 ~ 1.2) L;

[0030] (2) the peanut shell powder and nano-SiO after the graphene oxide suspension impregnated that described step (1) obtains 2 Mix to obtain a mixture; the peanut shell powder and nano-SiO after the graphene oxide suspension is impregnated 2 The mass ratio is (80~120):(0.25~0.5);

[0031] (3) mixing the mixture obtained in the step (2) with water to obtain a mixture; the mass of the mixture and the volume ratio of water are (0.8~1.2)kg:(12~18)L;

[0032] (4) Carbonize the mixture obtained in the step (3) to obtain hydrated carbon, dry the obtained hydrated carbon to obtain modified bioc...

Embodiment 1

[0063] The preparation method of modified biochar:

[0064] Peanut shells were washed with deionized water, air-dried, crushed, passed through a 60-mesh sieve, and impregnated with 0.1% GO suspension. The impregnation ratio of peanut shell powder and GO solution was 50g:1L, and the impregnation time was 4h. Mix with a medium agitator at 100rpm, stand still for 1.5h after the impregnation, collect peanut shell powder and recover the supernatant for reuse. Peanut shell powder and nano-SiO impregnated with GO 2Mix according to the mass ratio of 100g:0.25g, mix evenly, add deionized water, the solid-liquid ratio is 1kg:12L, stir and mix to obtain a solid-liquid mixture. Transfer the solid-liquid mixture into a closed high-pressure reactor for hydrothermal carbonization treatment, and react at a constant temperature of 180°C for 20h. After the reaction was completed, the reactor was slowly cooled until the temperature in the reactor dropped to room temperature, and the solid phas...

Embodiment 2

[0068] The preparation method of modified biochar:

[0069] Peanut shells were washed with deionized water, air-dried, crushed, passed through a 60-mesh sieve, and impregnated with 0.2% GO suspension. The impregnation ratio of peanut shell powder and GO solution was 100g:1L, and the impregnation time was 5h. Mix with a medium stirrer at 100rpm, stand still for 2 hours after the impregnation, collect peanut shell powder and recover the supernatant for reuse. Peanut shell powder and nano-SiO impregnated with GO 2 Mix according to the mass ratio of 100g:0.50g, mix evenly, add deionized water, the solid-liquid ratio is 1kg:18L, stir and mix to obtain a solid-liquid mixture. Transfer the solid-liquid mixture into a closed high-pressure reactor for hydrothermal carbonization treatment, and react at a constant temperature of 190°C for 18h. After the reaction was completed, the reactor was slowly cooled until the temperature in the reactor dropped to room temperature, and the solid ...

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Abstract

The invention provides a preparation method of modified biochar, modified biochar, composite material and soil remediation agent, and relates to the technical field of biochar. The preparation method of said biochar comprises the following steps of combining peanut shell powder with graphene oxide The suspension is mixed to obtain the peanut shell powder impregnated with the graphene oxide suspension; the peanut shell powder impregnated with the obtained graphene oxide suspension and nano-SiO 2 mixing to obtain a mixture; mixing the obtained mixture with water to obtain a mixture; carbonizing the obtained mixture to obtain hydrated carbon, and drying the obtained hydrated carbon to obtain modified biochar. The modified biochar provided by the invention has porosity, huge specific surface area and good adsorption capacity, and can effectively reduce the activity of soil heavy metals in soil.

Description

technical field [0001] The invention relates to the technical field of biochar, in particular to a preparation method of modified biochar, modified biochar, composite material and soil remediation agent. Background technique [0002] Acetochlor is one of the most used herbicides in the world. The application rate of acetochlor has been maintained at a high level for a long time, and the residual pesticides in the soil are difficult to be degraded in time, resulting in a large amount of long-term residues in the soil. As an endocrine disruptor and a potential carcinogen, acetochlor has a greater environmental risk, and it may pose a potential threat to environmental organisms and crops after being used in large quantities. [0003] Moreover, with the continuous development of industry and agriculture, the frequent use of sewage irrigation, heavy metal-containing pesticides and chemical fertilizers, etc., has caused an increase in heavy metals entering the environment, furthe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B01J20/20B01J20/30C09K101/00
CPCB01J20/20C09K17/40C09K2101/00
Inventor 宋宁宁王芳丽
Owner QINGDAO AGRI UNIV
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