A5024713201- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Vehicle emissions and performance
- Pesticide Residue Analysis and Safety
- Toxic Organic Pollutants Impact
- Odor and Emission Control Technologies
- Spectroscopy and Laser Applications
- Indoor Air Quality and Microbial Exposure
- COVID-19 impact on air quality
- Insect and Pesticide Research
- Atmospheric and Environmental Gas Dynamics
- Water Quality Monitoring and Analysis
- Radiation Therapy and Dosimetry
- Atmospheric aerosols and clouds
- Advanced Radiotherapy Techniques
- Pesticide Exposure and Toxicity
- Pesticide and Herbicide Environmental Studies
- Plant responses to elevated CO2
- Advanced Chemical Sensor Technologies
- Luminescence Properties of Advanced Materials
- Geophysics and Gravity Measurements
- Forest Biomass Utilization and Management
- Impact of Light on Environment and Health
Mediterranean Center for Environmental Studies
2008-2024
Fundación General
2006-2024
NOAA Air Resources Laboratory
2013
Abstract. The α-dicarbonyl compounds glyoxal (CHOCHO) and methyl (CH3C(O)CHO) are produced in the atmosphere by oxidation of hydrocarbons emitted directly from pyrogenic sources. Measurements ambient concentrations inform about rate hydrocarbon oxidation, oxidative capacity, secondary organic aerosol (SOA) formation. We present results a comprehensive instrument comparison effort at two simulation chamber facilities US Europe that included nine instruments, seven different measurement...
The gas-phase atmospheric degradation of chlorpyrifos-methyl (a widely used organophosphate insecticide in Southern European regions) has been investigated at the large outdoor Photoreactor (EUPHORE) Valencia, Spain. Photolysis under sunlight conditions and reaction with ozone were shown to be unimportant. rate constant for OH radicals was measured using a conventional relative method cyclohexane n-octane employed as reference compounds k = (4.1 ± 0.4) × 10−11 cm3 molecule−1 s−1 300 5 K...
Abstract. The degradation of 2-aminoethanol (MEA) by the hydroxyl radical (OH) was studied in European Photoreactor (EUPHORE), a large outdoor environmental chamber. High-Temperature Proton-Transfer-Reaction Mass Spectrometry (HT-PTR-MS) and Fast Fourier Transform Infrared (FT-IR) were used to follow concentrations reactants gas phase. Aerosol mass tracked with (AMS). chamber aerosol model MAFOR applied quantify losses MEA particle rate constant k(OH + MEA) determined relative...
Secondary organic aerosol (SOA) is well-known to have adverse effects on air quality and human health. However, the dynamic mechanisms occurring during SOA formation evolution are poorly understood. The time-resolved composition formed photo-oxidation of three aromatic compounds, methyl chavicol, toluene 4-methyl catechol, were investigated at European Photoreactor. was collected using a particle into liquid sampler analyzed offline state-of-the-art mass spectrometry produce temporal...
Nitrogen dioxide (NO2) and volatile organic compounds (VOCs) are of concern in urban environments as primary pollutants main precursors tropospheric O3, which has adverse effects on both human health vegetation. Furthermore, a secondary pollutant, its complex nature due to non-linear chemistry makes it difficult reduce with the reduction precursors.This study is carried out spatially characterise air pollution, using NO2 VOCs, evaluate recent temporal trends these compounds, closely related...
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous compounds in the atmosphere. These cover a wide range of structures and chemical properties. Among them, nitro derivatives PAHs (nitro-PAHs) particular interest. Nitro-PAHs formed both by direct emissions, such as from diesel combustion engines, secondary reactions, nitration parent PAHs. Furthermore, nitro-PAHs recognized toxic pollutants with adverse effects on human health [1], requiring detailed studies their atmospheric behavior,...
Abstract. Green leaf volatiles (GLVs) are an important group of chemicals released by vegetation which have emission fluxes that can be significantly increased when plants damaged or stressed. A series simulation chamber experiments has been conducted at the European Photoreactor in Valencia, Spain, to investigate secondary organic aerosol (SOA) formation from atmospheric oxidation major GLVs cis-3-hexenylacetate and cis-3-hexen-1-ol. Liquid chromatography-ion trap mass spectrometry was used...
Biomass burning (BB) represents a global concern due to its impact on air pollution, health and climate change, resulting in 2.3 million premature deaths yearly. BB the residential sector is one of main sources primary Particulate Matter emissions. emits significant amount black brown carbon, Polycyclic Aromatic Hydrocarbons, contributes secondary formation ozone by photochemical reaction volatile organic compounds nitrogen oxides. On other side, green renewable alternative source fossil...
We conducted a series of tests using the FIGAERO-HR-ToF-CIMS to assess its sensitivity diverse array multifunctional organic molecules. These experiments were under dark conditions in 200 m³ outdoor chambers at EUPHORE, ensuring nearly stable concentrations studied compounds within controlled environment. The goal these was characterize state-of-the-art instruments I-HR-ToF-CIMS coupled with FIGAERO inlet, which allows both gas and particle phase analysis. It aimed...
Particulate matter from wood combustion has a significant impact on climate and human health. Black carbon (BC) brown (BrC) are strong light absorbers that reduce the transparency of atmosphere in long short wavelength range. As aerosol ages, some molecular chromophores break down particles become less absorbent (photobleaching). On other hand, photochemical ageing can modify organic molecules, which light-absorbing even though they were colorless after emission. In addition, secondary...
The determination of multifunctional oxygenated compounds in secondary organic aerosols (SOA) usually requires a derivatisation protocol prior to gas chromatography-mass spectrometry analysis (GC-MS). Our proposed protocol, combination O-(2,3,4,5,6-pentafluorobenzyl) hydroxylamine (PFBHA) plus diluted N-methyl-N-trimethyl-silyltrifluoroacetamide (MSTFA) without catalyst, has improved the carbonyls, polyhydroxyl-compounds, hydroxyl-carbonyls, hydroxyl-carboxylic acids and di-carboxylic acids....
Recent laboratory and modelling studies have shown that reactive uptake of low molecular weight α-dicarbonyls such as glyoxal (GLY) by aerosols is a potentially significant source secondary organic aerosol (SOA). However, previous disagree in the magnitude GLY, mechanism involved physicochemical factors affecting particle formation. In this study, chemistry GLY with ammonium sulfate (AS) both bulk solutions particles investigated. For first time, Aerosol Time Flight Mass Spectrometry...