A 1-Year Sediment Trap Study on the Downward Flux of Polycyclic Aromatic Hydrocarbons by Settling Particulate Matter in Deep Basins of the Aegean and Ionian Seas, Northeastern Mediterranean DOI Creative Commons

Ester Skylaki,

Constantine Parinos,

Maria Tsagkaraki

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 13(1), P. 47 - 47

Published: Dec. 31, 2024

This study investigates the composition, abundance, and vertical export of polycyclic aromatic hydrocarbons (PAHs) across three deep basins northeastern Mediterranean Sea (NEMS) over one year. Sinking particles were collected using sediment traps, PAH analysis was conducted via gas chromatography-mass spectrometry. fluxes varied significantly, peaking in north Aegean due to mesotrophic conditions, nutrient-rich riverine Black water inflows, maritime anthropogenic inputs. The highest winter lowest fall. In Cretan Sea, petrogenic sources (~70%) dominated, driven by currents, with spring winter. Ionian exhibited lower fluxes, summer decreasing Atmospheric deposition seems be main transport pathway pyrolytic PAHs this site, while its high-water column depth (4300 m) compared other sites presumably enables extended degradation organic constituents during particle settling. positive matrix factorization (PMF) principal component (PCA) results reveal complementary insights into mechanisms. PMF identified combustion (61%) (22%) sources, PCA highlighted biogenic (57.7%) atmospheric deposition. Seasonal productivity, inputs, circulation shaped variability, linking combustion-related soot organic-rich particles.

Language: Английский

Recent advancements on elimination of emerging contaminants by homogeneous metal-catalyzed sulfur(Ⅳ) oxidation DOI

Shijie Kuang,

Hongbin Wang,

Youlun Su

et al.

Chemical Engineering Science, Journal Year: 2025, Volume and Issue: unknown, P. 121320 - 121320

Published: Feb. 1, 2025

Language: Английский

Citations

0
Atmospheric polycyclic aromatic hydrocarbon (PAH) concentrations in a semi-urban site: temporal variation, risk assessment, source identification and estimation of levels in diverse environments DOI Creative Commons
Burak Çalışkan, Semra Celik, Ahmet Egemen Sakın

et al.

Environmental Toxicology and Chemistry, Journal Year: 2025, Volume and Issue: 44(3), P. 683 - 697

Published: Jan. 22, 2025

Abstract This study evaluates atmospheric polycyclic aromatic hydrocarbon (PAH) concentrations in a semi-urban area, Görükle, Turkey, from June 2021 to February 2022. The average concentration of ∑16 PAHs was 24.85 ± 19.16 ng/m3, ranging 6.70 59.11 ng/m3. Seasonal variations were observed, with winter approximately five times higher than those summer, driven by increased residential heating emissions and adverse meteorological effects. results compared literature values, revealing lower PAH levels found other urban industrial areas. Meteorological factors statistically analyzed. Polycyclic exhibited an inverse relationship temperature mixing height, while relative humidity showed positive linear correlation. also estimated various environmental media using gas-particle partitioning equilibrium models. the particulate phase minimal, suggesting that most present gas phase. Additionally, soil, leaves, bark, water modeled, emphasizing accumulation heavier these yet 2- 3-ring predominant ambient air samples. Source apportionment principal component analysis studies identified vehicle combustion for purposes as primary sources pollution. However, mass trajectory indicated contributions Kocaeli, area significant activity. cancer risk assessment yielded low risks both adults children.

Language: Английский

Citations

0
Characterization, sources, and risk assessment of atmospheric PM10-bound NPAHs and OPAHs in the core area of the Ili River Valley, China DOI Creative Commons

Yaqin Ji,

Yang Xiao,

Miao Wang

et al.

Ecotoxicology and Environmental Safety, Journal Year: 2025, Volume and Issue: 291, P. 117858 - 117858

Published: Feb. 1, 2025

Statistical data indicate that Xinjiang is having the second-highest particulate matter emissions in China over past two years, yet relevant research are scarce. PM10 includes a variety of toxic organic substances, including nitro-PAHs (NPAHs) and oxy-PAHs (OPAHs). The objective this study was to characterize ascertain sources PM10-bound NPAHs OPAHs core area Ili River Valley. To analyze 18 5 OPAHs, gas chromatography-mass spectrometry (GC-MS) employed, revealing median concentrations 449.09 pg/m3 for Σ18NPAHs 9.38 ng/m3 Σ5OPAHs. levels were higher heating season (Σ18NPAHs: 641.97 pg/m3; Σ5OPAHs: 16.41 ng/m3) than non-heating 268.68 2.61 During season, urban areas rural areas, with reverse trend noted season. Source apportionment, conducted through characteristic ratio method positive matrix factorization (PMF), identified coal/biomass combustion as primary source OPAHs. Moreover, increase inhalation dermal contact lifetime cancer risk (ILCR) values all sampling sites, seasons, age categories within Valley ranged from 2.05E-11-5.02E-08, 7.59E-13-1.26E-09, respectively. These below 10-6, suggesting absence carcinogenic exposure these contaminants.

Language: Английский

Citations

0
Impacts of COVID-19 lockdown on PM2.5-bound polycyclic aromatic hydrocarbons in Hohhot, Northern China: characteristics, sources, and source-specific health risks DOI Creative Commons
Kunmei Ji,

Bing Sun,

Haijun Zhou

et al.

Environmental Health, Journal Year: 2025, Volume and Issue: 24(1)

Published: Feb. 26, 2025

Quantifying the impacts of reduction strategies on PM2.5-bound polycyclic aromatic hydrocarbons (PAHs) is essential for reducing health risks PM2.5. The COVID-19 lockdown provided an opportunity to reveal quantitative relationship between measures and PAHs. In this study, characteristics, sources, PAHs were investigated during in Hohhot. source-specific assessed using a combination incremental lifetime cancer risk models (ILCR) positive matrix factorization (PMF). Compared with pre-LD period (pre-LD, 87.41 ± 5.98 ng·m-3), total concentration ∑PAHs (LD, 32.52 2.31 ng·m-3) decreased by 62.8% Coal combustion (51.5%), gasoline emissions (21.9%), diesel (12.9%), industrial (9.3%), biomass burning (4.7%) predominant sources Except male children, ILCR all groups exceeded threshold high (1 × 10− 4). Dermal contact exposure pathway carcinogenic risk. period, values 62.5–62.7% LD period. PMF-ILCR results indicated that (29.1%), coal (28.4%), (18.5%) main ∑ILCR. A Monte Carlo simulation revealed cumulative at 95th percentile six 1.5–6.3 times These emphasize regulating effective cities large consumption.

Language: Английский

Citations

0
Profiling aerosol Polycyclic Aromatic Compounds (PACs) in a severely polluted European city: A comprehensive assessment of the residential biomass burning impact on atmospheric toxicity DOI Creative Commons
Irini Tsiodra, Georgios Grivas, Kalliopi Tavernaraki

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 494, P. 138431 - 138431

Published: April 28, 2025

Fine aerosol Polycyclic Aromatic Hydrocarbons (PAHs), Oxygenated (OPAHs) and other PM2.5 components were quantified in Ioannina, a Southeastern European city facing severe air quality degradation due to residential biomass burning (BB). Compound (PAC) seasonal means extremely enhanced winter compared summer (by 98 88 times for PAHs OPAHs, respectively). Benzo(a)pyrene (BaP) registered 347-fold increase, its estimated annual mean was 2.4 higher than the EU standard. Medium- high-molecular weight PAC species correlated well with DTTv activity (R2: 0.48 0.54, respectively), suggesting also their significant non-carcinogenic potential. These groups strongly associated methanol- water-soluble Brown Carbon absorption (R2 > 0.7). Source apportionment by Positive Matrix Factorization (PMF) on speciation dataset indicated BB as major source, contributing 80 % average Σ-PAC concentrations carcinogenic potential during study period. The risk assessment highlighted importance of considering inclusion not only legacy but emerging very high toxicity, such Benzo(c)fluorene Dibenzo-pyrenes. Observed alarming, posing substantial short- especially long-term risks. Therefore, there is an urgent need regulate Ioannina similar urban environments SE Europe.

Language: Английский

Citations

0
Spatial characteristics of nitro- and oxy-PAHs during winter in Northeast Asia DOI
Jungmin Jo, Soo Ran Won,

Seungmee Oh

et al.

Atmospheric Environment, Journal Year: 2025, Volume and Issue: unknown, P. 121275 - 121275

Published: May 1, 2025

Language: Английский

Citations

0
Unveiling the organic chemical composition and sources of organic carbon in PM2.5 at an urban site in Greater Cairo (Egypt): A comprehensive analysis of primary and secondary compounds DOI

Eliane Farah,

Marc Fadel,

Gihane Mansour

et al.

Environmental Research, Journal Year: 2024, Volume and Issue: 263, P. 120118 - 120118

Published: Oct. 9, 2024

Language: Английский

Citations

1
Assessment of the Physicochemical Properties of Ultrafine Particles (UFP) from Vehicular Emissions in a Commercial Parking Garage: Potential Health Implications DOI Creative Commons

Nachiket Vaze,

L. Calderon, Irini Tsiodra

et al.

Toxics, Journal Year: 2024, Volume and Issue: 12(11), P. 833 - 833

Published: Nov. 20, 2024

Vehicular emissions are a major culprit in the rise of urban air pollution. The particulate matter (PM) emitted from vehicular sources includes primarily ultrafine particles (UFPs) with aerodynamic diameters less than 0.1 µm (PM

Language: Английский

Citations

0
A 1-Year Sediment Trap Study on the Downward Flux of Polycyclic Aromatic Hydrocarbons by Settling Particulate Matter in Deep Basins of the Aegean and Ionian Seas, Northeastern Mediterranean DOI Creative Commons

Ester Skylaki,

Constantine Parinos,

Maria Tsagkaraki

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 13(1), P. 47 - 47

Published: Dec. 31, 2024

This study investigates the composition, abundance, and vertical export of polycyclic aromatic hydrocarbons (PAHs) across three deep basins northeastern Mediterranean Sea (NEMS) over one year. Sinking particles were collected using sediment traps, PAH analysis was conducted via gas chromatography-mass spectrometry. fluxes varied significantly, peaking in north Aegean due to mesotrophic conditions, nutrient-rich riverine Black water inflows, maritime anthropogenic inputs. The highest winter lowest fall. In Cretan Sea, petrogenic sources (~70%) dominated, driven by currents, with spring winter. Ionian exhibited lower fluxes, summer decreasing Atmospheric deposition seems be main transport pathway pyrolytic PAHs this site, while its high-water column depth (4300 m) compared other sites presumably enables extended degradation organic constituents during particle settling. positive matrix factorization (PMF) principal component (PCA) results reveal complementary insights into mechanisms. PMF identified combustion (61%) (22%) sources, PCA highlighted biogenic (57.7%) atmospheric deposition. Seasonal productivity, inputs, circulation shaped variability, linking combustion-related soot organic-rich particles.

Language: Английский

Citations

0