Seasonal Change of Gas/Particle Partitioning of Atmospheric Dioxins

Oka, Hideo; Kakimoto, Hitoshi; Miyata, Yoshiaki; Yonezawa, Yumiko; Niikawa, Akiko; Kyudoh, Hirohisa; Tang, Ning; Toriba, Akira; Kizu, Ryoichi; Hayakawa, Kazuichi

doi:10.1248/jhs.52.50

Cited by 2 publications

(5 citation statements)

References 13 publications

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“…Selected ion monitoring (SIM) measurements and determination of each isomer for PCDD/DFs were performed as we previously described. 8) Recovery rates of the clean-up spikes of all samples ranged from 50 to 120%.…”

Section: Methodsmentioning

confidence: 99%

“…1) is the same place where ambient air samples were collected in our previous study. 8) This site is 6 km southeast from downtown Kanazawa (a city of 450000 people), and on a hill which rises about 100 m above sea level. The most frequent wind direction during the sampling period at this site was from the south.…”

Section: Methodsmentioning

confidence: 99%

“…The soxhlet extractions were cleaned up as previously reported. 8) Briefly, each extract was solvent exchanged to hexane and this hexane solution was put on a multi-layered silica gel column with cleanup spike solutions. PCDD/DFs were eluted with 200 ml of hexane and fractionated with an active carbon-dispersed silica gel reversible column.…”

Section: Methodsmentioning

confidence: 99%

“…8) Because rain efficiently washes out the particulate phase of PCDD/DFs, 18) the increase of particulate phase of PCDD/DFs in the air is thought to result in the increase of PCDD/DFs deposition.…”

Section: Meteorological Effects On Atmospheric Deposition Fluxmentioning

confidence: 99%

“…Moreover, the gas/particle partition of atmospheric dioxins depends on the temperature. 8) Although the gas/particle partition ratio affects deposition from the atmosphere, few studies have examined the seasonal change of the atmospheric deposition flux (the atmospheric deposition of dioxins per unit area per unit time).…”

Section: Introductionmentioning

confidence: 99%

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Atmospheric Deposition of Polychlorinated Dibenzo-p-dioxins (PCDDs) and Polychlorinated Dibenzofurans (PCDFs) in Kanazawa, Japan

Oka

Kakimoto²,

Miyata³

et al. 2006

JOURNAL OF HEALTH SCIENCE

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Meteorological Effects On Atmospheric Deposition Fluxmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Atmospheric Deposition of Polychlorinated Dibenzo-p-dioxins (PCDDs) and Polychlorinated Dibenzofurans (PCDFs) in Kanazawa, Japan

Oka

Kakimoto²,

Miyata³

et al. 2006

JOURNAL OF HEALTH SCIENCE

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Assessment of Atmospheric Concentrations, Gas/Particle Partitioning, Cancer Risks, Sources, and Atmospheric Transport of PCDD/Fs in a Suburban Area of Bursa, Türkiye

Gülegen,

Noori,

Cindoruk

et al. 2024

Preprint

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Polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) are a very high-priority air pollutant group due to their ability to remain intact for a long time and pose serious threats to human and environmental health. Therefore; most of the PCDD/F research studies have been carried out in urban, industrial areas and in the vicinity of waste incineration plants where these pollutants are expected at high concentrations. There are few studies conducted in rural, semi-rural, and suburban areas worldwide, especially in Türkiye, and determining PCDD/F levels in these areas is very important for evaluating the atmospheric transport of these pollutants. In this study, a sampling campaign covering 12 months (June 2022-June 2023) was conducted in a suburban area in Bursa, Türkiye. Concentration values varied between 168.77 and 327.58 fg/m3. In terms of toxic equivalence, the average concentration was found to be 22.62 ± 3.21 fg I-TEQ/m3. This value was found to be comparable to the results reported for suburban and rural areas worldwide. The influence of the seasonal effect on concentrations was seen as the lower and upper-end concentration values of 17.15 and 26.54 fg I-TEQ/m3 were measured in summer and winter, respectively. A strong negative correlation (r=-0.84, p < 0.001) was observed between total concentration values and temperature while weak correlations were observed with other meteorological parameters. A positive correlation was found between low chlorinated congener gas phase concentrations and ambient temperature using Clausius-Clapeyron. PCDD/Fs were found to have existed in the particle phase at an average ratio of 75.05 ± 5.85%. It was determined that no equilibrium state was reached in the gas/particle partitioning and both adsorption and absorption mechanisms were effective in the transitions. In the study, the performance of 7 different gas/particle partitioning models was evaluated. According to their performance, the models were ranked as Harner-Bidleman ≈ Dachs-Eisenreich > Li-Ma-Yang > Junge-Pankow ≈ pp-LFER > QSPR > mp-pp-LFER. The performance of the models in the equilibrium (EQ), non-equilibrium (NE), and maximum partitioning (MP) domains were also analyzed. Principal Component Analysis (PCA) showed that the main pollutant source in the region is traffic emissions. Back trajectory analysis indicated that air masses were transported to the sampling point from the organized industrial zones. Although these air masses have an impact on the congener profile, it is found that the total concentrations are mainly characterized by congeners originating from traffic emissions. Cancer risk was calculated for primary school children, nursery school children, and adults, and values of 3.28×10− 8, 3.86×10− 8, and 3.97×10− 7 were obtained, respectively. With these values being less than 10− 6, it was determined that there would be no significant risk due to inhalation of PCDD/Fs in the area.

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Seasonal Change of Gas/Particle Partitioning of Atmospheric Dioxins

Cited by 2 publications

References 13 publications

Atmospheric Deposition of Polychlorinated Dibenzo-p-dioxins (PCDDs) and Polychlorinated Dibenzofurans (PCDFs) in Kanazawa, Japan

Atmospheric Deposition of Polychlorinated Dibenzo-p-dioxins (PCDDs) and Polychlorinated Dibenzofurans (PCDFs) in Kanazawa, Japan

Assessment of Atmospheric Concentrations, Gas/Particle Partitioning, Cancer Risks, Sources, and Atmospheric Transport of PCDD/Fs in a Suburban Area of Bursa, Türkiye

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