Results 11 to 20 of about 929 (201)

How well suited are current thermodynamic models to predict or interpret the composition of (Ba,Sr)SO4 solid-solutions in geothermal scalings?

Geothermal Energy, 2017
In this study, we report results of the analysis of a particularly interesting scaling sample from the geothermal plant in Neustadt-Glewe in northern Germany, which contained 19% Galena (PbS) and 81% of a heterogeneous assemblage of (Ba,Sr)SO4 crystals ...
Frank Heberling, Dieter Schild, Detlev Degering, Thorsten Schäfer   +3 more
doaj   +1 more source

Solubility and hydrolysis of Fe(ii) under hyperalkaline conditions [PDF]

RSC Advances
The speciation and solubility of iron under reducing, hyperalkaline conditions was investigated through undersaturation solubility experiments in combination with solid phase characterization by XRD.
Paul Quentin Fürst, Sven Hagemann, Neşe Çevirim-Papaioannou, Xavier Gaona, Marcus Altmaier, Horst Geckeis   +5 more
doaj   +1 more source

Long-term radionuclide retention in the near field: collaborative R&D studies within EURAD focusing on container optimisation, mobility, mechanisms and monitoring

EPJ Nuclear Sciences & Technologies, 2022
Within EURAD, targeted collaborative research activities are performed to further deepen understanding regarding the long-term behaviour of key components in the repository near-field, assess specific radionuclide retention processes as well as ...
Altmaier Marcus, Bertrand Johan, Churakov Sergey, Diomidis Nikitas   +3 more
doaj   +1 more source

Selective Americium Separation: New Insights into the Complexation of Trivalent f-Elements with SO3-Ph-BTBP [PDF]

EPJ Web of Conferences
In the Americium selective (AmSEL) process, the N-donor ligand 3,3’,3’’,3’’’-([2,2’-bipyridine]-6,6’-diylbis(1,2,4-triazine-3,5,6-triyl))tetrabenzenesulfonate (SO3-Ph-BTBP) is used to selectively strip Am(III) from a N,N,N’,N’-tetraoctyl diglycolamide ...
Sauerwein Fynn S., Sittel Thomas, Geist Andreas, Panak Petra J., Wilden Andreas, Modolo Giuseppe   +5 more
doaj   +1 more source

Fifteen Years of Radionuclide Research at the KIT Synchrotron Source in the Context of the Nuclear Waste Disposal Safety Case

Geosciences, 2019
For more than 120 years, systematic studies of X-ray interaction with matter have been the basis for our understanding of materials—both of natural or man-made origin—and their structure-function relationships.
Jörg Rothe, Marcus Altmaier, Ron Dagan, Kathy Dardenne, David Fellhauer, Xavier Gaona, Ernesto González-Robles Corrales, Michel Herm, Kristina O. Kvashnina, Volker Metz, Ivan Pidchenko, Dieter Schild, Tonya Vitova, Horst Geckeis   +13 more
doaj   +1 more source

Opportunities and challenges of applying advanced X-ray spectroscopy to actinide and lanthanide N-donor ligand systems

Journal of Synchrotron Radiation, 2022
N-donor ligands such as n-Pr-BTP [2,6-bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine] preferentially bind trivalent actinides (An3+) over trivalent lanthanides (Ln3+) in liquid–liquid separation. However, the chemical and physical processes responsible for
Tim Pruessmann, Peter Nagel, Laura Simonelli, David Batchelor, Robert Gordon, Bernd Schimmelpfennig, Michael Trumm, Tonya Vitova   +7 more
doaj   +1 more source

Permeability Characteristics of Bedrock Weathering Layer in Southern Coast Area of China

Shuitu baochi tongbao, 2022
[Objective] The permeability characteristics of the bedrock weathering layer were determined in order to propose a corresponding experimental method of hydraulic conductivity, and thereby provide a scientific reference for the performance assessment of ...
Xinyu Fu, Jiebiao Li, Qun Wu, Tongtong Li, Jingbo Zhao   +4 more
doaj   +1 more source

Design of a renewable hydroxyapatite-biocarbon composite for the removal of uranium(VI) with high-efficiency adsorption performance

Biochar, 2022
Highlights 1. The recyclable high-efficiency Hap@BC was prepared for U(VI) removal. 2. The adsorption capacity for U(VI) of Hap@BC-10% achieved 834.8 mg/g. 3. The U(VI) extraction efficiency reached 99.9% in dynamic adsorption. 4.
Jun Liao, Ting Xiong, Ling Ding, Ying Xie, Yong Zhang, Wenkun Zhu   +5 more
doaj   +1 more source

Cloud history can change water–ice–surface interactions of oxide mineral aerosols: a case study on silica [PDF]

Atmospheric Chemistry and Physics, 2020
Mineral aerosol particles nucleate ice, and many insights have been obtained on water freezing as a function of mineral surface properties such as charge or morphology.
A. Abdelmonem, S. Ratnayake, J. D. Toner, J. Lützenkirchen   +3 more
doaj   +1 more source

Thermodynamic description of Eu(NO3)3-NaNO3-H2O and Eu(NO3)3-Mg(NO3)2-H2O systems. Solubility experiments and full dissociation Pitzer models [PDF]

RSC Advances
Solubility studies in the systems Eu(NO3)3-NaNO3-H2O and Eu(NO3)3-Mg(NO3)2-H2O were conducted at T = (22 ± 2) °C including solid phase identification by X-ray powder diffraction and Schreinemakers' method. Iso-water activity data of both systems at 25 °C
F. Häusler, P. F. dos Santos, A. Lassin, X. Gaona, K. Garbev, S. Touzelet, Y. Cartigny, M. Altmaier, B. Madé   +8 more
doaj   +1 more source