A5021009913- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Mass Spectrometry Techniques and Applications
- Atmospheric and Environmental Gas Dynamics
- Water Quality Monitoring and Analysis
- Toxic Organic Pollutants Impact
- Spectroscopy and Laser Applications
- Isotope Analysis in Ecology
- Surface Roughness and Optical Measurements
- Advanced Chemical Sensor Technologies
- Pigment Synthesis and Properties
- Material Properties and Applications
- Vehicle emissions and performance
- Minerals Flotation and Separation Techniques
- Conservation Techniques and Studies
- Solar Radiation and Photovoltaics
- Indoor Air Quality and Microbial Exposure
- Groundwater and Isotope Geochemistry
- Industrial Gas Emission Control
- Gas Sensing Nanomaterials and Sensors
University of Patras
2022-2025
Foundation for Research and Technology Hellas
2022-2025
FORTH Institute of Chemical Engineering Sciences
2023-2024
Abstract. Extensive continuous particle number size distribution measurements took place during two summers (2020 and 2021) at 11 sites in Greece for the investigation of frequency spatial extent new formation (NPF). The study area is characterized by high solar intensity fast photochemistry has moderate to low fine particulate matter levels summer. average PM2.5 were relatively uniform across examined sites. NPF summer varied from close zero southwestern parts more than 60 % northern,...
Abstract Wildfires are a significant source of organic aerosol during summer, with major impacts on air quality and climate. However, studies in Europe suggest surprisingly low (less than 10%) contribution biomass burning to average summertime fine particulate matter levels. In this study we combine field measurements atmospheric chemical transport modeling, demonstrate that the wildfires particle levels summer is seriously underestimated. Our work suggests corresponding has been...
Monitoring indoor air quality in schools is essential, particularly as children are highly vulnerable to pollution. This study evaluates the performance of low-cost sensor-based monitoring system ENSENSIA, during a 3-week campaign an elementary school classroom Athens, Greece. The measured PM2.5, CO, NO, NO2, O3, and CO2. High-end instrumentation provided reference concentrations. aim was assess sensors’ estimating average day-to-day exposure, capturing temporal variations degree agreement...
PM2.5 measurements using a network of lost-cost sensors were conducted during 2017–2019 in the greater area Patras, Greece. The average concentration all sites study period was 9.4 μg m−3, varying from 6.2 m−3 background areas to 12.8 at city center. site with peak levels not located an high traffic density but rather square pedestrian-only zones and restaurant density. highest concentrations observed colder (November–March) due emissions residential wood burning for heating purposes. used...
Abstract The Italian Po Valley is one of the most polluted regions in Europe. During winter, meteorological conditions favor long and dense fogs, which strongly affect visibility human health. In spring, frequency nighttime fogs reduces while daytime new particle formation events become more common. This transition likely caused by a reduction PM 2.5 , leading to decrease relevant condensation sink. physics chemistry fog aerosol have been studied at San Pietro Capofiume site since 1980s, but...
A new gas inlet port combined with a novel ionization scheme have been developed and coupled to high-resolution time-of-flight mass spectrometer (TOF MS) for the detection measurement of atmospheric volatile (VOCs) intermediate volatility organic compounds (IVOCs). Ions are produced predominantly by charge transfer reactions in low-temperature plasma source minimal fragmentation. Enhanced sensitivity is accomplished incorporating an increased-size capillary transverse arrangement maximize...
Homogeneous nucleation is an important source of new particles in the atmosphere worldwide. The resulting newly formed stable nuclei can grow to larger sizes and affect air quality climate. Unexpected significant spatial variability frequency has been observed Greece only previous relative study: very high Thessaloniki, intermediate Eastern Crete low Patras (Patoulias et al., 2018). Our hypothesis that may be excellent natural laboratory investigate factors affecting understand reasons...
Organic aerosol (OA) constitutes a major fraction of the sub-micrometer atmospheric particulate matter and is either emitted directly into atmosphere as primary organic (POA) or formed by partitioning onto pre-existent particles low vapor pressure products oxidation volatile, intermediate volatility, semivolatile compounds (VOCs, IVOCs, SVOCs respectively) secondary (SOA). The these results in thousands mostly unspecified oxygenated making our understanding SOA formation mechanisms...
  Aerosol particles affect the climate system by directly absorbing and scattering solar radiation or acting as cloud condensation nuclei (CCN) modulating radiative properties. Cloud particle activation is at heart of these aerosol-cloud interactions, but it important to quantify degree which aerosol (size distribution composition) dynamical aspects (vertical velocity) contribute droplet number concentration, they determine in end sensitivity variations. In this study, we use a...
Abstract. A dual chamber system was deployed in two different environments to study the potential of ambient air, that directly injected into chambers, form secondary organic and inorganic aerosol. total 16 experiments took place during March 2022 a polluted environment Po Valley, Italy which is dominated by anthropogenic emissions. Another 15 were conducted Pertouli forest, Greece biogenic In both campaigns, air containing highly oxidized (average O:C 0.7–0.8) aerosol starting point its...
Abstract. A newly developed charge transfer orthogonal Time-of-Flight Mass Spectrometer (oToF-MS), was deployed for the first time in field order to evaluate its ability perform online real-time measurements of volatile organic compounds (VOCs) a prolonged period. The study focused on urban air sampling and targeted specific range VOCs, namely: acetone, isoprene, benzene, toluene, xylene. measurement campaign took place from May August 2023 at suburban area Athens Greece. measured VOC level...
Volatile (VOCs) and intermediate volatility organic compounds (IVOCs) can undergo atmospheric oxidation, forming secondary aerosol (SOA) as their low oxidation products condense in the particulate phase. Recent research has suggested that IVOCs, which have been neglected for decades, may an important role SOA formation (Tkacik et al., 2012). Most of work until now, focused on from VOCs with 5 to 10 carbon atoms.The main goal this is study production reactions individual anthropogenic large...
Soiling of cultural heritage due to air pollution is a major challenge for the conservation community and it has motivated scientists understand mechanisms that govern processes degradation effectiveness potential preventative measures. The relationship between perceptible optical paintings cumulative exposure particulate matter so far not been well established. This study develops method quantification changes resulting from mass deposition on surface realistic simulating prolonged in...
Abstract. Extensive continuous particle number size distribution measurements took place during two summers (2020 and 2021) in 11 sites Greece for the investigation of frequency spatial extent new formation (NPF). The study area is characterized by high solar intensity, fast photochemistry, has moderate to low fine particulate matter levels summer. average PM2.5 were relatively uniform across examined sites. NPF summer varied from close zero southwestern parts more than 60 % northern,...