HONO Emissions from Soil Bacteria as a Major Source of Atmospheric Reactive Nitrogen

From Soil to Sky Trace gases emitted either through the activity of microbial communities or from abiotic reactions in the soil influence atmospheric chemistry. In laboratory column experiments using several soil types, Oswald et al. (p. 1233 ) showed that soils from arid regions and farmlands can produce substantial quantities of nitric oxide (NO) and nitrous acid (HONO). Ammonia-oxidizing bacteria are the primary source of HONO at comparable levels to NO, thus serving as an important source of reactive nitrogen to the atmosphere.

Volatile Organic Compounds (VOCs) emitted from soils amended with organic wastes

Microbial volatiles organics compounds (mvocs) emitted from soils amended with organic wastes

EABIOmEAGROSUP; Volatile organic compounds (VOCs) have a central role in environmental pollution. They influence the chemistry and the composition of the atmosphere. In particular, biogenic volatile organic compounds (bVOCs) contribute 90% to global VOCs emissions1. Microorganisms contribute to bVOCs emissions and their emissions could be affected by different type of organic waste in soil2. The aim of this study is focused on determining the effect of organic wastes on VOC emitted by microorganisms in soils. The technique used for mVOC detection is the Proton Transfer Reaction-Time of Flight-Mass Spectrometry*(PTR-TOF-MS). PTR-TOF-MS technique provides on-line detection of VOC with two mai…

Emissions de composés organiques volatils par des sols amendés par des PRO: évolution saisonnière et lien avec la diversité microbienne

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Multilayer modelling of ozone fluxes on winter wheat reveals large deposition on wet senescing leaves

Understanding how ozone is deposited on vegetation canopies is needed to perform tropospheric greenhouse gas budgets and evaluate the associated damage on vegetation. In this study, we propose a new multilayer scheme of ozone deposition on vegetation canopies that predicts stomatal, cuticular and soil deposition pathways separately. This mechanistic ozone deposition scheme is based on the multi-layer, multi-leaf mass and energy transfer model MuSICA. This model was chosen because it explicitly simulates the processes of rain interception, through fall and evaporation at different depths within the vegetation canopy, so that ozone deposition on wet leaf cuticles can be explicitly modelled wi…

Microbial Volatile Organic Compounds (mVOCs) emission by soil

EABIOMEAGROSUP; Volatile organic compounds (VOCs) have a central role in environmental pollution. In particular, biogenic volatile organic compounds (bVOCs) contribute 90% to global VOCs emissions. One of the most important sources of bVOCs are microorganisms. The aim of this bibliography research is to start studying the relationship between microorganisms and VOCs production. To achieve this purpose we begin answering two main questions: firstly, why microorganisms produce VOCs and what can affect their production; secondly, how the PTR-TOF-MS technique can be used for microbial VOC soil analysis. Literature shows that VOC production depends on the sugar degradation pathway, with emission…