期刊
INHALATION TOXICOLOGY
卷 19, 期 4, 页码 333-342出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/08958370601144241
关键词
-
类别
资金
- NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES [P01ES010594] Funding Source: NIH RePORTER
- NIEHS NIH HHS [P01-ES10594, P01 ES010594, P01 ES010594-06A1] Funding Source: Medline
Showering produces respirable droplets that may serve to deposit pollutants such as trihalomethane decontamination products, heavy metals, inorganic salts, microbes, or cyanoacterial toxins within the respiratory tract. The extent and importance of this route of indoor exposure depend on the physical characteristics of the aerosol as well as the pollutant profile of the source water. The purpose of this study was to characterize shower-generated aerosols as a function of water flow rate, temperature, and bathroom location. Aerosols were generated within a shower stall containing a mannequin to simulate the presence of a human. Using hot water, the mass median diameter (MMD) of the droplets inside the shower and in the bathroom were 6.3-7.5 um and 5.2-6 mu m, respectively. Size was independent of water flow rate. The particle concentration inside the shower ranged from 5 to 14 mg/m(3). Aerosols generated using cold water were smaller (2.5-3.1 mu m) and concentrations were lower (0.02-0.1 mg/m(3)) inside the shower stall. No aerosols were detected in the bathroom area when cold water was used. The International Commission on Radiological Protection model was used to estimate water deposition in the respiratory tract. For hot water, total deposition ranged from 11 to 14 mg, depending on water flow rate, with approximately 50% of this deposited in the extrathoracic region during assumed mouth breathing, and greater than 86% when nose breathing was assumed. Alveolar deposition was 6-10% and 0.9% assuming oral and nasal breathing, respectively. The consequences deposition of shower water droplets will depend on the nature and extent of any pollutants in the source water.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据