PAHs Exposure Assessment for Community Elderly (PEACE) through Personal Particulate Sampling and Urinary Biomonitoring in Tianjin, China

摘要

Elderly expouse levels to polycyclic aromatic hydrocarbons (PAHs) has been analyzed through personal particulate sampling and urinary biomonitoring in summer and winter of 2011 in Tianjin, China. 101 subjects from two adjacent communities were recruited in this present study. Personal particulate samples were collected continuously from the subjects for 24 h, while first morning urine samples of elderly were collected when particulate measurements finished. In personal particulate samples, 18 PAHs were measured, and in urine samples 12 mono-hydroxylated metabolites (OH-PAHs) from 5 parent PAHs (naphthalene, fluorene, phenanthrene, pyrene and chrysene) were analyzed. The exposure levels of elderly population were much higher than other countries, while in winter were even higher than some occupationally exposed population reports, suggesting serious health risks exist in cold season. Comparison of personal particulate sampling and urinary biomonitoring results suggests that inhalation is the major route for NaP exposure, whereas ingestion may be a more important route for 3-ringed or larger PAHs. The correlation between 1-OHP and other metabolites support the use of 1 -OHP as a useful surrogate representing total PAH exposure.