基于硫氮转化的PM_(2.5)生成特征初步研究  

Preliminary Study on PM_(2.5)Generation Characteristics Based on the Sulfur and Nitrogen Conversion

作　　者：张信成 郭利利[1] 李荣杰 何秋生[1] 王新明[2] ZHANG Xin-cheng;GUO Li-li;LI Rong-jie;HE Qiu-sheng;WANG Xin-ming(College of Environment and Safety,Taiyuan University of Science and Technology,Taiyuan 030024,China;State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510630,China)

机构地区：[1]太原科技大学环境与安全学院,太原030024 [2]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州510630

出　　处：《太原科技大学学报》2023年第2期172-177,共6页Journal of Taiyuan University of Science and Technology

基　　金：国家自然科学基金(42077201);海外及港澳学者合作研究基金(41728008);山西省研究生优秀创新项目(2017SY076)。

摘　　要：为研究太原盆地相关地区氮硫转化对PM_(2.5)生成的影响,该研究在2019年10月1日至11月9日于太原盆地南段某城市使用颗粒物化学组分监测仪(ACSM)对当地空气质量进行了观测,研究结果表明:采样期PM_(2.5)、SO_(2)、NO_(2)平均浓度分别为76.40μg/m^(3)、40.80μg/m^(3)、56.03μg/m^(3),污染天SO^(2-)_(4)、NO^(-)_(3)和NH^(+)_(4)(统称SNA)在颗粒物中占比显著高于清洁天。随着颗粒物浓度的上升,NO_(2)/SO_(2)呈降低趋势,NO^(-)_(3)/SO^(2-)_(4)呈现出先升后降,说明污染前期NO^(-)_(3)转化占主导地位,而后期SO^(2-)_(4)转化起着重要作用。采样期间较高的湿度和NH^(+)_(4)浓度均有利于二次转化,当湿度大于80%时,硫的转化占主导。该研究可为太原盆地相关城市PM_(2.5)污染防治工作提供参考。In order to study the impact of nitrogen and sulfur conversion on PM_(2.5)generation in related areas of the Taiyuan Basin,a city in the south of the Taiyuan Basin was selected as the sampling point,and the air quality was monitored using the Particulate Chemical Composition Monitor(ACSM)from October 1st to November 9th,2019.The results showed that the concentrations of PM_(2.5),SO_(2) and NO_(2) were 76.40μg/m^(3),40.80μg/m^(3)and 56.03μg/m^(3),respectively.SNA(including SO^(2-)_(4)、NO^(-)_(3) and NH^(+)_(4))in polluted days has a significantly higher proportion of particulate matter than in clean days.With the increase of particulate matter concentration,NO_(2)/SO_(2) decreased gradually,and NO^(-)_(3)/SO^(2-)_(4) ratio increased first and then decreased,which indicated that NO^(-)_(3) transformation was dominant in the early stage of pollution,and SO^(2-)_(4) transformation played an important role in the later stage.High humidity and NH^(+)_(4) concentration were conducive to the secondary conversion.When the humidity was higher than 80%,sulfur conversion was dominant.The conclusions of this study can provide references for PM_(2.5)pollution prevention and control in Taiyuan Basin.

关 键 词：颗粒物化学组分监测仪(ACSM) SNA 硫转化率 氮转化率 

分 类 号：X513[环境科学与工程—环境工程]