Authors: Patrick Zastrow, Kevin Hicks, Mohsen Manjili, Marcia Silva* Regeneration and Reuse of Natural Porous Filter Material Following the Capture and Recovery of Phosphate Ions Authors: Patrick Zastrow, Kevin Hicks, Mohsen Manjili, Marcia Silva*

Eutrophication in Wisconsin waters Why It Matters Eutrophication in Wisconsin waters Closed Beach – Madison, WI http://rtwis.cee.wisc.edu/Project_Significance/Beach.jpg Veteran’s Park – Milwaukee, WI http://rtwis.cee.wisc.edu/Project_Significance/Beach.jpg https://cpb-u-w2.wpmucdn.com/blog.nus.edu.sg/dist/d/6738/files/2016/11/eutrohication-1k9tob2.png

Method: Regeneration and Recovery of Phosphorous To be viable, regenerated material must: Maintain >75% total adsorption capacity of initial sample Not desorb a detectable level of functional group ions

Looking Forward Reusing filtration material up to 10X before refunctionalizing Lowering costs of fabrication and filtration Work with local farm to test large- scale filtration Develop viable large-scale regeneration and recovery process Desorption Procedure - Sonication Saturation Procedure – Column Method

Acknowledgements We thank Nicholas Fults, Chris Kudlata, Louis Chapman, and Alice Lecus for support on general laboratory procedures and insightful discussions. This work was supported  by Kieser & Associates (grant N0. AAC1496) under a Great Lakes Protection Fund grant.

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