A survey of biochars: Interactions with dissolved ammonia, nitrate, and phosphate

Presented by Colosky actually June 2013

Return to the Past Events page

Download the slides from this presentation

Previous biochar (BC) studies indicate that BC-amended soils increases crop production through an interaction with in-soil nutrients such as nitrogen (N) and phosphorus (P). Observed affects include decreasing N leachate and removing P from liquid solution. No study as of yet has systematically surveyed BCs from various production and parent materials. Results of a BC assessment study may lead to a better understanding of the mechanism by which BC enhances soil quality and how BC can be used in engineered systems. Our study examined the ammonia (NH3), nitrate (NO3) and phosphate (PO4) sorption potentials of 30+ BCs produced from different production processes and parent materials. We performed batch equilibrium sorption experiments, where BCs were submerged in NH3, NO3, and PO4 solutions. Results indicate that each BC is different in chemical interactions with in-solution NH3, NO3, and/or PO4.