Soils and sediments are major reservoirs of organic matter (OM), whose dynamic turnover
has a major impact on carbon cycling and global climate. OM in soils and sediments is …

Biogeochemical cycling of iron is crucial to many environmental processes, such as ocean
productivity, carbon storage, greenhouse gas emissions and the fate of nutrients, toxic …

Mineral–microbe interactions play important roles in environmental change, biogeochemical
cycling of elements and formation of ore deposits. Minerals provide both beneficial (physical …

Iron (Fe) is the fourth most abundant element in the earth's crust and plays important roles in
both biological and chemical processes. The redox reactivity of various Fe (II) forms has …

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 …

Nitrogen removal through microorganisms is the most important pathway in constructed
wetlands (CWs). In this review, we summarize the microbial coupling mechanisms of …

Manganese oxide (MnOx) mediated ammonium (NH 4+) oxidation in wetlands is receiving
increased interest; however, the biochemical mechanisms of this process are vague due to …

Zero-valent iron (ZVI) is known to be an additive in facilitating waste treatment and improving
biogas production in anaerobic digestion (AD) systems. This review concentrates on the …

In natural anoxic environments, anoxygenic photosynthetic bacteria fix CO2 by
photoheterotrophy, photoautotrophy, or syntrophic anaerobic photosynthesis. Here, we …

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 …