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Method for degrading endosulfan by mechanochemical method

A mechanochemical method and endosulfan technology, which is applied in the field of environmental pollution waste treatment, can solve the problems of low degradation efficiency and slow degradation rate of endosulfan, and achieve simple process realization, low operating cost, and reduced energy consumption and operating cost. Effect

Pending Publication Date: 2022-07-29
NORTHEAST NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the degradation of endosulfan through the traditional calcium oxide and iron powder + quartz sand degradation process has the problems of slow degradation rate and low degradation efficiency.

Method used

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  • Method for degrading endosulfan by mechanochemical method
  • Method for degrading endosulfan by mechanochemical method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Under normal temperature and pressure conditions, mix endosulfan pollutants with ball mill additives and place them in the ball mill tank of a planetary high-energy ball mill, add grinding balls into the ball mill tank and seal it, and then fix the loaded ball mill tank in the ball mill. On the above, the ball mill was carried out at a revolution speed of 275 rpm for 2 hours, and after every 30 minutes of continuous operation, it was stopped for 5 minutes to cool down, and the degradation of endosulfan was achieved by a mechanochemical reaction. Among them, the ball-milling additive is zero-valent metal Fe and quartz sand (5.5g, in which the molar ratio of zero-valent metal Fe and quartz sand is 4:1), the endosulfan pollutant is 0.5g, and the mass ratio of ball-milling additive and endosulfan pollutant is is 11:1, the total mass of the sample in the ball milling process is 6g, and the ball-to-material ratio is 30:1.

Embodiment 2

[0029]Under normal temperature and pressure conditions, mix endosulfan pollutants with ball mill additives and place them in the ball mill tank of a planetary high-energy ball mill, add grinding balls into the ball mill tank and seal it, and then fix the loaded ball mill tank in the ball mill. On the above, the ball mill was carried out at a revolution speed of 275 rpm for 2 hours, and after every 30 minutes of continuous operation, it was stopped for 5 minutes to cool down, and the degradation of endosulfan was achieved by a mechanochemical reaction. Among them, the ball-milling additive is calcium oxide (CaO) 5.5g, the endosulfan pollutant is 0.5g, the mass ratio of the ball-milling additive and the endosulfan pollutant is 11:1, the total mass of the sample during the ball-milling process is 6g, and the ball-to-material ratio is 30:1.

Embodiment 3

[0031] Under normal temperature and pressure conditions, mix endosulfan pollutants with ball mill additives and place them in the ball mill tank of a planetary high-energy ball mill, add grinding balls into the ball mill tank and seal it, and then fix the loaded ball mill tank in the ball mill. On the above, the ball mill was carried out at a revolution speed of 275 rpm for 2 hours, and after every 30 minutes of continuous operation, it was stopped for 5 minutes to cool down, and the degradation of endosulfan was achieved by a mechanochemical reaction. Among them, the ball-milling additive is potassium hydroxide (KOH) 5.5g, the endosulfan pollutant is 0.5g, the mass ratio of the ball-milling additive and the endosulfan pollutant is 11:1, the total mass of the sample during the ball-milling process is 6g, and the ball-to-material ratio 30:1.

[0032] Examples 1-3 use different ball mill additives to degrade endosulfan, and the results are as follows figure 1 shown. from figu...

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Abstract

The invention discloses a method for degrading endosulfan by a mechanochemical method, which adopts an additive for degrading endosulfan by the mechanochemical method, which comprises at least one of lithium hydroxide, sodium hydroxide, potassium hydroxide, rubidium hydroxide, cesium hydroxide, magnesium hydroxide and calcium hydroxide, and degrades endosulfan by the mechanochemical method. The method is rapid and harmless, can rapidly and efficiently decompose endosulfan, realizes detoxification and thorough inorganic effects, prevents environmental pollution and reduces the health risk of endosulfan to organisms.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution waste treatment, and relates to a method for degrading endosulfan by a mechanochemical method. Background technique [0002] Endosulfan (C 9 H 6 Cl 6 O 3 S), the chemical name is 1,4,5,6,7,7-hexachloro-9,9,10-trinorborn-5-ene-2,3-ylidenedimethylene, which is a sulfurous acid Esters, there are two isomers, α-endosulfan and β-endosulfan. Aliases are Saidan, Anzadan, and the relative molecular mass is 406.91. The ratio of α-endosulfan to β-endosulfan in technical grade endosulfan is about 7:3. [0003] Endosulfan is a broad-spectrum organochlorine pesticide, which has been widely used in the world since the 1970s due to its good effect and low price. Pure endosulfan is a white crystal that volatilizes into the air with an odor of sulfur dioxide. The content of the two isomers in the technical endosulfan is more than 94%, and the appearance is yellow-brown. The melting point o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/30A62D101/28
CPCA62D3/30A62D2101/28
Inventor 徐莹王海珠
Owner NORTHEAST NORMAL UNIVERSITY
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