Preparation method of modified biochar, modified biochar, composite material and soil repairing agent

A soil remediation agent and composite material technology, applied in the field of biochar, can solve the problems of environmental biological and crop threats, pesticides are difficult to be degraded in time, and large environmental risks, to promote mass reproduction, achieve soil remediation and improvement, and strong pesticides. The effect of degradability

Active Publication Date: 2019-10-15
QINGDAO AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 residual pesticides 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 a large amount of use
[0003] Moreover, with the continuous development of industry and agriculture, the frequent use of sewage irrigation, heavy metal-containing pesticides and chemical fertilizers, etc., makes the heavy metals entering the environment more and more, which further deteriorates the environment.

Method used

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  • Preparation method of modified biochar, modified biochar, composite material and soil repairing agent
  • Preparation method of modified biochar, modified biochar, composite material and soil repairing agent
  • Preparation method of modified biochar, modified biochar, composite material and soil repairing 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 2 Mix according to the ratio of 100g:0.25g in mass ratio, add deionized water after mixing evenly, solid-liquid ratio is 1 kg:12L, stir and mix to obtain 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 20 h. After the reaction was completed, the reactor was cooled slowly until the temperature in the reactor dropped to room temperature, and ...

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 ratio of 100g:0.50g in mass ratio, add deionized water after mixing evenly, 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 18 h. After the reaction was completed, the reactor was cooled slowly until the temperature in the reactor dropped to room temperat...

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Abstract

The invention provides a preparation method of modified biochar, the modified biochar, a composite material and a soil repairing agent, and relates to the technical field of biochar. The preparation method of the biochar comprises the following steps: mixing peanut shell powder with a graphene oxide suspension to obtain peanut shell powder impregnated with the graphene oxide suspension; mixing theobtained peanut shell powder impregnated with the graphene oxide suspension with the nano-SiO2 to obtain a mixed material; mixing the obtained mixed material with water to obtain a mixture; carbonizing the mixture to obtain hydrated carbon, and drying the obtained hydrated carbon to obtain the modified biochar. The modified biochar provided by the invention has porosity, large specific surface area and good adsorption capacity, and can effectively reduce the activity of soil heavy metals in the 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, frequent use of sewage irrigation, heavy metal-containing pesticides and chemical fertilizers, etc., the heavy metals entering the environment are increasing, which further det...

Claims

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Application Information

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Patent Type & Authority Applications(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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