武安市PM_(2.5)及其二次水溶性无机离子污染特征和区域来源解析  

Contaminated Character and Regional Source of PM_(2.5) and Secondary Water-soluble Inorganic Ions in Wu’an City

作　　者：姚诗音 韩力慧[1] 郭改仲 程水源[1] 王传达 YAO Shiyin;HAN Lihui;GUO Gaizhong;CHENG Shuiyuan;WANG Chuanda(Beijing Key Laboratory of Regional Air Pollution Control,Beijing University of Technology,Beijing 100124,China;Wu'an Air Quality Assurance Emergency Command Center,Wu'an 056300,Hebei,China)

机构地区：[1]北京工业大学区域大气复合污染防治北京市重点实验室,北京100124 [2]武安市空气质量保障应急指挥中心,河北武安056300

出　　处：《北京工业大学学报》2021年第6期644-654,共11页Journal of Beijing University of Technology

基　　金：国家重点研发计划资助项目(2018YFC0213206);北京市科技计划资助项目(Z181100005418017)。

摘　　要：武安市是以钢铁立市的典型重工业城市.为研究武安市PM2.5的污染特征和区域来源解析,对武安非采暖期(2018年10月)和采暖期(2019年1月)进行大气PM2.5样品的采集和组分测试,并利用CAMx-PSAT模型模拟结果分析区域源排放对武安PM2.5及其二次水溶性无机离子(SO42-、NO-3、NH+4)的质量浓度贡献.测试结果表明,武安PM2.5污染严重,平均质量浓度为113.5μg/m3,采暖期PM2.5污染水平高于非采暖期;SO42-、NO-3和NH+4的平均质量浓度占PM2.5总质量浓度的41.1%,是PM2.5重要组成部分;SO42-、NO-3和NH+4质量浓度表现为采暖期高于非采暖期;NO-3与SO42-质量浓度比值在采暖期和非采暖期均小于1,表明燃煤烟尘等固定源贡献相对较大;随着PM2.5污染等级的升高,SO42-、NO-3和NH+4质量浓度明显增大,达到重污染天时,SO42-、NO-3和NH+4质量浓度增至最高.模拟结果显示,武安城区PM2.5污染是由本地污染源排放和外来污染物区域传输共同作用的结果,本地污染源排放占主导地位;冶金源排放对PM2.5、NO-3和SO42-质量浓度贡献影响最大;农业源排放是NH+4质量浓度的主要污染来源;采暖期的居民源排放对PM2.5和SO42-、NO-3、NH+4质量浓度贡献率相比于非采暖期出现大幅度增加.外来工业源和机动车源对武安PM2.5质量浓度贡献较为突出.Wu’an is a heavy industrial city based on steel industry. To study the change characteristics and regional source of PM2.5 pollution in Wu’an city, it is necessary to collect the air environmental samples and test PM2.5 components during non-heating period(October 2018) and heating period(January 2019). The simulation results of the CAMx-PSAT model were applied to analyze the regional source apportionment of PM2.5 and secondary water-soluble inorganic ions(SO42-, NO-3, and NH+4) in Wu’an city. The test results show that Wu’an was seriously polluted by PM2.5, and the average mass concentration of PM2.5 during the sampling period was 113.5 μg/m3. The contamination of PM2.5 during heating period was higher than that during non-heating period. SO42-, NO-3, and NH+4 were critical components of PM2.5, and the average mass concentrations of them accounted for 41.1% of PM2.5 concentration. The concentrations of SO42-, NO-3, and NH+4 during heating period were higher than that during non-heating period. Additionally, the average ration of NO-3/SO42- was less than 1 during heating period and non-heating period, indicating that the stationary source was relatively important compared to other sources. The concentrations of SO42-, NO-3, and NH+4 obviously increased with the increasing of PM2.5 pollution degree, and the mass concentrations of SO42-, NO-3, and NH+4 increased to the highest level in heavy pollution days. Simulation results show that formation of PM2.5 pollution is the result of local pollutant emission and non-local pollutant emission transport. The local pollutant emission dominates the PM2.5 pollution. Metallurgical source have the greatest impact on PM2.5, NO-3 and SO42- concentrations in Wu’an. Agricultural source is the major source of pollution for NH+4 concentration. Compared with non-heating period, the contribution of residential source to PM2.5 concentration and secondary water-soluble inorganic ions concentration significantly increases in heating period. Industrial source and vehicle sourc

关 键 词：武安市 重工业城市 PM_(2.5) 二次水溶性无机离子 CAMx-PSAT模型 区域来源解析 

分 类 号：X513[环境科学与工程—环境工程]