Particulate matter (PM) in ambient air is associated with many adverse health outcomes. Although many anthropogenic activities are associated with PM release in indoor settings, dispersion and persistence of PM is poorly understood. In this study, concentration, persistence and dispersion of PM_2.5 and PM₁₀ released following aerosol antiperspirant use were measured in a bathroom environment under several door and window ventilation conditions, and in a nearby bedroom.

Daily mean concentrations were elevated in all experimental conditions compared to the control, but varied depending on the ventilation condition. The daily mean concentrations exceeded the WHO daily mean guideline values when there was little or insufficient ventilation in the bathroom, whereas ventilation through opening doors or windows prevents exceedances. After spraying, mean peak PM concentrations were lowest in the bathroom when the door and window were left open.

Introducing ventilation through opening the bathroom door and/or window reduced PM concentrations by > 93% 10 minutes after spray release, compared to reductions of 60% and 77% for PM2.5 and PM10, respectively, with no ventilation. Opening the bathroom window significantly increased peak PM concentration in the bedroom relative to leaving the window closed, suggesting increased dispersion of PM from bathroom to bedroom.

环境空气中的颗粒物（PM）与许多不良健康后果相关。尽管许多人为活动与室内环境中的PM释放有关，但对PM的分散和持久性了解甚少。在这项研究中，在几个门窗通风条件下的浴室环境中以及附近的卧室中，测量了使用气溶胶止汗剂后释放的PM _2.5和PM _10的浓度，持久性和分散性。

与对照组相比，所有实验条件下的日平均浓度均升高，但随通风条件的变化而变化。当浴室的通风很少或不足时，每日平均浓度超过了WHO的每日平均指导值，而通过打开的门或窗户进行的通风可以防止超标。喷雾后，当门和窗户保持打开状态时，浴室中PM的平均峰值浓度最低。

通过打开浴室门和/或窗户引入通风，使喷雾释放后10分钟内PM浓度降低了93％以上，而没有通风的PM2.5和PM10分别降低了60％和77％。相对于关闭窗户，打开浴室窗户会显着增加卧室中PM的峰值浓度，这表明PM从浴室到卧室的分散度增加。