Journal ArticleDOI
Exsolution of nitrogen and argon by methanogenesis in Dutch ground water
N.P.M. Fortuin,August Willemsen +1 more
TLDR
In this paper, Dutch ground water was sampled under high pressure in stainless steel vessels and analysed by gas chromatography for Ar, N2, CH4 and O2, showing a deficit N2 and Ar concentrations combined with a high CH4 concentration that are attributed to the occurrence of exsolution of Ar and N2 during methanogenesis.About:
This article is published in Journal of Hydrology.The article was published on 2005-01-20. It has received 43 citations till now. The article focuses on the topics: Partial pressure & Denitrification.read more
Citations
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Journal ArticleDOI
Freshwaters: which NOM matters?
TL;DR: This study includes a review of the most widely applied terminology, as described in over 500 articles, and a first attempt at assessing how the panoply of methods available is really used in applied environmental studies.
Journal ArticleDOI
Investigating the role of gas bubble formation and entrapment in contaminated aquifers: Reactive transport modelling.
Richard T. Amos,K. Ulrich Mayer +1 more
TL;DR: The enhanced model has been used to simulate processes in a petroleum hydrocarbon contaminated aquifer where methanogenesis is an important redox process and permeability reduction in the methanogenic zone due to in-situ formation of gas bubbles, and dissolution of entrapped atmospheric bubbles near the water table, both work to attenuate the dissolved gas plume emanating from the source zone.
Journal ArticleDOI
The practicalities of using CFCs and SF6 for groundwater dating and tracing
TL;DR: In this paper, the build-up in the atmosphere of the trace gases chlorofluorocarbons (CFCs) and sulphur hexafluoride (SF6) from the middle of the last century offers a convenient way of dating waters up to ∼60 years old.
Journal ArticleDOI
Modeling excess air and degassing in groundwater by equilibrium partitioning with a gas phase
TL;DR: The concept of closed-system equilibration between groundwater and trapped bubbles has been used to model the loss of dissolved gases and compare its performance to alternative models assuming a diffusion-controlled degassing process as mentioned in this paper.
Book ChapterDOI
Noble Gas Thermometry in Groundwater Hydrology
TL;DR: The application of noble gases as tracers in groundwater hydrology is discussed in this article, where a detailed account of currently available sampling techniques is given, as this information is of great practical importance but not fully available in the scientific literature.
References
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ReportDOI
User's guide to PHREEQC (Version 2)-a computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations
David L. Parkhurst,C.A.J. Appelo +1 more
TL;DR: PHREEQC as discussed by the authors is a C program written in the C programming language that is designed to perform a wide variety of low-temperature aqueous geochemical calculations.
Journal ArticleDOI
The solubility of nitrogen, oxygen and argon in water and seawater
TL;DR: In this paper, precise data on the solubilities of nitrogen, oxygen and argon in distilled water and seawater are fitted to thermodynamically consistent equations by the method of least squares.
Journal ArticleDOI
Cooling of Tropical Brazil (5°C) During the Last Glacial Maximum
Martin Stute,M. Forster,H. Frischkorn,A. Serejo,Jordan F. Clark,Peter Schlosser,Wallace S. Broecker,Georges Bonani +7 more
TL;DR: A 30,000-year paleotemperature record derived from noble gases dissolved in carbon-14-dated ground water indicates that the climate in lowland Brazil (Piaui Province, 7 degrees S, 41.5 degrees W; altitude, 400 meters) was 5.4 degrees +/- 0.6 degrees C cooler during the last glacial maximum than today.
Journal ArticleDOI
“Excess air” in groundwater
T.H.E. Heaton,J.C. Vogel +1 more
TL;DR: The concentrations of dissolved gaseous nitrogen and argon in groundwater from a number of areas in South Africa are in many cases higher than the concentrations to be expected for atmospheric equilibrium.
Journal ArticleDOI
The chemistry of geothermal waters in Iceland. I. Calculation of aqueous speciation from 0° to 370°C
TL;DR: In this article, a computer program is developed to calculate the composition and aqueous speciation of geothermal reservoir waters including pH, redox potential and gas partial pressures, which is specifically suited to handle geochemical data from wet-steam wells, hot-water wells and boiling hot springs, but it may also be used for non-thermal waters.