Carbon chemistry and groundwater dynamics at natural analogue site Ruprechtov, Czech Republic: Insights from environmental isotopes

Noseck, Ulrich; Różański, Kazimierz; Duliński, Marek; Havlová, Václava; Šráček, Ondra; Brasser, Thomas; Hercik, Mirek; Buckau, G.

doi:10.1016/j.apgeochem.2009.05.007

Cited by 26 publications

(13 citation statements)

References 15 publications

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“…The potential for other processes besides aquifer carbonate mineral dissolution to impact stable and radioactive carbon isotope compositions limits the applicability of fossil water fraction calculations for some aquifers. Endogenous CO 2 inputs can complicate fossil water fraction calculations (Noseck et al, ), but the relevance of these inputs is likely of secondary importance relative to carbonate dissolution in most aquifer systems. In other areas, dissolution of carbonate minerals in unsaturated zones that overlie groundwater may mean that radiocarbon data cannot provide useful information about groundwater ages (e.g., Meredith et al, ).…”

Section: Fossil Groundwatermentioning

confidence: 99%

Global Isotope Hydrogeology―Review

Jasechko

2019

Reviews of Geophysics

189

124

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Groundwater 18O/16O, 2H/1H, 13C/12C, 3H, and 14C data can help quantify molecular movements and chemical reactions governing groundwater recharge, quality, storage, flow, and discharge. Here, commonly applied approaches to isotopic data analysis are reviewed, involving groundwater recharge seasonality, recharge elevations, groundwater ages, paleoclimate conditions, and groundwater discharge. Reviewed works confirm and quantify long held tenets: (i) that recharge derives disproportionately from wet season and winter precipitation; (ii) that modern groundwaters comprise little global groundwater; (iii) that “fossil” (>12,000‐year‐old) groundwaters dominate global aquifer storage; (iv) that fossil groundwaters capture late‐Pleistocene climate conditions; (v) that surface‐borne contaminants are more common in younger groundwaters; and (vi) that groundwater discharges generate substantial streamflow. Groundwater isotope data are disproportionately common to midlatitudes and sedimentary basins equipped for irrigated agriculture, but less plentiful across high latitudes, hyperarid deserts, and equatorial rainforests. Some of these underexplored aquifer systems may be suitable targets for future field testing.

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Section: Fossil Groundwatermentioning

confidence: 99%

Global Isotope Hydrogeology―Review

Jasechko

2019

Reviews of Geophysics

189

124

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“…Such is the case for naturally derived aquifer materials and materials derived from anthropogenic pollution (e.g., Torssander et al, 2006;Sato et al, 2008;Noseck et al, 2009;Shikazono, 2011); this is not limited to the granitic and volcanic rock areas (e.g., Muramatsu et al, 2010a, b). However, environmental background data for the δ 34 S values of aqueous sulfate are still not abundant.…”

Section: Discussionmentioning

confidence: 99%

Hydrochemistry and isotopic characteristics of non-volcanic hot springs around the Miocene Kofu granitic complex surrounding the Kofu Basin in the South Fossa Magna region, central Honshu, Japan

Yaguchi

Muramatsu²,

Chiba

et al. 2014

Geochem. J.

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“…The interaction of U(VI) with HA was described using the charge neutralization model (CNM) [7,22], but according to quite high pH values (5)(6) in the present work, we assumed more cationic U(VI) species than one (i.e., UO 2 2+ ) in solution (see Table 3) [7]. The cation exchange method is performed with a strongly acidic cation exchange resin, where only cationic forms of U(VI), i.e.…”

Section: Complexation Of U(vi) With Ha: Cation Exchange Techniquementioning

confidence: 99%

“…The geology of the Ruprechtov site, including mineralogy and petrology, was described in detail in several contributions [4][5][6]. The natural accumulations of uranium, originating from the underlying granite, were identified within the clay environment, being accompanied with local organic matter accumulation.…”

Section: Introductionmentioning

confidence: 99%

Humic substances extraction, characterization and interaction with U(VI) at Ruprechtov site (CZ)

Červinka¹,

Ştamberg

Havlová

et al. 2011

Radiochimica Acta

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Humic substances / Complexation / Cation exchange / Charge neutralization model / Ruprechtov site / Czech Republic / U(VI)Summary. The extent of complexation between natural humic acid (HA) and uranium(VI) has been investigated at the Ruprechtov natural analogue site, Czech Republic. Natural HA was extracted from the clay sediments enriched by organic matter and then characterized for their elemental composition, UV/Vis and infrared spectroscopic properties, exchange capacity and protonation constants. Moreover, the reference sample HA-leonardite was selected and studied for comparison. Complexation between natural HA and U(VI) was studied using the cation exchange technique at pH 5-6. The experimental work was focused on study dependence of U(VI) complexation with HA: i) on the concentration of HA 1-40 mg/l, and ii) on the concentration of U(VI) 1 × 10 −5 -1 × 10 −7 M. The charge neutralization model (CNM) was used for evaluation of the experimental data, modified in a way, that the total charge was divided among the individual U(VI) species in solution under given conditions. The stability constant value was determined to be log β = 4.32 ± 0.50, LC = 50-60%, being independent on the HA concentration at U(VI) concentrations of 1 × 10 −4 M. On the other hand, a dependence on the stability constant for the different U(VI) concentrations was observed. At close to real conditions of the site (U(VI) = 1 × 10 −7 M and mHA = 5 mg/l) the stability constant log β = 6.16, LC = 50.3-52.7%.

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Carbon chemistry and groundwater dynamics at natural analogue site Ruprechtov, Czech Republic: Insights from environmental isotopes

Cited by 26 publications

References 15 publications

Global Isotope Hydrogeology―Review

Global Isotope Hydrogeology―Review

Hydrochemistry and isotopic characteristics of non-volcanic hot springs around the Miocene Kofu granitic complex surrounding the Kofu Basin in the South Fossa Magna region, central Honshu, Japan

Humic substances extraction, characterization and interaction with U(VI) at Ruprechtov site (CZ)

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