Boosting the denitrification efficiency of iron-based constructed wetlands in-situ via plant biomass-derived biochar: Intensified iron redox cycle and microbial responses

• Published in: Water research (Oxford) Vol. 253; p. 121285
• Main Authors: Fan, Yuanyuan, Sun, Shanshan, Gu, Xushun, Zhang, Manping, Peng, Yuanyuan, Yan, Pan, He, Shengbing
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.04.2024
• Subjects: bioavailability; Biochar; Biomass; bioremediation; Carbon; Charcoal; Constructed wetlands; Denitrification; denitrifying microorganisms; Electron transfer; Fe (III)/Fe (II) cycle; Geobacter; Iris pseudacorus; Iron - chemistry; iron absorption; Nitrate removal; nitrates; Nitrogen; Oxidation-Reduction; Plant biomass; Shewanella; species; wastewater; water; Wetlands; EDC; EAC; Plant biomass; Electron transfer; Biochar; ZVI; Nitrate removal; ETC; Constructed wetlands; MEO; IRB; Fe (III)/Fe (II) cycle; MER; IOB; CWs

•Biomass and its derived biochar addition enhanced iron scraps bioavailability.•Biochar as electron shuttle sustains a sustainable Fe-N electron transfer.•BC-ICW performed better and longer-lasting TN removal capacity.•Electroactive microbes and autotrophic denitrifiers were enriched in BC-ICW.•Func...