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Method for exogenous additive-ball milling mechanochemical degrading of 2, 4-dichlorophen

A mechanochemical method and additive technology, which can be used in the restoration of polluted soil and grain treatment, etc., can solve the problems of long ball milling time, and achieve the effect of reducing energy consumption and shortening ball milling time.

Inactive Publication Date: 2018-05-22
江苏南京地质工程勘察院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the ball mill mechanochemical method degrades high-concentration organochlorine polluted soil for a long time. Taking 2,4-dichlorophenol polluted soil as the degradation object, the degradation effect of exogenous additives on the ball mill mechanochemical method is investigated. Optimization Experimental Research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Effect of Calcium Oxide on the Degradation of 2,4-Dichlorophenol

[0031] Weigh 50g of soil and 0.5g of 2,4-dichlorophenol into a ball mill jar, and put in balls of different sizes according to the ball-to-material ratio of 4:1, that is, 3 balls with a diameter of 20mm, 20 balls with a diameter of 10mm, and 20 balls with a diameter of 5mm 40 grinding balls. 5 g of calcium oxide was added as an exogenous additive. The ball mill is set at a speed of 400r / min, ball milled to the predetermined time (0.5h, 1h, 1.5h, 2h, 2.5h, 3h, 3.5h, 4h), sampling and analysis, according to the specific steps (3) and (4) to carry out the experiment . With the increase of ball milling time, the degradation rate of 2,4-dichlorophenol also increased, and the highest rate reached about 84% when CaO was added; when the ball milling time was 0.5h, the degradation rate of 2,4-dichlorophenol added with CaO reached 75%. %, while the degradation rate of 2,4-dichlorophenol without adding CaO was l...

Embodiment 2

[0033] Effect of Aluminum Oxide on the Degradation of 2,4-Dichlorophenol

[0034] Weigh 50g of soil and 0.5g of 2,4-dichlorophenol into a ball mill jar, and put in balls of different sizes according to the ball-to-material ratio of 4:1, that is, 3 balls with a diameter of 20mm, 20 balls with a diameter of 10mm, and 20 balls with a diameter of 5mm 40 grinding balls. 5 g of alumina was added as an exogenous additive. The ball mill is set at a speed of 400r / min, ball milled to the predetermined time (0.5h, 1h, 1.5h, 2h, 2.5h, 3h, 3.5h, 4h), sampling and analysis, according to the specific steps (3) and (4) to carry out the experiment . The degradation effect of adding alumina is better than that of not adding alumina. The degradation rate of adding alumina reaches 68% when ball milling for 0.5h, while the degradation rate of not adding alumina is only about 5%. With the increase of ball milling time, The degradation rate of adding alumina reaches more than 70%, and without add...

Embodiment 3

[0036] Effect of Birnessite on the Degradation of 2,4-Dichlorophenol

[0037] Weigh 50g of soil and 0.5g of 2,4-dichlorophenol into a ball mill jar, and put in balls of different sizes according to the ball-to-material ratio of 4:1, that is, 3 balls with a diameter of 20mm, 20 balls with a diameter of 10mm, and 20 balls with a diameter of 5mm 40 grinding balls. 5 g of birnessite was added as an exogenous additive. The ball mill is set at a speed of 400r / min, ball milled to the predetermined time (0.5h, 1h, 1.5h, 2h, 2.5h, 3h, 3.5h, 4h), sampling and analysis, according to the specific steps (3) and (4) to carry out the experiment . When ball milling for 0.5h, the degradation rate of adding birnessite reached 75%, while that without adding birnessite was about 5%. With the increase of ball milling time, after 1h, adding 2,4% of birnessite - The degradation rate of dichlorophenol is reduced, and new chlorinated compounds may be produced. The degradation rate of no added birn...

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Abstract

The invention provides a method for exogenous additive-ball milling mechanochemical degrading of 2, 4-dichlorophen, and belongs to the application field of soil remediation. The method for exogenous additive-ball milling mechanochemical degrading of the 2, 4-dichlorophen comprises the following steps that soil containing the 2, 4-dichlorophen is placed in a ball milling tank, wherein the concentration of the 2, 4-dichlorophen in the soil is 1wt.%; milling balls with different sizes are placed into the ball milling tank according to the ratio of 4:1 of the milling balls to the soil, and different exogenous additives are added, wherein the ratio of the exogenous additives to the soil is 1:10; and a ball mill carries out ball milling at a set rotating speed of 400 r / min for a preset time, andthus the 2, 4-dichlorophen is degraded. According to the method for exogenous additive-ball milling mechanochemical degrading of the 2, 4-dichlorophen, by adding different exogenous additives into the milling balls, the ball milling time can be shortened, and energy consumption is reduced.

Description

technical field [0001] The invention belongs to the application field of soil restoration, and in particular relates to a method for experimental research on the degradation of 2,4-dichlorophenol by exogenous additive-ball milling mechanochemical method. Background technique [0002] 2,4-Dichlorophenol is a white solid with a phenolic odor, and is mostly used in the manufacture of fenfen. my country is a large agricultural country, and herbicides are used in large quantities in order to increase production, which has led to the construction of a large number of chemical plants for the production of herbicides, and also brought about the problem of 2,4-dichlorophenol soil pollution. Since the beginning of the 21st century, with the strengthening of people's awareness of environmental protection and the advancement of social science and technology, a large number of chemical plants have been closed, but the problem of soil pollution left by them has not been resolved. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B02C17/10B02C17/20B02C23/06
CPCB02C17/10B02C17/20B02C23/06B09C1/08
Inventor 徐成华陈冬田开洋王振祥张文艺
Owner 江苏南京地质工程勘察院
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