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Biomass charcoal based soil remediation agent and its preparation method

A technology of soil remediation agent and biochar, which is applied in the field of soil remediation, can solve the problems such as the decline of the ability of biochar to absorb pollutants, and achieve the effect of avoiding environmental pollution and waste of resources, and efficient utilization

Active Publication Date: 2013-10-16
北京如景生态园林绿化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the adsorption of biochar in soil reaches saturation, the ability of biochar to adsorb pollutants will decrease or no longer have the ability to adsorb pollutants.

Method used

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  • Biomass charcoal based soil remediation agent and its preparation method

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Effect test

Embodiment 1

[0023] A biochar-based soil restoration agent comprises a photocatalytic oxidant and a carrier; the photocatalytic oxidant is titanium dioxide; the mass of the titanium dioxide is 5% of the mass of the carrier, and the carrier is bamboo biochar.

[0024] A preparation method of biochar-based soil remediation agent, comprising the following steps:

[0025] A. Pulverize raw materials: pulverize bamboo waste into 80-100 mesh;

[0026] B. Preparation of biomass material: Add the crushed bamboo waste into the anatase nano-titanium dioxide aqueous dispersion, soak for 30 hours, filter, dry at 105°C for 4 hours to remove free water, and obtain biomass Material;

[0027] C. Preparation of biochar-based soil remediation agent: Add biomass materials into the pyrolysis reactor, heat up to 400°C under anaerobic conditions, carry out pyrolysis and carbonization reaction, and keep warm for 10 minutes to obtain biochar-based soil Restorative.

[0028] In step B, the concentration of the a...

Embodiment 2

[0032] A biochar-based soil restoration agent comprises a photocatalytic oxidant and a carrier; the photocatalytic oxidant is titanium dioxide; the mass of the titanium dioxide is 10% of the mass of the carrier, and the carrier is rice straw biochar.

[0033] A preparation method of biochar-based soil remediation agent, comprising the following steps:

[0034] A. Grinding raw materials: crushing rice straw to 40-60 mesh;

[0035] B. Preparation of biomass material: add crushed rice straw into anatase nano-titanium dioxide aqueous dispersion, soak for 48 hours, filter, dry at 105°C for 4 hours to remove free water, and obtain biomass material ;

[0036] C. Preparation of biochar-based soil remediation agent: Add biomass materials into the pyrolysis reactor, heat up to 550°C under anaerobic conditions, perform pyrolysis and carbonization reaction, and keep warm for 60 minutes to obtain biochar-based soil Restorative.

[0037] In step B, the concentration of the anatase nano-t...

Embodiment 3

[0041] A biochar-based soil restoration agent comprises a photocatalytic oxidant and a carrier; the photocatalytic oxidant is titanium dioxide; the mass of the titanium dioxide is 7% of the mass of the carrier, and the carrier is biochar.

[0042] A preparation method of biochar-based soil remediation agent, comprising the following steps:

[0043] A. Grinding raw materials: crushing rice straw to 80-100 mesh;

[0044] B. Preparation of biomass material: Add crushed rice straw to anatase nano-titanium dioxide aqueous dispersion, soak for 24 hours, filter, dry at 105°C for 4 hours to remove free water, and obtain biomass material ;

[0045] C. Preparation of biochar-based soil remediation agent: Add biomass materials into the pyrolysis reactor, raise the temperature to 350°C under anaerobic conditions, and perform pyrolysis and carbonization reaction for 30 minutes to obtain biochar-based soil Restorative.

[0046] In step B, the concentration of the anatase nano-titanium di...

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Abstract

Belonging to the field of soil remediation, the invention relates to a biomass charcoal based soil remediation agent, which includes a photocatalytic oxidant and a carrier. The photocatalytic oxidant is titanium dioxide, and the carrier is biomass charcoal. The invention also relates to a preparation method of the biomass charcoal based soil remediation agent. The method comprises the steps of: A. material crushing; B. preparation of a biomass material; and C. preparation of the biomass charcoal based soil remediation agent. The biomass charcoal based soil remediation agent provided in the invention is a novel soil remediation agent, and is especially suitable for remediation of soil contaminated by organic matters. The biomass charcoal has the capacity of adsorbing organic pollutants in soil, and titanium dioxide has characteristic of photocatalytic oxidation degradation of organic matters. Thus, titanium dioxide can degrade organic pollutants adsorbed on the biomass charcoal surface. The preparation method of the biomass charcoal based soil remediation agent provided in the invention has the advantages of convenient preparation, simple conditions, safety and reliability.

Description

technical field [0001] The invention belongs to the field of soil restoration, relates to a biochar-based soil restoration agent, and also relates to a preparation method of the biochar-based soil restoration agent. Background technique [0002] Soil pollution has become a worldwide problem, and organic pollution, especially persistent organic pollutant pollution is a major type of soil pollution. According to preliminary statistics, there are at least 13-16 million hectares of arable land polluted by pesticides and other organic substances in my country, and the trend is increasing day by day. Soil pollution can affect the yield and quality of crops, endanger human health through the food chain, and lead to further deterioration of the quality of the air and water environment. Therefore, the control of soil pollution is urgent. [0003] The porous structure of biochar and the abundant oxygen-containing functional groups on the surface make biochar have a strong ability to...

Claims

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Application Information

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IPC IPC(8): C09K17/02
Inventor 宋成芳单胜道叶正钱曹玉成
Owner 北京如景生态园林绿化有限公司
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