PM10-bound elements in Luanda’s urban atmosphere: concentrations, sources, and their environmental and health impacts

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 125995 - 125995

Published: March 1, 2025

An unprecedented study was carried out in the megacity of Luanda, Angola, involving daily sampling particulate matter (PM10) from June to November 2023. The analysis focused on detection 56 metal(loid)s and complemented by application several contamination health risk indices. PM10 levels ranged 23.6 108 μg/m3, averaging 59.3 exceeding WHO's 24-hour guideline 83% days. In addition crustal elements, most abundant constituents were Zn (159 ng/m3), Ba (43.2 Pb (17.8 Cu (10.5 Sr (7.0 Ni (4.5 Sb (3.7 ng/m3) Cr (3.5 ng/m3). Mineral dust, primarily unpaved roads local soils, accounted for 31 wt.% PM10, while sea salt contributed 6%. Geochemical markers (e.g., Ce-La-V relationships) suggest that vanadium originates predominantly upper crust weathering. Elemental ratios such as Fe/Cu, Cu/Sb, Zn/Sb indicate significant contributions traffic-related emissions brake tyre wear) industrial sources. Sulphur, an important component, likely stems fossil fuel combustion petroleum refining. Luanda experiences severe air pollution, with high inputs Sb, Cd, Zn, other elements linked traffic, emissions, biomass burning. extremely ecological (RI = 4360 ± 2440) highlights critical contamination, driven Cd Nemerow index (1990 1530) underscores urgent public concerns. Non-cancer hazard indices (HI) exceeded safe thresholds children (2.29) adults (2.18), Fe, Mn, Be, Pb, Ni, Co, identified key contributors. Carcinogenic risks inhalation (2.34 × 10-3 1.36 adults) also acceptable levels, emphasising need targeted pollution mitigation strategies.

Language: Английский

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Human health risk assessment model associated with PM2.5 bound metals in paradip port township, India

Chemosphere, Journal Year: 2024, Volume and Issue: 350, P. 141111 - 141111

Published: Jan. 2, 2024

Language: Английский

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Pm10-Bound Elements in Luanda's Urban Atmosphere: Concentrations, Sources, and Their Environmental and Health Impacts

Published: Jan. 1, 2025

An unprecedented study was carried out in the megacity of Luanda, Angola, involving daily sampling particulate matter (PM10) from June to November 2023. The analysis focused on detection 56 metal(loid)s and complemented by application several contamination health risk indices. PM10 levels ranged 23.6 108 µg/m3, averaging 59.3 exceeding WHO's 24-hour guideline 83% days. In addition crustal elements, most abundant constituents were Zn (159 ng/m3), Ba (43.2 Pb (17.8 Cu (10.5 Sr (7.0 Ni (4.5 Sb (3.7 ng/m3) Cr (3.5 ng/m3). Mineral dust, primarily unpaved roads local soils, accounted for 31 wt.% PM10, while sea salt contributed 6%. Geochemical markers (e.g., Ce-La-V relationships) suggest that vanadium originates predominantly upper crust weathering. Elemental ratios such as Fe/Cu, Cu/Sb, Zn/Sb indicate significant contributions traffic-related emissions brake tyre wear) industrial sources. Sulphur, an important component, likely stems fossil fuel combustion petroleum refining. Luanda experiences severe air pollution, with high inputs Sb, Cd, Zn, other elements linked traffic, emissions, biomass burning. extremely ecological (RI = 4363 ± 2439) highlights critical contamination, driven Cd Nemerow index (1985 1526) underscores urgent public concerns. Non-cancer hazard indices (HI) exceeded safe thresholds children (2.3) adults (2.2), Fe, Mn, Be, Pb, Ni, Co, identified key contributors. Carcinogenic risks inhalation also acceptable levels, emphasising need targeted pollution mitigation strategies.

Language: Английский

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Impact assessment of IMO’s sulfur content limits: a case study at latin America’s largest grain port

Air Quality Atmosphere & Health, Journal Year: 2024, Volume and Issue: 17(10), P. 2337 - 2351

Published: April 22, 2024

Language: Английский

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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

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

Published: Oct. 9, 2024

Language: Английский

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