Efficient catalytic As(III) oxidation on the surface of ferrihydrite in the presence of aqueous Mn(II)

Water Research, Journal Year: 2017, Volume and Issue: 128, P. 92 - 101

Published: Oct. 23, 2017

Language: Английский

---

Manganese-Driven Carbon Oxidation at Oxic–Anoxic Interfaces

Environmental Science & Technology, Journal Year: 2018, Volume and Issue: 52(21), P. 12349 - 12357

Published: Sept. 27, 2018

The formation of reactive manganese (Mn) species is emerging as a key regulator carbon oxidation rates, and thus CO2 emissions, in soils sediments. Many subsurface environments are characterized by steep oxygen gradients, forming oxic-anoxic interfaces that enable rapid redox cycling Mn. Here, we examined the impact Mn(II)aq along on using laboratory-based diffusion reactors. A combination cyclic voltammetry, X-ray absorption spectroscopy, microprobe imaging revealed tight coupling between at interface. Specifically, zones across transition also exhibited greatest lignin potential, solubilization, oxidation. Microprobe further generation Mn(III)-dominated precipitates coincided with Combined, our findings demonstrate biotic oxidation, specifically Mn(III) species, contributes to Our results suggest should regard not merely function molecular composition, which insufficiently predicts but relation microenvironments favoring critically important oxidants such Mn(III).

Language: Английский

---

Manganese availability is negatively associated with carbon storage in northern coniferous forest humus layers

Scientific Reports, Journal Year: 2017, Volume and Issue: 7(1)

Published: Nov. 8, 2017

Carbon sequestration below ground depends on organic matter input and decomposition, but regulatory bottlenecks remain unclear. The relative importance of plant production, climate edaphic factors has to be elucidated better predict carbon storage in forests. In Swedish forest soil inventory data from across the entire boreal latitudinal range (n = 2378), concentration exchangeable manganese was singled out as strongest predictor (R2 0.26) extensive horizon (mor layer), which accounts for one third total carbon. comparison, established ecosystem models applied same have failed stocks < 0.05), our study availability overshadowed both litter production climatic factors. We also identified potassium an additional strong predictor, however strongly correlated with manganese. negative correlation between highlights Mn-peroxidases oxidative decomposition recalcitrant matter. results support idea that fungus-driven could a critical factor regulating humus accumulation forests, are specifically produced by basidiomycetes.

Language: Английский

---

Manganese limitation as a mechanism for reduced decomposition in soils under atmospheric nitrogen deposition

Soil Biology and Biochemistry, Journal Year: 2018, Volume and Issue: 127, P. 252 - 263

Published: Sept. 27, 2018

Language: Английский

---

Ecosystem type and resource quality are more important than global change drivers in regulating early stages of litter decomposition

Soil Biology and Biochemistry, Journal Year: 2018, Volume and Issue: 129, P. 144 - 152

Published: Nov. 12, 2018

Language: Английский

---