Aqueous precipitation: Population balance modeling and control in multi-cation systems
- Sandia National Labs., Albuquerque, NM (United States)
Efficient separation of metal species from aqueous streams by precipitation techniques requires a fundamental understanding of the processes that occur during precipitation. These processes include particle nucleation, particle growth by solute deposition, agglomerate formation, and agglomerate breakup. Population balance method has been used to develop a kinetic model that accounts for these competing kinetic processes. The usefulness of the model is illustrated through its application to precipitation of yttrium hydroxynitrate, YHN. Kinetic parameters calculated from the model equations and system-specific solution chemistry are used to describe several aspects of the effect of pH on YHN precipitation. Implications for simultaneous precipitation of more than one cation type are discussed with examples. Effects of solution chemistry, precipitator design, and solvent choice are considered.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States); Ames Lab., IA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 236058
- Report Number(s):
- SAND--96-0746C; CONF-960631--1; ON: DE96008251
- Country of Publication:
- United States
- Language:
- English
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