Trichloroethylene removal from groundwater

Table Vm. Comparison of First-Order Rate Constants for Removal of Trichloroethylene (TCE) from Groundwater...

The removal of perchloroethylene solvents such as the very toxic trichloroethylene (TCE) from soil and water is a rather difficult problem [331]. A bench-scale study was conducted in TCE-contaminated sand columns. The following operation was tested. Foam obtained using the anionic surfactant Steol CS-330 was injected in a pulsed operation, after which artificial groundwater followed, and then foam again. The result was 75% of the initial TCE content. After the TCE-degrading bacterial strain ENV 435 had been added with the second pulse of foam, the result of the treatment was 95-99%. 

Example 5.3 One of the most important applications of stripping tower is the purification of both groundwater and industrial water from upstream chemical processes to produce clean water that may be safely discarded into natural water sources. An example of such a process is the removal of the volatile organic compounds dichloroethane, trichloroethylene, and trichloroethane from groundwater by stripping with air. Environmental agencies have specified that for safe disposal to the environment, the concentrations of (1) dichloroethane, (2) trichloroethylene, and (3) trichloroethane should not exceed 0.005 ppm by mass (each), corresponding to molar... 

Effect of Air Sparging Rate on Removal of Trichloroethylene from Groundwater Using Sonication [20 kHz, 35.8 W/cm2 C 50 mg/L]... 

The results of the EPA SITE demonstration also showed that the cost of methane necessary to support trichloroethylene biodegradation is not excessive in relation to the costs of other technologies available for the removal of trichloroethylene from water. Thus, the Biotrol system may prove to be a cost-effective alternative to more traditional groundwater remediation technologies. 

CESAR was developed to address the problem of locating, characterizing, and removing dense non-aqueous-phase liquids (DNAPLs) from contaminated aquifer systems. The process is particularly suited to remediating groundwater contaminated with chlorinated solvents, such as trichloroethylene (TCE), tetrachloroethene (PCE), trichloroethane (TCE), and carbon tetrachloride (CCE). According to the vendor, CESAR can also be applied to sites contaminated with creosote, polychlorinated biphenyls (PCBs), Freon 113, volatile organic compounds (VOCs),... 

In situ thermal extraction is a process for the removal of volatile and semivolatile organic compounds (VOCs and SVOCs) from contaminated soils and groundwater. The process primarily treats chlorinated solvents such as trichloroethylene (TCE), tetraehloroethylene (PCE), and dichlorobenzene hydrocarbons such as gasoline, diesel, and jet fuel and mixtures of these compounds. 

Wilson BH, Pogue DW. 1987. Biological removal of trichloroethylene from contaminated groundwater. Presented before the Division of Environmental Chemistry, American Chemical Society, New Orleans, LA, Aug. SO Sept. 4, 1987. Preprint Extended Abstract 194 628-631. 

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