Evaluating Indoor Air Quality in Residential Environments: A Study of PM2.5 and CO2 Dynamics Using Low-Cost Sensors

Environments, Год журнала: 2024, Номер 11(11), С. 237 - 237

Опубликована: Окт. 28, 2024

Indoor air quality (IAQ) poses a significant public health concern, and exposures to high levels of fine particulate matter (PM2.5) carbon dioxide (CO2) could have detrimental impacts. This study focused on assessing the indoor pollutants in residential house located town Mission, Hidalgo County, South Texas, USA. The PM2.5 CO2 were monitored indoors: kitchen bedroom. investigation also aimed elucidate effects household activities such as cooking human occupancy these pollutants. Low-cost sensors (LCSs) from TSI AirAssure™ used this study. They deployed within breathing zone at approximately 1.5 m above ground. Calibration low-cost against Federal Equivalent Method (FEM) instruments was undertaken using multiple linear regression method (MLR) model improve data accuracy. significantly influenced by activities, with peak concentrations reaching up 118.45 μg/m3. bedroom increased during occupant’s sleeping period, 1149.73 ppm. risk assessment assessed through toxicity potential (TP) calculations for concentrations. TP values 0.21 0.20 obtained bedroom, respectively. below hazard threshold (i.e., < 1). These low be attributed use electric stoves efficient ventilation systems. research highlights effectiveness continuous IAQ monitoring helps promote better awareness necessary interventions salubrious microenvironments.

Язык: Английский

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Fabrication of novel rosin-based antibacterial nanofibers for particulate matter removal

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

In this study, sustainable, biodegradable and eco-friendly filters were prepared via electrospinning technique to obtain fibrous membranes for the filtration of particulate matter (PM_2.5 and PM₁₀) bacteria removal. For purpose, natural rosin (R), modified (MR, pentaerythritol ester rosin) selected, due antibacterial properties polylactic acid (PLA) was used as a bio-based plasticizing agent facilitate fibers formation from samples. Effects process parameters such concentration solution, ratio polymers, spinning volume membranes, voltage flow rate, on fiber studied through Scanning Electron Microscope (SEM) analysis. Under optimum condition, 40% rosin/PLA selected fabrication further The filtering efficiency assessed in real-scale room by measuring penetration neutralized aerosol particles (2% NaCl) electrospun filters. capacity with 97.00% PM_2.5 97.9% PM₁₀. On other hand, 10% PLA, fabricated control sample, demonstrated 99.00% PM_{2.5 99.2% Moreover, analysis results revealed that PLA-based showed no activity against Staphylococcus aureus, Escherichia coli, Bacillus cereus, Staphylococcus epidermidis. However, inhibited these formed inhibition zones 9.50±0.50, 8.50±0.50, 9.83±1.04, effectively preventing bacterial growth. summary, although MR/PLA is slightly lower compared those their strong activities highlight promising potential pine resin-based rosin, sustainable polymer developing advanced air filtration.}

Язык: Английский

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Understanding particulate matter emissions from cooking meals, health impacts and policy path in Ecuador

The Science of The Total Environment, Год журнала: 2025, Номер 982, С. 179628 - 179628

Опубликована: Май 15, 2025

Cooking is a major source of indoor air pollution, but little known about its emissions or health impacts in Ecuadorian households. This study quantified PM₂.₅ and PM₁₀ from six common menus (three fried, three stewed) cooked real-life kitchen Guayaquil lacking natural mechanical ventilation. Each menu was replicated 30 times, yielding 180 PM concentration profiles. After quality control, 120 profiles were retained for analysis. Median 24 h concentrations 16 μg/m3 21 μg/m3, respectively-exceeding WHO 24-hour guidelines % PM₂.₅. Using Disability-Adjusted Life Years (DALYs), the harm exposure estimated at 990 DALYs per 100,000 person-years analyzed cooking scenarios. These levels indicate quantifiable chronic risks despite being lower than other Low Middle Income Countries studies. Findings support need guidelines, ventilation strategies, public policies tailored to urban Latin American

Язык: Английский

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Multi-scenario PM2.5 distribution and dynamic exposure assessment of university community residents: Development and application of intelligent health risk management system integrated low-cost sensors

Environment International, Год журнала: 2024, Номер 185, С. 108539 - 108539

Опубликована: Март 1, 2024

Exposure scenario and receptor behavior significantly affect PM2.5 exposure quantity of persons resident groups, which in turn influenced indoor or outdoor air quality & health management. An Internet Things (IoT) system, EnvironMax+, was developed to accurately conveniently assess residential dynamic state. A university community "QC", as the application area, divided into four scenarios five groups residents. Low-cost mobile sensors indoor/outdoor pollution migration (IOP) models jointly estimated multi-scenario real-time concentrations. Questionnaire used investigate residents' activity characteristics. Mobile (app) "Air management (AHM)" could automatic collect trajectory. At last, daily concentrations each residents-group were obtained. The results showed that most important one, where residents spend about 60 % their time. Closing window significant affecting contamination. annual average concentration studied scenarios: (RS) < public (PS) (OS) catering (CS). Except for CS, other higher than by 5–10 μg/m3. population weighted 37.1 μg/m3, 78 concentration. 5 groups: cooks > workers students elderly, related time proportion different scenario.

Язык: Английский

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Selection and evaluation of commercial low-cost devices for indoor air quality monitoring in schools

Journal of Building Engineering, Год журнала: 2024, Номер unknown, С. 110952 - 110952

Опубликована: Окт. 1, 2024

Язык: Английский

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Impact of Cooking Methods on Indoor Air Quality: A Comparative Study of Particulate Matter (PM) and Volatile Organic Compound (VOC) Emissions

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

Опубликована: Янв. 1, 2024

Cooking activities are responsible for substantial emissions of both particulate matter (PM) and volatile organic compounds (VOCs), two key indoor air pollutants, which can lead to numerous adverse health effects, including premature mortality. Chicken breast was prepared following tightly constrained cooking procedures with contrasting methods in a well‐controlled research kitchen investigate the PM VOC by simultaneous measurements reference instruments (an optical aerosol spectrometer measuring light scattering single particles continuous monitoring proton‐transfer‐reaction time‐of‐flight mass [PTR‐ToF‐MS] VOCs). Peak concentrations 2.5 ranked order (median [ μ g m −3 ]) pan‐frying (92.9), stir‐frying (26.7), deep‐frying (7.7), boiling (0.7), air‐frying (0.6). VOCs [ppb]) (260), (230), (110), (30), (20). Key from different frying were identified detailed principal component analysis (PCA), aldehydes, ketones, furans, aromatic hydrocarbons, alkenes, pyrazines, alkanes. The temperature found be factor that positively correlated emission strength, while oil weight negatively levels. We also determined rates (varying over wide range, e.g., 0.1 2931 min −1 ) exposures (ranging, approximately 2 more than 1000 min). In addition, using EPR spectroscopy, we measured environmentally persistent free radicals (EPFRs) formed heating processes at levels 10 9 spins mass. These EPFR shown unaffected ozone exposure.

Язык: Английский

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The impact of automated control of indoor air pollutants on cardiopulmonary health, environmental comfort, sleep quality in a simulated apartment: A crossover experiment protocol

Frontiers in Built Environment, Год журнала: 2023, Номер 9

Опубликована: Фев. 8, 2023

Air pollution makes an impact on cardio-pulmonary health. Since people spend over 90% of their time indoors, exposures to the indoor environment make most significant Among sources, cooking emits particles that disperse through residential and expose occupants. We use fully controlled simulated modules conduct exposure experiments. In pilot study, participants stayed in for 1 week, main 14 will stay module 4 weeks. One is operated as a classical US house air supply recommendation. The second has advanced control system that, alongside standard supply, activates quality interventions: stove hood, portable cleaners, bathroom exhaust flush (increasing ∼3 times) function PM 2.5 levels space. Environmental sensors based Internet Things technology simultaneously monitored Particulate Matter (PM ), CO 2 , Total Volatile Organic Compounds Relative Humidity temperature all spaces interventions. Participant’s scheduled activities include morning evening tasks, Monday Friday. Participants may leave during day. They be asked cook breakfast dinner using lab-provided recipes. measured each participant’s blood pressure, heart rate, rate variability. Blood urine samples were collected 3 times per participant week study. Up 20 ml minimum 30 sampled collection. Analysis was performed 8-hydroxy-2-deoxyguanosine (8-OHdG, urine), von Willebrand Factor (vWF, plasma), high sensitivity C-Reactive Protein (hsCRP, serum), Interleukin-6 (blood CD11b (blood), Fibrinogen Myeloperoxidase serum). conducted Pilot weeks with test study protocol data adjusted results. Results showed proposed could completed, methodology adopted this provide valuable insights into relationship between occupants' Trial registration: Mayo Clinic IRB 20-007908.

Язык: Английский

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Influence of Human Activities and Occupancy on the Emission of Indoor Particles from Respiratory and Nonrespiratory Sources

ACS ES&T Air, Год журнала: 2024, Номер 1(5), С. 386 - 396

Опубликована: Март 26, 2024

In this study, we examined the relationship between human activities and emission characteristics of CO2 particles in three indoor settings: a clean environmental chamber, café, musical club. We determined particle rates (CER PER) across various (sitting, reading, exercise) both masked (N-95) unmasked scenarios, as well scenarios involving normal clean-room clothing (CRC) chamber. Masking reduced PER only during exercise (∼11%), indicating that respiratory sources constitute tiny fraction total emissions passive (e.g., sitting reading). contrast, wearing CRC by over 55% for all activities, demonstrating skin-shedding dominant from humans. Results café club measurements showed number concentrations were mostly driven occupancy. Collectively, results controlled lab field environments demonstrate nonrespiratory skin-shedding) humans outnumber an environment, emphasizing need to better quantify contribution evaluate potential role airborne transmission infectious diseases.

Язык: Английский

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A novel approach for large-scale characterization of residential cooking-generated PM with computer vision and low-cost sensors

The Science of The Total Environment, Год журнала: 2024, Номер 951, С. 175621 - 175621

Опубликована: Авг. 18, 2024

Язык: Английский

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A study of quantifying the influence of kitchen human activity on indoor air quality dynamics

Environmental Pollution, Год журнала: 2024, Номер 362, С. 124900 - 124900

Опубликована: Сен. 10, 2024

Язык: Английский

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