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Academic literature on the topic 'Geochemist's workbench'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2025

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Journal articles on the topic "Geochemist's workbench"

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Klunk, Marcos Antonio, Leonardo Hax Damiani, Gustavo Feller, Rommulo Vieira Conceição, Mara Abel, and Luiz Fernando De Ros. "Geochemical modeling of diagenetic reactions in Snorre Field reservoir sandstones: a comparative study of computer codes." Brazilian Journal of Geology 45, suppl 1 (2015): 29–40. http://dx.doi.org/10.1590/2317-4889201530145.

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ABSTRACTDiagenetic reactions, characterized by the dissolution and precipitation of minerals at low temperatures, control the quality of sedimentary rocks as hydrocarbon reservoirs. Geochemical modeling, a tool used to understand diagenetic processes, is performed through computer codes based on thermodynamic and kinetic parameters. In a comparative study, we reproduced the diagenetic reactions observed in Snorre Field reservoir sandstones, Norwegian North Sea. These reactions had been previously modeled in the literature using DISSOL-THERMAL code. In this study, we modeled the diagenetic reac

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Moog, Helge C., Tina Scharge, Holger Seher, et al. "THEREDA – Thermodynamic Reference Database." Safety of Nuclear Waste Disposal 1 (November 10, 2021): 157–58. http://dx.doi.org/10.5194/sand-1-157-2021.

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Abstract. Part of the process to ensure the safety of radioactive waste disposal is the predictive modeling of the solubility of all relevant toxic components in a complex aqueous solution. To ensure the reliability of thermodynamic equilibrium modeling as well as to facilitate the comparison of such calculations done by different institutions, it is necessary to create a mutually accepted thermodynamic reference database. To meet this demand several institutions in Germany joined efforts and created THEREDA (Moog et al., 2015). THEREDA is a suite of programs at the base of which resides a rel

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Moog, Helge C., Tina Scharge, Holger Seher, et al. "THEREDA – Thermodynamic Reference Database." Safety of Nuclear Waste Disposal 2 (September 6, 2023): 157. http://dx.doi.org/10.5194/sand-2-157-2023.

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Abstract. Part of the process to ensure the safety of radioactive waste disposal is the predictive modeling of the solubility of all relevant toxic components in a complex aqueous solution. To ensure the reliability of thermodynamic equilibrium modeling and to facilitate the comparison of such calculations done by different institutions, it is necessary to create a mutually accepted thermodynamic reference database. To meet this demand, several institutions in Germany joined efforts and created the Thermodynamic Reference Database (THEREDA; Moog et al., 2015). THEREDA is a suite of programs at

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Cleverley, James S., and Evgeniy N. Bastrakov. "K2GWB: Utility for generating thermodynamic data files for The Geochemist's Workbench® at 0–1000°C and 1–5000bar from UT2K and the UNITHERM database." Computers & Geosciences 31, no. 6 (2005): 756–67. http://dx.doi.org/10.1016/j.cageo.2005.01.007.

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Weyand, Torben, Holger Seher, and Guido Bracke. "Geochemical benchmark tests to validate the conversion of thermodynamic data for TOUGHREACT." Safety of Nuclear Waste Disposal 1 (November 10, 2021): 161–62. http://dx.doi.org/10.5194/sand-1-161-2021.

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Abstract. According to the ongoing site selection process for a repository for high-level radioactive waste in Germany, rock salt, clay and crystalline rock are possible host rocks. The pore water of these rocks contains saline solutions with high ionic strengths. To model the speciation and/or migration of radionuclides in long-term safety analyses for nuclear waste disposal, a geochemical code that includes thermodynamic data suitable for saline solutions is needed. Thermodynamic equilibrium in saline solutions with high ionic strengths is usually modelled using the Pitzer approach (Pitzer,

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Jantzen, Carol M., and Cory L. Trivelpiece. "Uranium Dissolution and Geochemical Modeling in Anoxic and Oxic Solutions." MRS Advances 2, no. 13 (2017): 705–10. http://dx.doi.org/10.1557/adv.2017.58.

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ABSTRACTHigh Level Waste (HLW) glasses are to be stored in deep geologic repositories around the world. Some potential repository geologies have oxidizing groundwaters while some have reducing or anoxic groundwaters. The differences in the oxidizing potential of the groundwater, expressed as groundwater Eh, which has a profound impact on the release of multivalent species such as iron and uranium from the glass. Static leach testing of monolithic glass samples (ASTM C1220) doped with uranium were performed at 90°C in an Ar glovebox under anoxic and oxic conditions. Tests were performed in both

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Charykova, M. V., K. L. Ushakova, A. Holzheid, V. G. Krivovichev, N. M. Efimenko, and N. V. Platonova. "Thermodynamics of Arsenates, Selenites, and Sulphates in the Zone of Oxidation of Sulfide Ores. XV. Solubility of the Synthetic Analogue of Mandarinoite at 25 °C." Zapiski RMO (Proceedings of the Russian Mineralogical Society) CLII, no. 4 (2023): 1–15. http://dx.doi.org/10.31857/s0869605523040032.

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The aim of this study is the synthesis of two iron(III) selenites: Fe2(SeO3)3·5H2O (an analogue of the mineral mandarinoite) and Fe2(SeO3)3·3H2O, as well as the study of their solubility. Identification of obtained samples was carried out using the X-ray powder diffractometry and the energy dispersive electron microprobe analysis. Solubility was determined by isothermal saturation at 25 °C and atmospheric pressure. To suppress the hydrolysis of Fe3+-ions and prevent the precipitation of iron hydroxide, the experiment was performed in solutions of nitric or sulfuric acid. Obtained compositions

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Šváb, Marek, Kateřina Sukdolová, and Martina Švábová. "Competitive adsorption of toxic metals on activated carbon." Open Chemistry 9, no. 3 (2011): 437–45. http://dx.doi.org/10.2478/s11532-011-0021-y.

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AbstractCompetitive adsorption of zinc and copper on activated carbon is studied in this article. Main aim was to suggest an advanced model for competitive adsorption of both metals considering pH influence and precipitation. A surface-complexation approach was employed for the modeling. Two models were considered: simple adsorption and ion exchange. System “The Geochemists Workbench” was used for calculation of both static and dynamic adsorption tasks. From the batch experiments, concentration of four types of sorbing sites on the carbon surface and its protonation and sorption constants were

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KLUNK, M. A., S. DASGUPTA, S. B. SCHRÖPFER, B. V. G. NUNES, and P. R. WANDER. "COMPARATIVE STUDY OF GEOCHEMICAL SPECIATION MODELING USING GEODELING SOFTWARE." Periódico Tchê Química 16, no. 31 (2019): 816–22. http://dx.doi.org/10.52571/ptq.v16.n31.2019.826_periodico31_pgs_816_822.pdf.

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Geochemical modeling is used to understand water-rock interactions that occur in the sedimentary basin. Activities of aqueous species are usually calculated using the Davies equation, Debye-Hückel equation, B-Dot or Newton-Raphson. We perform a comparative study of geochemical speciation using three different software: PHREEQCTM, Geochemist's WorkbenchTM (GWB) and GEODELING (own code). Details of each software are carefully analyzed, taking into account the distribution, mobility, and availability of chemical species in geological environments. We can observe very similar results in speciation

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Shevalier, Maurice, Chantsalmaa Dalkhaa, Pauline Humez, et al. "Coupling of TOUGHREACT-Geochemist Workbench (GWB) for Modeling Changes in the Isotopic Composition of CO2 Leaking from a CCS Storage Reservoir." Energy Procedia 63 (2014): 3751–60. http://dx.doi.org/10.1016/j.egypro.2014.11.404.

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Books on the topic "Geochemist's workbench"

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Bethke, Craig. The geochemist's workbench: A users guide to Rxn, Act2, Tact, React, and Gtplot. C. Bethke, 1992.

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Conference papers on the topic "Geochemist's workbench"

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Muñoz, Andrés G., and Dieter Schild. "Corrosion of Steel in High-level Radioactive Waste Rock Repositories: Kinetics and Thermodynamics." In CORROSION 2018. NACE International, 2018. https://doi.org/10.5006/c2018-11707.

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Abstract The corrosion of stainless steel containers for the disposal of radioactive spent fuels can be triggered, provided it comes into contact with waters of high salinity in geological formations. Apart from its extremely aggressive environment, the repository is characterized by high hydrostatic and ground pressures (p &gt; 100 bar). Also, temperatures of 100-150°C can be reached due to the release of fission heat during the first 150 years of disposal. The corrosion of stainless steel AISI 309S, one of the recommended materials, was investigated in a representative salt brine by a sp

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Guo, Jingni, Yu Wang, Ziling Zhou, et al. "Summary of Methods for Studying the Chemical States of Nuclides In Nuclear Energy Systems." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-90873.

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Abstract The chemical states of nuclides affect their physical and chemical properties including thermal conductivity, melting point, adsorption and desorption behavior, diffusion process, and chemical reactivity. It is an important issue in nuclear energy systems and spent fuel reprocessing. In this review, we summarize the theoretical calculations and experimental measurements to determine the chemical states of nuclides in nuclear energy systems. Software such as FactSage, HSC Chemistry and The Geochemist’s Workbench are generally used to determine the macroscopic-scale thermodynamic parame

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Reports on the topic "Geochemist's workbench"

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Dyer, J. A. Software Quality Assurance Plan for the Geochemist’s Workbench®. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1485270.

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