Natural attenuation of trichloroethylene in fractured shale bedrock

Hydrogeology and pedology of saprolite formed from sedimentary rock, eastern Tennessee, USA

“…The weathered material overlying the shale and siltstone is typically 1 to 10 m thick and retains a substantial amount of sedimentary layering and structure from the parent bedrock: Hence, it is referred to as saprolite (Dreier et al, 1987;Hatcher et al, 1992;Driese et al, 2001). Field studies in shale or siltstone saprolite at ORR include: pedologic and geologic characterization (Rothschild et al, 1984a,b;Dreier et al, 1987;Dorsch and Katsube, 1999;Driese et al, 2001); measurement of hydraulic properties of the solumn and upper C-horizon (Luxmoore et al, 1981b;Watson and Luxmoore, 1986;Wilson and Luxmoore, 1988;Wilson et al, 1989); lateral flow and transport of solute tracers in the upper 1-2 m of the solumn and saprolite (Wilson et al, 1993); vertical infiltration and solute transport in a 3 m deep undisturbed pedon (Jardine, personal communication); solute or colloid tracer experiments in the saturated zone just above the saprolite-bedrock contact Webster, 1996;Sanford et al, 1996;McKay et al, 1997McKay et al, , 2000; tracer experiments or monitoring of contaminant plumes in the partially weathered rock just below the saprolitebedrock contact (Olsen et al, 1983;Shevenell et al, 1994;McCarthy et al, 1998a,b;Jardine et al, 1999;Lenczewski et al, 2003).…”

Application of a long-lasting colloidal substrate with pH and hydrogen sulfide control capabilities to remediate TCE-contaminated groundwater

“…Figure 10 presents the XRD diffraction pattern for the soils in Lenczewski et al (2003) [76] and Scheutz et al (2011) [77] indicate that methanotrophs, methanogens, iron-reducing bacteria, and sulfate-reducing bacteria could biodegrade TCE under anaerobic conditions. Results…”

Evaluation of Contaminant Concentrations in Wet and Dry Seasons during Pump-and-Treat Pilot Tests

“…With industrial development and the subsequent increasing use of organic solvents in many industrial complexes, unpredicted and uncontrolled discharges of the waste solvents have caused soil and groundwater contamination, which have drawn much attention from the public (Rivett et al, 2001;Lenczewski et al, 2003;Chambers et al, 2004;Kim et al, 2005;Heo et al, 2007;Baek and Lee, 2010). The chlorinated organic solvents most frequently occurring in contaminated soil and groundwater include tetrachloroethylene (PCE), trichloroethylene (TCE), dichloroethylene (DCE), chloroform (CF), carbon tetrachloride (CT), trichloroethane (TCA), and vinyl chloride (VC).…”