Congratulations to Chelsey Shepsko and Hang Dong for earning their Ph.D.’s in 2019!
![](https://derickgbrown.com/wp-content/uploads/2019/07/Chelsey.jpg)
Chelsey Shepsko
Dissertation: “Advancement of the Hybrid Ion Exchange Nitrogen and Phosphate (HIX-NP) Recovery from Waste Water and a New Approach to Brine-Free Nitrate Removal”
![](https://derickgbrown.com/wp-content/uploads/2019/07/Hang_Dong2.jpg)
Hang Dong
Dissertation: “Hybrid Ion Exchange Process Driven by Carbon Dioxide”