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Enhanced Non-Fouling Membranes for Water Purification

Develop anti-fouling osmosis membrane technology to purify contaminated waste water sources, reducing maintenance and chemical degradation. Coatings include graphene oxide and superhydrophilic nanoparticles. Testing and scaling up will be conducted for both reverse osmosis and forward osmosis.

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Enhanced Non-Fouling Membranes for Water Purification

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  1. Enhanced Non-Fouling Membranes for Water Purification and RecyclingSuperfund Research Program Small Business Water Innovation Progress in Research Session I – Sustainable Approaches to Remediation NIH-NIEHS SBIR Phase I Grant #: 1R43ES024625-01 Program Manager: Heather Henry PI/PL: David Battaglia (Lynntech) Email: david.battaglia@lynntech.com Subcontractor: Prof. Emmanuel Giannelis (Cornell University)

  2. Project Summary • Objective: Develop anti-fouling osmosis membrane technology for the purification of contaminated waste water sources • Areas Needing Improvement • Loss of water flow due to membrane pore plugging • Mineral scaling • Reduce membrane/system maintenance • Reduce/eliminate chemical degradation of the membrane • Solution: Enhance existing osmosis membranes using precise surface coatings • Graphene oxide (linked using polydopamine) • Superhydrophilic nanoparticles

  3. Membrane Fouling Liu et al., J. Mem. Sci., 2014 Lynntech Combination of Organic and Inorganic Foulants Alginate + Gypsum (CaSO4)

  4. Membrane Enhancement 1 µm 1 µm 1 µm • Polyamide Membrane • Common Osmosis Membrane • Forward Osmosis • Reverse Osmosis • Water Contact Angle = 70 • Polyamide/Polydopamine/ Graphene Oxide • Improved Stability Against Mineral Scaling • Water Contact Angle = 69 • Polyamide/Polydopamine/ Graphene Oxide/ Superhydrophilic Nanoparticles • Improved Stability Against Organic and Inorganic Foulants • Water Contact Angle = 13

  5. Membrane Testing • Testing Conditions • 12 Hr Initial Water • 48 Hr Alginate • 48 Hr Gypsum • 30 min Cleaning • 12 Hr Water Tested Foulants: Alginate, BSA, SWRM, CaSO4 Tested Membranes: Polyamide, Cellulose Acetate

  6. Next Steps • Membranes • Multiple types of osmosis membranes • Continue to enhance superhydrophilic nature • Scale up • Graphene Oxide Coating • Superhydrophilic nanoparticle coating • Testing • Reverse Osmosis • Forward Osmosis • Outside Testing • Waste water testing • 3rd Party Testing

  7. │ Thank you for your attendance and participation

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