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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Long-Term (2003–2019) Air Quality, Climate Variables, and Human Health Consequences in Dhaka, Bangladesh

Frontiers in Sustainable Cities, Journal Year: 2021, Volume and Issue: 3

Published: July 19, 2021

Long-term trends in air quality by studying the criteria pollutants (PM 2.5 , PM 10 CO, O 3 NO 2 and SO ) climate variables (temperature, surface pressure, relative humidity) were depicted this study. The 17-year (2003–2019) average values of 88.69 ± 9.76 μg/m 124.57 12.75 0.69 0.06 ppm, 51.42 1.82 ppb, 14.87 2.45 8.76 2.07 respectively. among ambient increasingly significant ( p < 0.05) except for with slopes 1.83 0.15 /year, 2.35 0.24 0.01 0.002 ppm/year, 0.47 0.03 ppb/year, 0.40 0.02 ppb/year Pearson correlations revealed a association while noteworthy correlation was observed between temperature. Principal component analysis (PCA) positive matrix factorization (PMF) have been employed collectively to examine main sources pollutants. PCA similar PMs as well being equally distributed variables. PMF receptor modeling resulted attributing four factors inferred from signified vehicular emissions, road/soil dust, biomass burning, industrial emissions. hazard quotient (HQ) not antagonistic (HQ 1) acute exposure levels three age groups (infants, children, adults) showing health risk > chronic infants children. Children are identified worst sufferers groups, which points low breathing high traffic pollution Dhaka, Bangladesh.

Language: Английский

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Association of short-term PM2.5 exposure with airway innate immune response, microbiota and metabolism alterations in human airways

Environmental Pollution, Journal Year: 2024, Volume and Issue: 345, P. 123435 - 123435

Published: Jan. 29, 2024

Language: Английский

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Modeling Urban-Rural health disparities using a Taxi-Based mobile atmospheric monitoring system

Transportation Research Part D Transport and Environment, Journal Year: 2024, Volume and Issue: 129, P. 104152 - 104152

Published: March 8, 2024

Language: Английский

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Particulate matter exposure and non-cancerous inhalation health risk assessment of major dumpsites of Owerri metropolis, Nigeria

Environmental Analysis Health and Toxicology, Journal Year: 2021, Volume and Issue: 36(4), P. e2021025 - e2021025

Published: Nov. 19, 2021

Numerous particulates are released from the dumpsites in Owerri metropolis and later dispersed to other areas environment where they cause adverse health challenges inhabitants. To analyze PM concentration, field measurements were carried out at seven major Metropolis. Estimates of possible risks as result exposure airborne particulate matter (PM2.5, PM10, etc.) performed using US Environmental Protection Agency human risk assessment framework. A scenario approach which normal worst-case adopted for acute chronic periods infants, children, adults. The concentrations 2.5 ranged 122.30-501.76 μg/m3 exceeded WHO 24hr annual mean maximum limit. Nigerian National Ambient Air Quality Standard allowable limit PM10 was by most dumpsites. Hazard quotient > 1 nearly all is likely challenges. results showed that under monthly conditions, both PM2.5 concentration levels have potential effects when adults on or bases. Actions should be taken regulate such raise public awareness inhabitants affected areas. In conclusion, regular monitoring therefore needed decrease ambient (PM) study area.

Language: Английский

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Health risk assessment of particulate matter 2.5 in an academic metallurgy workshop

Indoor Air, Journal Year: 2022, Volume and Issue: 32(9)

Published: Sept. 1, 2022

Exposure to indoor PM2.5 is associated with allergies, eye and skin irritation, lung cancer, cardiopulmonary diseases. To control protect the health of occupants, exposure studies are necessary. In this study, released in an academic metallurgy workshop was assessed a risk assessment conducted for male female students technicians. Polycarbonate membrane filters active pump operating at flow rate 2.5 L/min were used collect from Monday Friday 3 months (August-October 2020) 08:00-16:00. mass concentrations obtained gravimetrically, Multiple-Path Particle Dosimetry model predict deposition, retention, clearance respiratory tract system. The developing carcinogenic non-carcinogenic effects among technicians determined. average concentration August 32.6 μg/m3 32.8 September, 32.2 October. head region accounted highest deposition fraction (49.02%), followed by pulmonary (35.75%) tracheobronchial regions (15.26%). Approximately 0.55 mg still retained alveolar 7 days after exposure. HQ <1 while that >1, suggesting compared students. results showed (>1 × 10-5 ); however, there no excess cancer (<1 10-6 ). This study highlights importance micro-environments such as workshops which often less researched, underestimated. also indicated need implement measures occupants ensure rules adhered to.

Language: Английский

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Investigating the Disproportionate Impacts of Air Pollution on Vulnerable Populations in South Africa: A Systematic Review

Atmosphere, Journal Year: 2025, Volume and Issue: 16(1), P. 49 - 49

Published: Jan. 6, 2025

Background: Knowledge of how different social groups in South Africa are affected by air quality is important for informing regulations and determining the integrated social–environmental approach to adopt. This systematic review evaluates impact pollution on these groups, investigates socio-economic factors that increase exposure, assesses mitigation measures. Methods: The followed PRISMA guidelines analyzed quantitative studies conducted Africa, which were published between 2014 2024. studies’ sources included databases such as Google Scholar, PubMed, Scopus. Data from 47 eligible using descriptive statistics. Results: Results show women, children, low-income communities tend bear brunt poor quality. Children most quality, with significant respiratory issues. Pregnant women vulnerable adverse birth outcomes. results indicate reviewed, 51% focused effects whilst fewer (26%) women. may point a gap research specific impacts Low-income face increased exposure due proximity pollutant substandard housing. further indicated health experienced populations, general issues (96%) (89%) prominent impacts. Conclusions: study underscores need stricter regulations, public education, an mitigate populations.

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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Particulate matter exposure in major manufacturing industrial zones of Nigeria: non-carcinogenic human health risk assessments, spatiotemporal analysis and dispersion modeling

Case Studies in Chemical and Environmental Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 101151 - 101151

Published: Feb. 1, 2025

Language: Английский

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Comprehensive Health Risk Assessment of Trace Metals in PM 2.5 : An Urban Perspective

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Air pollution is one of the most significant problems faced by all countries, including Malaysia. Traffic emissions are a contributor to air pollutant emissions, particularly in urban areas, which can have adverse health impacts on vulnerable populations. The study conducted at Jalan Raja Muda Abdul Aziz, Kuala Lumpur, was determine concentration selected trace metals and their risks humans through inhalation exposure during Southwest Monsoon (SW) Transition (IM). study's results showed that PM2.5 higher SW monsoon compared IM, 19.95 µg/m³ 13.13 µg/m³, respectively. ∑ ELCR trend for varies age group, with adults having highest levels, followed children, toddlers, infants. In addition, Cr adult group had CR values IM readings 9.21 × 10^{− 7} 7.67 7, lung assessment 60-year-old men amount PM_2.5-bound metal inhalation. Multiple-Path Dosimetry Model (MPPD) revealed head region (46%) deposition amount, pulmonary (45%) tracheobronchial regions (9%). Deposition lobar area left lower (LL) (35%) lowest right middle (RM) (7%). mass (D_m) (1.53 x 5 µg) infant (9.00 6 µg). However, per unit (D_ma) indicates toddler (0.0467 µg/m²) has value than (0.0116 µg/m²).In conclusion, bound- PM_2.5 potential effects surrounding community.

Language: Английский

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