Publication Date:
2013-09-14
Description:
Abiotic release of nitrous acid (HONO) in equilibrium with soil nitrite (NO2(-)) was suggested as an important contributor to the missing source of atmospheric HONO and hydroxyl radicals (OH). The role of total soil-derived HONO in the biogeochemical and atmospheric nitrogen cycles, however, has remained unknown. In laboratory experiments, we found that for nonacidic soils from arid and arable areas, reactive nitrogen emitted as HONO is comparable with emissions of nitric oxide (NO). We show that ammonia-oxidizing bacteria can directly release HONO in quantities larger than expected from the acid-base and Henry's law equilibria of the aqueous phase in soil. This component of the nitrogen cycle constitutes an additional loss term for fixed nitrogen in soils and a source for reactive nitrogen in the atmosphere.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oswald, R -- Behrendt, T -- Ermel, M -- Wu, D -- Su, H -- Cheng, Y -- Breuninger, C -- Moravek, A -- Mougin, E -- Delon, C -- Loubet, B -- Pommerening-Roser, A -- Sorgel, M -- Poschl, U -- Hoffmann, T -- Andreae, M O -- Meixner, F X -- Trebs, I -- New York, N.Y. -- Science. 2013 Sep 13;341(6151):1233-5. doi: 10.1126/science.1242266.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biogeochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany. robert.oswald@mpic.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24031015" target="_blank"〉PubMed〈/a〉
Keywords:
Ammonia/metabolism
;
Atmosphere/chemistry
;
Nitrogen/*metabolism
;
*Nitrogen Fixation
;
Nitrosomonas europaea/*metabolism
;
Nitrous Acid/*metabolism
;
Oxidation-Reduction
;
Reactive Nitrogen Species/*metabolism
;
*Soil Microbiology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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