Searched for: subject:"Geochemistry"
(1 - 20 of 24)

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Goldberg, T. (author), Hennekam, R. (author), Wasch, L.J. (author), Reichart, G.J. (author), Rach, O. (author), Stammeier, J.A. (author), Griffioen, J. (author)
Multi-element analysis of discrete samples via X-Ray fluorescence or inductively coupled plasma spectrometry is commonly used to characterise the composition of solid geo-materials for environmental geochemical characterisation. Conventional geochemical analysis of individual samples is time consuming and costly, which often results in low...
article 2021
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Campbell, D. (author), de Beer, J. (author), Mielby, S. (author), van Campenhout, I. (author), van der Meulen, M. (author), Erikkson, I. (author), Ganerod, G. (author), Lawrence, D. (author), Bacic, M. (author), Donald, A. (author), Gogu, C.R. (author), Jelenek, J. (author)
The European COST Sub-Urban Action (TU1206) has had the fundamental aim of closing the knowledge gap between subsurface experts and potential users of subsurface knowledge - urban decision- makers, practitioners and researchers. The Action assembled a network involving >30 countries, 23 actively participating cities, researchers, practitioners...
conference paper 2017
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Rits, D.S. (author), Beets, C.J. (author), Prins, M.A. (author), van Balen, R.T. (author), Troelstra, S.R. (author), Luo, C. (author), Wang, B. (author), Li, X. (author), Zhou, J. (author), Zheng, H. (author)
Major reorganizations in climate and tectonic regime occurred in East Asia during the Pleistocene, resulting in large-scale environmental changes. In this paper a detailed geochemical and mineralogical record of these changes is presented from a distal alluvial fan sedimentary sequence in the northern Weihe Basin. We established that, in...
article 2017
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Mielby, S. (author), Eriksson, I. (author), Campbell, D. (author), de Beer, J. (author), Bonsor, H. (author), le Guern, C. (author), van der Kroft, R.A.A. (author), Lawrence, D. (author), Ryzynski, G. (author), Schokker, J. (author), Watson, C. (author)
The subsurface is an important constituent of the physical environment of cities. We live on top of it; building and construction have to deal with the structure and properties of the subsurface, and occasionally with the hazards it presents; and we benefit from, and in some cases are dependent, on many of its ecosystem services. Cities not only...
report 2017
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Tambach, T.J. (author), Koenen, M. (author), Wasch, L.J. (author), van Bergen, F. (author)
The short- and long-term geochemical impact of CO2 injection into a depleted gas reservoir (DGR) is investigated using reservoir/geochemical modeling with TOUGH2/TOUGHREACT and 1D kinetic diffusion modeling with PHREEQC (caprock/well-cement). Simulations of CO2 injection into the reservoir predict displacement and buoyancy of post-production CH4...
article 2015
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Douglas, P.M.J. (author), Affek, H.P. (author), Ivany, L.C. (author), Houben, A.J.P. (author), Sijp, W.P. (author), Sluijs, A. (author), Schouten, S. (author), Pagani, M. (author)
Paleoclimate studies suggest that increased global warmth during the Eocene epoch was greatly amplified at high latitudes, a state that climate models cannot fully reproduce. However, proxy estimates of Eocene near-Antarctic sea surface temperatures (SSTs) have produced widely divergent results at similar latitudes, with SSTs above 20 °C in the...
article 2014
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Saaltink, R. (author), Griffioen, J. (author), Mol, G. (author), Birke, M. (author)
Purpose: Concern about the environmental impact of agriculture caused by intensification is growing as large amounts of nutrients and contaminants are introduced into the environment. The aim of this paper is to identify the geogenic and agricultural controls on the elemental composition of European, grazing and agricultural soils. Materials and...
article 2014
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Zijp, M. (author), ten Veen, J. (author), Ventra, D. (author), Verreussel, R. (author), van Laerhoven, L. (author), Boxem, T. (author)
This study shows the first results of an ongoing project on the characterization of variations in lithological- and geomechanical properties of targetted gas shale formations. The aim of this study is to get an increased insight into both the fraccability and productivity of a shale formations. Ultimately, this can lead to better localization of...
conference paper 2014
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Koenen, M. (author), Wasch, L.J. (author)
Many uncertainties exist in geochemical modeling. Mineral reactive surface area is one of the uncertain parameters. QEMSCAN analyses are performed on sandstone samples from a Dutch CO2 natural analogue to determine reactive surface areas. Geochemical modeling is performed using QEMSCAN surface areas and surface areas which are conventionally...
conference paper 2013
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Wasch, L.J. (author), Koenen, M. (author), Wollenweber, J. (author), ter Heege, J.H. (author), Tambach, T.J. (author)
Large scale implementation of CO2 storage can significantly reduce emission of greenhouse gasses into the atmosphere. However, safe and long-term containment of CO2 in storage reservoirs must be ensured. Wellbores in the subsurface present possible leakage pathways for CO2 to the surface and hence wellbore cement reactivity is of major concern....
conference paper 2013
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Griffioen, J. (author), Klein, J. (author), van Gaans, P.F.M. (author)
Quantitative insight into the reaction capacity of porous media is necessary to assess the buffering capacity of the subsurface against contaminant input via groundwater recharge. Here, reaction capacity is to be considered as a series of geochemical characteristics that control acid/base conditions, redox conditions and sorption intensity....
article 2012
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Koenen, M. (author), Tambach, T.J. (author), Neele, F.P. (author)
In most cases, CO2 captured from power plants or large industrial sources contains impurities. As purification of the stream is energy and cost intensive it is necessary to allow a certain level of impurities. The effects of impurities on (short- and long-term) geological storage are, however, uncertain. In this work, geochemical modelling with...
conference paper 2011
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van Gaans, P.F.M. (author), Griffioen, J. (author), Mol, G. (author), Klaver, G. (author)
Purpose: Sedimentary aquifers are prone to anthropogenic disturbance. Measures aimed at mitigation or adaptation require sound information on the reactivity of soil/sediments towards the infiltrating water, as this determines the chemical quality of the groundwater and receiving surface waters. Here, we address the issues of relevant sediment...
article 2011
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Tambach, T. (author), Koenen, M. (author), van Bergen, F. (author)
Over the past few years several geochemical evaluations of CO2 storage in Dutch potential reservoirs are carried out, including predictions of the short- and long-term impact of CO2 on the reservoir using geochemical modelling. The initial mineralogy of the reservoir is frequently obtained from core analysis and is then used to compute the...
conference paper 2011
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Griffioen, J. (author), Klein, J. (author), Heerdink, R. (author)
Sustainable groundwater management asks for good insight into the geochemical characteristics of the groundwater aquifers. A nationwide environmental geochemical characterisation of shallow sedimentary deposits was initiated in the Netherlands to meet this information need. The methodology is briefly outlined and some results are presented for...
conference paper 2011
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Kombrink, H. (author), van Os, B.J.H. (author), van der Zwan, C.J. (author), Wong, Th.E. (author), TNO Bouw en Ondergrond (author)
Geochemical studies on Upper Carboniferous marine bands showed that marked enrichment in redox-sensitive trace elements (uranium (U), vanadium (V), molybdenum (Mo)) mostly occur if they contain Goniatites. Goniatites indicate deposition in relatively distal and deep marine environments. In contrast, Westphalian marine bands found in the...
article 2008
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Beumer, V. (author), van Wirdum, G. (author), Beltman, B. (author), Griffioen, J. (author), Grootjans, A.P. (author), Verhoeven, J.T.A. (author), TNO Bouw en Ondergrond (author)
Dutch water policy aims for more frequent, controlled flooding of river valley floodplains to avoid unwanted flooding elsewhere; in anticipation of increased flooding risks resulting from climate changes. Controlled flooding usually takes place in winter in parts of the valleys which had not been subject to flooding in the last decades. It may...
article 2008
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van der Grift, B. (author), Griffioen, J. (author), TNO Bouw en Ondergrond (author)
Historic emissions from ore smelters typically cause regional soil contamination. We developed a modelling approach to assess the impact of such contamination on groundwater and surface water load, coupling unsaturated zone leaching modelling with 3D groundwater transport modelling. Both historic and predictive modelling were performed, using a...
article 2008
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Fest, E.P.M.J. (author), Temminghoff, E.J.M. (author), Griffioen, J. (author), van der Grift, B. (author), van Riemsdijk, W.H. (author), TNO Bouw en Ondergrond (author)
Aluminium has received great attention in the second half of the 20th century, mainly in the context of the acid rain problem mostly in forest soils. In this research the effect of land use and depth of the groundwater on Al, pH and DOC concentration in groundwater under Dutch sandy soils has been studied. Both pH and DOC concentration play a...
article 2007
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van Helvoort, P.J. (author), Griffioen, J. (author), Hartog, N. (author), TNO Bouw en Ondergrond (author)
Large groundwater resources are found in densely populated lowland areas, which consist often of young unconsolidated and reduced sediments. When anthropogenic activities lead to oxygenation of the aquifer, breakdown of the main reduced fractions, i.e. sedimentary organic matter (SOM) and pyrite, could lead to severe groundwater deterioration...
article 2007
Searched for: subject:"Geochemistry"
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