Simulated remediation system and method for underground water containing 1, 2-dichloroethane, nitrate and sulfate

A dichloroethane and sulfate technology, which is applied in the field of simulated repair systems, can solve the problems of unsatisfactory application effects of chemical repair methods and repair systems, poor system operation stability, and high pH requirements of the reaction system.

Active Publication Date: 2020-11-20
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide a simulated repair system and method for groundwater containing 1,2-dichloroethane, nitrate and sulfate, so as to solve the unsatisfa

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  • Simulated remediation system and method for underground water containing 1, 2-dichloroethane, nitrate and sulfate
  • Simulated remediation system and method for underground water containing 1, 2-dichloroethane, nitrate and sulfate
  • Simulated remediation system and method for underground water containing 1, 2-dichloroethane, nitrate and sulfate

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[0060] Below in conjunction with embodiment the present invention is described in further detail, and following embodiment is only as illustration, does not limit the present invention in any way.

[0061] 1,2-Dichloroethane (1,2-Dichloroethane) is a colorless transparent oily liquid with a chloroform-like odor, and is a relatively simple volatile chlorinated organic pollutant in groundwater; 1,2 -Dichloroethane has a density of 1.253g / mL, a relative vapor density (air=1) of 3.35, a solubility of 8.7g / L, a boiling point of 83.5°C, and a vapor pressure of 12mmHg (25°C); it is slightly soluble in water and can be mixed with ethanol and chloroform , Miscible with ether. Due to its good physical and chemical properties, 1,2-dichloroethane has been widely used in the fields of industry, agriculture and life, so it is a relatively common volatile and highly toxic chlorinated hydrocarbon organic compound in groundwater. DNAPL represents one of the pollutants.

[0062] Nitrate is a ...

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Abstract

The invention provides a simulated remediation system and a method for underground water containing 1, 2-dichloroethane, nitrate and sulfate. According to the system, a rectangular tank-type shell with an opening in the top is sequentially divided into a pollution source section, a pollutant migration and transformation section and a pollutant remediation section from left to right; a sample spacelayer of the pollutant remediation section is filled with a denitrified material filling layer which is filled with a mixture of tourmaline, pyrite, quartz sand and sulfur autotrophic denitrifying bacteria, an oxide material filling layer which is filled with a mixture of persulfate, tourmaline, pyrite and quartz sand, and a desulfurized material filling layer which is filled with a mixture of tourmaline, quartz sand and sulfate reducing bacteria from left to right in sequence. The pH value and oxidation-reduction potential of the aquifer are optimized, the oxidability of a Fenton-like systemin underground water and the activity of denitrifying bacteria and sulfate reducing bacteria are integrally improved, and the effectiveness and practicability of a biological remediation system and achemical oxidation system in industrial polluted underground water remediation are obviously improved.

Description

technical field [0001] The invention relates to the technical field of contaminated groundwater treatment, in particular to a simulated restoration system and method for groundwater containing 1,2-dichloroethane, nitrate and sulfate. Background technique [0002] Groundwater is a major participant in the hydrological cycle, and is extremely important for urban and rural water supply systems in developing countries. It is an important source of water supply systems and a major source of regionally dispersed water supply systems. Rapid population growth, coupled with weak awareness of environmental protection, resulting in substandard discharge of sewage, excessive application of pesticides and fertilizers, and unreasonable landfills of garbage, etc., lead to complex pollution of groundwater, especially 1,2-dichloroethane, nitrate And and sulfate lead to more prominent groundwater pollution: 1,2-dichloroethane (1,2-Dichloroethane) is a volatile and highly toxic chlorinated hyd...

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Application Information

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IPC IPC(8): C02F3/34C02F1/72G01N33/18C02F103/06C02F101/16C02F101/36C02F101/10
CPCC02F3/34C02F1/722G01N33/18C02F2103/06C02F2101/163C02F2101/36C02F2209/06C02F2101/101C02F2203/006C02F2305/026Y02W10/10
Inventor 崔海炜周小元刘广联
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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