Continuous measurement of reactive oxygen species inside and outside of a residential house during summer
Autor: | Glenn Morrison, Audrey J. Dang, Michael J. Walker, Annalise Pfaff, Brent J. Williams, Azin Eftekhari, Claire F. Fortenberry, Nuran Ercal |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Continuous measurement
Environmental Engineering Ozone 010504 meteorology & atmospheric sciences 010501 environmental sciences 01 natural sciences Article chemistry.chemical_compound Adverse health effect Air Pollution Particle Size 0105 earth and related environmental sciences chemistry.chemical_classification Reactive oxygen species Air Pollutants Ambient air pollution Air exchange Public Health Environmental and Occupational Health Building and Construction Infiltration (HVAC) chemistry Environmental chemistry Air Pollution Indoor Environmental science Particulate Matter Reactive Oxygen Species Environmental Monitoring |
Zdroj: | Indoor Air |
Popis: | Reactive oxygen species (ROS) are an important contributor to adverse health effects associated with ambient air pollution. Despite infiltration of ROS from outdoors, and possible indoor sources (eg, combustion), there are limited data available on indoor ROS. In this study, part of the second phase of Air Composition and Reactivity from Outdoor aNd Indoor Mixing campaign (ACRONIM-2), we constructed and deployed an online, continuous, system to measure extracellular gas- and particle-phase ROS during summer in an unoccupied residence in St. Louis, MO, USA. Over a period of one week, we observed that the non-denuded outdoor ROS (representing particle-phase ROS and some gas-phase ROS) concentration ranged from 1 to 4 nmol/m(3) (as H(2)O(2)). Outdoor concentrations were highest in the afternoon, coincident with peak photochemistry periods. The indoor concentrations of particle-phase ROS were nearly equal to outdoor concentrations, regardless of window-opening status or air exchange rates. The indoor/outdoor ratio of non-denuded ROS (I/O(ROS)) was significantly less than 1 with windows open and even lower with windows closed. Combined, these observations suggest that gas-phase ROS are efficiently removed by interior building surfaces and that there may be an indoor source of particle-phase ROS. |
Databáze: | OpenAIRE |
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