石化企业周边儿童多环芳烃内暴露负荷的时间变异性

The research on the temporal variability of the internal exposure levels of polycyclic aromatic hydrocarbons in children around the petrochemical enterprise

为了研究空气低质量数多环芳烃污染对儿童内暴露负荷的影响,选取华南地区某石化企业为污染区,上风向15km处为对照区,在污染区和对照区各自选取一所小学中的80名儿童为内暴露采样对象,连续采集3d的尿样.研究石化企业多环芳烃污染对儿童内暴露负荷的影响以及多环芳烃内暴露的时间变异性.结果表明:3d中,污染区儿童羟基多环芳烃(OHPAHs)浓度的几何平均值为0.06~5.09μg/g;对照区儿童OHPAHs浓度几何均值为0.04~4.00μg/g.污染区儿童OHPAHs浓度略高于对照区,并且存在显著影响(P<0.05);除对照区2d以外,污染区与对照区儿童尿液中OHPAHs组成特征均表现出羟基萘>羟基菲>羟基芴>羟基芘的规律;OHPAHs之间的相关性分析表明,只有污染区3d的OHPAHs之间存在显著相关(P<0.01,R^2=0.74~0.97),污染区OHPAHs之间的相关性好于对照区;仅在污染区3d的1-羟基芘与其它OHPAHs单体之间均为显著性相关(P<0.01,R^2=0.82~0.95).

In order to study the effect of low molecular weight PAHs air pollution on the internal exposure levels of children,the study selected two groups of children to collect the urine samples in three days.One group（n=80）in polluted area were from an elementary school situated adjacent to a petrochemical enterprises in southern China,and the other group（n=80）in controlled area were from an elementary school situated in unwind area of 15km.The effect of petrochemical enterprises pollution on children internal exposure and the temporal variability of the internal exposure was investigated.The results suggested that：In three days,the geometric mean of the OHPAHs concentrations in children of polluted area were slightly higher than those of controlled area with significant effect（P〈0.05）,which were0.04～4.00μg/g and 0.06～5.09μg/g,respectively.The constituent characteristics of OHPAHs were expressed asΣOHNapΣOHPheΣOHFluΣOHPyr,except for that of polluted area on the second day.Significant correlations were exist between all OHPAHs only on the third day of the polluted area（P〈0.01,R^2=0.74～0.97）and the correlations of OHPAHs in the samples of polluted area were better than those of controlled area.There were significant correlation between1-OHP and other OHPAHs only on the third day of polluted area（P〈0.01,R^2=0.82～0.95）.