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Method for controlling atmospheric emission loss of fumigant on basis of animal dung biochar

A technology of animal feces and biochar, applied in botany equipment and methods, plant protection, horticulture, etc., can solve the problems of air pollution by fumigants, harm to human body, secondary pollution, etc., to reduce the risk of secondary pollution, The effect of solving the dust risk and increasing the contact time

Active Publication Date: 2016-07-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has the following disadvantages: first, the biochar powder covered on the soil surface is easily lifted by the wind, forming dust to pollute the air and endanger human health; second, the fumigant is only controlled by biochar adsorption. Part of the fumigant adsorbed on the biochar has the risk of desorption and still pollutes the environment; the fumigant that has not desorbed makes the biochar itself a pollutant, causing secondary pollution
In short, this technology only delays the emission of fumigants into the atmosphere to a certain extent, and does not fundamentally solve the problem of air pollution caused by fumigants

Method used

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  • Method for controlling atmospheric emission loss of fumigant on basis of animal dung biochar
  • Method for controlling atmospheric emission loss of fumigant on basis of animal dung biochar
  • Method for controlling atmospheric emission loss of fumigant on basis of animal dung biochar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Cow dung biochar obtained by pyrolysis at 300°C is mixed at 200 / min at a mass ratio of biochar: water = 1:3 for 2 hours to obtain activated biochar, and it is covered on the soil surface and added 1-3cm Thick, 1,3-dichloropropene was applied to the soil by the injection method commonly used in agriculture, and the control experiment was unactivated cow dung biochar obtained by pyrolysis at 300 °C. Determination of the degradation rate of 1,3-dichloropropene in biochar. The results are shown in Table 1.

[0033] Table 1

[0034] deal with

Embodiment 2

[0036] Cow dung biochar obtained by thermal cracking at 400°C is mixed at 200 / min for 2 hours at a ratio of mass ratio biochar: water = 1:3 to obtain activated biochar, and cover the soil surface with 1-3 cm Thick, 1,3-dichloropropene was applied to the soil by the injection method commonly used in agriculture, and the control experiment was unactivated cow dung biochar obtained by pyrolysis at 400 °C. Determination of the degradation rate of 1,3-dichloropropene in biochar. The results are shown in Table 2.

[0037] Table 2

[0038] deal with

Embodiment 3

[0040] Cow dung biochar obtained by pyrolysis at 500°C is mixed at 200 / min for 2 hours at a mass ratio of biochar: water = 1:3 to obtain activated biochar, and it is covered on the soil surface and added 1-3cm Thick, 1,3-dichloropropene was applied to the soil by the injection method commonly used in agriculture, and the control experiment was unactivated cow dung biochar obtained by pyrolysis at 500 °C. Determination of the degradation rate of 1,3-dichloropropene in biochar. The results are shown in Table 3.

[0041] table 3

[0042] deal with

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Abstract

The invention discloses a method for controlling the atmospheric emission loss of a fumigant on the basis of animal dung biochar in the field of environmental protection.The method particularly comprises the steps that the soil surface is covered with activated biochar, and then the fumigant is applied.According to the method, the soil surface is covered with the activated animal dung biochar before the fumigant is applied; by means of nucleophilic substitution and electron transfer mechanisms, the animal dung biochar can enable the fumigant adsorbed on surface of the biochar to be degraded, the animal dung biochar itself can serve as manure, and the risk of secondary pollution does not exist.The animal dung biochar has a strong catalytic degradation effect on the fumigant, and the problem that the fumigant volatilizes to the atmosphere can be essentially solved.

Description

technical field [0001] The invention relates to the field of environmental protection, and relates to a method for controlling the loss of fumigants in the atmosphere based on animal feces biochar, and more specifically, to a method for reducing fumigants to the atmosphere through nucleophilic substitution and electron transfer of animal feces biochar. The method of distributing losses in . Background technique [0002] In agricultural production practice, soil fumigants play a key role in increasing the yield of many high-value vegetable and fruit crops. Methyl bromide, the most widely used fumigant, was completely phased out in developing countries in 2015 according to the Copenhagen Amendment to the Montreal Protocol due to ozone depletion. Currently commonly used substitutes for methyl bromide include 1,3-dichloropropene, chloropicrin, methyl isothiocyanate, daniron, metabam, and methyl iodide. These fumigant products that replace methyl bromide are still volatile and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G13/00A62D3/00A62D101/04
CPCA01G13/00A62D3/00A62D2101/04
Inventor 秦娇龙沈国清严丽丽孙明星孙鹏
Owner SHANGHAI JIAO TONG UNIV
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