Search Results - "Dohrmann, R"

Cation exchange capacity methodology II: A modified silver–thiourea method by Dohrmann, R.

“…The silver–thiourea method for the determination of the cation exchange capacity (CEC) has been critically examined. The chemical instability of the exchange…”
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SEM study of the early stages of Fe-bentonite corrosion—The role of naturally present reactive silica by Kaufhold, S., Schippers, A., Marx, A., Dohrmann, R.

“…•First time short-term corrosion observation using electron microscopy.•First time systematically considering the role of soda soluble silica (SSS).•Short-term…”
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About differences of swelling pressure — dry density relations of compacted bentonites by Kaufhold, S., Baille, W., Schanz, T., Dohrmann, R.

“…The swelling capacity is one of the most characteristic properties of bentonites. This property, along with others, made bentonite a candidate material for the…”
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The variable charge of dioctahedral smectites by Kaufhold, S., Dohrmann, R.

“…[Display omitted] ► Different methods for the quantification of the variable charge of smectites are compared. ► The CEC increases from pH 6 to 9 despite the…”
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Stabilization of Low-Order Mixed Finite Elements for the Stokes Equations by Bochev, Pavel B., Dohrmann, Clark R., Gunzburger, Max D.

“…We present a new family of stabilized methods for the Stokes problem. The focus of the paper is on the lowest order velocity-pressure pairs. While not LBB…”
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Stability of bentonites in salt solutions II. Potassium chloride solution — Initial step of illitization? by KAUFHOLD, S, DOHRMANN, R

“…Bentonites are supposed to be suitable materials for the production of geotechnical barriers in high level radioactive waste (HLRW) repositories if the…”
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Quantification of the mineralogical composition of clays using FTIR spectroscopy by Kaufhold, S., Hein, M., Dohrmann, R., Ufer, K.

“…A new method for the quantification of mineral mixtures (rocks) based on IR spectroscopy was established which is based on manual pattern addition. The graph…”
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Three new, quick CEC methods for determining the amounts of exchangeable calcium cations in calcareous clays by Dohrmann, R, Kaufhold, S

“…The cation exchange capacity (CEC) is one of the most important properties of clays in terms of their performance in both natural and technical processes. For…”
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Methods for Determination of the Layer Charge of Smectites: A Critical Assessment of Existing Approaches by Christidis, G. E., Chryssikos, G. D., Derkowski, A., Dohrmann, R., Eberl, D. D., Joussein, E., Kaufhold, S.

“…Layer charge is an important property of 2:1 phyllosilicates originating from isomorphic substitutions in the structure, from vacancies in the octahedral sheet…”
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N2-BET specific surface area of bentonites by KAUFHOLD, S, DOHRMANN, R, KLINKENBERG, M, SIEGESMUND, S, UFER, K

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Cation exchange capacity methodology III: Correct exchangeable calcium determination of calcareous clays using a new silver–thiourea method by Dohrmann, R.

“…Cation exchange capacity (CEC) is a fundamental property of clays and soils. Determination of CEC for samples that contain Ca-carbonate minerals, such as…”
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Quantitative phase analysis of bentonites by the Rietveld method by Ufer, Kristian, Stanjek, H, Roth, G, Dohrmann, R, Kleeberg, R, Kaufhold, S

“…Thirty six bentonite samples from 16 different locations were examined in order to demonstrate the applicability of a new Rietveld description approach for…”
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Detachment of colloidal particles from bentonites in water by Kaufhold, S., Dohrmann, R.

“…Bentonites are currently investigated as geotechnical barrier for sealing radioactive waste e.g. in HLRW repositories (HLRW = high level radioactive waste)…”
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Traditional and novel methods for estimating the layer charge of smectites by Czímerová, A., Bujdák, J., Dohrmann, R.

“…Several methods for characterizing layer charge of smectites were compared. Ten samples of various Na +- and Li +-saturated smectites (four montmorillonites,…”
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Multiple ionization of atom clusters by intense soft X-rays from a free-electron laser by Möller, T, Wabnitz, H, Bittner, L, de Castro, A. R. B, Döhrmann, R, Gürtler, P, Laarmann, T, Laasch, W, Schulz, J, Swiderski, A, von Haeften, K, Faatz, B, Fateev, A, Feldhaus, J, Gerth, C, Hahn, U, Saldin, E, Schneidmiller, E, Sytchev, K, Tiedtke, K, Treusch, R, Yurkov, M

“…Intense radiation from lasers has opened up many new areas of research in physics and chemistry, and has revolutionized optical technology. So far, most work…”
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Stability of bentonites in salt solutions | sodium chloride by Kaufhold, S., Dohrmann, R.

“…Highly saline solutions are expected to play an important role in long term safety assessment of bentonite buffer for storage of radioactive waste…”
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Mg and silica release in short-term dissolution tests in bentonites by Kaufhold, S., Dohrmann, R., Degtjarev, A., Koeniger, P., Post, V.

“…The investigation of the release of elements/structural cations from bentonites is important for high-level radioactive waste research. Smectites, the main…”
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A stabilized finite element method for the Stokes problem based on polynomial pressure projections by Dohrmann, Clark R., Bochev, Pavel B.

“…A new stabilized finite element method for the Stokes problem is presented. The method is obtained by modification of the mixed variational equation by using…”
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Interaction of magnesium cations with dioctahedral smectites under HLRW repository conditions by Kaufhold, S, Dohrmann, R, Ufer, K

“…In some real and up-scale tests using high-level radioactive waste (HLRW), Mg accumulation was observed in smectites at the contact of heated Fe or Cu metal…”
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Stability of bentonites in salt solutions III — Calcium hydroxide by Kaufhold, S., Dohrmann, R.

“…The prerequisite for the usage of bentonites as a geotechnical barrier in HLRW repositories is the stability of the bentonite under the conditions expected. In…”
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