Fabrication of a label-free electrochemical cell-based biosensor for toxicity assessment of thiram

Chemosphere, Год журнала: 2022, Номер 307, С. 135960 - 135960

Опубликована: Авг. 10, 2022

Язык: Английский

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PM10 Resuspension of Road Dust in Different Types of Parking Lots: Emissions, Chemical Characterisation and Ecotoxicity

Atmosphere, Год журнала: 2023, Номер 14(2), С. 305 - 305

Опубликована: Фев. 3, 2023

The thoracic fraction of road dust (PM10) was measured for the first time in Portugal parking areas, both outdoors and indoors, with aim completing existing studies carried out active lanes various roads. An situ resuspension chamber used to collect a total 23 samples three areas Aveiro, whilst laboratory procedures included determination carbonaceous content (OC EC) by thermo-optical technique, elemental composition ICP-MS ICP-OES after acid digestion, Aliivribrio fisherii bioluminescent bacteria ecotoxicity bioassay. Dust loadings (DL10) obtained were 18.5 ± 9.8 mg PM10 m−2, outdoor parking, 1.8–23.7 m−2 indoor corresponding emission factors 476 75–589 veh−1 km−1, respectively. OC represented 9–30 % areas. However, samples, high iron oxide jeopardised OC-EC separation. In those carbonates accounted 10.0 3.3% mass. analysis components focused on major elements (Al, Ca, Fe, K, Mg) as well minor elements. mass element oxides 27.1% (outdoor) 23.6–34.3% (indoor). ΣPAH calculated all 8.38–36.9 μg g−1 PM10. ecotoxicological bioassay showed that aqueous solutions toxic bacteria, whereas no clear correlations could be made specific component groups, exception EC50.

Язык: Английский

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Respiratory deposition dose of PM2.5 and PM10 during night and day periods at an urban environment

Air Quality Atmosphere & Health, Год журнала: 2023, Номер 16(11), С. 2269 - 2283

Опубликована: Авг. 8, 2023

Abstract Inhalation of particulate matter (PM) has been extensively associated with the worsening and onset cardiorespiratory diseases, being responsible for millions deaths annually. Assessment PM deposition in human respiratory tract is critical to better understand health risks from environmental exposure vulnerable age groups. In this study, 2.5 10 day-night monitoring campaigns during cold season were carried out Bragança, Portugal. The multiple-path particle dosimetry (MPPD) model was used quantify total regional depositions four different groups: infant (3 months), child (9 years), adult (21 years) elderly (65 years). results showed that concentrations both fractions higher night, a period marked by burning biomass residential heating. Regional (DF) ranges 17–38% (head), 4–14% (tracheobronchial) 20–28% (pulmonary), while 24–67% 4–27% 12–22% (pulmonary). Children found be most groups deposition, especially TB H regions, respectively. lifetime cancer non-cancer exceeded recommended limits, children <10 years old. These findings provide useful information alert authorities need take action reduce pollution burden protect health, particular those susceptible. Graphical

Язык: Английский

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Indoor PM from residential coal combustion: Levels, chemical composition, and toxicity

The Science of The Total Environment, Год журнала: 2024, Номер 918, С. 170598 - 170598

Опубликована: Фев. 8, 2024

Язык: Английский

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Physicochemical and toxicological properties of wood smoke particulate matter as a function of wood species and combustion condition

Journal of Hazardous Materials, Год журнала: 2022, Номер 441, С. 129874 - 129874

Опубликована: Сен. 1, 2022

Язык: Английский

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Road dust resuspension in a coastal Atlantic intermunicipal urban area with industrial facilities: Emission factors, chemical composition and ecotoxicity

Atmospheric Research, Год журнала: 2023, Номер 294, С. 106977 - 106977

Опубликована: Авг. 25, 2023

Road dust resuspension in urban environments can be both a means of transport pollutants across the various environmental compartments and source itself, becoming potential threat to human health. With aim obtaining emission factors achieving detailed chemical characterisation road (RD) typical Portuguese cities, sampling campaign was performed region Aveiro. Locations were chosen for intercomparison with different land uses, from busier city centre university campus residential neighbourhoods harbour-commercial areas industrial activities. PM10 samples analysed organic elemental carbon (OC EC) by thermal-optical technique, composition PIXE, speciation GC–MS, ecotoxicology luminescence inhibition bioassay Aliivibrio fischeri. A health risk assessment elements PAHs carried out. Dust loadings 1.9 ± 1.8 mg m−2 registered overall, whereas most trafficked they reached more than three times average. OC accounted 6.5–15.5% total PM10, but element oxides represented largest mass fraction (61.4 8.6%). strong enrichment detected mostly traffic-related such as Cu, Zn, As, Br, Cr, Ni Mo interestingly, Rb Se. The compounds 3.66–11.0 g−1 including aliphatics, clear dominance plasticisers. Some other attributed non-vehicle sources, fatty acid alkyl esters, also detected. As concerns 16 priority PAHs, their concentration ranged 5.58 36.3 μg variability between spots. All caused an ecotoxicological reaction bioassay, harbour commercial proved toxic.

Язык: Английский

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Impact of different sources on the oxidative potential of ambient particulate matter PM10 in Riyadh, Saudi Arabia: A focus on dust emissions

The Science of The Total Environment, Год журнала: 2021, Номер 806, С. 150590 - 150590

Опубликована: Сен. 29, 2021

Язык: Английский

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Nighttime–daytime PM10 source apportionment and toxicity in a remoteness inland city of the Iberian Peninsula

Atmospheric Environment, Год журнала: 2023, Номер 303, С. 119771 - 119771

Опубликована: Апрель 11, 2023

The distribution of daytime and nighttime sources PM10 collected from January to March 2021 at an urban background site in the city Bragança, Portugal, was performed using positive matrix factorisation (PMF). Additional data PM2.5, NOx meteorological variables were support interpretations. A solution with 5 factor profiles found: traffic (33%), dust (24%), biomass burning (21%), secondary inorganic aerosol (SIA) (12%) sea salt (10%). Mean concentrations 43.1 μg m−3 46.1 m−3, respectively. Nighttime dominated by residential combustion. Vehicle factors showed significantly greater contributions during day (+12% +4%, respectively), suggesting that exhaust non-exhaust emissions long-range transport are important contributors levels. In contrast, there no significant differences between night for SIA salt. Exceedances daily limit (50 m−3) PM2.5 (15 observed 22 (33%) 27 (40%) days campaign, respectively, mostly associated heating, but also Saharan outbreaks. application Aliivibrio fischeri bioluminescence inhibition assay ecotoxicity assessment allowed classifying 70% samples as toxic, especially those nocturnal period, indicating is one main responsible toxicity. Both estimated PMF multiple tracers this source statistically correlations toxicity units.

Язык: Английский

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Toxicological screening of PM2.5 from wildfires involving different biomass fuels

Environmental Pollution, Год журнала: 2025, Номер unknown, С. 125887 - 125887

Опубликована: Фев. 1, 2025

Wildfires are becoming increasingly frequent and severe, particularly in Southern Europe. In addition to their immediate environmental socioeconomic impacts, wildfires release significant amounts of particulate matter (PM), which poses serious health ecological risks. Gaseous (CO CO2) PM2.5 samples were collected directly from smoke plumes, the modified combustion efficiency (MCE) was calculated characterise conditions. This study aims assess cytotoxicity, mutagenicity ecotoxicity during Portugal, with a focus on how varying biomass types conditions impact these effects. Ecotoxicity assessments using Aliivibrio fischeri showed that ranged toxic extremely toxic, mixed vegetation burns (eucalyptus, acacia, ferns) exhibiting highest toxicity levels. Cytotoxicity tests human lung epithelial cells (A549) demonstrated dose-dependent decrease metabolic activity no membrane damage, while assays identified direct-acting mutagens smouldering acacia debris combustion, specifically inducing frameshift mutations Salmonella typhimurium strain TA98. Root growth inhibition toxicity, some samples, instead, promoting probably due nutrient content. Peroxidase responses indicated that, at higher concentrations, enzyme function could be reduced if defence mechanisms overwhelmed or stimulated high These findings highlight complex toxicological profiles wildfire PM, emphasising need for further research.

Язык: Английский

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Indoor environments: Evaluating air quality in Ulaanbaatar's traditional gers

Chemosphere, Год журнала: 2025, Номер 377, С. 144338 - 144338

Опубликована: Март 27, 2025

Ulaanbaatar (capital of Mongolia) is struggling with serious air pollution. In the so-called ger districts city, approximately 60 % population live in traditional Mongolian dwellings called gers, mostly relying on coal for winter heating. This study investigates PAH concentrations and associated health risks 6 gers situated Songinokhairkhan district. The majority (5 out 6) were characterized by dominance higher molecular weight, 5-and 6-ring-PAHs. two sampled (G3 4), total PAHs extremely high, reaching 38700 μg/g 36200 μg/g. Using a Gradient Boosting Machine algorithm, we identified key PAHs-pyrene, benzanthracene, phenanthrene-as primary indicators distinguishing high (G2-4) versus low (Gers1, 5, levels. Incremental Lifetime Cancer Risk (ILCR) assessments both adults children revealed that Gers 3 4 present highest PAH-related cancer risks, benzo(a)pyrene contributing substantially. Principal Component Analysis (PCA) further underscored distinct profiles across sites, dissimilarity matrix significant variation, particularly between 5. Additionally, decision tree analysis highlighted Ger as having most characteristics. combination altitudes, cold continental climate, reliance combustion within these emphasizes potential persistent pollutant buildup, during winter. Our results underscore urgent need interventions Mongolia similar Central Asian regions, where indoor quality severely affected heating practices, to elevated long-term risks.

Язык: Английский

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