Remediation method of trichloroethylene-polluted underwater

Abstract

The invention discloses a remediation method of trichloroethylene-polluted underwater, and belongs to the field of remediation of underwater subjected to organic pollution. The remediation method of the trichloroethylene-polluted underwater comprises the following steps of (1) measuring the content of trichloroethylene in the trichloroethylene-polluted underwater, and accounting the total volume of the polluted underwater; (2) producing a remediation agent A aqueous solution; (3) producing a remediation agent B aqueous solution; (4) dividing the remediation agent A aqueous solution and the remediation agent B aqueous solution into 3-10 parts separately and equally; (5) forming an injection well and a pumping well in a pollution source area of the trichloroethylene-polluted underwater, carrying out a reaction for 12-36 h, meanwhile, pumping the trichloroethylene-polluted underwater out of the pumping well, and reinjecting the trichloroethylene-polluted underwater to the injection well;(6) after the reaction in the step (5) is completed, collecting underwater through the pumping well or a monitoring well, detecting a trichloroethylene concentration, and recording data; and (7) whenthe trichloroethylene concentration is higher than a remediation target, repeating the step (4) to the step (6), wherein when the pollutant concentration is lower than the remediation target, remediation work is completed.

Description

technical field [0001] The invention belongs to the field of remediation of organic polluted ground water, and mainly relates to a remediation method of ground water polluted by trichlorethylene. Background technique [0002] Trichlorethylene is often used as a metal degreasing agent, fungicide , refrigerant and clothing dry cleaning agent , the annual usage is huge and increasing year by year. Due to the improper treatment of the waste liquid after the use of TCE and the leakage of some storage tanks, TCE pollution occurs from time to time, seriously polluting the soil and groundwater, and becoming one of the most widely distributed pollutants in the current environment. Trichlorethylene is a toxic substance, volatile and has "three effects", that is, carcinogenic, teratogenic, and mutagenic. In recent years, a large number of studies have shown that they can cause trigeminal nerve palsy and other diseases, and are currently listed as a suspected human carcinogen. Ther...

AI Technical Summary

Problems solved by technology

[0003] Trichlorethylene has the characteristics of low viscosity and strong fluidity. Once it enters the environment, it will cause soil and groundwater pollution and increase the difficulty of restoration.

And after calcium peroxide is added, calcium hydroxide continues to be produced as calcium peroxide continues to dissolve, and nitric acid must be continuously added to maintain a neutral and slightly acidic underground environment. The process is cumbersome and the optimum pH condition is difficult to control. Ineffective and even a limiting step for in situ chemical restoration