Method for reducing emission of nitrous oxide in soil of camellia oleifera forest by utilizing bamboo reed charcoal

A nitrous oxide, biochar technology, applied in chemical instruments and methods, restoration of polluted soil, alkali metal oxides/hydroxides, etc., can solve the specific surface area, pore size and distribution, density and adsorption capacity of biochar It has not been improved, the nitrogen dioxide adsorption capacity of soil is limited, etc., to achieve a good adsorption level, improve the adsorption effect, and improve the effect of the adsorption capacity

Inactive Publication Date: 2020-03-31
ANHUI SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the bamboo is directly sown into the soil after being carbonized, and the specific surface area, pore size and distribution, density and adsorption capacity of the biochar have not been improved, and the nitrogen dioxide adsorption capacity of the soil is limited.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0022] The present invention provides a technical solution: a method for reducing nitrous oxide emissions from Camellia oleifera forest soil by using reed bamboo biochar:

[0023] After collecting the mature Arundis, cut its diameter into 3cm pieces, air-dried for 1d, and dried in an oven at 80°C for 6h; Min in an inert gas atmosphere at a rate of 20 °C / min to 600 °C to maintain a constant temperature; and at a flow rate of 500 ml / min in an inert gas atmosphere at a constant temperature for 2.5 hours, naturally cooled to room temperature, to obtain Arundis biochar; Grind the biochar, sieve it, take 80~40 mesh Arundis charcoal, and treat it with 200ml 1mol / L hydrogen chloride solution for 10h to remove the ash of the Arundis biochar; use the KOH method to activate the biochar, and the biochar after activation The BET specific surface area is not less than 1200㎡ / g;

[0024] The soil of camellia oleifera forest in the suburbs of Qimen County, Huangshan City, Anhui Province was c...

Embodiment 2

[0029] After collecting the mature Arundos reeds, cut the diameters into 3cm pieces, air-dried for 1d, and dried in an oven at 60°C for 8h; In an inert gas atmosphere for 1 min, the temperature was raised to 550 °C at a rate of 20 °C / min to maintain a constant temperature; and at a flow rate of 500 ml / min in an inert gas atmosphere, the temperature was kept at a constant temperature for 3 h, and the temperature was naturally cooled to room temperature to obtain Arundis biochar; Grind and sieve the charcoal, take 80~40 mesh Arundis charcoal, and treat it with 200ml 1mol / L hydrogen chloride solution for 10h to remove the ash content of Arundis biochar; use KOH method to activate the biochar, and the BET of activated biochar The specific surface area is not less than 1200㎡ / g;

[0030] The soil of camellia oleifera forest in the suburbs of Qimen County, Huangshan City, Anhui Province was collected, and the soil impurities were cleaned and air-dried; two soils were prepared,

[00...

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Abstract

The invention discloses a method for reducing the emission of nitrous oxide in the soil of a camellia oleifera forest by utilizing bamboo reed biochar, belonging to the field of emission reduction ofgreenhouse gas. The method comprises the following specific steps: step 1, preparation of a raw material: harvesting mature bamboo reeds, cutting the stems of the mature bamboo reeds into bamboo reedpieces with lengths in a range of 1-3 cm, drying the bamboo reed pieces in the air for 1 day, and drying the bamboo reed pieces in a drying oven for a plurality of hours; step 2, carbonization of thebamboo reed pieces: transferring the bamboo reed pieces into a muffle furnace, carrying out heating to a carbonizing temperature in an inert gas atmosphere, keeping the carbonized bamboo reed pieces at a constant temperature for a plurality of hours, and performing natural cooling to room temperature to obtain the bamboo reed biochar; step 3, treatment of the bamboo reed biochar: grinding and sieving the bamboo reed biochar, taking bamboo reed biochar with fineness of 80 to 40 meshes, and treating the bamboo reed biochar with 200 ml of a hydrogen chloride solution with a concentration of 1 mol / L for 10 hours to remove ash in the bamboo reed biochar; step 4, biochar activation: activating the biochar by adopting a KOH method, wherein the BET specific surface area of the activated biochar isnot less than 1200 m<2> / g; and step 5, biochar-soil mixing: mixing the bamboo reed biochar with soil according to a ratio of 1%-5%, adding water after uniform mixing, and enabling the water content of the soil to reach 60% or above.

Description

technical field [0001] The invention relates to the technical field of greenhouse gas emission reduction, in particular to a method for reducing nitrous oxide emission in camellia oleifera forest soil by using reed bamboo biochar. Background technique [0002] Nitrous oxide is one of the most important greenhouse gases in the atmosphere, which mainly comes from the process of nitrification and denitrification of soil. In recent years, more and more studies have shown that in middle- and high-latitude and high-altitude regions, soil nitrous oxide emissions during freeze-thaw periods account for an important proportion of the total annual emissions. In the context of global warming, how to curb this part of the emissions has become a research hotspot in this field. As a new soil amendment, biochar has shown a certain potential in reducing soil nitrous oxide emissions. [0003] The type of tree species in the plantation had a significant impact on the nitrogen dioxide emissio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B09C1/08
CPCB01J20/20B01J20/28066B09C1/08B01J2220/4825
Inventor 马万征王泓李忠芳谢越汪建飞肖新李孝良
Owner ANHUI SCI & TECH UNIV
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