2022年南京市大气PM2.5中多环芳烃污染特征及健康风险
Pollution characteristics and health risk of polycyclic aromatic hydrocarbons in atmospheric PM2.5 of Nanjing,China,2022
韦丽 1孙凤霞 1张艺 1许珊珊 1唐彦钊 1贾云飞 1熊丽林1
作者信息
- 1. 南京市疾病预防控制中心环境卫生科,南京 210003
- 折叠
摘要
目的 了解南京市大气细颗粒物(PM2.5)中多环芳烃(polycyclic aromatic hydrocarbons,PAHs)污染特征,评估其健康风险.方法 于2022年每月10-16日分别在江北新区和江宁区2个监测点开展PM2.5和PAHs采样,分别采用称重法和高效液相色谱法测定PM2.5和PAHs含量,利用健康风险评价模型评价PAHs的致癌风险.结果 不同季节PM2.5、PAHs和B[a]P的浓度存在差异(P＜0.01),其中PM2.5 PAHs浓度均是冬、春季高于夏、秋季,B[a]P浓度春季高于夏、秋季.两个监测点PAHs、B[a]P年均浓度、春季、夏季浓度的比较,差异均具有统计学意义(P＜0.05),且江北新区均高于江宁区.两个监测点含量最高的多环芳烃是5环、其次是4环和6环.两个监测点3环、4环、5环、6环PAHs年均浓度均不同(P均＜0.05),江北新区高于江宁区.PAHs年浓度中位数值对两个监测点人群的终生超额致癌风险均大于1.0×10-6.PAHs年浓度95分位数对人群的年龄段超额致癌风险除江宁区0～2岁年龄段人群外,对其他年龄段人群的超额致癌风险均大于1x10-6.结论 南京市两个监测点大气PM2.5中PAHs分布存在季节和地区差异,具有潜在的超额致癌风险.
Abstract
Objective To investigate the pollution characteristics and health risk of polycyclic aromatic hydrocarbons(PAHs)in fine particulate matter(PM2.5)of Nanjing,China.Methods PM2.5 and PAHs samples were collected at two monitoring sites in Jiang-bei new district and Jiangning district from the 10th to 16th days of each month in 2022.The weighing method and high-performance liquid chromatography were used to measure the concentrations of PM2.5 and PAHs,and a health risk assessment model was used to e-valuate the carcinogenic risk of PAHs.Results There were significant differences in the concentrations of PM2.5,PAHs,and B[a]P across different seasons(P＜0.01);the concentrations of PM2.5 and PAHs in winter and spring were higher than those in summer and autumn,and the concentration of B[a]P in spring was higher than that in summer and autumn.There were significant differences be-tween the two monitoring sites in the mean annual concentrations of PAHs and B[a]P and their concentrations in spring and summer(P＜0.05),and Jiangbei new district showed higher concentrations than Jiangning District.In both monitoring sites,5-ring PAHs showed the highest concentration,followed by 4-ring PAHs and 6-ring PAHs.There were significant differences in the mean annual concentrations of 3-,4-,5-,and 6-ring PAHs between the two monitoring sites(P＜0.05),and Jiangbei new district showed higher concentrations than Jiangning District.The median annual concentration of PAHs had an excess cancer risk(ECR)of＞1.0×10-6 for the populations in the two monitoring sites.The 95th percentile of the annual concentration of PAHs showed an ECR of＞1×10-6 for all age groups except the population aged 0-2 years.Conclusion The distribution of PAHs in PM2.5 of Nanjing shows marked seasonal and regional variations,with a potential excess carcinogenic risk.
关键词
细颗粒物(PM2.5)/多环芳烃(PAHs)/污染特征/健康风险评估Key words
fine particulate matter(PM2.5)/polycyclic aromatic hydrocarbons(PAHs)/pollution characteristics/health risk as-sessment引用本文复制引用
基金项目
南京市卫生科技发展项目(ZKX20046)
出版年
2024
NETL
NSTL
万方数据