Washington Academy of Sciences

Calendar of Events
Please check this page for news of coming events of WAS or the Affiliates

Meetings of the WAS Board of Managers

Usually held the second Thursday of the month in Conference Room 207 at 7:00 PM. (Check this page for exceptions)

AAAS Building
1200 New York Avenue, N.W., Washington, D.C. 20005
Telephone: 202-326-8975
Please use the 12th & H Street entrance

The Washington DC Section of SME proudly presents

 Nedal T. Nassar – Anthropogenic cycles of metals: case studies of the platinum-group elements

The platinum-group elements (PGEs) are among the rarest elements in Earth’s upper continental crust, yet each plays an important role in modern society. Despite their technological importance, little has been published on how much is lost during their extraction, processing, use, and recycling. Utilizing the principles of material flow analysis, this presentation provides estimates of global stocks and flows, losses, and recoveries of Pt, Pd, Rh, Ru and Ir at each life cycle stage. Results indicate that PGE losses are greatest at the first and last life cycle stages, namely at concentration and at the end?of?life. On a relative basis, losses as a percentage of primary production across the PGEs range from approximately 23–38% on the supply?side and from 33–45% on the manufacturing, use, and disposal?side. There are, however, notable differences across both the life cycle stages and the PGEs.

Date:Tuesday – February 9, 2016
Time : Social Hour 11:30 – 11:50 am
Section Business/Luncheon 12:00 – 1:30 pm
Location: Clyde’s Restaurant at Tyson’s Corner
8332 Leesburg Pike, Vienna, VA 22182
Choice: Roasted Chicken, Salmon, or Vegetarian Ravioli
Cost: $27 for DC Section Members; $32 for guests
RSVP: Please reply by email to George K. Schuler at by noon February 8, 2016