Eluting process for ectopic polluted soil
A contaminated soil and process technology, applied in the field of ectopic contaminated soil elution process, can solve the problems of long disposal time, high cost, and difficulty in quickly repairing soil, etc., and achieve low repair cost, short time, fast and efficient repair treatment Effect
Inactive Publication Date: 2017-06-13
深圳市中禾环保工程有限公司
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Problems solved by technology
[0003] Currently, remediation methods for contaminated soil include bioremediation, electrokinetic remediation, safe landfill, immobilization / stabilization, etc., but these methods have their own limitations: such as the high cost of immobilization / stabilization ; The electrokinetic remediation method has strict requirements on soil conditions and is only suitable for the treatment of small areas of pollution; the bioremediation method includes phytoremediation and microbial remediation. The restoration method also has the problem of subsequent treatment of plants
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0012] The present invention will be further described below by specific examples.
[0013] Project Background: It is located in an organochlorine pesticide factory, which has a production history of more than 40 years. After the closure, the land is planned to be used for urban construction.
[0014] Project scale: 1000m 3 .
[0015] Main pollutants and pollution degree: The main pollutants are hexachlorocyclohexane and bis-p-chlorophenyltrichloroethane, the concentrations are: 4.52-46.4mg / kg; 9.81-33.2mg / kg.
[0016] Physical and chemical characteristics of pollution: All belong to organochlorine pesticides with strong hydrophobicity and low solubility. They persist in the environment and are difficult to degrade through biological and chemical means.
[0017] Process flow:
[0018] S1. Use an excavator to transfer the polluted soil from the polluted area to the stacking area, crush the polluted soil with an excavating crusher, and load the crushed soil material into the ...
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Abstract
An eluting process for ectopic polluted soil comprises the following steps of A pretreatment and screening of the polluted soil, B cleaning treatment of screened materials, C fine grain screening, D screened fine grain treating, E screened clay treating and F solid-liquid separation. The polluted soil is crushed and screened, screened soil particles of various different particle sizes are cleaned specifically. In particular, clay with the particle diameter being smaller than 0.75mm is subjected to eluting cleaning in a synergistic eluting device by adding synergistic agents. Pollutants of the soil can be effectively removed through cleaning. Fast and efficient repairing treatment can be conducted on the polluted soil. The repairing cost is low, and the time is short.
Description
technical field [0001] The invention relates to the technical field of soil pollution treatment, in particular to an elution process of heterotopically polluted soil. Background technique [0002] Due to various production activities of human beings, the degree of pollution to the ecological environment is increasing day by day, among which the pollution of soil has become a serious problem that cannot be ignored. The main cause of soil pollution is that heavy metals, semi-volatile and non-volatile organic compounds produced in human industrial activities are enriched on the soil surface, which have the characteristics of long residual time, strong concealment, and high toxicity, and cannot be degraded by microorganisms. It begins to accumulate and threatens human health through dust exposure or food chain transmission. It has been found through research that soil pollutants are mainly concentrated in small clay particles (soil particles with a particle size less than 0.75mm...
Claims
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IPC IPC(8): B09C1/02
CPCB09C1/02
Inventor 曹平
Owner 深圳市中禾环保工程有限公司