南京市主要大气污染物健康风险评价

Health risk assessment of major air pollutants in Nanjing

通过收集分析南京市2017年到2021各年内的SO 2及NO 2的日均浓度,并采用美国环保署推荐的非致癌物健康风险评价模型对两种大气污染物进行健康风险评价,研究结果表明:(1)南京市2017年到2021年SO 2与NO 2的人群健康风险值均低于国际社会推荐的最大可接受水平,且呈现逐年下降趋势;(2)SO 2与NO 2两种大气污染物对儿童健康风险的影响要大于对老年人的影响,且对人群健康风险影响存在一定的性别差异;(3)男性人群的健康风险值随着年龄增长呈现一定波动起伏,而女性健康风险的影响随着年龄增长逐渐下降;(4)NO 2对人群健康风险的影响在冬季最高,夏季最低,而SO 2对人群健康风险影响在四季内变化较小,总体上春季最高,夏季最低。此项研究成果为南京市大气污染暴露水平提供了一定参考,对今后评判不同环境介质中污染物及不同暴露方式的人群健康风险评价进而推动南京市大气污染防治攻坚战具有重要意义。

By collecting and analyzing the daily average concentrations of SO 2 and NO 2 in Nanjing from 2017 to 2021,and using the non-carcinogen health risk assessment model recommended by the US Environmental Protection Agency to assess the health risk of the two air pollutants,the research results show that:(1)The population health risk index of SO 2and NO 2in Nanjing from 2017 to 2021 are lower than the maximum acceptable level recommended by the international community,and show a downward trend year by year.(2)The health risks of SO 2 and NO 2 on children are greater than those of the elderly,and there are gender differences in the health risks of the population.(3)For SO 2 and NO 2,the health risk values of male population fluctuated with age,while the health risk values of female population decreased with age.(4)The health risk of NO 2 is the highest in winter and the lowest in summer.However,the SO 2 health risk of the population changed little in the four seasons,generally the highest in spring and the lowest in summer.The results of this research provide a certain reference for the exposure level of air pollution in Nanjing,and are of great significance for evaluating the health risk assessment of pollutants in different environmental media and different exposure channels in the future,so as to promote the battle against air pollution in Nanjing.