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Thomas Maggos is Senior Researcher and Head of the Atmospheric Chemistry and Innovative Technologies Lab (AirTec Lab) of the National Centre for Scientific Research “Demokritos”. Following his basic studies in Chemistry at the University of Crete, he joined the University of Athens where he received M.Sc in Environmental Chemistry & Technology. He received his PhD in the Mechanical Engineering Department of the University of West Macedonia. In 1998 he joined the institute of Nuclear Technology – Radiation Protection at the National Center for Scientific Research ‘Demokritos’, working on innovative technological systems for air quality research in urban, indoor and occupational environment and on photocatalytic processes and applications for air pollutants abatement. He is Coordinator and Principal Investigator (PI) of various EU projects (LIFE+, HORIZON 2020, FP7). He is in charge of the accreditation of AirTech Lab under the terms of ELOT EN ISO 17025:2017 standard for specific gas pollutant measurements. He is deputy coordinator of the Indoor TG of ERNCIP (European Reference Network for Critical Infrastructure Protection), deputy member of the management board of COST17136 action and member of CEN/TC264/WG15 & CEN/TC386/WG2 working groups. He has more than 80 publications in international peer-reviewed journals and more than 120 in international conferences.
Air quality monitoring is a long-term assessment of pollutant levels that helps to assess the extent of pollution and provide information about air quality trends
Thomas Maggos. Advances in Air Quality Monitoring and Assessment. Applied Sciences 2021, 11, 5817 .
AMA StyleThomas Maggos. Advances in Air Quality Monitoring and Assessment. Applied Sciences. 2021; 11 (13):5817.
Chicago/Turabian StyleThomas Maggos. 2021. "Advances in Air Quality Monitoring and Assessment." Applied Sciences 11, no. 13: 5817.
House settled dust (HSD) contains various hazardous materials, including polycyclic aromatic hydrocarbons (PAHs) and metals. Exposure to toxicants contained in HSD is of paramount concern especially in the case of young children, due to their particular behavioral characteristics. In this context, extracts of sieved vacuum cleaner dust from 20 residences with young children were examined for the presence of PAHs and trace metals, in Athens, Greece. The results indicated that PAHs and metals were ubiquitous in the studied residences. The calculated enrichment factors (EF) of trace metals indicated that Cu, Se, Zn, Hg, Cd, and Pb were mainly of anthropogenic. According to the PCA analysis, the main sources of household dust were: smoking inside the houses, combustion processes, resuspension of soil dust, and vehicle traffic. In general, the cancer risk due to PAHs exposure was found lower than the threshold value. The ingestion of house dust was the most important route of exposure to metals. The dose of almost all elements for the children was found 1–2 orders of magnitude lower than the corresponding reference values. Both the carcinogenic and noncarcinogenic risks of exposure were within the safety limits.
A. Stamatelopoulou; M. Dasopoulou; K. Bairachtari; S. Karavoltsos; K. Sakellari; T. Maggos. Contamination and Potential Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) and Heavy Metals in House Settled Dust Collected from Residences of Young Children. Applied Sciences 2021, 11, 1479 .
AMA StyleA. Stamatelopoulou, M. Dasopoulou, K. Bairachtari, S. Karavoltsos, K. Sakellari, T. Maggos. Contamination and Potential Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) and Heavy Metals in House Settled Dust Collected from Residences of Young Children. Applied Sciences. 2021; 11 (4):1479.
Chicago/Turabian StyleA. Stamatelopoulou; M. Dasopoulou; K. Bairachtari; S. Karavoltsos; K. Sakellari; T. Maggos. 2021. "Contamination and Potential Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) and Heavy Metals in House Settled Dust Collected from Residences of Young Children." Applied Sciences 11, no. 4: 1479.
Research on air quality issues in recently refurbished educational buildings is relatively limited. However, it is an important topic as students are often exposed to high concentrations of air pollutants, especially in urban environments. This study presents the results of a 25-day experimental campaign that took place in a primary school located in a densely built-up area, which retains a green roof system (GRS). All measurements refer to mass concentrations and chemical analysis of PM10 (particulate matter less than 10 micrometers), and they were implemented simultaneously on the GRS and within the classroom (C3) below during different periods of the year. The results demonstrated relatively low levels of PM10 in both experimental points, with the highest mean value of 72.02 μg m−3 observed outdoors during the cold period. Elemental carbon (EC) was also found be higher in the ambient environment (with a mean value of 2.78 μg m−3), while organic carbon (OC) was relatively balanced between the two monitoring sites. Moreover, sulfate was found to be the most abundant water soluble anion (2.57 μg m−3), mainly originating from ambient primary SO2 and penetrating into the classroom from windows. Additionally, the crustal origin of particles was shown in trace metals, where Al and Fe prevailed (9.55% and 8.68%, respectively, of the total PM10). Nevertheless, infiltration of outdoor particles within the classroom was found to affect indoor sources of metals. Finally, source apportionment using a positive matrix factorization (PMF) receptor model demonstrated six main factors of emissions, the most important of which were vehicles and biomass burning (30.30% contribution), along with resuspension of PM10 within the classroom from human activities (29.89% contribution). Seasonal variations seem to play a key role in the results.
Nikolaos Barmparesos; Dikaia Saraga; Sotirios Karavoltsos; Thomas Maggos; Vasiliki D. Assimakopoulos; Aikaterini Sakellari; Kyriaki Bairachtari; Margarita Niki Assimakopoulos. Chemical Composition and Source Apportionment of PM10 in a Green-Roof Primary School Building. Applied Sciences 2020, 10, 8464 .
AMA StyleNikolaos Barmparesos, Dikaia Saraga, Sotirios Karavoltsos, Thomas Maggos, Vasiliki D. Assimakopoulos, Aikaterini Sakellari, Kyriaki Bairachtari, Margarita Niki Assimakopoulos. Chemical Composition and Source Apportionment of PM10 in a Green-Roof Primary School Building. Applied Sciences. 2020; 10 (23):8464.
Chicago/Turabian StyleNikolaos Barmparesos; Dikaia Saraga; Sotirios Karavoltsos; Thomas Maggos; Vasiliki D. Assimakopoulos; Aikaterini Sakellari; Kyriaki Bairachtari; Margarita Niki Assimakopoulos. 2020. "Chemical Composition and Source Apportionment of PM10 in a Green-Roof Primary School Building." Applied Sciences 10, no. 23: 8464.
Despite the various reduction policies that have been implemented across Europe in the past few years, Particulate Matter (PM) exceedances continue to be recorded. Therefore, with the principal aim to clarify the complex association between emissions and fine particles levels, this work evaluates the impact of the anthropogenic contribution to the fine PM chemical profile. The fieldwork was conducted during March in 2008 and 2013 and covers the periods before and during the economic recession. The experimental data were analyzed in parallel with the emissions from the Flexible Emission Inventory for Greece and the Greater Athens Area (FEI-GREGAA). The differentiation of the mass closure results’ and the aerosols’ character is also discussed in combination with the calculated PM2.5-Air Quality Indexes. The peak in the PM load and the Particulate Organic Matter (POM) component was recorded in 2013, corresponding to the enhancement of the anthropogenic input. Although the monitoring location is traffic-impacted, the sector of heating, from both wood burning and fossil fuel, proved to be the driving force for the configuration of the obtained PM picture. Especially in 2013, its contribution was two times that of traffic. Finally, the low wind speed values led to the deterioration of the air quality, especially for the sensitive groups.
Styliani Pateraki; Kyriaki-Maria Fameli; Vasiliki Assimakopoulos; Kyriaki Bairachtari; Alexandros Zagkos; Theodora Stavraka; Aikaterini Bougiatioti; Thomas Maggos; Nikolaos Mihalopoulos. Differentiation of the Athens Fine PM Profile during Economic Recession (March of 2008 versus March of 2013): Impact of Changes in Anthropogenic Emissions and the Associated Health Effect. Atmosphere 2020, 11, 1121 .
AMA StyleStyliani Pateraki, Kyriaki-Maria Fameli, Vasiliki Assimakopoulos, Kyriaki Bairachtari, Alexandros Zagkos, Theodora Stavraka, Aikaterini Bougiatioti, Thomas Maggos, Nikolaos Mihalopoulos. Differentiation of the Athens Fine PM Profile during Economic Recession (March of 2008 versus March of 2013): Impact of Changes in Anthropogenic Emissions and the Associated Health Effect. Atmosphere. 2020; 11 (10):1121.
Chicago/Turabian StyleStyliani Pateraki; Kyriaki-Maria Fameli; Vasiliki Assimakopoulos; Kyriaki Bairachtari; Alexandros Zagkos; Theodora Stavraka; Aikaterini Bougiatioti; Thomas Maggos; Nikolaos Mihalopoulos. 2020. "Differentiation of the Athens Fine PM Profile during Economic Recession (March of 2008 versus March of 2013): Impact of Changes in Anthropogenic Emissions and the Associated Health Effect." Atmosphere 11, no. 10: 1121.
Potential chemical and biological (CB) attacks in indoor spaces pose specific challenges for prevention and preparedness. This paper summarises the conclusions obtained from the work conducted in the framework of the ERNCIP1. A thorough review of the existing and emerging technologies for CB detection, coupled with simulations of CB airborne dispersion in (critical) infrastructures to investigate the implementation of such sensors is presented. The conclusions include: (a) limitations of current sensor technology, (b) the effect of spatial variability of contamination within a building envelop on the effectiveness of such technology (c) the importance of early identification of both CB compounds for post-event mitigation.
Spyros Karakitsios; Ruud Busker; Torbjorn Tjärnhage; Patrick Armand; Marius Dybwad; Merete Folmer Nielsen; Jan Burman; James Burke; Josef Brinek; John Bartzis; Thomas Maggos; Marianthi Theocharidou; Peter Gattinesi; Georgios Giannopoulos; Dimosthenis Sarigiannis. Challenges on detection, identification and monitoring of indoor airborne chemical-biological agents. Safety Science 2020, 129, 104789 .
AMA StyleSpyros Karakitsios, Ruud Busker, Torbjorn Tjärnhage, Patrick Armand, Marius Dybwad, Merete Folmer Nielsen, Jan Burman, James Burke, Josef Brinek, John Bartzis, Thomas Maggos, Marianthi Theocharidou, Peter Gattinesi, Georgios Giannopoulos, Dimosthenis Sarigiannis. Challenges on detection, identification and monitoring of indoor airborne chemical-biological agents. Safety Science. 2020; 129 ():104789.
Chicago/Turabian StyleSpyros Karakitsios; Ruud Busker; Torbjorn Tjärnhage; Patrick Armand; Marius Dybwad; Merete Folmer Nielsen; Jan Burman; James Burke; Josef Brinek; John Bartzis; Thomas Maggos; Marianthi Theocharidou; Peter Gattinesi; Georgios Giannopoulos; Dimosthenis Sarigiannis. 2020. "Challenges on detection, identification and monitoring of indoor airborne chemical-biological agents." Safety Science 129, no. : 104789.
Contaminants of biological origin, such as fungi and bacteria, are ubiquitous inside the residences and especially in bedroom microenvironments. Epidemiological studies have shown that fungal exposure is associated with respiratory and allergic symptoms. Infants and young children comprise a susceptible population to study, since they spend most of their day inside their rooms. A study was undertaken to investigate environmental factors (temperature and relative humidity), indoor pollutants (PM2.5, CO2), building characteristics and occupant activities in relation to the spectrum and levels of settled fungi in 25 Greek young's children bedrooms, and to evaluate the fungal qualitative and quantitative composition of houses with and without asthmatic/allergic children. In this context, on-site house inspections to study the Indoor Air Quality (IAQ) in bedrooms of young children below three years of age were conducted in Athens, Greece. Sampling campaigns were conducted over one-week period using Electrostatic Dust Collectors (EDCs) to quantify fungal and bacterial exposure in settled dust and real-time monitoring techniques for environmental parameters (T, RH, CO2, PM2.5). The present investigation revealed that the predominant dustborne genus was Cladosporium followed by Alternaria and Aspergillus, and that living in a suburban area, the presence of an attached garage and the presence of a carpet in the bedroom were significant predictors of fungal concentrations. Furthermore, although the difference was not statistically significant, higher fungal concentrations were recorded in the houses with asthmatic or atopic children.
A. Stamatelopoulou; I. Pyrri; D.N. Asimakopoulos; Thomas Maggos. Indoor air quality and dustborne biocontaminants in bedrooms of toddlers in Athens, Greece. Building and Environment 2020, 173, 106756 .
AMA StyleA. Stamatelopoulou, I. Pyrri, D.N. Asimakopoulos, Thomas Maggos. Indoor air quality and dustborne biocontaminants in bedrooms of toddlers in Athens, Greece. Building and Environment. 2020; 173 ():106756.
Chicago/Turabian StyleA. Stamatelopoulou; I. Pyrri; D.N. Asimakopoulos; Thomas Maggos. 2020. "Indoor air quality and dustborne biocontaminants in bedrooms of toddlers in Athens, Greece." Building and Environment 173, no. : 106756.
Indoor Air quality (IAQ) in private or public environments is progressively recognized as a critical issue for human health. For that purpose the poor IAQ needs to be mitigated and immediate drastic measures must be taken. In environmental science and especially in advanced oxidation processes and technologies (AOPs-AOTs), photocatalysis has gained considerable interest among scientists as a tool for IAQ improvement. In the current study an innovative paint material was developed which exhibits intense photocatalytic activity under direct and diffused visible light for the degradation of air pollutants, suitable for indoor use. A laboratory and a real scale study were performed using the above innovative photo-paint. The lab test was performed in a special design photo-reactor while the real scale in a military’s medical building. Nitrogen Oxide (NO) and Toluene concentration was monitored between “reference” rooms (without photo paint) and “green” rooms (with photo-paint) in order to estimate the photocatalytic efficiency of the photo-paint to degrade the above pollutants. Results of the study showed a decrease up to 60% and 16% for NO and toluene respectively under lab scale tests while an improvement of air quality up to 19% and 5% under real world conditions was achieved.
Thomas Maggos; Vassiliοs Binas; Vasileios Siaperas; Antypas Terzopoulos; Panagiotis Panagopoulos; George Kiriakidis. A Promising Technological Approach to Improve Indoor Air Quality. Applied Sciences 2019, 9, 4837 .
AMA StyleThomas Maggos, Vassiliοs Binas, Vasileios Siaperas, Antypas Terzopoulos, Panagiotis Panagopoulos, George Kiriakidis. A Promising Technological Approach to Improve Indoor Air Quality. Applied Sciences. 2019; 9 (22):4837.
Chicago/Turabian StyleThomas Maggos; Vassiliοs Binas; Vasileios Siaperas; Antypas Terzopoulos; Panagiotis Panagopoulos; George Kiriakidis. 2019. "A Promising Technological Approach to Improve Indoor Air Quality." Applied Sciences 9, no. 22: 4837.
The exposome includes urban greenspace, which may affect health via a complex set of pathways, including reducing exposure to particulate matter (PM) and noise. We assessed these pathways using indoor exposure monitoring data from the HEALS study in four European urban areas (Edinburgh, UK; Utrecht, Netherlands; Athens and Thessaloniki, Greece). We quantified three metrics of residential greenspace at 50 m and 100 m buffers: Normalised Difference Vegetation Index (NDVI), annual tree cover density, and surrounding green land use. NDVI values were generated for both summer and the season during which the monitoring took place. Indoor PM2.5 and noise levels were measured by Dylos and Netatmo sensors, respectively, and subjective noise annoyance was collected by questionnaire on an 11-point scale. We used random-effects generalised least squares regression models to assess associations between greenspace and indoor PM2.5 and noise, and an ordinal logistic regression to model the relationship between greenspace and road noise annoyance. We identified a significant inverse relationship between summer NDVI and indoor PM2.5 (−1.27 μg/m3 per 0.1 unit increase [95% CI -2.38 to −0.15]) using a 100 m residential buffer. Reduced (i.e., <1.0) odds ratios (OR) of road noise annoyance were associated with increasing summer (OR = 0.55 [0.31 to 0.98]) and season-specific (OR = 0.55 [0.32 to 0.94]) NDVI levels, and tree cover density (OR = 0.54 [0.31 to 0.93] per 10 percentage point increase), also at a 100 m buffer. In contrast to these findings, we did not identify any significant associations between greenspace and indoor noise in fully adjusted models. We identified reduced indoor levels of PM2.5 and noise annoyance, but not overall noise, with increasing outdoor levels of certain greenspace indicators. To corroborate our findings, future research should examine the effect of enhanced temporal resolution of greenspace metrics during different seasons, characterise the configuration and composition of green areas, and explore mechanisms through mediation modelling.
William Mueller; Susanne Steinle; Juha Pärkkä; Eija Parmes; Hilkka Liedes; Eelco Kuijpers; Anjoeka Pronk; Dimosthenis Sarigiannis; Spyros Karakitsios; Dimitriοs Chapizanis; Thomas Maggos; Asimina Stamatelopoulou; Paul Wilkinson; James Milner; Sotiris Vardoulakis; Miranda Loh. Urban greenspace and the indoor environment: Pathways to health via indoor particulate matter, noise, and road noise annoyance. Environmental Research 2019, 180, 108850 .
AMA StyleWilliam Mueller, Susanne Steinle, Juha Pärkkä, Eija Parmes, Hilkka Liedes, Eelco Kuijpers, Anjoeka Pronk, Dimosthenis Sarigiannis, Spyros Karakitsios, Dimitriοs Chapizanis, Thomas Maggos, Asimina Stamatelopoulou, Paul Wilkinson, James Milner, Sotiris Vardoulakis, Miranda Loh. Urban greenspace and the indoor environment: Pathways to health via indoor particulate matter, noise, and road noise annoyance. Environmental Research. 2019; 180 ():108850.
Chicago/Turabian StyleWilliam Mueller; Susanne Steinle; Juha Pärkkä; Eija Parmes; Hilkka Liedes; Eelco Kuijpers; Anjoeka Pronk; Dimosthenis Sarigiannis; Spyros Karakitsios; Dimitriοs Chapizanis; Thomas Maggos; Asimina Stamatelopoulou; Paul Wilkinson; James Milner; Sotiris Vardoulakis; Miranda Loh. 2019. "Urban greenspace and the indoor environment: Pathways to health via indoor particulate matter, noise, and road noise annoyance." Environmental Research 180, no. : 108850.
Fine particulate matter (PM) has significant impacts on public health. Among its various chemical components, Polycyclic Aromatic Hydrocarbons (PAHs) are of particular importance since they contribute to a large extent or even enhance its toxic potency. Despite the verified importance of the fine PM pollution for the Greater Athens Area (GAA), information on its composition with respect to the hydrocarbons is extremely scarce. This study aims to uncover the occurrence of the PM2.5 and PM1-bound PAHs across the GAA investigating the impact of the sources and meteorology on the configuration of their profile and potential health risk. The fieldwork took place at three different locations during two different mesoscale wind regimes. Using the Diagnostic PAHs’ Ratio method, the sources were identified while for the quantification of the emissions from the traffic and central heating sectors, the FEI-GREGAA emission inventory was taken into consideration. The potential health risk was estimated calculating the toxic/mutagenic equivalency factors. The peaks for both the PM mass and the PAHs were attributed to the intensity of the emissions. On the other hand, the carcinogenic/mutagenic risk was mainly influenced by the varying characteristics of traffic and especially for the background atmosphere, from the arriving air masses from longer scale distances.
Styliani Pateraki; Kyriaki-Maria Fameli; Vasiliki Assimakopoulos; Aikaterini Bougiatioti; Thomas Maggos; Nikolaos Mihalopoulos. Levels, Sources and Health Risk of PM2.5 and PM1-Bound PAHs across the Greater Athens Area: The Role of the Type of Environment and the Meteorology. Atmosphere 2019, 10, 622 .
AMA StyleStyliani Pateraki, Kyriaki-Maria Fameli, Vasiliki Assimakopoulos, Aikaterini Bougiatioti, Thomas Maggos, Nikolaos Mihalopoulos. Levels, Sources and Health Risk of PM2.5 and PM1-Bound PAHs across the Greater Athens Area: The Role of the Type of Environment and the Meteorology. Atmosphere. 2019; 10 (10):622.
Chicago/Turabian StyleStyliani Pateraki; Kyriaki-Maria Fameli; Vasiliki Assimakopoulos; Aikaterini Bougiatioti; Thomas Maggos; Nikolaos Mihalopoulos. 2019. "Levels, Sources and Health Risk of PM2.5 and PM1-Bound PAHs across the Greater Athens Area: The Role of the Type of Environment and the Meteorology." Atmosphere 10, no. 10: 622.
With the principal aim to assess the typical Mediterranean profile of the PM2.5 and PM1 pollution, three intensive monitoring campaigns took place simultaneously within different types of environment across an urban location of the basin. Focusing on the PM components with numerous anthropogenic sources and increased potential health risk, the samples were chemically analyzed for 20 p.m.-bound Polycyclic Aromatic Hydrocarbons (PAHs). Carbonaceous and ionic constituents were quantified as well. In order to uncover the spatiotemporal variation of the PM profile the key sources were identified, the seasonal effects and the role of the prevailing mesoscale atmospheric circulation were evaluated and most importantly the potential health risk was estimated. In general, the pollution status of the basin was the result of a complex interaction between the local and external input with Particulate Organic Matter (POM) and Secondary Inorganic Aerosols (SIA) being the main aerosols’ components. PM1 was a better indicator of the anthropogenic emissions while according to the results of factor analysis the co-existence of various combustion sources was determinant. Chemically, the maxima of the ΣPAHs, the differentiation of their structure in accordance with their molecular weight and the distribution of the individual compounds confirmed the significance of the emission sources. Similarly, the estimated carcinogenicity/mutagenicity was emission-dependent with the maximum contribution coming from B[a]P, IndP, B[ghi]Per, B[e]P and B[b]F. Seasonally, the highest potential health risk of the PAHs’ mixture was recorded during the cold season while meteorologically, it was mostly associated with the south flow.
St. Pateraki; D.N. Asimakopoulos; Thomas Maggos; V.D. Assimakopoulos; Aikaterini Bougiatioti; K. Bairachtari; Ch. Vasilakos; N. Mihalopoulos. Chemical characterization, sources and potential health risk of PM2.5 and PM1 pollution across the Greater Athens Area. Chemosphere 2019, 241, 125026 .
AMA StyleSt. Pateraki, D.N. Asimakopoulos, Thomas Maggos, V.D. Assimakopoulos, Aikaterini Bougiatioti, K. Bairachtari, Ch. Vasilakos, N. Mihalopoulos. Chemical characterization, sources and potential health risk of PM2.5 and PM1 pollution across the Greater Athens Area. Chemosphere. 2019; 241 ():125026.
Chicago/Turabian StyleSt. Pateraki; D.N. Asimakopoulos; Thomas Maggos; V.D. Assimakopoulos; Aikaterini Bougiatioti; K. Bairachtari; Ch. Vasilakos; N. Mihalopoulos. 2019. "Chemical characterization, sources and potential health risk of PM2.5 and PM1 pollution across the Greater Athens Area." Chemosphere 241, no. : 125026.
The aim of this study was to (a) develop a method for converting particle number concentrations (PNC) obtained by Dylos to PM2.5 mass concentrations, (b) compare this conversion with similar methods available in the literature, and (c) compare Dylos PM2.5 obtained using all available conversion methods with gravimetric samples. Data were collected in multiple residences in three European countries using the Dylos and an Aerodynamic Particle Sizer (APS, TSI) in the Netherlands or an optical particle counter (OPC, GRIMM) in Greece. Two statistical fitted curves were developed based on Dylos PNC and either an APS or an OPC particle mass concentrations (PMC). In addition, at the homes of 16 volunteers (UK and Netherlands), Dylos measurements were collected along with gravimetric samples. The Dylos PNC were transformed to PMC using all the fitted curves obtained during this study (and three found in the literature) and were compared with gravimetric samples. The method developed in the present study using an OPC showed the highest correlation (Pearson (R) = 0.63, Concordance (ρc ) = 0.61) with gravimetric data. The other methods resulted in an underestimation of PMC compared to gravimetric measurements (R = 0.65-0.55, ρc = 0.51-0.24). In conclusion, estimation of PM2.5 concentrations using the Dylos is acceptable for indicative purposes.
Remy Franken; Thomas Maggos; Asimina Stamatelopoulou; Miranda Loh; Eelco Kuijpers; John Bartzis; Suzanne Steinle; John W. Cherrie; Anjoeka Pronk. Comparison of methods for converting Dylos particle number concentrations to PM2.5 mass concentrations. Indoor Air 2019, 29, 450 -459.
AMA StyleRemy Franken, Thomas Maggos, Asimina Stamatelopoulou, Miranda Loh, Eelco Kuijpers, John Bartzis, Suzanne Steinle, John W. Cherrie, Anjoeka Pronk. Comparison of methods for converting Dylos particle number concentrations to PM2.5 mass concentrations. Indoor Air. 2019; 29 (3):450-459.
Chicago/Turabian StyleRemy Franken; Thomas Maggos; Asimina Stamatelopoulou; Miranda Loh; Eelco Kuijpers; John Bartzis; Suzanne Steinle; John W. Cherrie; Anjoeka Pronk. 2019. "Comparison of methods for converting Dylos particle number concentrations to PM2.5 mass concentrations." Indoor Air 29, no. 3: 450-459.
Indoor air pollution has been implicated in an array of detrimental health effects. Although infants and young children spend most of their day inside their home residence, information regarding their exposure to indoor pollutants is still limited. Therefore, the objectives of this study were: a) to characterize the concentrations of particulate matter (PM) and total volatile organic compounds (TVOCs) that young children are exposed to; b) to define comfort parameters for living rooms and children's bedrooms; c) to identify the determinants of indoor PM and TVOC concentrations; and d) to examine how the socioeconomic status of inhabitants and their daily activities affect diurnal variations in these indoor pollutants. In this context, a study of PM, TVOCs, and comfort parameters was conducted in Athens, Greece, in residences with young children below three years of age. Sampling campaigns were conducted over a 6–7 day period using real time monitoring. The mean indoor PM1, PM2.5, and PM10 concentrations were 8.1, 10.6, and 20.9 μg/m3, respectively. Mean concentrations of TVOCs ranged between 24 μg/m3 and 890 μg/m3, indicating high variance across the studied dwellings. Carbon dioxide (CO2) levels exceeded the reference value of 1000 ppm in several residences, especially in children's bedrooms, while air exchange rates (AERs) were found to be lower than 0.5 h−1 in all the studied houses. The results indicated that both PM and TVOC concentrations were mainly related to the activities of the study participants inside their residences.
A. Stamatelopoulou; D.N. Asimakopoulos; Thomas Maggos. Effects of PM, TVOCs and comfort parameters on indoor air quality of residences with young children. Building and Environment 2019, 150, 233 -244.
AMA StyleA. Stamatelopoulou, D.N. Asimakopoulos, Thomas Maggos. Effects of PM, TVOCs and comfort parameters on indoor air quality of residences with young children. Building and Environment. 2019; 150 ():233-244.
Chicago/Turabian StyleA. Stamatelopoulou; D.N. Asimakopoulos; Thomas Maggos. 2019. "Effects of PM, TVOCs and comfort parameters on indoor air quality of residences with young children." Building and Environment 150, no. : 233-244.
Core-shell nanospheres, CSNp, consisting of silica as a core and zinc oxide as a shell were prepared via a simple and environmentally friendly procedure. Silica cores with a mean diameter of 300 nm were prepared through the hydrolysis-condensation reactions in the presence of hyperbranched poly(ethylene)imine (HBPEI) followed by calcination and chemical surface modification with the use of HBPEI. To fabricate the core-shell structure, various amounts of zinc nitrate hexahydrate were precipitated using the carboxymethyl poly(ethylene)imine polymer (Trilon P) as a precipitator. To this suspension, the as synthesized modified silica powder was added with the aim to develop electrostatic bonds between the carboxyl groups of TRILON P and the amino groups of the cationic HBPEI polymer. The optimization of processing parameters led to the development of homogeneous core-shell structures bearing a well-developed nanocrystalline zinc oxide shell over each silica core. The material with the optimum shell showed excellent photocatalytic activity over nitric oxides as the photocatalytic yield reached 72.9%.
I. Kitsou; P. Panagopoulos; Thomas Maggos; A. Tsetsekou. ZnO-coated SiO2 nanocatalyst preparation and its photocatalytic activity over nitric oxides as an alternative material to pure ZnO. Applied Surface Science 2018, 473, 40 -48.
AMA StyleI. Kitsou, P. Panagopoulos, Thomas Maggos, A. Tsetsekou. ZnO-coated SiO2 nanocatalyst preparation and its photocatalytic activity over nitric oxides as an alternative material to pure ZnO. Applied Surface Science. 2018; 473 ():40-48.
Chicago/Turabian StyleI. Kitsou; P. Panagopoulos; Thomas Maggos; A. Tsetsekou. 2018. "ZnO-coated SiO2 nanocatalyst preparation and its photocatalytic activity over nitric oxides as an alternative material to pure ZnO." Applied Surface Science 473, no. : 40-48.
This paper aims to identify the chemical fingerprints of potential PM2.5 sources and estimate their contribution to Thessaloniki port-city's air quality. For this scope, Positive Matrix Factorization model was applied on a comprehensive PM2.5 dataset collected over a one-year period, at two sampling sites: the port and the city center. The model indicated six and five (groups of) sources contributing to particle concentration at the two sites, respectively. Traffic and biomass burning (winter months) comprise the major local PM sources for Thessaloniki (their combined contribution can exceed 70%), revealing two of the major control-demanding problems of the city. Shipping and in-port emissions have a non-negligible impact (average contribution to PM2.5: 9–13%) on both primary and secondary particles. Road dust factor presents different profile and contribution at the two sites (19.7% at the port; 7.4% at the city center). The secondary-particle factor represents not only the aerosol transportation over relatively long distances, but also a part of traffic-related pollution (14% at the port; 34% at the city center). The study aims to contribute to the principal role of quantitative information on emission sources (source apportionment) in port-cities for the implementation of the air quality directives and guidelines for public health.
Dikaia E. Saraga; Evangelos I. Tolis; Thomas Maggos; Christos Vasilakos; John G. Bartzis. PM2.5 source apportionment for the port city of Thessaloniki, Greece. Science of The Total Environment 2018, 650, 2337 -2354.
AMA StyleDikaia E. Saraga, Evangelos I. Tolis, Thomas Maggos, Christos Vasilakos, John G. Bartzis. PM2.5 source apportionment for the port city of Thessaloniki, Greece. Science of The Total Environment. 2018; 650 ():2337-2354.
Chicago/Turabian StyleDikaia E. Saraga; Evangelos I. Tolis; Thomas Maggos; Christos Vasilakos; John G. Bartzis. 2018. "PM2.5 source apportionment for the port city of Thessaloniki, Greece." Science of The Total Environment 650, no. : 2337-2354.
An integrated indoor-outdoor 15-day PM sampling campaign in a general area close to the centre of Athens, targeted to examine personal exposure. All microenvironments (MEs) (second and fourth floor flats, cafes, cars, restaurants, underground metro, outdoor etc.) frequented by the residents were included in the study. The instrumentation used was both stationary (low volume samplers) and portable/wearable to be able to measure continuously PM, PM, PM and analyze chemically PM and PM samples. The study showed that the residences' air quality was determined by the type and intensity of outdoor sources and their vertical distance from the street. Indoor activities such as cooking, cleaning further increased PM levels and formulated the air quality, while particulate accumulation was evident. In general, PM concentrations were higher outdoors, 11-43 μg/m, than in the second floor flat as well as on days within different MEs, 13-33 μg/m and 8-35 μg/m, respectively and finally in the fourth floor 10-18 μg/m. PM chemical composition was typical of a Mediterranean urban area predominantly composed on average of OC/EC (33%), sulfate (13%), ammonium (9%), nitrate (5%) and crustal material (Cl-, Na, K, Mg and Ca) (5%). On days when other MEs were visited crustal material increased on average to 16%. The PM levels measured with the portable instrumentation at all mEs showed that the persons were exposed to higher PM concentrations in the subway (avg. 218 μg/m) due to the resuspension of crustal material, while maximum PM and PM were experienced in cafes where smoking was allowed (avg. 126 and 108 μg/m, respectively). Using the car resulted to the lowest PM, PM and PM exposure (58, 10 and 6 μg/m, respectively). Total exposure to particulates depended both on the time spent in each ME and on the mixture of MEs visited in 24 h.
V.D. Assimakopoulos; T. Bekiari; S. Pateraki; Thomas Maggos; P. Stamatis; P. Nicolopoulou; M.N. Assimakopoulos. Assessing personal exposure to PM using data from an integrated indoor-outdoor experiment in Athens-Greece. Science of The Total Environment 2018, 636, 1303 -1320.
AMA StyleV.D. Assimakopoulos, T. Bekiari, S. Pateraki, Thomas Maggos, P. Stamatis, P. Nicolopoulou, M.N. Assimakopoulos. Assessing personal exposure to PM using data from an integrated indoor-outdoor experiment in Athens-Greece. Science of The Total Environment. 2018; 636 ():1303-1320.
Chicago/Turabian StyleV.D. Assimakopoulos; T. Bekiari; S. Pateraki; Thomas Maggos; P. Stamatis; P. Nicolopoulou; M.N. Assimakopoulos. 2018. "Assessing personal exposure to PM using data from an integrated indoor-outdoor experiment in Athens-Greece." Science of The Total Environment 636, no. : 1303-1320.
In an attempt to investigate the traffic-impacted vertical aerosols profile and its relationship with potential carcinogenicity and/or mutagenicity, samples of different sized airborne particles were collected in parallel at the 1st and 5th floor of a 19 m high building located next to one of the busiest roads of Athens. The maximum daily concentrations were 65.9, 42.5 and 38.5 μg/m3, for PM10, PM2.5 and PM1, respectively. The vertical concentration ratio decreased with increasing height verifying the role of the characteristics of the area (1st/5th floor: 1.21, 1.13, 1.09 for PM10, PM2.5 and PM1, respectively). Chemically, strengthening the previous hypothesis, the collected particles were mainly carbonaceous (68%–93%) with the maximum budget of the polyaromatic hydrocarbons being recorded near the surface (1st/5th floor: 1.84, 1.07, 1.15 for PM10, PM2.5 and PM1, respectively). The detected PM-bound PAHs along with the elements as well as the carbonaceous and ionic constituents were used in a source apportionment study. Exhaust and non-exhaust emissions, a mixed source of biomass burning and high temperature combustion processes (natural gas, gasoline/diesel engines), sea salt, secondary and soil particles were identified as the major contributing sources to the PM pollution of the investigated area. With respect to the health hazards, the calculation of the Benzo[a]Pyrene toxicity equivalency factors underlined the importance of the height of residence in buildings for the level of the exposure (1st/5th floor: B[a]PTEQ: 1.82, 1.12, 1.10, B[a]PMEQ: 1.85, 1.13, 1.09 for PM10, PM2.5 and PM1, respectively). Finally, despite its verified significance as a surrogate compound for the mixture of the hydrocarbons (its contribution up to 72%, 79% on the level of the 1st and 5th floor, respectively), the importance of the incorporation of PAH species in addition to B[a]P when assessing PAH toxicity was clearly documented.
St. Pateraki; Manousos Manousakas; K. Bairachtari; V. Kantarelou; Konstantinos Eleftheriadis; Ch. Vasilakos; V.D. Assimakopoulos; Thomas Maggos. The traffic signature on the vertical PM profile: Environmental and health risks within an urban roadside environment. Science of The Total Environment 2018, 646, 448 -459.
AMA StyleSt. Pateraki, Manousos Manousakas, K. Bairachtari, V. Kantarelou, Konstantinos Eleftheriadis, Ch. Vasilakos, V.D. Assimakopoulos, Thomas Maggos. The traffic signature on the vertical PM profile: Environmental and health risks within an urban roadside environment. Science of The Total Environment. 2018; 646 ():448-459.
Chicago/Turabian StyleSt. Pateraki; Manousos Manousakas; K. Bairachtari; V. Kantarelou; Konstantinos Eleftheriadis; Ch. Vasilakos; V.D. Assimakopoulos; Thomas Maggos. 2018. "The traffic signature on the vertical PM profile: Environmental and health risks within an urban roadside environment." Science of The Total Environment 646, no. : 448-459.
Silica-titania core-shell nanospheres, CSNp, were prepared via a simple and environmentally friendly two step route. First, silica cores were prepared through the hydrolysis-condensation reaction of silicic acid in the presence of hyperbranched poly(ethylene)imine (HBPEI) followed by repeating washing, centrifugation and, finally, calcination steps. To create the core-shell structure, various amounts of titanium isopropoxide were added to the cores and after that a HBPEI-water solution was added to hydrolyze the titanium precursor. Washing with ethanol and heat treatment followed. The optimization of processing parameters led to well-developed core-shell structures bearing a homogeneous nanocrystalline anatase coating over each silica core. The photocatalytic activity for NO was examined in a continuous flux photocatalytic reactor under real environmental conditions. The results revealed a very potent photocatalyst as the degradation percentage reached 84.27% for the core-shell material compared to the 82% of pure titania with the photodecomposition rates measured at 0.62 and 0.55 μg·m-2·s-1, respectively. In addition, catalytic activities of the CSNp and pure titania were investigated by monitoring the reduction of 4-nitrophenol to 4-aminophenol by an excess of NaBH4. Both materials exhibited excellent catalytic activity (100%), making the core-shell material a promising alternative catalyst to pure titania for various applications.
I. Kitsou; P. Panagopoulos; Thomas Maggos; M. Arkas; A. Tsetsekou. Development of [email protected] core-shell nanospheres for catalytic applications. Applied Surface Science 2018, 441, 223 -231.
AMA StyleI. Kitsou, P. Panagopoulos, Thomas Maggos, M. Arkas, A. Tsetsekou. Development of [email protected] core-shell nanospheres for catalytic applications. Applied Surface Science. 2018; 441 ():223-231.
Chicago/Turabian StyleI. Kitsou; P. Panagopoulos; Thomas Maggos; M. Arkas; A. Tsetsekou. 2018. "Development of [email protected] core-shell nanospheres for catalytic applications." Applied Surface Science 441, no. : 223-231.
The European Union's 7th Framework Programme (EU's FP7) project HEALS – Health and Environment-wide Associations based on Large Population Surveys – aims a refinement of the methodology to elucidate the human exposome. Human biomonitoring (HBM) provides a valuable tool for understanding the magnitude of human exposure from all pathways and sources. However, availability of specific biomarkers of exposure (BoE) is limited. The objective was to summarize the availability of BoEs for a broad range of environmental stressors and exposure determinants and corresponding reference and exposure limit values and biomonitoring equivalents useful for unraveling the exposome using the framework of environment-wide association studies (EWAS). In a face-to-face group discussion, scope, content, and structure of the HEALS deliverable “Guidelines for appropriate BoE selection for EWAS studies” were determined. An expert-driven, distributed, narrative review process involving around 30 individuals of the HEALS consortium made it possible to include extensive information targeted towards the specific characteristics of various environmental stressors and exposure determinants. From the resulting 265 page report, targeted information about BoE, corresponding reference values (e.g., 95th percentile or measures of central tendency), exposure limit values (e.g., the German HBM I and II values) and biomonitoring equivalents (BEs) were summarized and updated. 64 individual biological, chemical, physical, psychological and social environmental stressors or exposure determinants were included to fulfil the requirements of EWAS. The list of available BoEs is extensive with a number of 135; however, 12 of the stressors and exposure determinants considered do not leave any measurable specific substance in accessible body specimens. Opportunities to estimate the internal exposure stressors not (yet) detectable in human specimens were discussed. Data about internal exposures are useful to decode the exposome. The paper provides extensive information for EWAS. Information included serves as a guideline – snapshot in time without any claim to comprehensiveness – to interpret HBM data and offers opportunities to collect information about the internal exposure of stressors if no specific BoE is available.
Nadine Steckling; Alberto Gotti; Stephan Bose-O’Reilly; Dimitriοs Chapizanis; Danae Costopoulou; Frank de Vocht; Mercè Garí; Joan O. Grimalt; Ester Heath; Rosemary Hiscock; Marta Jagodic; Spyros P. Karakitsios; Kleopatra Kedikoglou; Tina Kosjek; Leondios Leondiadis; Thomas Maggos; Darja Mazej; Kinga Polanska; Andrew Povey; Joaquim Rovira; Julia Schoierer; Marta Schuhmacher; Zdravko Spiric; Anja Stajnko; Rob Stierum; Janja Snoj Tratnik; Irene Vassiliadou; Isabella Annesi-Maesano; Milena Horvat; Dimosthenis Sarigiannis. Biomarkers of exposure in environment-wide association studies – Opportunities to decode the exposome using human biomonitoring data. Environmental Research 2018, 164, 597 -624.
AMA StyleNadine Steckling, Alberto Gotti, Stephan Bose-O’Reilly, Dimitriοs Chapizanis, Danae Costopoulou, Frank de Vocht, Mercè Garí, Joan O. Grimalt, Ester Heath, Rosemary Hiscock, Marta Jagodic, Spyros P. Karakitsios, Kleopatra Kedikoglou, Tina Kosjek, Leondios Leondiadis, Thomas Maggos, Darja Mazej, Kinga Polanska, Andrew Povey, Joaquim Rovira, Julia Schoierer, Marta Schuhmacher, Zdravko Spiric, Anja Stajnko, Rob Stierum, Janja Snoj Tratnik, Irene Vassiliadou, Isabella Annesi-Maesano, Milena Horvat, Dimosthenis Sarigiannis. Biomarkers of exposure in environment-wide association studies – Opportunities to decode the exposome using human biomonitoring data. Environmental Research. 2018; 164 ():597-624.
Chicago/Turabian StyleNadine Steckling; Alberto Gotti; Stephan Bose-O’Reilly; Dimitriοs Chapizanis; Danae Costopoulou; Frank de Vocht; Mercè Garí; Joan O. Grimalt; Ester Heath; Rosemary Hiscock; Marta Jagodic; Spyros P. Karakitsios; Kleopatra Kedikoglou; Tina Kosjek; Leondios Leondiadis; Thomas Maggos; Darja Mazej; Kinga Polanska; Andrew Povey; Joaquim Rovira; Julia Schoierer; Marta Schuhmacher; Zdravko Spiric; Anja Stajnko; Rob Stierum; Janja Snoj Tratnik; Irene Vassiliadou; Isabella Annesi-Maesano; Milena Horvat; Dimosthenis Sarigiannis. 2018. "Biomarkers of exposure in environment-wide association studies – Opportunities to decode the exposome using human biomonitoring data." Environmental Research 164, no. : 597-624.
Vassilios Binas; Dimitra Papadaki; Thomas Maggos; A. Katsanaki; G. Kiriakidis. Study of innovative photocatalytic cement based coatings: The effect of supporting materials. Construction and Building Materials 2018, 168, 923 -930.
AMA StyleVassilios Binas, Dimitra Papadaki, Thomas Maggos, A. Katsanaki, G. Kiriakidis. Study of innovative photocatalytic cement based coatings: The effect of supporting materials. Construction and Building Materials. 2018; 168 ():923-930.
Chicago/Turabian StyleVassilios Binas; Dimitra Papadaki; Thomas Maggos; A. Katsanaki; G. Kiriakidis. 2018. "Study of innovative photocatalytic cement based coatings: The effect of supporting materials." Construction and Building Materials 168, no. : 923-930.
Nowadays, the advancement of mobile technology in conjunction with the introduction of the concept of exposome has provided new dynamics to the exposure studies. Since the addressing of health outcomes related to environmental stressors is crucial, the improvement of exposure assessment methodology is of paramount importance. Towards this aim, a pilot study was carried out in the two major cities of Greece (Athens, Thessaloniki), investigating the applicability of commercially available fitness monitors and the Moves App for tracking people’s location and activities, as well as for predicting the type of the encountered location, using advanced modeling techniques. Within the frame of the study, 21 individuals were using the Fitbit Flex activity tracker, a temperature logger, and the application Moves App on their smartphones. For the validation of the above equipment, participants were also carrying an Actigraph (activity sensor) and a GPS device. The data collected from Fitbit Flex, the temperature logger, and the GPS (speed) were used as input parameters in an Artificial Neural Network (ANN) model for predicting the type of location. Analysis of the data showed that the Moves App tends to underestimate the daily steps counts in comparison with Fitbit Flex and Actigraph, respectively, while Moves App predicted the movement trajectory of an individual with reasonable accuracy, compared to a dedicated GPS. Finally, the encountered location was successfully predicted by the ANN in most of the cases.
Stamatelopoulou Asimina; Dimitriοs Chapizanis; S. Karakitsios; P. Kontoroupis; D. N. Asimakopoulos; Thomas Maggos; Dimosthenis Sarigiannis. Assessing and enhancing the utility of low-cost activity and location sensors for exposure studies. Environmental Monitoring and Assessment 2018, 190, 155 .
AMA StyleStamatelopoulou Asimina, Dimitriοs Chapizanis, S. Karakitsios, P. Kontoroupis, D. N. Asimakopoulos, Thomas Maggos, Dimosthenis Sarigiannis. Assessing and enhancing the utility of low-cost activity and location sensors for exposure studies. Environmental Monitoring and Assessment. 2018; 190 (3):155.
Chicago/Turabian StyleStamatelopoulou Asimina; Dimitriοs Chapizanis; S. Karakitsios; P. Kontoroupis; D. N. Asimakopoulos; Thomas Maggos; Dimosthenis Sarigiannis. 2018. "Assessing and enhancing the utility of low-cost activity and location sensors for exposure studies." Environmental Monitoring and Assessment 190, no. 3: 155.