Migration of contaminants in groundwater at a landfill: A case study

Egboka, B. C. E.; Cherry, John A.; Farvolden, R. N.; Frind, Emil O.

doi:10.1016/0022-1694(83)90223-8

Cited by 78 publications

(29 citation statements)

References 12 publications

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“…Investigations of groundwater systems using tritium have commonly used the 1960s bomb peak of tritium as a time marker to estimate groundwater velocities [e.g., Egboka et al, 1983;Robertson and Cherry, 1989]. Tritium is also used in the 3H-3He (helium 3) dating technique that has been the subject The Great Miami aquifer is composed of a heterogeneous mixture of coarse and fine-grained sediments deposited by receding glaciers during the Wisconsinan ice age.…”

Section: Introductionmentioning

confidence: 99%

Tritium–helium 3 dating under complex conditions in hydraulically stressed areas of a buried‐valley aquifer

Shapiro

Rowe

Schlosser

et al. 1998

Water Resources Research

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Abstract. The 3H-3He dating method is applied in a buried-valley aquifer near Dayton, Ohio. The study area is large, not all sampling locations lie along well-defined flow paths, and existing wells with variable screen lengths and diameters are used. Reliable use of the method at this site requires addressing several complications: (1) The flow system is disturbed because of high pumping rates and induced infiltration; (2) tritium contamination is present in several areas of the aquifer; and (3) radiogenic helium concentrations are elevated in a significant number of the wells. The 3H-3He ages are examined for self-consistency by comparing the reconstructed tritium evolution to the annual weighted tritium measured in precipitation; deviations result from dispersion, tritium contamination, and mixing. The 3H-3He ages are next examined for consistency with chlorofluorocarbon ages; the agreement is poor because of degradation of CFCs.Finally, the 3H-3He ages are examined for consistency with the current understanding of local hydrologic processes; the ages are generally supported by hydrogeologic data and the results of groundwater flow modeling coupled with particle-tracking analyses. IntroductionEstimates of aquifer properties that govern chemical transport have been made with increasing regularity using transient tracers, such as tritium (3H) and chlorofluorocarbons (CFCs), which have known time-dependent concentrations in precipitation and in the soil air, respectively, and thus in water recharged to aquifers. In groundwater flow systems where water residence times are less than 50 years, transient tracers can be used to estimate groundwater ages and velocities, aquifer porosity, and recharge rates, which in turn can be used in calibrating flow and transport models.Investigations of groundwater systems using tritium have commonly used the 1960s bomb peak of tritium as a time This contribution evaluates the usefulness of the 3H-3He method for dating groundwater in a complex buried-valley aquifer in southwest Ohio. Unlike many of the previous studies using this method, the study area is large, not all sampling locations lie along well-defined flow paths, and existing wells with variable diameters and screen lengths (up to 7 m) are used. In addition, successful application of the 3H-3He technique at this site is dependent on overcoming complications that in this combination, have not been important factors in previous 3H-3He studies. These complications include sampling flow systems altered by high rates of pumping, which may cause fractionation of the gases dissolved in the water; sampling groundwater affected by seepage of pollutants from sources associated with industrial, commercial, and military facilities, including a U.S. Department of Energy (DOE) research facility, near which tritium concentrations greatly exceed typical atmospheric precipitation levels; and sampling waters that have high concentrations of radiogenic helium. The radiogenic helium can cause analytical difficulties and further complicates t...

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Section: Introductionmentioning

confidence: 99%

Tritium–helium 3 dating under complex conditions in hydraulically stressed areas of a buried‐valley aquifer

Shapiro

Rowe

Schlosser

et al. 1998

Water Resources Research

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“…All samples for measurements of 36 Cl by AMS ( Because the isobar 36 S (natural abundance, 0.02% [9]) strongly interferes with 36 Cl measurements by accelerator mass spectrometry (AMS), the chemical reduction of sulfur is of major importance in preparing AgCl samples. The removal of sulfur (in the form of SO 4 2− ) can be achieved by the precipitation of BaSO 4 (e.g., [35]), by differential elution from an anion exchange resin [36], or by absorption onto a cation exchange resin (in the form of BaSO 4 ) [37]. The main part of sample preparation, including sulfur reduction, was performed in an air-conditioned room to prevent additional sulfur contamination and was performed under dark conditions to avoid the photolytic decomposition of AgCl.…”

Section: Methodsmentioning

confidence: 99%

“…The sample was purified by repeated precipitation of AgCl with HNO 3 and dissolution in NH 4 OH. To further exclude remaining impurities, the AgCl precipitate was washed with Milli-Q ultrapure water twice and with 99.5% C 2 H 5 OH twice using ultrasonic vibration.…”

Section: Methodsmentioning

confidence: 99%

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Distribution of 36Cl in the Yoro River Basin, Central Japan, and Its Relation to the Residence Time of the Regional Groundwater Flow System

Tosaki

Tase

Kondoh

et al. 2011

Water

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“…Especially, tritium concentrations can well constrain the source and age of groundwater in one area. "Bomb-tritium" produced by above-ground thermonuclear tests beginning in 1953 has proven to be an excellent tracer and/or time marker in hydrological systems (e.g., Brown 1961;Allison and Hughes 1975;Egboka et al 1983;Robertson and Cherry 1989;Daniels et al 1991;Liu 1995). Before 1953, natural 3 H concentrations in precipitation at the lower latitudes were estimated at 3.4 to 6.6 tritium units (TU) (Kaufman and Libby 1954).…”

Section: Introductionmentioning

confidence: 99%

Tritium Concentrations and Radiocarbon Ages of Gushing Groundwater from Hsuehshan Tunnel, Northern Taiwan

Liu¹,

Chen²,

Yang³

et al. 2005

Terr. Atmos. Ocean. Sci.

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Migration of contaminants in groundwater at a landfill: A case study

Cited by 78 publications

References 12 publications

Tritium–helium 3 dating under complex conditions in hydraulically stressed areas of a buried‐valley aquifer

Tritium–helium 3 dating under complex conditions in hydraulically stressed areas of a buried‐valley aquifer

Distribution of 36Cl in the Yoro River Basin, Central Japan, and Its Relation to the Residence Time of the Regional Groundwater Flow System

Tritium Concentrations and Radiocarbon Ages of Gushing Groundwater from Hsuehshan Tunnel, Northern Taiwan

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