Results 1 to 10 of about 142,937 (344)

Microbial degradation of citrate mediates sealing of cement cracks under anaerobic conditions relevant to radioactive waste disposal [PDF]

npj Materials Degradation
In radioactive waste repositories, cement is used for construction, backfill, and waste encapsulation. Over time, cracks may form, creating potential pathways for contaminant migration.
Natalie Byrd, Ananya Singh, Naji M. Bassil, Joe S. Small, Frank Taylor, Christopher Boothman, Dirk L. Engelberg, Sultan Mahmood, Tristan Lowe, Jonathan R. Lloyd, Katherine Morris   +10 more
doaj   +2 more sources

Nuclear Waste Disposal

Encyclopedia, 2023
Nuclear waste (like radioactive waste) is waste that contains, or is contaminated with, radionuclides, at activity concentrations greater than clearance levels set by the regulators, beyond which no further use is foreseen. Disposal is the emplacement of
Michael I. Ojovan
doaj   +2 more sources

The biogeochemical fate of nickel during microbial ISA degradation; implications for nuclear waste disposal. [PDF]

Sci Rep, 2018
Kuippers G, Boothman C, Bagshaw H, Ward M, Beard R, Bryan N, Lloyd JR.   +6 more
europepmc   +3 more sources

Microbially-Induced Carbonate Precipitation in Low pH Cement; Potential for Self-Healing in Radioactive Waste Geodisposal Systems [PDF]

ACS Omega
Ananya Singh, Natalie Byrd, Dirk Engelberg, Christopher Boothman, Samuel Shaw, Katherine Morris, Jonathan R. Lloyd   +6 more
doaj   +2 more sources

Interlink between solubility, structure, surface and thermodynamics in the ThO2(s, hyd)–H2O(l) system

Frontiers in Chemistry, 2022
The impact of temperature on a freshly precipitated ThO2(am, hyd) solid phase was investigated using a combination of undersaturation solubility experiments and a multi-method approach for the characterization of the solid phase.
Christian Kiefer, Thomas Neill, Thomas Neill, Nese Cevirim-Papaioannou, Dieter Schild, Xavier Gaona, Tonya Vitova, Kathy Dardenne, Jörg Rothe, Marcus Altmaier, Horst Geckeis   +10 more
doaj   +1 more source

Beryllium solubility and hydrolysis in dilute to concentrated CaCl2 solutions: thermodynamic description in cementitious systems

Frontiers in Nuclear Engineering, 2023
The solubility and hydrolysis of Be(II) was investigated from undersaturation conditions in alkaline, dilute to concentrated CaCl2 solutions (0.05–3.5 M). Experiments were performed with α-Be(OH)2(cr) under Ar atmosphere at T = (22 ± 2)°C.
Nese Çevirim-Papaioannou, Iuliia Androniuk, George Dan Miron, Marcus Altmaier, Xavier Gaona   +4 more
doaj   +1 more source

Combined X-ray absorption and SEM–EDX spectroscopic analysis for the speciation of thorium in soil

Scientific Reports, 2023
Mobility and bioavailability of radionuclides in the environment strongly depend on their aqueous speciation, adsorption behavior and the solubility of relevant solid phases. In the present context, we focus on naturally occurring Th-232 at a location in
Sanduni Ratnayake, Johannes Lützenkirchen, Nicolas Finck, Dieter Schild, Frank Heberling, Teba Gil-Díaz, Kathy Dardenne, Jörg Rothe, Horst Geckeis   +8 more
doaj   +1 more source

Implementation of cryogenic tender X-ray HR-XANES spectroscopy at the ACT station of the CAT-ACT beamline at the KIT Light Source

Journal of Synchrotron Radiation, 2022
The ACT experimental station of the CAT-ACT wiggler beamline at the Karlsruhe Institute of Technology (KIT) Light Source is dedicated to the investigation of radionuclide materials with radioactivities up to 1000000 times the exemption limit by various ...
Bianca Schacherl, Tim Prüssmann, Kathy Dardenne, Kirsten Hardock, Volker Krepper, Jörg Rothe, Tonya Vitova, Horst Geckeis   +7 more
doaj   +1 more source

Progress and Challenges of Materials and Methods for Uranium Extraction From Seawater

He huaxue yu fangshe huaxue, 2023
The ocean covers 70% of the earth’s area, and the seawater uranium is more than 1000 times that of terrestrial uranium ore. In order to increase the power generation and ensure the sustainable operation of nuclear power plants, the development of ...
TANG Xing-rui, HUANG Peng-ling, RUAN Hao-ming, TANG Li, GONG Xiang, DUAN Tao, CHEN Shu-sen, HE Rong, ZHU Wen-kun   +8 more
doaj   +1 more source

Cs Extraction from Chloride Media by Calixarene Crown-Ethers

Energies, 2022
Asse II salt mine, in Germany, contains low and intermediate-level radioactive waste that must be retrieved in the upcoming years. Potentially contaminated salts and brines will require treatment, with 137Cs being the main contaminant. Cs+ is problematic
Marie Simonnet, Thomas Sittel, Patrik Weßling, Andreas Geist   +3 more
doaj   +1 more source