Isotope and dissolved gas evidence for nitrogen attenuation in landfill leachate dispersing into a chalk aquifer

Heaton, T.H.E.; Trick, Julian K.; Williams, Geoffrey Lee

doi:10.1016/j.apgeochem.2004.12.004

Cited by 21 publications

(15 citation statements)

References 13 publications

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“…KB 33 also worrying when the increasing pattern in the year (Refer Anthropogenic activities such as urbanization are one of the major components that are causing the hight NH 4 in the ground water. NH 4 in aquifer is contaminated by the landfills and the waste disposal method (Baedecker& Back, 1979;LeBlanc, 1984;Cozzarelli et al, 2000;Heaton et al, 2005). …”

Section: Resultsmentioning

confidence: 99%

The Effect of the Ammonium Concentration in the Groundwater

Kamal¹,

Hashim²,

Zin

2017

Pijss

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Section: Resultsmentioning

confidence: 99%

The Effect of the Ammonium Concentration in the Groundwater

Kamal¹,

Hashim²,

Zin

2017

Pijss

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“…clay-poor aquifers or those with low metal oxides), and in particular at NH 4 + plume margins (Buss et al 2004). Although it is likely that most nitrification will occur in aerobic conditions, there is some evidence for the occurrence of anaerobic nitrification in UK aquifers (Buss et al 2004;Heaton et al 2005;Lee et al 2006;Erguder et al 2009). …”

Section: Contemporary Issues In Uk Aquifer Microbiology Diffuse Nitramentioning

confidence: 99%

Microbial communities in UK aquifers: current understanding and future research needs

Gregory

Maurice

West

et al. 2014

QJEGH

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The presence and activity of microorganisms in aquifers can affect, amongst other things, nutrient cycling, contaminant degradation and water flow. The introduction of a pollutant or other changes in water chemistry can alter the microbial community composition and affect aquifer functioning. To understand the microbial response to anthropogenically induced changes, a better knowledge of baseline microbial communities in uncontaminated aquifers is needed. Here, we review the information on microorganisms in UK aquifers together with examples of research from other countries on this topic, and discuss how these communities might respond to disturbance. Research into microbial communities in UK aquifers has mostly been limited to bacteria and often reveals a community dominated by Proteobacteria. The community composition is influenced by factors such as mineralogy and water chemistry, and the natural baseline community may be altered by aquifer contamination. A UK-wide survey of aquifer microbes, similar to one recently carried out in New Zealand, would provide valuable information about the current state of UK aquifer microbiology. This would lead to a greatly improved understanding of the ecosystem services provided by the microbial communities present in aquifers, allow future monitoring and assessment of the effects of pollution, and assist in groundwater resource management.

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“…Despite the environmental importance of NO 3 -and NH 4 + , there are few studies documenting their transport and reaction processes in aquifers (Heaton et al, 2005). Isotopic fractionation studies can provide an excellent tool for understanding N transport and speciation (Wassenaar, 1995;Böhlke et al, 2006).…”

Section: Nhmentioning

confidence: 99%

“…However, NH 4 + and NO 3 -also occur in groundwater from anthropogenic sources. High concentrations of NH 4 + (10-1000 mg/L) have been found in groundwaters impacted by landfill leachates and as a result of domestic and agricultural waste water disposal practices (Gooddy et al, 1998;Lawrence et al, 2000;Christensen et al, 2001;Heaton et al, 2005). High concentrations of NO 3 -are typically association with diffuse agricultural pollution from fertilisers (Oaks et al, 1981;Addiscott et al, 1991) although oxidation of anthropogenic ammonium sources also causes high NO 3 -concentrations (Gooddy et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…In Europe and North America there is a legacy of historic pollution from these sites (e.g. Heaton et al, 2005;Lorah et al, 2009). As such, landfill leachate plumes may contain high dissolved organic C (DOC) and NH 4 + concentrations as well as ferrous iron, chloride and bicarbonate relative to natural floodplain conditions (Lorha et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen sources, transport and processing in peri-urban floodplains

Gooddy

Macdonald

Lapworth

et al. 2014

Science of The Total Environment

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Peri-urban floodplains are an important interface between developed land and the aquatic environment and may act as a source or sink for contaminants moving from urban areas towards surface water courses. With increasing pressure from urban development the functioning of floodplains is coming under greater scrutiny. A number of peri-urban sites have been found to be populated with legacy landfills which could potentially cause pollution of adjacent river bodies. Here, a peri-urban floodplain adjoining the city of Oxford, UK, with the River Thames has been investigated over a period of three years through repeated sampling of groundwaters from existing and specially constructed piezometers. A nearby landfill has been found to have imprinted a strong signal on the groundwater with particularly high concentrations of ammonium and generally low concentrations of nitrate and dissolved oxygen. An intensive study of nitrogen dynamics through the use of N-species chemistry, nitrogen isotopes and dissolved nitrous oxide reveals there is little or no denitrification in the majority of the main landfill plume, and neither is the ammonium significantly retarded by sorption to the aquifer sediments. A simple model has determined the flux of total nitrogen and ammonium from the landfill, through the floodplain and into the river. Over an 8 km reach of the river, which has a number of other legacy landfills, it is estimated that 27.5 tonnes of ammonium may be delivered to the river annually. Although this is a relatively small contribution to the total river nitrogen, it may represent up to 15% of the ammonium loading at the study site and over the length of the reach could increase in-stream concentrations by nearly 40%. Catchment management plans that encompass floodplains in the peri-urban environment need to take into account the likely risk to groundwater and surface water quality that these environments pose.

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Isotope and dissolved gas evidence for nitrogen attenuation in landfill leachate dispersing into a chalk aquifer

Cited by 21 publications

References 13 publications

The Effect of the Ammonium Concentration in the Groundwater

The Effect of the Ammonium Concentration in the Groundwater

Microbial communities in UK aquifers: current understanding and future research needs

Nitrogen sources, transport and processing in peri-urban floodplains

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