Adsorption of ammonium in aqueous solutions by pine sawdust and wheat straw biochars.

Ammonium (NH) is a common form of reactive nitrogen in wastewater, and its discharge to water bodies can lead to eutrophication. This study was conducted to understand NH adsorption mechanisms of pine sawdust and wheat straw biochars in aqueous solutions and the factors affecting NH removal. Biochars were produced by pyrolysing pine sawdust at 300 °C (PS300) and 550 °C (PS550) and wheat straw at 550 °C (WS550).