Seasonal variation of atmospheric Pb sources in Singapore - Elemental and lead isotopic compositions of PM10 as source tracer

Ray, Iravati; Das, Reshmi; Chua, Song Lin; Wang, Xianfeng

doi:10.1016/j.chemosphere.2022.136029

Cited by 12 publications

(11 citation statements)

References 39 publications

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“…The Pb isotope ratios of TSP during the non-haze period were 206 Pb/ 207 Pb = 1.159 ± 0.005 (range: 1.150 ∼ 1.166) and 208 Pb/ 207 Pb = 2.438 ± 0.006 (range: 2.430 ∼ 2.451). The values are comparable to previous studies in Singapore, which analyzed the samples during 2011 and 2013 ( 206 Pb/ 207 Pb = 1.147 ± 0.002 and range 1.137–1.159) and 2017–2018 ( 206 Pb/ 207 Pb = 1.149 ± 0.005 and range 1.134–1.161) . The observed values were interpreted by considering the mixing of natural background, historical leaded petrol and present industrial activities. , Additionally, Pb from coal combustion emission in Indonesia is transported by the southwest and inter monsoon winds .…”

Section: Resultssupporting

confidence: 86%

“…The result implies that the sources of Ni and Cu remain dominated by anthropogenic emissions. Previous reports suggest that fossil fuel burning is a major source for Ni and Cu in Singapore’s atmosphere . The EFs for other elements (Th, Mn, Cr, Fe Mg, and V) were lower than 10 during the non-haze period, indicating mostly natural origins.…”

Section: Resultsmentioning

confidence: 79%

“…The observed values were interpreted by considering the mixing of natural background, historical leaded petrol and present industrial activities. , Additionally, Pb from coal combustion emission in Indonesia is transported by the southwest and inter monsoon winds . The isotope ratios of the non-haze TSP samples also overlapped with vehicular and ship emissions, heavy oil combustion, and waste incineration in Singapore …”

Section: Resultsmentioning

confidence: 99%

“…54 The isotope ratios of the non-haze TSP samples also overlapped with vehicular and ship emissions, heavy oil combustion, and waste incineration in Singapore. 54 The Pb isotopic ratios that increased during the haze period are 206 Pb/ 207 Pb = 1.169 ± 0.012 (range: 1.154 ∼ 1.188) and 208 Pb/ 207 Pb = 2.448 ± 0.013 (range: 2.434 ∼ 2.463). The data points fall on a mixing line between the average Pb isotope ratios of peat and plants with that for crustal material.…”

Section: Acs Earth and Spacementioning

confidence: 97%

“…54,55 Additionally, Pb from coal combustion emission in Indonesia is transported by the southwest and inter monsoon winds. 54 The isotope ratios of the non-haze TSP samples also overlapped with vehicular and ship emissions, heavy oil combustion, and waste incineration in Singapore. 54 The Pb isotopic ratios that increased during the haze period are 206 Pb/ 207 Pb = 1.169 ± 0.012 (range: 1.154 ∼ 1.188) and 208 Pb/ 207 Pb = 2.448 ± 0.013 (range: 2.434 ∼ 2.463).…”

Section: Acs Earth and Spacementioning

confidence: 99%

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Suspension of Crustal Materials from Wildfire in Indonesia as Revealed by Pb Isotope Analysis

Das

Wang

Khezri

et al. 2023

ACS Earth Space Chem.

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Southeast Asia experiences recurring wildfire events. Aerosol particles from these wildfires include metal species, which are suggested to have critical influences on the environment and climate. However, the mechanisms for emission of these elements from the wildfires in the region remains unclear. We analyzed both the elemental composition and the isotope ratios of lead (Pb), which is an environmentally important element. Our samples were collected in Singapore as the total suspended particulate (TSP) matter during 2013, especially focusing on the wildfire haze period in June. The Pb isotope ratios for wildfire fuels as well as crustal materials in the region were also analyzed. The Pb isotopic ratios during the haze period ( 208 Pb/ 207 Pb = 2.448 ± 0.013 and 206 Pb/ 207 Pb = 1.169 ± 0.012) were significantly (p < 0.05) different from those of the non-haze period ( 208 Pb/ 207 Pb = 2.438 ± 0.006, 206 Pb/ 207 Pb = 1.159 ± 0.005). This difference demonstrates that the suspension of the crustal material is the dominant emission source of TSP. Comparison of elemental composition (Al/Pb) with previous studies in the region, which have dominantly been sampled as PM 2.5 , suggests that the emission mechanism of particulate matter from wildfire in the region is likely size-dependent. We suggest that the suspension of crustal soil material needs to be included in future emission inventory for wildfire emission.

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Section: Acs Earth and Spacementioning

confidence: 97%

Section: Acs Earth and Spacementioning

confidence: 99%

See 3 more Smart Citations

Suspension of Crustal Materials from Wildfire in Indonesia as Revealed by Pb Isotope Analysis

Das

Wang

Khezri

et al. 2023

ACS Earth Space Chem.

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Source Identification Using Principal Component Analysis and Health Risk Assessment of Heavy Metals Contamination in PM2.5 Near an Industrial Area in Thailand

Simatupang,

Santhaweesuk,

Pongkiatkul

et al. 2024

Expo Health

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Industrialization has led to a surge in air pollution-related problems, as particulate matter (PM) containing heavy metals poses significant health risks. Understanding airborne particle chemistry, particularly the presence of heavy metals, is vital for effective air quality management and health interventions. This study analysed heavy metal levels in PM2.5 across various sites near an industrial zone in Thailand, including areas near main roads, the industrial zone, as well as indoor and outdoor areas of childcare centres. The concentrations of ambient PM2.5 were found to exceed national standards and acceptable limits during the cool dry season, particularly in the industrial zone (46.4 µg/m3), followed by areas near main roads (41.0 µg/m3) and childcare centres (31.6 µg/m3). The impact of the indoor–outdoor relationship on PM2.5 concentration within childcare centres varied. During the cool dry season, Aluminium had the highest concentration, while lead (Pb) across all sites raised environmental concerns. Remarkably, indoor childcare centres showed higher Pb levels than industrial zones and areas near the main road. Principal Component Analysis revealed the distinct factors linked to specific metals, implying contributions from industrial and transportation sources. Lead isotopic analysis indicated potential associations between lead sources and industries like smelting and refining. During the cool dry season, non-carcinogenic risks were concerning (HI > 1), especially near roads and industrial areas. Vulnerabilities were also observed in students and teachers within indoor childcare centres. This study underscores the importance of monitoring and reducing heavy metal pollution in PM2.5, especially in childcare centres near industrial zones, to preserve public health and regional air quality.

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New insights into the sources of atmospheric lead reaching the Arctic by isotopic analysis of PM10 atmospheric particles and resuspended soils

Grotti,

Ardini,

Vecchio

et al. 2024

Atmospheric Environment

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Seasonal variation of atmospheric Pb sources in Singapore - Elemental and lead isotopic compositions of PM10 as source tracer

Cited by 12 publications

References 39 publications

Suspension of Crustal Materials from Wildfire in Indonesia as Revealed by Pb Isotope Analysis

Suspension of Crustal Materials from Wildfire in Indonesia as Revealed by Pb Isotope Analysis

Source Identification Using Principal Component Analysis and Health Risk Assessment of Heavy Metals Contamination in PM2.5 Near an Industrial Area in Thailand

New insights into the sources of atmospheric lead reaching the Arctic by isotopic analysis of PM10 atmospheric particles and resuspended soils

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