Exposure to airborne particulate matter during commuting using portable sensors: Effects of transport modes in a French metropolis study case

Journal of Environmental Management, Год журнала: 2024, Номер 365, С. 121400 - 121400

Опубликована: Июнь 26, 2024

Outdoor exposure to particulate matter (PM2.5 and PM10) in urban areas can vary considerably depending on the mode of transport. This study aims quantify this difference during daily travel, by carrying out a micro-sensor measurement campaign. The pollutant was assessed simultaneously over predefined routes order allow comparison between different transport modes having same starting ending points. During six-week campaign, average reference values for PM background concentrations were 13.72 17.92μg/m3 PM2.5 PM10, respectively. results revealed that with highest adjusted concentration (PM2.5Norm) bus (1.65) followed metro (1.51), walking (1.33), tramway (1.31), car (1.09) finally bike (1.06). For PM10Norm, had (1.86), (1.68), (1.65), (1.61), (1.43) (1.39). level urbanization around route presence preferential lanes public transportation influenced which commuters exposed. active (bike walking), we observed frequent variations trip, characterized punctual peaks concentration, local characteristics road traffic morphology. Fluctuations inside vehicles partly explained opening closing doors stops, as well passenger flows, influencing re-suspension particles. one least exposed overall, lowest variability, although these greatly ventilation parameters used. These encourage measures move most users away from traffic, developing network entirely dedicated cycling walking, particularly densely populated areas, encouraging renewal motorized use less polluting fuels efficient systems.

Язык: Английский

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A Field Survey on Indoor Climate in Land Transport Cabins of Buses and Trains

Atmosphere, Год журнала: 2024, Номер 15(5), С. 589 - 589

Опубликована: Май 13, 2024

Assessing indoor environmental quality (IEQ) is fundamental to ensuring health, well-being, and safety. A particular type of compartment, land transport cabins (LTCs), specifically those trains buses, was surveyed. The global rise in commute in-cabin exposure time gives relevance the current study. This study discusses climate (IC) LTCs emphasize risk well-being comfort exposed occupants linked poor IEQ, using objective assessment a communication method following recommendations CEN-EN16798-1 standard. measurement campaign carried out on 36 trips real-time travel 15 buses 21 trains, mainly EU region. Although measured operative temperature, relative humidity, CO2, VOC levels followed EN16798-1 requirements most cabins, compliance gaps were found these as per ventilation requirements. Also, PMV-PPD index evaluated two velocity ranges 0.1 0.3 m/s showed that 39% 56% respectively, thermally inadequate. parameters air (IAQ) defective 83% studied LTCs. Therefore, exist concerning IC LTCs, suggesting potential risks need for improved with IEQ criteria EN16798-1.

Язык: Английский

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Development of Cellulose Air Filters for Capturing Fine and Ultrafine Particles through the Valorization of Banana Cultivation Biomass Waste

Environments, Год журнала: 2024, Номер 11(3), С. 50 - 50

Опубликована: Март 7, 2024

Outdoor and indoor atmospheric pollution is one of the major problems that humanity continues to face. As a mitigation pathway, numerous technologies have been developed for air purification, including use fibrous filters. In this study, particle capture efficiencies pressure drops filters manufactured with cellulose pulp extracted from banana pseudostems were studied across three size ranges (PM10, PM2.5, PM1). Two pretreatments applied, alkaline soda-antraquinone (alkali-treated pulp) subsequent bleaching process (bleached pulp), four manufacturing processes tested: crushing, freeze-drying, vacuum filtration, pressing. addition, study varying filter grammage (70, 100, 160 g·m−2) pressing pressures (2, 4, 6, 8 t) was also performed. After conducting these tests, bleached pulp, having g·m−2 pressed at 4 t, deemed optimal individual solution. It demonstrated high retention all (with values exceeding 80%), moderate drop below 1000 Pa, thermal stability (degradation above 220 °C). However, combining freeze-drying two-ton yielded improved results (83% smallest particles 89% others) approximately half drop. Based on results, stands as noteworthy contribution waste valorization advancement environmentally friendly materials This achieved through adoption simple cost-effective technology, coupled utilization 100% natural agricultural primary material.

Язык: Английский

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Refining Children's Exposure Assessment to NO2, SO2, and O3: Incorporating Indoor-to-Outdoor Concentration Ratios and Individual Daily Routine

Chemosphere, Год журнала: 2024, Номер 364, С. 143155 - 143155

Опубликована: Авг. 23, 2024

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Exposure Assessment of Particulate Matter Concentrations in Urban-Transit Buses in Ghana

Опубликована: Янв. 1, 2025

Язык: Английский

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Predicting real-time within-vehicle air pollution exposure with mass-balance and machine learning approaches using on-road and air quality data

Atmospheric Environment, Год журнала: 2023, Номер 318, С. 120233 - 120233

Опубликована: Ноя. 27, 2023

Язык: Английский

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Effects of the Emissions of Vehicles Ahead on In‐Car Exposure to Traffic‐Related Air Pollutants: A Multiple Statistical Analysis Approach

Indoor Air, Год журнала: 2024, Номер 2024(1)

Опубликована: Янв. 1, 2024

Traffic‐related air pollutants inside vehicle cabins are often extremely high compared to background pollution concentrations. The study of the determinants these concentrations is particularly important for professional drivers and commuters who spend long periods in vehicles. This aimed at identifying quantifying effect several exposure on carbon monoxide (CO), equivalent black (eBC), two particulate matter (PM) fractions (PM 0.3–1 PM 1–2.5 ), ultrafine particle (UFP) a passenger car cabin. novelty this work consists examining effects emissions first ahead (henceforth called “leading vehicle”) pollutant cabin following (i.e., that was equipped with monitoring devices), particular emphasis role leading characteristics (e.g., emission reduction technologies). real‐time instrumentation placed petrol car, which driven by same operator times per day route real driving conditions. in‐cabin ventilation settings were set as follows: windows closed, conditioning recirculation modes off, fanned system on. measurements conducted over total 10 weekdays during different seasons summer autumn). A video camera fixed windscreen used retrieve information about traffic conditions through careful analysis. associations among their potential evaluated using generalized estimating equation univariate multiple models. results confirmed significant impact well‐known such seasonality, microclimatic parameters, jam situations, characteristics. Moreover, outcomes shed light key determinant factors cabins. Indeed, tested conditions, it demonstrated significantly higher vehicles (from +14.6% +67.5%) empty road even though introduction newer technologies better helped mitigate effect. Additionally, diesel‐fuelled petrol‐fuelled impactful CO (−7.2%) eBC (+45.3%) An (+30.4%) in‐vehicle found heavy‐duty light‐duty Finally, research pointed out road‐scale more than local meteorological

Язык: Английский

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Experimental and density functional theory calculation study on the NO2 adsorption and reduction by KOH activated biochar

Applied Surface Science, Год журнала: 2024, Номер unknown, С. 161670 - 161670

Опубликована: Ноя. 1, 2024

Язык: Английский

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Exposure to Airborne Particulate Matter During Commuting Using Portable Sensors: Effects of Transport Modes in a French Metropolis Study Case

Опубликована: Янв. 1, 2024

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Язык: Английский

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In-cabin particulate matter exposure of heavy earth moving machinery operators in Indian opencast coal mine

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Май 21, 2024

As a part of their occupation, the operators heavy earth moving machineries (HEMM) working in opencast mines are exposed to several air pollutants, prominent one being airborne particulate matter. The paper presents findings from study that was aimed at investigating matter exposure (HEMM’s) highly mechanized mines. HEMMs included dumper, shovel and drill. mean in-cabin PM₁₀ concentrations dumper shovel, which had an air-conditioning system cabin, were range 600–650 µg m^{− 3}. Operators inside drill cabin did not have conditioning systems as high 1992 3 However, cabins effective preventing up 20% by comparison persons open mine atmosphere. main haul road contributed ~ 50% higher than internal roads. Coarse particles (PM₁₀) retained upper respiratory tracts while fines (PM_2.5 PM₁) travel via tracheobronchial region reach alveolar region. Occupational HEMM different pollutants is present very limited therefore more studies need be conducted.

Язык: Английский

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