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

A dichloroethane and groundwater technology, applied in chemical instruments and methods, contaminated groundwater/leachate treatment, water pollutants, etc., can solve the high pH requirements of the reaction system, poor system operation stability, and chemical oxidation repair methods and repair system application effects are not ideal, to achieve the effect of low ecological environment risk, high safety, and optimized repair process

Inactive 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, to solve the unsatisfactory application effect of the existing chemical oxidation repair method and repair system, the poor stability of the system operation, and the impact on the pH of the reaction system. more demanding questions

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

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[0050] 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.

[0051]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.

[0052] Pyrite, also k...

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Abstract

The invention provides a simulated remediation system and a method for underground water containing 1, 2-dichloroethane. 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; the sample space layers of the pollution source section and the pollutant migration and transformation section are soil sample filling layers; the sample space layer of the pollutant remediation section is sequentially provided with apyrite filling layer, an oxide filling layer and a tourmaline filling layer from left to right. Pyrite is adopted to catalyze persulfate; the natural material tourmaline is introduced into the Fenton-like reaction, so that the pH value and redox potential of the aquifer are optimized, the remediation environment of persulfate in underground water on 1, 2-dichloroethane is integrally improved, andthe effectiveness and practicability of an in-situ chemical oxidation system in remediation of degradation-resistant organic polluted underground water 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. Background technique [0002] Volatile chlorinated hydrocarbons (CAHs) are a class of artificially synthesized organic compounds with special odors, which have strong toxic effects on the liver, kidney, cardiovascular and gastrointestinal organs of the human body. Chlorinated hydrocarbons are often used as solvents in industrial production or as intermediate products of chemical processes. Due to leakage and improper disposal, chlorinated hydrocarbons are often detected in the environment. Among the 129 priority pollutants in the United States and the 58 organic substances in China's environmental priority monitoring and control, 1,2-dichloroethane is at the forefront. [0003] 1,2-Dichloroethane (1,2-Dichloroethane) is a volatile and highly toxic chlorinated hydro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F101/36C02F103/06
CPCC02F9/00C02F1/30C02F1/72C02F1/722C02F1/66C02F2101/36C02F2103/06C02F1/481
Inventor 崔海炜陈玺向小平黄冠星侯钦宣
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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