PME Special Seminar - William Tarpeh

Electrochemical Wastewater Refining: Using Reactive Separations to Control Microenvironments and Valorize Pollutants

Over the past century, humans have altered the global nitrogen cycle so drastically that managing nitrogen has emerged as a grand engineering challenge and urgent need. The emissions-intensive Haber-Bosch process for industrial fertilizer production, which converts nitrogen gas into ammonia, outpaces wastewater nitrogen removal due to fertilizer runoff and 80% of wastewater being discharged without treatment. Refining nitrate and ammonia into valuable products through reactive separations, which integrate catalysis and separations, is a useful approach for addressing both water pollution and chemical manufacturing. For example, selective membranes and adsorbents can be leveraged to control catalytic performance by tuning microenvironments near catalyst active sites. This seminar will focus on recent work designing nitrogen-selective processes, materials, and molecular mechanisms to systematically probe and valorize real wastewaters.