1. Toxic Metals in Mine Tailings Dust Presented by: Paul Rheinheimer Acknowledgements: NASA Space Grant Consortium Susan Brew Susan Brew Brian Barbaris Brian Barbaris

2. Brian Barbaris, Dr. Eric Betterton, Dr. William Conant, Janae Csavina Dr. Song Gao, Shannon Reed, Paul Rheinheimer, Dr. Eduardo Saez, and Anna Wonashutz, Research Team Members

3. Health concerns: Respiratory Metals: As, Cd, Pb, Cu, water soluble ions (Cl -, SO 4 -, Na +, etc…) Project Focus: Mine Tailings Dust

4. Locations ASARCO Hayden Mine Tailings – coarse particles Active Smelter – fine particles

5. Locations Iron King Mine Tailings – coarse particles

6. Micro-Orifice-Uniform-Deposit- Impactor (MOUDI) 10-stage impaction plates 10-stage impaction plates Vacuum pump Vacuum pump Particle size captured ranges from 1-18 micrometers Particle size captured ranges from 1-18 micrometers

7. Scanning Mobility Particle Scanner (SMPS), Inductively Coupled Plasma – Mass Spectrometry (ICP-MS), and Ion Chromatography (IC) SMPS gives # concentrations of particles sized from 0 to 1 micrometer SMPS gives # concentrations of particles sized from 0 to 1 micrometer ICP-MS measures heavy metal concentrations from MOUDI filters ICP-MS measures heavy metal concentrations from MOUDI filters IC measures water soluble ions from MOUDI filters IC measures water soluble ions from MOUDI filters

9. SMPS Data at ASARCO Hayden, plot of particle distribution. (The measurements were made upwind of mine tailings and downwind of a slag heap ) Heavy metal concentrations at Iron King site.

10. Future Areas of Research Correlate data to wind speed and direction Correlate data to wind speed and direction Particle analysis by Scanning Electron Microscope Particle analysis by Scanning Electron Microscope As analysis by SEM Wind rose of Iron King

11. End of presentation. Thank you very much!