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Treating method for halogenated organic solid pollutants

A technology of organic solids and treatment methods, applied in the direction of solid waste removal, etc., can solve the problems of weakening the effect of halogenated organic pollutants, difficult to achieve deep dehalogenation, and difficult to remove halogenated groups, etc.

Active Publication Date: 2015-09-16
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aerobic biological oxidation method can only be used for the hydroxylation or methylation ring-opening degradation of low-halogenated organic compounds, but it is difficult to remove the halogenated groups; the anaerobic biological reduction method is generally suitable for the reductive dehalogenation of high-halogenated organic compounds, but Difficult to achieve deep dehalogenation
Due to the great randomness and uncertainty in the screening and cultivation of bacterial strains, this also brings great difficulties to the practical application of this method.
When these treatment technologies are used alone, the coexisting solid environmental medium will not only prevent the contact of halogenated organic pollutants with reactive species, but also shield the light absorption of photoactive substances (such as photocatalysts), prevent the generation of excited molecules and Energy transfer, which will undoubtedly seriously weaken the effect of the above-mentioned method for dealing with halogenated organic pollutants

Method used

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  • Treating method for halogenated organic solid pollutants
  • Treating method for halogenated organic solid pollutants
  • Treating method for halogenated organic solid pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Mix potassium persulfate and decabromodiphenyl ether solid powder in a mortar according to the material molar ratio of 50:1, and transfer them to a 250mL stainless steel ball mill jar. Then add 4 large grinding balls and 16 small grinding balls in the ball mill jar. Each large grinding ball weighs 32g and has a diameter of 20mm; the weight of the large grinding ball is 4g and has a diameter of 10mm. The weight of the ball mill jar is 3.5kg, the inner depth of the jar body is 65cm, and the inner diameter is 75cm. Both the ball mill pot and the ball mill are made of stainless steel, and the space between the ball mill pot and the ball mill cover is sealed with an elastic gasket.

[0027] Step 2: Set the rotating speed of the ball mill to 400rpm, perform the grinding process under the condition of normal temperature and pressure, and change the rotation direction of the ball mill every 15 minutes during the grinding. The ball milling reaction was carried out to 1...

Embodiment 2

[0029] Repeat Example 1 by the same steps as described, but the persulfate used in step one is ammonium persulfate.

Embodiment 3

[0031] Repeat Example 1 by the same steps as described, but the persulfate used in step one is sodium persulfate.

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Abstract

The invention discloses a treating method for halogenated organic solid pollutants. The treating method comprises the following steps: mixing persulfate with the halogenated organic solid pollutants and adding the obtained mixture into a ball milling tank; and carrying out grinding by using a plurality of grinding balls with different diameters at normal temperature and normal pressure. According to the invention, the halogenated organic solid pollutants can be fully and effectively degraded at normal temperature and normal pressure through oxidation effect of free sulfate radicals on the halogenated organic solid pollutants, and degradation rates of decabromodiphenyl ether, phenyl-hexachloride and tetrabromobisphenol A all exceeds 85%.

Description

technical field [0001] The invention belongs to the field of solid waste treatment of organic pollutants, and more specifically relates to a treatment method for halogenated organic solid pollutants. Background technique [0002] Halogenated organic compounds mainly include perfluorinated compounds, organochlorine pesticides (such as hexachlorobenzene, DDT, etc.), polychlorinated biphenyls and brominated flame retardants. They are widely used in various fields of industrial products. For example, perfluorinated compounds with hydrophobic and oleophobic properties can be used to synthesize preservatives, surfactants, foam fire extinguishing agents, cosmetics, etc.; It is used as heat carrier, insulating oil and lubricating oil, etc.; brominated flame retardant is one of the organic flame retardants with the largest output, the highest flame retardant efficiency and the widest application in the world. It is mainly used in electronic products, construction materials, textiles ...

Claims

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Application Information

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IPC IPC(8): B09B3/00
Inventor 王楠朱丽华黄爱珍柴慧娟唐和清
Owner HUAZHONG UNIV OF SCI & TECH
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