Aluminum Solubility in Complex Electrolytes - 13011

Conference · Mon Jul 01 00:00:00 EDT 2013

OSTI ID:22224823

Agnew, S. F. ^[1]; Johnston, C. T. ^[2]

---

1. Columbia Energy and Environmental Services, Inc., 1806 Terminal Dr., Richland, WA 99354 (United States)
2. Dept. of Crop, Soil, and Environmental Sciences, Purdue University, West Lafayette, IN 47907 (United States)

Predicting aluminum solubility for Hanford and Savannah River waste liquids is very important for their disposition. It is a key mission goal at each Site to leach as much aluminum as practical from sludges in order to minimize the amount of vitrified high level waste. And it is correspondingly important to assure that any soluble aluminum does not precipitate during subsequent decontamination of the liquid leachates with ion exchange. This report shows a very simple and yet thermodynamic model for aluminum solubility that is consistent with a wide range of Al liquors, from simple mixtures of hydroxide and aluminate to over 300 Hanford concentrates and to a set of 19 Bayer liquors for temperatures from 20-100 deg. C. This dimer-dS{sub mix} (DDS) model incorporates an ideal entropy of mixing along with previous reports for the Al dimer, water activities, gibbsite, and bayerite thermodynamics. We expect this model will have broad application for nuclear wastes as well as the Bayer gibbsite process industry. (authors)

• Research Organization: WM Symposia, 1628 E. Southern Avenue, Suite 9-332, Tempe, AZ 85282 (United States)
• OSTI ID: 22224823
• Report Number(s): INIS-US-13-WM-13011; TRN: US14V0256045778
• Resource Relation: Conference: WM2013: Waste Management Conference: International collaboration and continuous improvement, Phoenix, AZ (United States), 24-28 Feb 2013; Other Information: Country of input: France; 19 refs.
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ALUMINATES
ALUMINIUM
DECONTAMINATION
DIMERS
ELECTROLYTES
ENTROPY
GIBBSITE
HIGH-LEVEL RADIOACTIVE WASTES
HYDROXIDES
LEACHATES
LEACHING
LIQUIDS
MIXING
PRECIPITATION
SLUDGES
THERMODYNAMIC MODEL
THERMODYNAMICS
WATER