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Modified charcoal, soil repairing agent and preparation method and application thereof

A soil remediation agent and biochar technology, which is applied in the restoration of polluted soil, application, soil conditioning materials, etc., can solve the problems of heavy metal-pesticide compound pollution, reduce the toxicity of pesticide-heavy metal compound pollution, and have no secondary pollution , significant environmental and economic advantages

Active Publication Date: 2019-10-08
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These production methods lead to the combined pollution of heavy metals and pesticides, and the remediation of multiple polluted soils has become a research hotspot in the field of environmental science.

Method used

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  • Modified charcoal, soil repairing agent and preparation method and application thereof
  • Modified charcoal, soil repairing agent and preparation method and application thereof
  • Modified charcoal, soil repairing agent and preparation method and application thereof

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preparation example Construction

[0032] The present invention also provides a method for preparing the modified biochar described in the above technical solution, comprising: mixing the corn stalks, graphene oxide suspension, nano-SiO 2 Suspension and CaCl 2 After the solutions are mixed, carry out hydrothermal carbonization treatment to obtain hydrated carbon; dry the hydrated carbon to obtain modified biochar; the temperature of the hydrothermal carbonization treatment is 180-200°C; the time of the hydrothermal carbonization treatment For 16 ~ 20h.

[0033]In the present invention, the corn stalks are preferably crushed to obtain corn stalk powder. The method of crushing the corn stalks is not particularly limited in the present invention, and the corn stalks are preferably washed with water, air-dried and then crushed, and the particle size of the corn stalk powder obtained after the crushing is ≤250 μm.

[0034] In the present invention, there is no special limitation on the mixing method. Ultrasonic mi...

Embodiment 1

[0064] The preparation method of modified biochar:

[0065] (1) Wash the corn stalks with deionized water, air-dry, pulverize, and pass through a 60-mesh sieve;

[0066] (2) Preparation of 1% graphene oxide (GO) suspension: Dissolve 1 g of powdered GO in 100 ml of deionized water, and ultrasonically disperse in an ultrasonic disperser for 30 min to obtain a uniformly dispersed 1% GO suspension;

[0067] (3) 2% Nano SiO 2 Suspension preparation: 1g nano-SiO 2 Add it to 50ml of deionized water, move it into an ultrasonic disperser and disperse ultrasonically for 30 minutes to obtain 2% nano-SiO 2 suspension;

[0068] (4) 1.5% CaCl 2 Solution preparation: 1.5g CaCl 2 Add to 100ml deionized water and mix well to get 1.5% CaCl 2 solution;

[0069] (5) 50g of corn stalk powder, 20ml of 1% GO suspension, 2% nano-SiO 2 Suspension 15ml, 1.5% CaCl 2 25ml of the solution was mixed evenly, ultrasonically dispersed for 45min, transferred to a hydrothermal synthesis reactor, sealed...

Embodiment 2

[0073]The preparation method of modified biochar:

[0074] 50g of corn stalk powder, 10ml of 1% GO suspension, 2% nano-SiO 2 Suspension 25ml, 1.5% CaC l2 Mix 15ml of the solution evenly, disperse it ultrasonically for 30min, transfer it to a hydrothermal synthesis reactor, seal it, and react at a constant temperature of 180°C for 20h. After cooling to room temperature, take out the solid phase product, and then place it in an oven at 80°C for drying treatment. After drying for 16h, you can get Modified biochar GO / Si / Ca / BC. Corn straw powder, 1% GO suspension, 2% nano-SiO 2 Suspension and 1.5% CaCl 2 The preparation method of solution is identical with embodiment 1.

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Abstract

The invention provides modified charcoal, a soil repairing agent and a preparation method and application thereof, and relates to the technical field of charcoal. The modified charcoal provided by theinvention is prepared from corn straw, a graphene oxide suspension, a nano SiO2 suspension and a CaCl2 solution, wherein the volume ratio of the corn straw to the graphene oxide suspension, the nanoSiO2 suspension and the CaCl2 solution is (45-55)g:(10-20)mL:(15-25)mL:(15-25)mL. The modified charcoal provided by the invention has a porous property and a large specific surface area, has a good adsorption capability, and is capable of effectively degrading activity of soil heavy metals and organic pollutants in soil.

Description

technical field [0001] The invention relates to the technical field of biochar, in particular to a modified biochar, a soil remediation agent and a preparation method and application thereof. Background technique [0002] Atrazine (AT), because of its excellent herbicidal effect and low price, has been widely used and promoted in countries all over the world. Because AT has the characteristics of refractory degradation and long persistence in soil, it is easy to cause harm to the environment and human beings, and has hidden phytotoxicity to subsequent crops, which has caused widespread public concern about its pollution and prevention. [0003] In addition, with the continuous development of industry and agriculture, the frequent use of sewage irrigation, pesticides and fertilizers containing heavy metals, etc., has caused an increasing amount of heavy metals to enter the environment, further deteriorating the environment. These production methods lead to heavy metal-pestic...

Claims

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Application Information

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IPC IPC(8): C09K17/40B01J20/20B01J20/30B09C1/08B09C1/10C09K109/00
CPCB01J20/20B09C1/08B09C1/10C09K17/40C09K2109/00
Inventor 宋宁宁宗海英
Owner QINGDAO AGRI UNIV
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