青岛海岸大气中氨和有机胺的特征、来源及气粒分配研究  

Characteristics Sources and Gas-Particle Partitioning of Ammonia and Amines in the Atmosphere of Qingdao Coast

作　　者：任晓萱 姚小红[1,2] 孟赫 Ren Xiaoxuan;Yao Xiaohong;Meng He(The Key Laboratory of Marine Environmental Science and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China;Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China;Environmental Monitoring Center for Qingdao, Qingdao 266003, China)

机构地区：[1]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100 [2]青岛海洋科学与技术试点国家实验室海洋生态与环境科学功能实验室,山东青岛266237 [3]山东省青岛生态环境监测中心,山东青岛266003

出　　处：《中国海洋大学学报（自然科学版）》2022年第5期19-31,共13页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41776086)资助

摘　　要：本研究聚焦2019年8—10月、11—12月在青岛近海岸地区在线离子色谱观测数据,并以8—10月Denuder采样器同步测定的气态和颗粒态氨和有机胺为辅助,分析了氨和有机胺的浓度变化、气体来源以及气粒分配。结果显示,观测期间氨气和气态有机胺分别受海洋源和陆地源的影响。在8—10月观测时段,来自陆地源的氨和有机胺浓度水平要明显高于海洋源。NH_(3)和DMA_(gas)通常在每天的6:00—8:00、10:00—12:00出现较高值。NH^(+)_(4)、DMAH^(+)、NO^(-)_(3)通常在每天的3:00—6:00出现较高值。在11—12月观测时段,来自陆地源的浓度水平与海洋源相当,在此基础上,利用E-AIM-Ⅱ热力学平衡模型研究了氨和有机胺的气粒分配,模拟结果显示:在8—10月观测期间,气粒分配浓度与相对湿度具有一定的关系,而11—12月并非如此。In recent years, frequent PM_(2.5) pollution events have become a great challenge for urban air quality management in China. As an important precursor of PM_(2.5), the emissions of SO_(2) and NO_(x) have been greatly reduced, so the attention to ammonia and amines has gradually increased. It is very important to study the variation characteristics of ammonia and amines in the atmosphere and the partitioning of gas-particle for further understanding the formation of secondary aerosols in PM_(2.5). This study focused on the on-line ion chromatography observation data in Qingdao coastal area from August to October and November to December in 2019, and analyzed the concentration changes and gas-particle partitioning of ammonia and amines with the assistance of the simultaneous determination of gaseous and particulate ammonia and amines by Denuder samplers from August to October. The results show that ammonia and gaseous amines are affected by ocean and land sources respectively. From August to October, the concentrations of ammonia and amines from land source were significantly higher than those from ocean source. NH_(3) and DMA_(gas) usually have higher values at 600—800 and 1000—1200 every day. NH^(+)_(4), DMAH^(+), NO^(-)_(3) usually appear high value in 300—600 every day. During the observation period from November to December, the concentration level from land source is similar to that from ocean source. On this basis, the E-AIM-Ⅱ thermodynamic equilibrium model is used to study the gas-particle partitioning of ammonia and amines. The simulation results show that there is a certain relationship between the gas-particle partitioning concentration and relative humidity from August to October, but not from November to December.

关 键 词：氨 有机胺 蜂窝状溶蚀器(Denuder) PM_(2.5) 气粒分配 

分 类 号：P402[天文地球—大气物理学与大气环境]