Shallow lateral DNAPL migration within slightly dipping limestone, southwestern Kentucky

Jancin, Mark; Ebaugh, Walter F.

doi:10.1016/s0013-7952(01)00121-1

Cited by 8 publications

(2 citation statements)

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“…Lateral migration always takes place along the path of least resistance, i.e., along the dip direction of these lower permeability layers. Lateral DNAPL migration distances of more than 100 m from input locations have been reported by Cohen and Mercer (1993) and by Jancin and Ebaugh (2002). The resultant DNAPL distribution or -architecture‖ of the DNAPL source zone is controlled by subtle geological heterogeneity that is accentuated by decades of DNAPL dissolution due to groundwater flow (Parker et al 2003 andGuilbeault et al 2005).…”

Section: Introductionmentioning

confidence: 78%

Processes controlling the fate of chloroethenes emanating from DNAPL aged sources in river–aquifer contexts

Puigserver

Cortés

Viladevall

et al. 2014

Journal of Contaminant Hydrology

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This work dealt with the physical and biogeochemical processes that favored the natural attenuation of chloroethene plumes of aged sources located close to influent rivers in the presence of co-contaminants, such as nitrate and sulfate. Two working hypotheses were proposed: i) Reductive dechlorination is increased in areas where the river-aquifer relationship results in the groundwater dilution of electron acceptors, the reduction potential of which exceeds that of specific chloroethenes; ii) zones where silts predominate or where textural changes occur are zones in which biodegradation preferentially takes place. A field site on a Quaternary alluvial aquifer at Torelló, Catalonia (Spain) was selected to validate these hypotheses. This aquifer is adjacent to an influent river, and its redox conditions favor reductive dechlorination. The main findings showed that the low concentrations of nitrate and sulfate due to dilution caused by the input of surface water diminish the competition for electrons between microorganisms that reduce co-contaminants and chloroethenes. Under these conditions, the most bioavailable electron acceptors were PCE and metabolites, which meant that their biodegradation was favored. This led to the possibility of devising remediation strategies based on bioenhancing natural attenuation. The artificial recharge with water that is low in nitrates and sulfates may favor dechlorinating microorganisms if the redox conditions in the mixing water are sufficiently maintained as reducing and if there are nutrients, electron donors and carbon sources necessary for these microorganisms.

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Section: Introductionmentioning

confidence: 78%

Processes controlling the fate of chloroethenes emanating from DNAPL aged sources in river–aquifer contexts

Puigserver

Cortés

Viladevall

et al. 2014

Journal of Contaminant Hydrology

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“…Of particular interest for bedrock sites are dense nonaqueous phase liquids (DNAPLs), which often migrate to and into the bedrock. Although, there is a growing body of literature devoted to field evaluations of DNAPLs in fractured sedimentary rock (Parker et al 1994(Parker et al , 1997Jancin and Ebaugh 2002) and laboratory evaluations of nonaqueous phase liquid (NAPL) retention in fractured sedimentary rocks (e.g., Longino and Kueper 1999), to our knowledge, there are scant field data in the published literature on DNAPLs in fractured crystalline rock.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Crystalline Bedrock Contaminated by Dense Nonaqueous Liquid

Cho¹,

Fiacco²,

Daly³

2008

Groundwater Monitoring Rem

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A systematic hydrogeologic site characterization has been completed in a fractured rock flow system, with the objective of identifying contaminant migration and fate pathways from a historical release of 1,1,1‐trichloroethane (TCA). The study integrated hydrogeologic analysis techniques such as borehole geophysical logging, pumping test analysis, and hydrochemical facies analysis to study the impact of a dense nonaqueous phase liquid (DNAPL) in a sparsely fractured crystalline bedrock. The assessment methodology can be divided into two parts: (1) characterization of the source area, where DNAPL is acting as a residual source of TCA, and (2) characterization of the downgradient plume. Reduction in DNAPL mass in the source area has resulted in significant and sustained reductions in downgradient concentrations, suggesting that remediation of fractured crystalline bedrock contaminated with DNAPL is possible and not “technically infeasible.”

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Contaminant Transport in Karst Aquifers: Systematics and Mechanisms

White

2017

Advances in Karst Science

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Shallow lateral DNAPL migration within slightly dipping limestone, southwestern Kentucky

Cited by 8 publications

References 0 publications

Processes controlling the fate of chloroethenes emanating from DNAPL aged sources in river–aquifer contexts

Processes controlling the fate of chloroethenes emanating from DNAPL aged sources in river–aquifer contexts

Characterization of Crystalline Bedrock Contaminated by Dense Nonaqueous Liquid

Contaminant Transport in Karst Aquifers: Systematics and Mechanisms

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