南京市某居民区空气PM<sub>2.5</sub>和PM<sub>10</sub>污染分布特征分析-东南大学学报医学版

南京市某居民区空气PM_2.5和PM₁₀污染分布特征分析

单位：1. 东南大学公共卫生学院,江苏南京 210009;
2. 江苏省疾病预防控制中心,江苏南京 210009

分类号：R122.1

出版年·卷·期（页码）：2014·33·第二期（128-132）

摘要：

目的：研究南京市某居民区空气PM_2.5和PM₁₀污染的分布特征。方法：于春、夏、秋、冬四季选取同一地点两个不同垂直高度，同步监测PM_2.5和PM₁₀两种颗粒物，其中PM₁₀只于春、夏季采集。结果：南京某居民区PM₁₀质量浓度较低，均未超过我国环境空气质量二级标准（GB3095-2012），秋冬季PM_2.5超标，尤其是冬季最为严重。随着高度的增加，春季PM_2.5质量浓度逐渐升高，而冬季PM_2.5质量浓度则呈现下降的趋势，春冬季节不同高度PM_2.5质量浓度差异有统计学意义（P<0.05），而且工作日PM_2.5质量浓度高于休息日。结论：冬季居民区空气PM_2.5污染严重，尤其是在呼吸带高度，同时PM_2.5在PM₁₀中占很高的比例，建议南京市要采取相关措施以降低PM_2.5污染程度。

Objective: To study the distribution characteristics of PM_2.5 and PM₁₀ pollution in a residential area of Nanjing. Methods: Two different vertical heights of same place were selected, and simultaneously the PM_2.5 sample were collected in spring, summer, autumn and winter, while the PM₁₀ was only collected in spring and summer for some reason. Results: The concentrations of PM₁₀ were below the standard, while the concentrations of PM_2.5 in autumn and winter exceeded, especially in winter, which was the most serious. With the height increased, the concentration of PM_2.5 in spring increased gradually, it showed a downward trend in winter. At different heights, the difference of PM_2.5 in spring and winter was statistically significant (P<0.05), and the concentration of PM_2.5 in weekday was higher than those in weekends. Conclusion: The air pollution of PM_2.5 in winter is serious, especially in the breathing zone height. PM_2.5 accounts for a high proportion in PM₁₀. It is recommended to Nanjing to take measures to reduce the pollution levels of PM_2.5.

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