Levels and Water Soluble Organic Carbon of Atmospheric Nanoparticles in a Location of Ha Noi, Viet Nam

Thủy, Nguyễn Thị Thu; Nghiem, Trung-Dung; Sekiguchi, Kazuhiko; Yamaguchi, Ryosuke; Ly, Bich-Thuy; Hiền, Nguyễn Thị

doi:10.15625/2525-2518/55/6/9618

Cited by 5 publications

(5 citation statements)

References 23 publications

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“…From this analysis, WSOC mean concentration is 2.73 ± 2.17 (range of 0.63-9.12) µg/m 3 . This result is higher compared to a previous study in Hanoi, Vietnam that reported the concentration of WSOC in atmospheric nanoparticles as 1.51 (0.90-2.11) µg/m 3 and 0.41 (0.51-1.83) µg/m 3 in the rainy and dry seasons, respectively [51]. Thuy et al [51] and Le et al [68] clearly identified the rainy and dry seasons in Vietnam over the periods of January-August and October-December, respectively.…”

Section: Wsoccontrasting

confidence: 79%

“…Then, all the blank and sample solutions were analyzed using Total Organic Carbon Analyzer (TOC-L, Shimadzu, Japan) to determine WSOC concentrations. This methodology was adopted from Thuy et al [51].…”

Section: Analysis Of Water-soluble Organic Carbon (Wsoc)mentioning

confidence: 99%

“…Out of 13 measured PAHs, dibenzo(a, h)anthracene (B[h]A) was predominant with a mean concentration of 1.20 ng/m 3 , followed by indeno(1,2,3-cd)pyrene (I[c]P), benzo [51] perylene (B[g]P), benzo(a)pyrene (B[a]P), benzo(a)anthracene (B[a]A), benzo(k)fluoranthene (B[k]F), acenaphthene (Ace), and benzo(b) fluoranthene (B[b]F) with mean concentrations of 0.95, 0.72, 0.41, 0.39, 0.38, 0.33, and 0.30 ng/m 3 , respectively, as shown in Table 2. for background and peatland fire in Riau, Sumatra, Indonesia were 23.9 ± 2.53 µg/m 3 and 7120 ± 3620 µg/m 3 as reported by Fujii et al [46].…”

Section: Variation Of Pahsmentioning

confidence: 99%

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Ambient Levels, Emission Sources and Health Effect of PM2.5-Bound Carbonaceous Particles and Polycyclic Aromatic Hydrocarbons in the City of Kuala Lumpur, Malaysia

et al. 2021

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With increasing interest in understanding the contribution of secondary organic aerosol (SOA) to particulate air pollution in urban areas, an exploratory study was carried out to determine levels of carbonaceous aerosols and polycyclic aromatic hydrocarbons (PAHs) in the city of Kuala Lumpur, Malaysia. PM2.5 samples were collected using a high-volume sampler for 24 h in several areas in Kuala Lumpur during the north-easterly monsoon from January to March 2019. Samples were analyzed for water-soluble organic carbon (WSOC), organic carbon (OC), and elemental carbon (EC). Secondary organic carbon (SOC) in PM2.5 was estimated. Particle-bound PAHs were analyzed using gas chromatography-flame ionization detector (GC-FID). Average concentrations of WSOC, OC, and EC were 2.73 ± 2.17 (range of 0.63–9.12) µg/m3, 6.88 ± 4.94 (3.12–24.1) µg/m3, and 3.68 ± 1.58 (1.33–6.82) µg/m3, respectively, with estimated average SOC of 2.33 µg/m3, contributing 34% to total OC. The dominance of char-EC over soot-EC suggests that PM2.5 is influenced by biomass and coal combustion sources. The average of total PAHs was 1.74 ± 2.68 ng/m3. Source identification methods revealed natural gas and biomass burning, and urban traffic combustion as dominant sources of PAHs in Kuala Lumpur. A deterministic health risk assessment of PAHs was conducted for several age groups, including infant, toddler, children, adolescent, and adult. Carcinogenic and non-carcinogenic risk of PAH species were well below the acceptable levels recommended by the USEPA. Backward trajectory analysis revealed north-east air mass brought pollutants to the studied areas, suggesting the north-easterly monsoon as a major contributor to increased air pollution in Kuala Lumpur. Further work is needed using long-term monitoring data to understand the origin of PAHs contributing to SOA formation and to apply source-risk apportionment to better elucidate the potential risk factors posed by the various sources in urban areas in Kuala Lumpur.

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Section: Wsoccontrasting

confidence: 79%

Section: Analysis Of Water-soluble Organic Carbon (Wsoc)mentioning

confidence: 99%

Section: Variation Of Pahsmentioning

confidence: 99%

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Ambient Levels, Emission Sources and Health Effect of PM2.5-Bound Carbonaceous Particles and Polycyclic Aromatic Hydrocarbons in the City of Kuala Lumpur, Malaysia

et al. 2021

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“…This is because in this analysis, we only detected the concentration of organic carbon that was dissolved in water whereas in OC analysis, all the organic carbon in the filter samples was detected. This result was higher compared to previous study in Hanoi, Vietnam, that reported the concentration of WSOC in atmospheric nanoparticles were 1.51 (0.90-2.11) µg/m 3 and 0.41 (0.51-1.83) µg/m 3 in rainy season and dry season respectively(Thuy et al, 2017). Another study indicated higher concentration of WSOC in PM2.5 compared to Kuala Lumpur[56].…”

contrasting

confidence: 66%

Influence of North-Easterly Monsoon on Carbonaceous Particles and Polycyclic Aromatic Hydrocarbons in PM2.5 in the City of Kuala Lumpur, Malaysia

Suradi¹,

Khan²,

Sairi³

et al. 2021

Preprint

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With increasing interest in understanding contribution of secondary organic aerosol (SOA) to particulate air pollution in urban areas, an exploratory study was carried out to determine levels of carbonaceous aerosols and polycyclic aromatic hydrocarbons (PAHs) in the City of Kuala Lumpur, Malaysia. PM2.5 samples were collected using a high-volume sampler for 24 h in several areas in Kuala Lumpur during the north-easterly monsoon from January to March 2019. Samples were analysed for water soluble organic carbon (WSOC), organic carbon (OC), elemental carbon (EC) and secondary organic carbon (SOC) in PM2.5 was estimated. Particle-bound PAHs were analysed using gas chromatography-flame ionization detector (GC-FID). Average concentrations of WSOC, OC and EC were 2.7 ± 2.2 (range of 0.63-9.1) µg/m3, 6.9 ± 4.9 (3.1-24.1) µg/m3 and 3.7 ± 1.6 (1.3-6.8) µg/m3, respectively, with estimated average SOC of 2.3 µg/m3, contributing 34% to total OC. The average of total PAHs was 1.8 ± 2.7 ng/m3. Source identification methods revealed natural gas and biomass burning, and urban traffic combustion as dominant sources of PAHs in Kuala Lumpur. To understand human health risk posed by PAHs, a deterministic screening health risk assessment was also conducted for several age groups including infant, toddler, children, adolescent and adult. The total concentration of BaPeq is 3.8 ng/m3, with the average of 0.29 (range of 0.001-1.6) ng/m3. Carcinogenic and non-carcinogenic risk of PAH species were well below the acceptable levels recommended by the USEPA. Future work is needed using long-term monitoring data to understand the origin of PAH contributing to SOA formation and to apply source-risk apportionment to know better the potential risk factors posed by the various sources in urban areas in Kuala Lumpur.

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“…The result of the factor analysis (F) showed that 40 K and 232 Th affected the radiological hazard indices by 86.79% (F1), while 226 Ra affected 10.68% (F2) (Table 5). Thuy (1984), the time of spring tide equaled the time of neap tide in the northern area, while spring tide is shorter in the southern area. Radionuclides from rivers are transported to the sea through water and TSS.…”

Section: Sediment Groups and Their In Uencesmentioning

confidence: 86%

Radioactivity concentration and risk indices in intertidal sediments of the Red River Delta, Vietnam

Van Vuong,

Hai,

Van Chien

et al. 2024

Environ Earth Sci

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The radioactivity concentration in eleven intertidal sediment cores in the Red River Delta was determined 40 K, 232 Th, and 226 Ra as well as radiological hazard indices for environmental risk assessment.The radioactivity concentrations of 40 K, 232 Th, and 226 Ra were 656 Bq/kg, 49.8 Bq/kg, and 37.0 Bq/kg, respectively. The radium equivalent activity (Raeq) was 158.7 Bq/kg; the absorbed dose rate (ADR) was 74.5 nGy/h; the annual effective dose equivalent (AEDE) was 0.09 mSv/y; the representative gamma index (Iγr) was 1.18; the activity utilization index (AUI) was 1.0; the external hazard index (Hex) was 0.40; the annual gonadal dose equivalent (AGDE) was 496.4 µSv/y. Two sediment groups were split. Group 1 with lower the radioactivity concentrations than Group 2, 40 K and 232 Th were above the global average while 226 Ra was below, Iγr and AGDE were above UNSCEAR's recommended levels. Group 2 radioactivity concentrations of 40 K, 226 Ra, and 232 Th were higher than global average; radiological hazard indices were higher than Group 1; the AUI, Iγr, and AGDE indices were above UNSCEAR's recommended level.The radioactivity concentrations of 40 K, 232 Th, and 226 Ra were above global average. The AUI, Iγr and AGDE indices were above UNSCEAR's recommended levels. It is recommended that coastal sediments should not be used for construction purposes as this can affect organisms in intertidal areas.

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Levels and Water Soluble Organic Carbon of Atmospheric Nanoparticles in a Location of Ha Noi, Viet Nam

Cited by 5 publications

References 23 publications

Ambient Levels, Emission Sources and Health Effect of PM2.5-Bound Carbonaceous Particles and Polycyclic Aromatic Hydrocarbons in the City of Kuala Lumpur, Malaysia

Ambient Levels, Emission Sources and Health Effect of PM2.5-Bound Carbonaceous Particles and Polycyclic Aromatic Hydrocarbons in the City of Kuala Lumpur, Malaysia

Influence of North-Easterly Monsoon on Carbonaceous Particles and Polycyclic Aromatic Hydrocarbons in PM2.5 in the City of Kuala Lumpur, Malaysia

Radioactivity concentration and risk indices in intertidal sediments of the Red River Delta, Vietnam

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