摘要PM2.5是一种常见但一直被忽视的细颗粒物，它是导致城市能见度下降的祸首，同时是城市大气污染物中损害人体健康的元凶。本文介绍了PM2.5的定义，成因，分布及危害。给出了WHO及包括我国在内的几国对PM2.5的要求。目的是为了了解大学的PM2.5浓度。63819

本文使用PM2.5切割器采集，用重量法检测PM2.5的浓度。探究了天气和PM2.5浓度之间的关系。我们监测的PM2.5数据和南京市发布的PM2.5浓度趋势大致相同，但学校监测数据有时会略高。最后探究了空气湿度和温度对PM2.5浓度的影响。

一般来说，PM2.5的浓度大体随空气湿度的增加而降低，随温度的增加而升高。TSP趋势相同。发现阴雨天气PM2.5浓度会明显降低，晴天又会回到持续高浓度。

毕业论文关键词  PM2.5  危害  质量法  湿度  

毕业设计说明书（论文）外文摘要

Title   Study on the Collection and Concentrations of PM2.5 on NJUST Campus                                                                         

Abstract PM2.5 is a kind of fine particles which is common but has always been neglected，it is the primary who cause the visibility of the city decreasing，furthermore，it’s also the matter to injure people’s health among the air pollutants of the city. This paper introduces the definition, causes, distribution and hazards of PM2.5.The requirements for PM2.5 of WHO and several countries including China are also given in this paper. The studies aimed at understanding the concentration of PM2.5 in NJUST. 

This paper use PM2.5 sampling facility to collect samples and gravimetric method to detection the concentration of PM2.5. The relation between the weather and the concentration of PM2.5 is studied. The data monitored agree nearly with the trend which is demonstrated by the data of Nanjing, though sometimes slightly higher. Lastly the influence of humidity on the concentration of PM2.5 is also studied.

In general, the concentration decreases while the air humidity increases, and it increases while the temperature increases.TSP has the same trend. According to the statistics, the concentration is significantly reduced in rainy days and returns to sustained high values in sunny days.

Keywords  PM2.5  hazard  gravimetric method  humidity   

目次

1. 绪论 1

1.1  PM2.5的概念 1

1.1.1  灰霾 1

1.1.2  PM2.5的定义 2

1.1.3  PM2.5的性质 3

1.1.4  PM2.5的组成 4

1.1.5  PM2.5的形成原因 5

1.2  PM2.5对气候环境与健康的影响 5

1.2.1  对生产生活方面的影响 5

1.2.2  对人体健康的危害 5

1.3  PM2.5的采集与测定方法 6

1.3.1  PM2.5测定标准 7

1.3.2  测定方法 8

1.3.3  采集方法：捕集测定法 8

1.4  本课题的研究内容 11

1.4.1  本课题的研究内容 11