Consumer products, Lights, and Environmental Air cleaning in Normal conditions (CLEAN) Home Indoor Field Study Overview
Sofie Schwink, Rileigh Robertson, Ethan Richter, Rebecca Mesburis, Douglas A. Day, Seonsik Yun, Matt Shulman, Andre Schaum, Annamarie Guth, Sean Benjamin, Jose-Luis Jimenez, Joost A. de Gouw, Kelvin Bates, Qing Ye, Michael Hannigan, MARINA VANCE, University of Colorado Boulder
Abstract Number: 424
Working Group: Indoor Aerosols
Abstract
The use of volatile chemical products (VCPs) indoors, such as cleaning products and personal care products, can lead to significant emissions of volatile organic compounds (VOCs) to the indoor environment and the atmosphere. VOCs can react with oxidants to form secondary organic aerosol (SOA) indoors even at very low indoor oxidant concentrations. Some oxidants, like ozone, typically enter the indoor environment from outdoor air, but there are also indoor oxidant sources, like the use of chlorine bleach. During the Consumer products, Lights, and Environmental Air cleaning in Normal conditions (CLEAN) Home Indoor Field Study, we will investigate indoor SOA formation and properties from interactions of common indoor SOA precursors with several oxidants in a real home. This study will take place from May - July 2025 in a single-family home in Boulder, Colorado. For each experiment, two indoor perturbations will be tested in sequence. The initial perturbations include mopping with a cleaning liquid, operating a gas stove, injecting smoke into the house, or house baseline (no perturbation). The second perturbations include ozone injection, wiping surfaces with bleach, wiping with bleach plus turning on a 254 nm germicidal ultraviolet (GUV) lamp, turning on a 222 nm GUV lamp, and turning on a 254 nm GUV lamp. Measurements to be performed during the campaign include particle size distributions, chemical speciation of VOCs and aerosol particles, trace gases, and several low-cost sensor measurements. Observing SOA formation and properties in real-world environments under realistic indoor conditions is important for understanding how using common consumer products can impact indoor and outdoor air quality.