Development and validation of a multi-site model for adsorption of metals by mixtures of minerals: 1, Overview and preliminary results

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:5641367

Siegel, M D ^[1]; Tripathi, V S ^[2]; Rao, M G ^[3]; Ward, D B ^[4]

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1. Sandia National Labs., Albuquerque, NM (United States)
2. Science Applications International Corp., McLean, VA (United States)
3. Howard Univ., Washington, DC (United States)
4. New Mexico Univ., Albuquerque, NM (United States)

The possibility of formulating and validating a multi-site, multi- solute model for prediction of contaminant transport in groundwaters is being evaluated through experiments with simple analog systems. These systems consist of mixtures of well-characterized synthetic and natural materials in which the effects of sorption by ion exchange and amphoteric sites are isolated. Initial results are reported for studies of lead sorption by mixtures of goethite and montmorillonite, and Ni-Sr and Pb-Sr ion exchange by montmorillonite. The results of studies of simple clay-oxide mixtures indicate that the pH-dependent sorption behavior of Ni by mixtures of minerals containing amphoteric sites can be predicted from the properties of the component minerals.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789; AC05-84OR21400; AC05-76OR00033; AC06-76RL01830
• OSTI ID: 5641367
• Report Number(s): SAND-92-0532C; CONF-920761-3; ON: DE92009057
• Resource Relation: Conference: 7. water-rock interaction conference, Park City, UT (United States), 9-23 Jul 1992
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
ENVIRONMENTAL TRANSPORT
MATHEMATICAL MODELS
GOETHITE
SORPTIVE PROPERTIES
METALS
MONTMORILLONITE
ADSORPTION
GROUND WATER
ION EXCHANGE
LEAD
MINERALS
NICKEL
POLLUTANTS
STRONTIUM
ALKALINE EARTH METALS
CLAYS
ELEMENTS
HYDROGEN COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MASS TRANSFER
MATERIALS
OXIDE MINERALS
OXYGEN COMPOUNDS
SORPTION
SURFACE PROPERTIES
TRANSITION ELEMENTS
WATER
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
990200 - Mathematics & Computers