Hi, everyone, now I have a question about the efficiency of denitrification and nitrification in N2O production. do you know is there paper or data that talk about this question?
how much N2O produced during the reduction of 1 mol of nitrate, and how about the oxidation of 1 mol of ammonium?
Hi Dai,
The amount of N2O yielded in nitrification and denitrification is highly dependent on other environmental factors, especially dissolved oxygen saturation, therefore there will never be a constant amount of N2O produced, indeed if conditions are highly favourable for denitrification there will be no N2O as it is an intermediate and will be consumed to produce N2. The following paper is a good place to start:
I recommend the following paper if you are dealing with aquatic N2O production.
Quick, A. M., W. J. Reeder, T. B. Farrell, D. Tonina, K. P. Feris, and S. G. Benner. 2019. Nitrous oxide from streams and rivers: A review of primary biogeochemical pathways and environmental variables. Earth-Science Reviews 191: 224-262.
Hi Dai, as mentioned by Michael, it's a function of O2 levels, check out :
Goreau, T.J., Kaplan, W.A., Wofsy, S.C., McElroy, M.B., Valois, F.W., Watson, S.W., 1980. Production of NO2- and N2O by nitrifying bacteria at reduced concentrations of oxygen. Appl. Environ. Microbiol. 40, 526–532.
Denitrification occurs in anoxic condition and if during this process, supply of DO is there along with less microbial density , then only this process hinders and N20 might produce as the intermediate product due to withdrawal of electrons from molecular oxygen in comparison to N20 in which combined form of oxygen is present.
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