Distribution and mineralogical controls on ammonium in deep groundwaters

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doi: 10.1016/j.apgeochem.2004.01.019
Authors:Manning, David A. C.; Hutcheon, Ian E.
Author Affiliations:Primary:
University of Newcastle, School of Civil Engineering and Geosciences, Newcastle Upon Tyne, United Kingdom
University of Calgary, Canada
Volume Title:Applied Geochemistry
Source:Applied Geochemistry, 19(9), p.1495-1503. Publisher: Pergamon, Oxford-New York-Beijing, International. ISSN: 0883-2927
Publication Date:2004
Note:In English. 31 refs.; illus., incl. 3 tables
Summary:Compositional data from published sources, environmental monitoring and new analyses demonstrate that for a wide range of water types (oilfield water, coal mine water, landfill leachate) NH4+ is present in amounts up to 2200 mg/L. Oilfield waters from Alberta, Canada contain 1-1000 mg/L NH4+, coal mine water (UK) surface discharges 1-45 mg/L NH4+, and landfill leachates (UK) up to 2200 mg/L NH4+. Ammonium contents generally show a positive correlation with K, and increase with increasing salinity. Geochemical modelling of sufficiently complete data using SOLMINEQ88 demonstrates that NH4+ activities vary systematically, and are consistent with a mineralogical control. Sodium-K exchange divides the entire sample suite into at least 4 groups, controlled by reaction temperature and reaction with either albite/K-feldspar or illitic clay minerals. In contrast, comparison of NH4+ and K divides the sample suite into 2 groups. On the basis of geological setting, these correspond to K-NH4+ exchange involving illitic (illite-muscovite) clays (and possibly feldspars) for samples from natural sources, and to exchange involving smectitic clays for samples from landfill sites. This study demonstrates the importance of NH4+ as a constituent of natural groundwaters, requiring that this reservoir of N is taken into account in detailed discussion of hydrological components of the N cycle. Abstract Copyright (2004) Elsevier, B.V.
Subjects:Ammonium ion; Aquifers; Chemical composition; Clay minerals; Coal mines; Controls; Depth; Discharge; Environmental analysis; Geochemical cycle; Geochemistry; Ground water; Hydrocarbons; Hydrochemistry; Hydrology; Landfills; Leachate; Mineral composition; Mines; Monitoring; Nitrogen; Oil and gas fields; Organic compounds; Pollutants; Pollution; Reservoir rocks; Salinity; Sedimentary rocks; Sheet silicates; Silicates; Smectite; Springs; Waste disposal; Alberta; Canada; Western Canada
Record ID:2005063487
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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