Reagent adsorption on precious metals and alloys

ANYL 20

Somil C Mehta, scm2108@columbia.edu, NSF IUCR Center for Advanced Studies in Novel Surfactants, Langmuir Center for Colloid and Interfaces, Columbia University, Columbia University, 500W 120th street, # 911 Mudd, New York, NY 10027, DR. Nagaraj, Cytec Industries Inc., Stamford, CT, 06904, USA, and Ponisseril Somasundaran, ps24@columbia.edu, Industry/University Cooperative Research Center for Surfactants, Columbia University, 500 W 120th Street, 910 S.W. Mudd, New York, NY 10027.
Specific adsorption of reagents is primarily employed in many processes including mineral beneficiation, microelectronics and sensors development. In the case of precious metal/mineral extraction, most of the processes are based on only one reagent (xanthate derivatives). It is very important to come up with newer reagents in order to have efficient extraction. It would be useful to employ a method based on fundamental properties of reagents and metals adsorption to achieve a smaller set of better performing reagents. Open circuit potential (OCP) technique was used here to utilize the relationships between the potential change and the amount of reagents adsorbed on precious metals so that it can potentially be used to identify and develop better reagents. In addition, surface plasmon resonance technique was applied for investigating the effect of short term conditioning time. Also computer modeling of molecules for partial charge calculations was used to predict the adsorption behaviors.
 

Analytical Approaches: Electroanalytical Chemistry
8:30 AM-11:40 AM, Sunday, 10 September 2006 Moscone Center -- Room 124, Oral

Division of Analytical Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006