Published 2001
| Version v1
Book
The solubility of metallic selenium under anoxic conditions
- 1. Japan Atomic Energy Research Institute, Ibaraki (Japan)
- 2. Hokkaido University, Hokkaido (Japan)
Description
The solubility of metallic selenium was measured in a mixture of 0.1M-NaCl and 0.05M-N2H4 under anoxic conditions (O2 < 1 ppm) by both oversaturation and undersaturation methods. Equilibrium was attained in 40 days. The aqueous selenium species identified were HSe- at pH between 5 and 8, and Se42- at pH between 10 and 13, by UV-Vis absorption spectrometry. The solid phase was identified as Se(cr) by X-ray diffraction. The equilibrium constants of Se(cr) + H+ + 2e- = HSe and 4Se(cr) + 2e- Se42 were obtained as logK0 = -6.5±0.5 and logK0 = -16.8±0.5 respectively. The standard molar free energy of formation of HSe- and Se42- was determined to be (37.1±2.9) and (95.9±2.9) kJ/mol, respectively. Copyright (2001) Material Research Society
Additional details
Identifiers
- URL
- http://www.mrs.org/;
Publishing Information
- Publisher
- Materials Research Society
- Imprint Place
- Warrendale, PA (United States)
- ISBN
- 1-55899-598-6
- Imprint Title
- Scientific basis for nuclear waste management XXIV: Materials Research Society symposium proceedings: Volume 663
- Imprint Pagination
- 1232 p.
- Journal Page Range
- p. 1143-1149
- ISSN
- 0275-0112
Conference
- Title
- Scientific basis for nuclear waste management XXIV
- Dates
- 27-31 Aug 2000
- Place
- Sydney, NSW (Australia)
INIS
- Country of Publication
- United States
- Country of Input or Organization
- Australia
- INIS RN
- 34038846
- Subject category
- S54: ENVIRONMENTAL SCIENCES;
- Resource subtype / Literary indicator
- Conference, Numerical Data
- Descriptors DEI
- ANAEROBIC CONDITIONS; AQUEOUS SOLUTIONS; DISSOLUTION; EXPERIMENTAL DATA; FORMATION FREE ENERGY; PH VALUE; SELENIDES; SELENIUM; SELENIUM HYDRIDES; SOLUBILITY
- Descriptors DEC
- CHALCOGENIDES; DATA; DISPERSIONS; ELEMENTS; ENERGY; FREE ENERGY; HOMOGENEOUS MIXTURES; HYDRIDES; HYDROGEN COMPOUNDS; INFORMATION; MIXTURES; NUMERICAL DATA; PHYSICAL PROPERTIES; SELENIUM COMPOUNDS; SEMIMETALS; SOLUTIONS; THERMODYNAMIC PROPERTIES
Optional Information
- Notes
- 12 refs., 2 tabs., 4 figs.