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Chemodenitrification by Fe(II) and nitrite: Effects of temperature and dual N O isotope fractionation by Chen, Guojun (author);Zhao, Wenqi (author);Yang, Yang (author);Chen, Dandan (author);Wang, Ying (author);Li, Fangbai (author);Zhao, Zhuyu (author);Cao, Fang (author);Liu, Tongxu (author) is a Earth and Planetary Sciences article available to read on EtoBox.

What is Chemodenitrification by Fe(II) and nitrite: Effects of temperature and dual N O isotope fractionation about?

Chemodenitrification between Fe(II) and nitrite, an important nitrogen (N) cycling pathway, varies depending on the season, indicating the impact of ambient temperatures. However, the underlying mechanism for this occurrence has not been explained at a molecular scale. As an effective approach for studying N cycling, dual N -O isotope fractionation was analyzed to reveal the reactions of temperature-dependent chemodenitrification. The kinetics of chemodenitrification under different temperatures showed that nitrite reduction rates and N 2 O production increased with temperature (5-35 • C). Lepidocrocite was identified as the secondary mineral of Fe(II) oxidation at 5, 15, and 25 • C, and goethite was observed at 35 • C. Further, the value of the O isotope enrichment factor ( 18 ε) decreased with increasing temperature while values of N isotope fractionation enrichment factor ( 15 ε) were less sensitive to temperature. The isotope fractionation ratios of O to N ( 18 ε: 15 ε) were 1.00 ± 0.25, 0.75 ± 0.05, 0.54 ± 0.04, and 0.46 ± 0.06 at 5, 15, 25, and 35 • C, respectively, indicating that the temperature effect should be considered when dual N -O isotope data are applied to distingu

Who reads Chemodenitrification by Fe(II) and nitrite: Effects of temperature and dual N O isotope fractionation?

It is typically read by researchers, students, and practitioners in Earth and Planetary Sciences.

Author
Chen, Guojun (author);Zhao, Wenqi (author);Yang, Yang (author);Chen, Dandan (author);Wang, Ying (author);Li, Fangbai (author);Zhao, Zhuyu (author);Cao, Fang (author);Liu, Tongxu (author)
Publisher
Elsevier BV
Published
2021
Language
EN
Field
Earth and Planetary Sciences (Physical Sciences)

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