[宿迁市大气颗粒物中水溶性无机离子的季节特征及来源分析]

[Seasonal Characteristics and Source Analysis of Water-soluble Inorganic Ions in PM in Suqian City].

作者信息

Ma Hong-Lu, Zhao Xin, Lu Jian-Gang, Wang Hui, Xu Chun-Ling, Ouyang Yan, Zhu Xin-Sheng, Yin Tang-Bing, Qi Dan, Lu Ya-Qiu, Wang Jiu-Yang, Lu Sheng-Xing

机构信息

Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science&Technology, Nanjing 210044, China.

Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China.

出版信息

Huan Jing Ke Xue. 2020 Sep 8;41(9):3899-3907. doi: 10.13227/j.hjkx.201911243.

DOI:10.13227/j.hjkx.201911243

PMID:33124268

Abstract

To study the seasonal pollution characteristics and sources of water-soluble inorganic ions in atmospheric PM in Suqian City, 171 samples were collected at three monitoring points, which were in the water vapor channel, from May 2017 to January 2018. The mass concentrations of PM and nine water-soluble inorganic ions were analyzed. The results showed that the annual average concentration of water-soluble inorganic ions in PM in Suqian City was (44.08±34.61) μg ·m, accounting for 41.8% of PM. The concentrations of these species were in the order of (NO) > (SO) > (NH) > (ρl) > (Na) > (Ca) > (K) > (F) > (Mg); NO, SO, and NH accounted for 75.6% of the total water-soluble ions. The annual average ratio of (NO) to (SO) was 1.53±0.88, indicating that mobile sources contributed more to PM pollution. Based on the correlation analysis of NH and SO, NO may exist in the form of (NH) SO, NHHSO, or NHNO. According to the principal component analysis, secondary transformation, industrial pollution, biomass burning, and dust were the major sources of water-soluble inorganic ions. PMconcentrations were positively related to relative humidity in winter. Water vapor transmission is more likely to promote PM accumulation in winter.

摘要

为研究宿迁市大气颗粒物中水溶性无机离子的季节污染特征及来源，于2017年5月至2018年1月在处于水汽通道的3个监测点采集了171个样品。分析了颗粒物及9种水溶性无机离子的质量浓度。结果表明，宿迁市颗粒物中水溶性无机离子的年均浓度为(44.08±34.61)μg·m，占颗粒物的41.8%。这些物种的浓度顺序为(NO)＞(SO)＞(NH)＞(ρl)＞(Na)＞(Ca)＞(K)＞(F)＞(Mg)；NO、SO和NH占水溶性离子总量的75.6%。(NO)与(SO)的年均比值为1.53±0.88，表明移动源对颗粒物污染的贡献更大。基于NH与SO的相关性分析，NO可能以(NH)SO、NHHSO或NHNO的形式存在。根据主成分分析，二次转化、工业污染、生物质燃烧和扬尘是水溶性无机离子的主要来源。冬季颗粒物浓度与相对湿度呈正相关。水汽传输更有可能促进冬季颗粒物的积累。