Tritium Levels in Leachates and Condensates from Domestic Wastes in Landfill Sites

Robinson, Howard; Gronow, Jan R.

doi:10.1111/j.1747-6593.1996.tb00070.x

Cited by 37 publications

(31 citation statements)

References 11 publications

(2 reference statements)

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“…Such enrichment is well known in MSW landfills (e.g. Robinson and Gronow, 1996) and can be explained by the presence of paints, watches and other luminescent products. Waters with 3 H concentrations between 11 and 25 TU are found down-gradient from the landfill, in PZ3 and in the pond, suggesting an influence of the landfill.…”

Section: Results Of Geochemical Investigationsmentioning

confidence: 99%

Investigations of natural attenuation in groundwater near a landfill and implications for landfill post-closure

et al. 2010

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The controlled landfill technology is now adopting passive attenuation techniques as an increasing number of landfill sites reach the post-closure phase. During the post-closure phase, landfill operators need to convince environmental authorities that landfills no longer pose a threat to health or the environment. The demonstration of such absence of risk should rely in particular on data collected during environmental monitoring in addition to modelling of possible future evolutions of environmental concentrations. One difficulty that is typically encountered in France is related to the fact that groundwater monitoring systems around landfills are often insufficiently detailed to provide conclusive evidence of natural attenuation mechanisms. This paper presents data on groundwater quality in the vicinity of an old landfill located in a complex aquifer system. While isotopic data suggest a signature of the landfill leachate in the groundwater in the vicinity of the landfill, chemical analyses do not show a strong influence, which could be indicative of natural attenuation mechanisms. However, the complexity of the groundwater system in this area is such that it cannot be excluded that emissions to the groundwater are not being overlooked. Implications of demonstrating natural attenuation during the landfill post-closure phase, with respect to groundwater monitoring, are discussed.Keywords: Landfill, Groundwater, Natural Attenuation, Isotopes, Monitoring 2 IntroductionThe "Controlled Landfill" technology, which emerged in the seventies but only became truly operational in France in the late eighties under the impetus of environmental regulations, is now adopting passive attenuation techniques, as an increasing number of landfill sites reach the post-closure phase. A typical example of such techniques is the use of methane oxidation covers for the passive treatment of residual greenhouse gas emissions (e.g. Scheutz et al., 2009). From an operator's perspective, if a landfill is no longer a source of income, it is highly desirable that it should rapidly cease to be a source of cost.Therefore during the post-closure phase, landfill operators need to convince environmental inspectors that landfills no longer pose a threat to health or the environment.The demonstration of such absence of risk should rely in particular on data collected from environmental monitoring networks in addition to modelling of possible future evolutions of environmental concentrations. Models for groundwater contaminant transport generally include conservative assumptions, due to the inherent complexity of mechanisms affecting the fate of contaminants in groundwater near landfills. Because conservative assumptions tend to maximise the estimation of risk, it would seem necessary in a context of post-closure risk assessments for decommissioning old landfills, to demonstrate by field data that attenuation mechanisms are at work in the subsurface. Such demonstration has been performed in the past by several researchers. In an extensive review of t...

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Section: Results Of Geochemical Investigationsmentioning

confidence: 99%

Investigations of natural attenuation in groundwater near a landfill and implications for landfill post-closure

et al. 2010

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“…Based on this, we can conclude that the two-stage UASB reactor treated successfully in treating the leachate from food wastes. In some previous studies on aerobic treatment of municipal landfill leachate [31,32], ammonia was mainly removed by assimilation of activated sludge or by volatilisation.…”

Section: Vfa and Ph Variations In Uasb Reactorsmentioning

confidence: 99%

Anaerobic/aerobic treatment of municipal landfill leachate in sequential two-stage up-flow anaerobic sludge blanket reactor (UASB)/completely stirred tank reactor (CSTR) systems

Ağdağ

Sponza

2005

Process Biochemistry

109

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“…A further complication is that some landfills may be sources of elevated 3 H (Robinson and Gronow, 1996). Despite these potential limitations, 3 H can still play a useful role in groundwater investigations by providing a crosscheck on information obtained from the trace-gas indicators.…”

Section: Tritiummentioning

confidence: 99%

Using environmental tracers to assess the extent of river–groundwater interaction in a quarried area of the English Chalk

Darling

Gooddy

Riches

et al. 2010

Applied Geochemistry

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The Swanscombe area of Kent, SE England represents a typical example of a heavily quarried Chalk area currently undergoing re-development. Because the Chalk is also an important aquifer, a good understanding of groundwater movement is required if environmental impacts are to be minimised and the water resource maximised. In particular, the nature of the relationship between the River Darent and groundwater in the Swanscombe Chalk Block requires better characterisation. Here, 'environmental tracers' in the form of ambient concentrations of stable isotopes, CFCs (chlorofluorocarbons), SF 6 (sulphur hexafluoride) and tritium ( 3 H) are used to investigate this and other aspects of groundwater movement in the vicinity of the quarries. Stable isotopic contrasts indicate little evidence for widespread river infiltration to the regional Chalk aquifer, although stable isotope and tritium data suggest that 20-35% of the abstraction by river-valley public water supply boreholes may be derived from the river. The CFCs, while present at above-modern concentrations in almost all groundwaters, can be used as tracers, indicating basically S-N flowpaths in the area south of the quarries, though sub-karstic conduits associated with areas of Palaeogene cover add a level of uncertainty at the local scale. Simple piston flow residence times based on SF 6 range from 1 to 17 years, but the data are probably better interpreted in terms of mixing between varying amounts of modern recharge derived from the south and deeper stored groundwater. The information gained from environmental tracers can therefore contribute to effective resource management.

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Tritium Levels in Leachates and Condensates from Domestic Wastes in Landfill Sites

Cited by 37 publications

References 11 publications

Investigations of natural attenuation in groundwater near a landfill and implications for landfill post-closure

Investigations of natural attenuation in groundwater near a landfill and implications for landfill post-closure

Anaerobic/aerobic treatment of municipal landfill leachate in sequential two-stage up-flow anaerobic sludge blanket reactor (UASB)/completely stirred tank reactor (CSTR) systems

Using environmental tracers to assess the extent of river–groundwater interaction in a quarried area of the English Chalk

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