Enhanced sludge processing of HLW: Hydrothermal oxidation of chromium, technetium, and complexants by nitrate. 1998 annual progress report | Zendy

S. J. Buelow | Zendy; Jeanne M. Robinson | Zendy

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Enhanced sludge processing of HLW: Hydrothermal oxidation of chromium, technetium, and complexants by nitrate. 1998 annual progress report

Author(s) -

S. J. Buelow,

Jeanne M. Robinson

Publication year - 1998

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/13633

Subject(s) - chromium , hydrothermal circulation , dissolution , hydroxide , leaching (pedology) , alkalinity , chemistry , nuclear chemistry , nitrate , radiochemistry , environmental science , inorganic chemistry , chemical engineering , soil water , organic chemistry , soil science , engineering

'The objective of this project is to develop the scientific basis for hydrothermal separation of chromium from High Level Waste (HLW) sludges. The worked is aimed at attaining a fundamental understanding of chromium speciation, oxidation/reduction and dissolution kinetics, reaction mechanisms, and transport properties under hydrothermal conditions in both simple and complex salt solutions that will ultimately lead to an efficient chromium leaching process. This report summarizes the research over the first 1.5 years of a 3 year project. The authors have examined the dissolution of chromium hydroxide using different oxidants as a function of temperature and alkalinity. The results and possible applications to HLW sludges are discussed

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