摘要为了解南京市环境中大气颗粒物污染状况，为改善大气环境质量提供依据，针对南京市大气颗粒物的污染水平开展了研究。通过探讨大气颗粒物浓度的分析检测技术，通过滤膜采样，研究了2014年春季南理工大气颗粒物污染特征；同时结合南京市每日气象监测数据，研究了2014年春季南京市大气颗粒物污染水平状况。
通过大气颗粒物测量研究，发现南京市春季大气颗粒物污染严重，大气中PM2.5和TSP的变化趋势一致，TSP浓度变化范围在80µg/m3-200µg/m3，PM2.5浓度变化范围在30µg/m3-120µg/m3，PM10的最大浓度在218.14µg/m3。对采集的九级膜中不同粒径的微粒的形貌特征进行微观解析，研究发现大气中细颗粒物和粗颗粒物表现出不同的结构特征，分别呈链状和团状的微观结构。
通过南京市监察站每日公布的温度、湿度、风级速以及大气颗粒物污浓度的日平均变化谱图，研究发现气象因素对大气颗粒物浓度影响显著。总体而言，大气颗粒物浓度变化范围在70µg/m3-200µg/m3，其中早上和傍晚，气温比较低，湿度比较高，风级数小，地面辐射能力差，颗粒物浓度比较大；而下午2：00前后，气温温度较高，湿度低，风级速大，太阳辐射能力强，颗粒物浓度比较小。21774
毕业论文关键词 大气颗粒物浓度 气象因素 滤膜称重法 PM2.5和TSP
Title Pollution characteristics of atmospheric particulates
of Nanjing in Spring
Abstract
In order to understand the atmospheric particulate matter pollution in Nanjing environment, to improve the quality of atmospheric environment to provide a basis for atmospheric particulate matter pollution levels in Nanjing carried out a study. By exploring atmospheric particulate matter concentrations analytical techniques, sampling through membranes studied atmospheric particulate matter pollution characteristics Nanjing University of Science and Technology the spring of 2014; combined Nanjing Daily meteorological monitoring data to study the spring of 2014, the level of particulate pollution in Nanjing status.
By measuring the atmospheric particulate matter found in Nanjing spring atmospheric particulate matter pollution, atmospheric changes consistent trend of PM2.5 and TSP, TSP concentration range 80µg/m3-200µg/m3, PM2.5 concentration range 30µg/m3-120µg/m3,and the maximum concentration of PM10 in 218.14µg/m3.
On the morphology of the film collection of nine different size particles in micro-analytic study found that atmospheric fine particles and coarse particles exhibit different structural features, namely the microstructure was like a chain and group.
Nanjing published daily by temperature monitoring stations, the average change in humidity, wind speed and atmospheric concentrations of particulate matter pollution spectrum, the study found meteorological factors on atmospheric particulate matter concentrations were significantly. Overall, changes in atmospheric particulate matter concentration in the range of 70µg/m3-200µg/m3, where the morning and evening, the temperature is relatively low, relatively high humidity, wind series of small, poor ground radiation, the relatively large concentration of particles. And around 2:00 pm, the temperature high temperature, low humidity, wind speed large, strong solar radiation, the concentration of particles is relatively small.
Keywords：atmospheric concentrations of particulate matter, meteorological factors, membrane weighing method, PM2.5 and TSP
目 次
1 绪论 1
1．1研究背景 1
1.2大气颗粒物的特征 1 南京春季大气颗粒物污染水平特征研究:http://www.youerw.com/huaxue/lunwen_14129.html