Natural Attenuation of Aromatic Compounds and Heavy Metals in a Lacustrine Sand Aquifer at Villa Farm, UK

Williams, Geoffrey Lee

doi:10.1007/978-1-4615-4749-5_27

Novel Approaches for Bioremediation of Organic Pollution 1999

DOI: 10.1007/978-1-4615-4749-5_27

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Natural Attenuation of Aromatic Compounds and Heavy Metals in a Lacustrine Sand Aquifer at Villa Farm, UK

Geoffrey Lee Williams

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2001

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Cited by 2 publications

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Penetration of herbicides to groundwater in an unconfined chalk aquifer following normal soil applications

Johnson

Besien

Bhardwaj

et al. 2001

Journal of Contaminant Hydrology

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The persistence and penetration of the herbicides isoproturon and chlorotoluron in an unconfined chalk aquifer has been monitored over a 4-year period through soil sampling, shallow coring and groundwater monitoring. Chlorotoluron was applied on plots as a marker compound, having never been used previously on that, or surrounding fields. The fieldsite had a 5 degree slope with soil depths of 0.5 to 1.5 m and a water table between 20 and 5 m from the soil surface. Where the water table was deepest (9-20 m below surface (mbs)) little or no positive herbicide detections were made. However, where the water table was at only 4-5 mbs, a regular pesticide signal of around 0.1 microg/l for isoproturon and chlorotoluron could be distinguished. Over the winter recharge period automatic borehole samplers revealed a series of short-lived peaks of isoproturon and chlorotoluron reaching up to 0.8 microg/l. This is consistent with a preferential flow mechanism operating at this particular part of the field. Such peaks were occurring over 2 years after the last application of these compounds. Shallow coring failed to uncover any significant pesticide pulse moving through the deep unsaturated zone matrix at the fieldsite.

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Penetration of herbicides to groundwater in an unconfined chalk aquifer following normal soil applications

Johnson

Besien

Bhardwaj

et al. 2001

Journal of Contaminant Hydrology

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Simulating groundwater contaminant migration at Villa Farm lagoons

Mackay

Riley²,

Williams³

2001

QJEGH

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agoons at Villa Farm near Coventry, UK were used for the disposal of industrial liquid waste after 1967. The lagoons were unlined and a leachate plume developed in the underlying thin sand aquifer. As part of a research programme into controls on the migration of landfill leachate, a twodimensional areal model describing the regional scale movement of chloride and phenol in the aquifer has been developed. Parameter ranges for advection, dispersion, degradation and adsorption have been established through model calibration, constrained by the results from previous laboratory studies. Linear representations of the adsorption and degradation processes are found to yield satisfactory results on the time and space scales adopted for the simulations. The model development has highlighted some important issues that have to be confronted when analysing the evolution of a plume based on short-term, late-time data. The uncertainty in the geometry of the aquifer on the simulated flow system has been examined using geostatistical methods.

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Natural Attenuation of Aromatic Compounds and Heavy Metals in a Lacustrine Sand Aquifer at Villa Farm, UK

Cited by 2 publications

References 5 publications

Penetration of herbicides to groundwater in an unconfined chalk aquifer following normal soil applications

Penetration of herbicides to groundwater in an unconfined chalk aquifer following normal soil applications

Simulating groundwater contaminant migration at Villa Farm lagoons

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