Remediation method of soil polluted by polybrominated diphenyl ethers

A technology for polybrominated diphenyl ethers and contaminated soil, which is applied in the field of remediation of polybrominated diphenyl ether-contaminated soils, can solve problems such as difficulty in achieving treatment effects, slow photodegradation reaction rate, and increased treatment costs, and achieve improved treatment effects and time, efficient treatment, easy to focus effect

Inactive Publication Date: 2014-03-12
福建沃土环保集团有限公司
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Problems solved by technology

[0003] At present, the research on PBDEs mainly focuses on photodegradation and biological treatment, but the photodegradation reaction rate is relatively slow, such as using ultraviolet light as a light source will increase the processing cost, which is not suitable for For engineering applications, the photolysis process will also generate polybrominated dibenzofurans (PBDFs) dioxin-like highly toxic carcinogens
At the same time, PBDEs has toxicity and inhibitory effect on microorganisms, and it takes a long time to rely on biological degradation alone, and it is difficult to achieve a good treatment effect. Therefore, it is important to develop an environmentally friendly and efficient repair treatment method and matching equipment. significance

Method used

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  • Remediation method of soil polluted by polybrominated diphenyl ethers

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] Such as figure 1 As shown, the contaminated soil is excavated with an excavator and poured into the air-dense medium fluidized bed dry separator. Under the action of pressurized air flow, a uniform and stable gas-solid fluidized suspension with a certain density is formed. The heavier Stones and branches sink in it; lighter paper scraps, plastic bags, etc. float in it, and the stratified materials are discharged from the bed in reverse by the scraper conveying device, and the soil after de-intermediation enters the PC through the conveyor belt. Hammer crusher crushed, so that the particle size of the contaminated soil is 10mm. The crushed polluted soil passes through the drum sieve, and the under-sieve is ground by a ball mill. The polluted soil that does not pass through the sieve is crushed and then sieved to obtain polluted soil part...

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Abstract

The invention discloses a remediation method of soil polluted by polybrominated diphenyl ethers. The method is composed of three parts of pretreatment, sequencing batch repair and drying, and used for performing innocent treatment on polluted soil. According to the remediation method disclosed by the invention, a sequencing batch polluted soil remediation device is integrated with the functions of pollutant enrichment, degradation and so on; in the meantime, compared with other methods, the method has the advantages in a plurality of aspects such as simple operation, convenience in mounting, low economic cost and environmental friendliness; therefore, the method is applicable to engineering application, and has a good application prospect in the remediation aspect of soil polluted by the polybrominated diphenyl ethers in an electronic waste recovery yard and the like.

Description

technical field [0001] The invention belongs to the technical field of treatment of halogenated aromatic hydrocarbon organic pollutants for environmental protection, and relates to a method for repairing polybrominated diphenyl ether-contaminated soil. Background technique [0002] Polybrominated Diphenyl Ethers (PBDEs) are an important class of brominated flame retardants, which are widely used in various industrial products and daily products. It has the characteristics of environmental persistence, long-distance transmission, bioaccumulation, and toxic effects on organisms and humans. Its health hazards have increasingly become a global environmental pollution problem. The global annual consumption exceeds 67,000 tons. Since the ages, PBDEs have not only been detected in a variety of environmental samples, but the content in human samples has also increased by 100 times in an exponential manner. In recent years, soil polluted by high concentrations of PBDEs has been fou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
Inventor 解清杰叶丹蒋志辉姚一凡袁广娇黄晓龙周清时
Owner 福建沃土环保集团有限公司
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