| 华北地区冬季和夏季大气甲醛污染特征分析 |
| |
| 引用本文： | 姜加龙,曾立民,王文杰,陈仕意,李歆.华北地区冬季和夏季大气甲醛污染特征分析[J].环境科学学报,2019,39(6):1895-1901. |
| |
| 作者姓名： | 姜加龙 曾立民 王文杰 陈仕意 李歆 |
| |
| 作者单位： | 1. 北京大学环境科学与工程学院, 环境模拟与污染控制国家重点联合实验室, 北京 100871;2. 北京雪迪龙科技股份有限公司, 北京 102206,1. 北京大学环境科学与工程学院, 环境模拟与污染控制国家重点联合实验室, 北京 100871;2. 江苏省大气环境与装备技术协同创新中心, 南京 210044,北京大学环境科学与工程学院, 环境模拟与污染控制国家重点联合实验室, 北京 100871,北京大学环境科学与工程学院, 环境模拟与污染控制国家重点联合实验室, 北京 100871,北京大学环境科学与工程学院, 环境模拟与污染控制国家重点联合实验室, 北京 100871 |
| |
| 基金项目： | 大气重污染成因与治理攻关项目（No.DQGG0102）；国家科技支撑计划项目（No.2014BAC21B01） |
| |
| 摘 要： | 为探究华北地区大气甲醛的污染特征,应用自主设计的一套大气甲醛在线分析仪,于2017年冬季和2018年夏季在山东省德州市开展大气甲醛综合观测实验.结果表明,德州站冬季和夏季大气甲醛小时浓度范围分别为0.15×10~(-9)～9.89×10~(-9)和0.43×10~(-9)～10.42×10~(-9),平均值分别为(3.04±1.70)×10~(-9)和(4.32±2.06)×10~(-9),结合日变化特征可知,白天甲醛、过氧乙酰基硝酸酯(PAN)和臭氧(O_3)具有较好的一致性,表明光化学生成是甲醛的主要来源;冬季夜间检测出的高浓度甲醛则表明一次排放也具有重要的贡献.此外,大气甲醛的浓度变化受相对湿度、光照、风速和湿沉降影响较大,并且湿沉降是大气甲醛去除的重要途径.
|
| 关 键 词： | 甲醛 华北地区 光化学 湿沉降 |
| 收稿时间： | 2018/11/12 0:00:00 |
| 修稿时间： | 2019/1/26 0:00:00 |
Characteristics of atmospheric formaldehyde pollution in winter and summer in North China |
| |
| JIANG Jialong,ZENG Limin,WANG Wenjie,CHEN Shiyi and LI Xin.Characteristics of atmospheric formaldehyde pollution in winter and summer in North China[J].Acta Scientiae Circumstantiae,2019,39(6):1895-1901. |
| |
| Authors: | JIANG Jialong ZENG Limin WANG Wenjie CHEN Shiyi and LI Xin |
| |
| Institution: | 1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871;2. Beijing SDL Technology Co., Ltd., Beijing 102206,1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871;2. Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing 210044,State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871,State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871 and State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871 |
| |
| Abstract: | To analyze the variability of atmospheric formaldehyde in North China, an online formaldehyde analyzer was used in two field campaigns in winter 2017 and summer 2018 at Dezhou, Shandong Province. The hourly mixing ratios of formaldehyde range from 0.15×10-9 to 9.89×10-9 in wintertime and 0.43×10-9~10.42×10-9 in summertime. The average mixing ratios are (3.04±1.70)×10-9 and (4.32±2.06)×10-9 during winter and summer, respectively. Agreement in trends of formaldehyde, ozone and PAN in daytime indicates that photochemical production is the major source of formaldehyde; during nighttime in winter, elevated level of formaldehyde is observed, indicating the contribution from local primary emissions. The diurnal variation pattern of formaldehyde is also affected by relative humidity, radiation, wind speed and wet deposition, among which wet deposition is found to be the major sink of formaldehyde during the observation. |
| |
| Keywords: | formaldehyde North China photochemistry wet deposition |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《环境科学学报》浏览原始摘要信息 |
| 点击此处可从《环境科学学报》下载免费的PDF全文 |
|
