Method for degrading nitrochlorbenzenes pollution in soil

A nitrobenzene, fluorine and chlorine technology, applied in the field of soil remediation, can solve the problems of low utilization rate of hydrogen peroxide, low activation efficiency of persulfate, etc., achieve significant oxidation efficiency, increase specific surface area and active sites, and apply scope. wide effect

Active Publication Date: 2018-08-03
SOUTHEAST UNIV
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Problems solved by technology

[0008] In view of the technical problems in the prior art that fluorochloronitrobenzene is difficult to be directly oxidized, the utilization rate of hydrogen peroxide is low, and the activation efficiency of persulfate is low, the

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  • Method for degrading nitrochlorbenzenes pollution in soil
  • Method for degrading nitrochlorbenzenes pollution in soil
  • Method for degrading nitrochlorbenzenes pollution in soil

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[0028] The present invention will be further described below in conjunction with examples, and the specific parameters can be adjusted according to the actual site. The reagents or instruments used are not indicated by the manufacturer, and they are all regarded as conventional products that can be purchased through the market.

[0029] Air-dry and sieve the soil first, then add 2.5%-8.5% activated carbon-loaded nanometer zero-valent iron to the soil polluted by fluorochloronitrobenzene, let it stand, and then add relative In the persulfate solution with a soil quality of 0.5mol / kg-1.5mol / kg, react on a constant temperature air bath shaker at 25°C for 12 hours, and then add in batches relative to the soil quality of 0.5mol / kg-1.5mol / kg Hydrogen peroxide solution, keep the reaction, the final contaminated soil mass and solution volume ratio is 1:0.5~3; the reaction time is 3-7 days, samples are taken from the soil in different time periods, and are determined by gas chromatogra...

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Abstract

The invention discloses a method for degrading nitrochlorbenzenes pollution in soil and belongs to the field of soil restoration. According to the method, polluted soil and activated carbon supportednanometer zero-valent iron are mixed uniformly; then a persulfate solution is added in; then hydrogen peroxide is added in batches; and after uniform stirring, standing at a dark place is performed, and after a reaction ends, the nitrochlorbenzenes pollution in soil can be eliminated. By means of the method, nitrochlorobenzene, 3,5-dichloro-4-fluoronitrobenzene and the like can be effectively removed, and the beneficial effects that a reaction system generates free radicals high in oxidizing capacity, the reaction system is stable, the applicable pH range is wide and the oxidizing agent utilizing efficiency is high are achieved; and meanwhile, the procedure is simple, industrialization can be achieved easily, and the method is suitable for using and popularizing.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a method for degrading fluorochloronitrobenzene pollution in soil. Background technique [0002] Nitrochlorbenzenes are important chemical raw materials and intermediates, widely used in rubber manufacturing, pesticides, medicines, dyes, synthetic materials and wood preservation and other fields. As an organic pollutant, although its content in nature is very small, due to the wanton discharge of industrial, agricultural and domestic wastewater, and fluorochloronitrobenzene has long-term, hidden, fat-soluble and difficult to be completely degraded Therefore, it is easy to accumulate in the environment and cause serious pollution to water and soil, which has increasingly attracted people's attention. [0003] At present, the common methods of oxidative removal and repair of soil organic pollutants are mostly Fenton or Fenton-like methods. However, Fenton oxid...

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Application Information

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IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 宋敏赵炎曹青青王水
Owner SOUTHEAST UNIV
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