National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, USA.
Environ Monit Assess. 2013 Jan;185(1):1011-23. doi: 10.1007/s10661-012-2610-4. Epub 2012 May 8.
Personal exposure monitoring for select polycyclic aromatic hydrocarbons (PAHs) was performed as part of the National Human Exposure Assessment Survey (NHEXAS) Pilot Study in Baltimore, MD and in four surrounding counties (NHEXAS-Maryland). An objective of this effort was to establish environmental exposure estimates for non-scripted subpopulations involved in their normal activities. Participants, children, and adults (ages 13-84) were randomly selected from urban, suburban, and rural areas near Baltimore. Twenty-four hour PM(10) sample collections (~5.8 m(3)) were performed using personal environmental monitors. Monitoring was performed for 47 households and 6 sampling Cycles during 1995-1996. A total of 233 personal air samples were available from the participants with eight PAHs speciated (e.g., chrysene, benzo(a)pyrene) as well as an aggregate grouping (total carcinogenic PAHs). Results indicate that ~50% of the selected samples had detectable concentrations for 3 to 5 of the individual PAHs depending upon spatial setting. Noted differences were observed between exposure concentrations from individuals living in rural areas as compared to urban/suburban environments. Mean benzo(a)pyrene concentrations were observed to be 0.10 ng/m(3) across the entire sampling population. This represented a value well below the World Health Organization's 1.0 ng/m(3) ambient air guideline for this PAH.
作为巴尔的摩国家人类暴露评估调查（NHEXAS）试点研究的一部分，对选定的多环芳烃（PAHs）进行了个人暴露监测，该研究还在马里兰州的四个周边县（NHEXAS-Maryland）进行。这一工作的目的是为参与正常活动的非脚本亚人群建立环境暴露估计。参与者为巴尔的摩附近城市、郊区和农村地区的儿童和成年人（13-84 岁）。使用个人环境监测器进行了 24 小时 PM（10）样品采集（约 5.8m³）。监测在 1995-1996 年间对 47 户家庭和 6 个采样周期进行。共有 233 名参与者的个人空气样本可供使用，其中有 8 种 PAHs 被指定（例如，苊、苯并[a]芘）以及一个总致癌 PAHs 分组。结果表明，根据空间设置，约 50%的选定样本中有 3 到 5 种个体 PAHs 的可检测浓度。与城市/郊区环境相比，生活在农村地区的个体的暴露浓度存在明显差异。在整个采样人群中，苯并[a]芘的平均浓度为 0.10ng/m³。这一值远低于世界卫生组织针对这种 PAH 提出的 1.0ng/m³的环境空气指导值。
