摘要
目的了解镇江市大气细颗粒物(fine particulate matter,PM_(2.5))中的多环芳烃(polycyclic aromatic hydrocarbons,PAHs)的污染水平,评估其经吸入途径对人群的健康风险。方法选择镇江市丹徒区为监测点,于2017—2021年每月10—16日采集大气PM_(2.5)样品并测定其中16种PAHs单体的含量,依据《化学物质环境健康风险评估技术指南》(WS/T 777-2021)进行健康风险评估。结果2017—2021年镇江市大气PM_(2.5)中16种PAHs单体总浓度年均值为5.52 ng/m^(3),范围在(4.61~8.11)ng/m^(3)之间,呈现冬季>春季>秋季>夏季的特点。PAHs构成均以5~6环为主,主要来源为机动车尾气和燃煤。以等效浓度中位数计算,2017—2021年大气PM_(2.5)中PAHs的危害商(hazard quotient,HQ)均小于1,致癌风险(carcinogenic risk,CR)值均小于1×10^(-6);以等效浓度第95百分位数浓度计算,2017—2021年镇江市大气PM_(2.5)中PAHs的HQ值在1.22~3.27之间,春季、秋季、冬季HQ在1.21~2.91之间,夏季HQ为0.46;2017年CR值为1.68×10^(-6),2018—2021年CR值在6.27×10^(-7)~9.64×10^(-7)之间,春季、夏季、秋季CR值在2.34×10^(-7)~6.68×10^(-7)之间,冬季CR值为1.49×10^(-6)。结论镇江市大气PM_(2.5)中PAHs在较高浓度下仍有潜在的致癌风险和较高的非致癌风险。
Objective To investigate the pollution levels of polycyclic aromatic hydrocarbons(PAHs)in ambient fine particulate matter in Zhenjiang,Jiangsu province,China,and to evaluate the health risk of respiratory exposure to PAHs.Methods Ambient fine particulate matter samples were collected at the monitoring point of Dantu district in Zhenjiang during 10th to 16th of every month from 2017 to 2021 to analyze the contents of 16 types of PAHs,followed by health risk evaluation according to the Technical Guide for Envi-ronmental Health Risk Assessment of Chemical Exposure(WS/T 777-2021).Results The average annual concentration of the 16 types of PAHs was 5.52 ng/m^(3),ranging from 4.61 to 8.11 ng/m^(3).The concentrations of PAHs were generally highest in winter,followed by spring,autumn,and summer.PAHs were mainly composed of 5-6 rings,mainly from vehicle exhaust emissions and coal combus-tion.Based on the median toxic equivalent concentration,the hazard quotient(HQ)values of PAHs in ambient fine particulate matter from 2017 to 2021 were all less than 1,and the carcinogenic risk(CR)estimates were all less than 1×10^(-6).Based on the 95th per-centile of toxic equivalent concentration,the HQ values of PAHs in ambient fine particulate matter ranged from 1.22 and 3.27 in Zhen-jiang from 2017 to 2021.The HQ values were between 1.21 and 2.91 in spring,autumn,and winter,and 0.46 in summer.The CR estimate was 1.68×10^(-6)in 2017 and 6.27×10^(-7)to 9.64×10^(-7)from 2018 to 2021.The CR estimates were between 2.34×10^(-7)and 6.68×10^(-7)in spring,summer,and autumn,and 1.49×10^(-6)in winter.Conclusion PAHs in ambient fine particulate matter in Zhen-jiang have potential carcinogenic and higher non-carcinogenic risks at high concentrations.
作者
陈宇
吴军
宋寅生
施泉清
CHEN Yu;WU Jun;SONG Yin-sheng;SHI Quan-qing(Zhenjiang Center for Disease Control and Prevention,Zhenjiang 212000,China;Dantu District Center for Disease Control and Prevention)
出处
《环境卫生学杂志》
2023年第7期530-536,共7页
JOURNAL OF ENVIRONMENTAL HYGIENE
基金
镇江市青年科技人才托举工程。
关键词
细颗粒物
多环芳烃
健康风险评估
fine particulate matter(PM_(2.5))
polycyclic aromatic hydrocarbons(PAHs)
health risk assessment
