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A method for simultaneously controlling the combined pollution of gasoline and trichlorethylene in groundwater

A technology of trichlorethylene and complex pollution, applied in the restoration of polluted soil, chemical instruments and methods, biological water/sewage treatment, etc.

Active Publication Date: 2016-07-13
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the use of gasoline as a TCE co-metabolite

Method used

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  • A method for simultaneously controlling the combined pollution of gasoline and trichlorethylene in groundwater
  • A method for simultaneously controlling the combined pollution of gasoline and trichlorethylene in groundwater
  • A method for simultaneously controlling the combined pollution of gasoline and trichlorethylene in groundwater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0011] Example: Ralstoniaeutropha study on optimal conditions for co-metabolism degradation of TCE

[0012] Benzene, toluene, phenol, 93 # Gasoline was used as a co-metabolized substrate, the concentration ratio of substrate to TCE was adjusted, different inorganic salt medium, pH value and salinity were optimized, and the residual rate of TCE degradation was determined.

[0013] Depend on figure 1 It can be seen that when the co-metabolized substrate is gasoline, the degradation effect of TCE is significantly better than when the co-metabolized substrate is benzene, toluene, and phenol, and the residual rate of TCE is the lowest.

[0014] When benzene, toluene, and phenol were used as co-metabolized substrates, the maximum degradation rate of TCE occurred at a substrate concentration of 500 mg / L; while gasoline was used as a co-metabolized substrate, the maximum degradation rate of TCE occurred at a substrate concentration of 10 mg / L. This is because, in the degradation p...

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Abstract

The invention discloses a method used for simultaneous abatement of gasoline and trichloroethylene (TCE) combined pollution of underground water, and belongs to the field of environmental organic pollutant biological treatment technology. TCE is an organic pollutant widely distributed in soil and underground water, and can be transformed into nontoxic end products via aerobic biodegradation, but co-metabolism substrates are needed by aerobic biodegradation of TCE. According to the method, gasoline is taken as a substrate, Ralstonia eutropha is selected as an active degradation strain, and researches on aerobic co-metabolism degradation of TCE in underground water are performed for the first time. Conditions such as the co-metabolism substrate, concentration ratio of the co-metabolism substrate to TCE, inorganic salt culture medium, pH value, and salinity are optimized, and optimum degradation conditions are determined. The degradation ratio of TCE can reach 49% when TCE concentration of water is 1mg / l, gasoline concentration is adjusted to be 10mg / l, pH value is 5, and after 72h of degradation. Gasoline and trichloroethylene are common pollutants of underground water, so that the method is capable of providing novel ideas and methods for processing underground water polluted by both gasoline and TCE.

Description

technical field [0001] The invention belongs to the technical field of biological treatment of environmental organic pollutants, in particular to the application of a strain of bacteria using gasoline as a growth substrate to co-metabolize and degrade trichlorethylene in biological treatment of polluted groundwater and restoration of environmental pollution. technical background [0002] Trichlorethylene (trichloroethylene, TCE) is a kind of widely used chlorinated organic solvent, can be used as cleaning agent, degreasing agent, extraction agent etc.; In addition, TCE is also used as insecticide, railway, automobile, food processing, textile, It is widely used as the raw material of medicine and organic chemical industry. With the rapid development of modern industry, trichlorethylene has caused serious pollution to the environment, seriously affecting the ecological balance and human health. Animal experiments have shown that TCE has three effects; epidemiological investi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34B09C1/10
Inventor 孙红文李岩王翠苹姚天琦
Owner NANKAI UNIV
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