Autotrophic denitrification filter prepared using gasification coarse slag and pyrite: Physicochemical characteristics and performance removal of nitrogen

Conventional heterotrophic denitrification processes face challenges in achieving the requirements of sustainable development goals due to their dependence on external organic carbon sources and the risk of secondary pollution. In this study, the nitrogen removal performance of a sulfur autotrophic denitrification filter prepared from gasification coarse slag (GCS) and pyrite was evaluated, and its underlying mechanisms were elucidated using microbial community, EDS-SEM, BET, and FT-IR analyses.