Department of Mechanical Engineering, University of Colorado Boulder, 1111 Engineering Drive, 427 UCB, Boulder, Colorado 80309, United States.
Department of Chemistry, Colorado State University, 200 West Lake Street, Fort Collins, Colorado 80523, United States.
Environ Sci Technol. 2020 Jun 16;54(12):7107-7116. doi: 10.1021/acs.est.0c00740. Epub 2020 May 29.
It is important to improve our understanding of exposure to particulate matter (PM) in residences because of associated health risks. The HOMEChem campaign was conducted to investigate indoor chemistry in a manufactured test house during prescribed everyday activities, such as cooking, cleaning, and opening doors and windows. This paper focuses on measured size distributions of PM (0.001-20 μm), along with estimated exposures and respiratory-tract deposition. Number concentrations were highest for sub-10 nm particles during cooking using a propane-fueled stovetop. During some cooking activities, calculated PM mass concentrations (assuming a density of 1 g cm) exceeded 250 μg m, and exposure during the postcooking decay phase exceeded that of the cooking period itself. The modeled PM respiratory deposition for an adult residing in the test house kitchen for 12 h varied from 7 μg on a day with no indoor activities to 68 μg during a simulated day (including breakfast, lunch, and dinner preparation interspersed by cleaning activities) and rose to 149 μg during a simulated Thanksgiving day.
由于与健康风险相关，因此了解居住环境中颗粒物（PM）的暴露情况非常重要。HOMEChem 运动旨在研究制造的测试房屋在日常活动（如烹饪、清洁和开门窗）期间的室内化学情况。本文重点介绍 PM（0.001-20μm）的实测粒径分布，以及估计的暴露量和呼吸道沉积量。使用丙烷燃料炉灶烹饪时，亚 10nm 颗粒的数量浓度最高。在某些烹饪活动中，计算出的 PM 质量浓度（假设密度为 1gcm）超过 250μg/m，且烹饪后衰减阶段的暴露量超过烹饪期本身。在测试房屋厨房中居住 12 小时的成年人的 PM 呼吸沉积量从无室内活动的一天的 7μg 变化到模拟日（包括早餐、午餐和晚餐准备，穿插清洁活动）的 68μg，在模拟感恩节当天上升至 149μg。
