Abstract Nitrate (NO 3−) pollution in water and wastewater has become a serious global
issue. Biological denitrification, which reduces NO 3− to N 2 (nitrogen gas) by denitrifying …

Autotrophic denitrification (AuDen) is an efficient, convenient and eco-friendly biological
process for the treatment of nitrate-contaminated organic-deficient waters. AuDen can be …

In this study, the ecological floating bed supporting with zero-valent iron (ZVI) and plant
biomass (EFB-IB) was constructed to improve nitrogen removal from low-polluted water. The …

The iron‑nitrogen (Fesingle bond N) cycle driven by microbes has great potential for treating
wastewater. Fe is a metal that is frequently present in the environment and one of the crucial …

Iron sulphides, mainly in the form of mackinawite (FeS), pyrrhotite (Fe 1-x S, x= 0–0.125) and
pyrite (FeS 2), are the most abundant sulphide minerals and can be oxidized under anoxic …

Floating treatment wetlands (FTWs) are increasingly gaining popularity due to a set of
valuable features like wastewater remediation under varied conditions, ecosystem quality …

As a newly identified nitrogen loss pathway, the nitrate-dependent ferrous oxidation (NDFO)
process is emerging as a research hotspot in the field of low carbon to nitrogen ratio (C/N) …

Denitrification with non-organic electron donors for treating low C/N ratio wastewater has
attracted growing interests. Hydrogen, reduced sulfur compounds and ferrous ions are …

As the dominating parts of biological systems, microorganisms mediate the nitrogen removal
process. Iron ion included Fe (II), Fe (III), and zero-valent iron (Fe 0), enhanced nitrogen …

Partial nitrification and anammox process is considered to be a good choice for nitrogen
removal. Nevertheless, it is difficult to achieve in low ammonia wastewater because of the …