ACS Symposium: Sustainable Supply of Critical Materials - Addressing the Fundamental Challenges in Separation Science & Engineering

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By Mamadou Diallo, CalTech

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ACS Symposium: Sustainable Supply of Critical Materials - Addressing the Fundamental Challenges in Separation Science & Engineering

  1. 1. Sustainable Supply of Critical Materials: Addressing the Fundamental Challenges in Separation Science and Engineering ACS Presidential Symposium Tuesday August 21, 2012 Philadelphia, PA, USA
  2. 2. Mamadou DialloAssociate Professor and Director of theLaboratory of Advanced Materials and Systemsfor Water Sustainability, Graduate School of Energy,Environment, Water and Sustainability (EEWS), KAISTVisiting Faculty in Environmental Science and Engineering,Division of Engineering and Applied Science, CaltechChief Technology Officer and Founder of AquaNano, LLC
  3. 3. Session B Program• Sustainable Supply of Critical Materials: The Role of Separation Science and Engineering (Setting the Stage) – Scientific Grand Challenges – Education and Training – Knowledge/Technology Transfer and Innovation• Ensuring the Sustainable Supply of Critical Materials: Overview of Recent Advances in Separation Science and Engineering (3 Presentations)• Moderated Panel: Rethinking the Role of Separation Science and Engineering—Reduce, Recycle, Repurpose!• Concluding Remarks
  4. 4. Sustainable Supply of Critical Materials: Sources, Extraction, Recovery and Purification Computer Circuit Boards as Sources of Critical Materials (Johnson et al. Environ. Sci. Technol. 2007, 41, 1759-1765)
  5. 5. Extraction and Purification of Critical Materials: The Separations Science Toolbox• Established Processes • Emerging/New Processes – Solvent Extraction (SE) – SE using Ionic Liquids – Ion Exchange – Affinity Membranes – Sorption – Magnetic Separations – Chromatography – Dendrimer Enhanced – Dissolution Filtration – Crystallization – Electrowinning – Pyrometallurgy
  6. 6. Extraction and Purification of Critical Materials: Scientific Grand Challenges• Design and synthesize high capacity, recyclable and robust separation materials (e.g. chelating ligands, ionic liquids, ion exchange media and affinity membranes) that can – Selectively extract critical materials from complex aqueous solutions (e.g., highly acid or saline media) – Be seamlessly integrated with existing separation equipment including (i) packed bed reactors, (ii) pressure vessels, (iii) clarifiers and (iii) membrane modules and systems.
  7. 7. Sustainable Supply of Critical Materials: Workforce Education and Training• There has been a steady decline in the number of students major in mining, extractive metallurgy and related fields dealing with the separation science and engineering (SSE) of critical materials.• Need to educate and train the next generation of scientists and engineers in the SSE of critical materials. Caltech Resnick Institute Report on Critical Materials (Available online at http://resnick.caltech.edu/programs/critical-materials/index.html)
  8. 8. Sustainable Supply of Critical Materials: Knowledge/Technology Transfer and Innovation• Grand Challenge:“ Converge Knowledge and Technology to Build an Innovation Ecosystem for the Sustainable Supply of Critical Materials and Earth-Abundant Alternatives”
  9. 9. Session B Program (Continuation)• Ensuring the Sustainable Supply of Critical Materials: Overview of Recent Advances in Separation Science and Engineering (3 Presentations)• Moderated Panel: Rethinking the Role of Separation Science and Engineering—Reduce, Recycle, Repurpose!• Concluding Remarks

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