New environmentally friendly way to turn wastewater into valuable ammonia.

A new catalyst reduces nitrate concentrations in wastewater, and further refinement could make it drinkable.

Reaction set-up
Rice University engineers have designed a catalyst of ruthenium atoms in a copper mesh to extract ammonia and fertiliser from wastewater. The process would also reduce carbon dioxide emissions from traditional industrial production of ammonia. Credit: Jeff Fitlow/Rice University