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

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doi: 10.1016/j.apgeochem.2004.12.004
Authors:Heaton, T. H. E.; Trick, J. K.; Williams, G. M.
Author Affiliations:Primary:
British Geological Survey, Keyworth, United Kingdom
Volume Title:Applied Geochemistry
Source:Applied Geochemistry, 20(5), p.933-945. Publisher: Pergamon, Oxford-New York-Beijing, International. ISSN: 0883-2927
Publication Date:2005
Note:In English. 32 refs.; illus., incl. 6 tables, sketch maps
Summary:The authors present data for the chemical, stable isotope (13C/12C, 15N/14N and 34S/32S), and dissolved gas (N2, Ar, O2 and CH4) composition of groundwaters sampled in and around a landfill site in Cambridgeshire, England. Decomposition of 3×106 m3 of largely domestic waste, placed in unlined quarries, has given rise to the formation of an NH4-rich leachate dispersing as a plume into the surrounding Middle Chalk aquifer. In addition to identifying zones of methanogenesis and SO4 reduction, the data indicate processes of NH4 transformation by either assimilation or oxidation, and losses by formation of N2. Depending on the mixing ratio between leachate and background water, it may be possible to account for all NH4 loss by combined nitrification+denitrification in a system where there are abrupt temporal and spatial changes in redox conditions.
Sections:Environmental studies; Geochemistry
Subsections:Hydrogeochemistry
Subjects:Aliphatic hydrocarbons; Alkanes; Aquifers; Attenuation; C-13/C-12; Carbon; Carbonate rocks; Chalk; Chemical analysis; Chemical composition; Denitrification; Eh; Environmental analysis; Gases; Geochemistry; Ground water; Human activity; Hydrocarbons; Hydrochemistry; Isotope fractionation; Isotope ratios; Isotopes; Landfills; Leachate; Methane; N-15/N-14; Nitrates; Nitrification; Nitrogen; Organic compounds; Pollutants; Pollution; Quarries; Reduction; Reservoir rocks; S-34/S-32; Sedimentary rocks; Solutes; Stable isotopes; Sulfates; Sulfur; Waste disposal; Water wells; Cambridgeshire England; England; Europe; Great Britain; United Kingdom; Western Europe; Middle Chalk; Thriplow England
Coordinates:N520100 N522400 E0031000 E0001700
Abstract Numbers:05M/2047
Record ID:2006014494
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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