王伟,田晓,崔阳,郭利利,何秋生,王新明

• 1:太原科技大学环境科学与工程学院
• 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

摘要(Abstract)：

本研究于2020年夏季(8月1日-31日)和冬季(12月1日-31日)使用气溶胶化学组分分析仪(ACSM)在太原盆地典型煤焦化工区介休开展PM_(2.5)中主要化学组分(包括SO_4~(2-)、NO_3~-、NH_4~+、Cl~-和有机物)的在线观测。结果表明:在冬季受供暖的影响，煤炭消耗量增加，SO_2、NO_2和CO等污染物的排放量高于夏季;夏季和冬季PM_(2.5)的浓度分别为(45.66±31.31)μg/m~3和(57.74±53.79)μg/m~3，其中无机气溶胶(SO_4~(2-)、NO_3~-、NH_4~+)占PM_(2.5)的68.89%和62.41%．无机气溶胶的浓度随PM_(2.5)浓度增大而升高。SO_4~(2-)的形成在夏季主要表现为光化学反应，在冬季主要表现为液相反应;NO_3~-的形成在夏季表现为光化学反应和液相反应，在冬季主要是液相反应;结合风速和风向分析发现夏季区域传输和本地生成对SO_4~(2-)和NO_3~-均有贡献，冬季则主要是本地生成为主。夏季硫氮转化速率为0.26和0.14，冬季硫氮转化速率均为0.09，夏季SO_4~(2-)和NO_3~-的转化效率更高。本研究可为太原盆地相关城市PM_(2.5)污染改善工作提供参考。

关键词(KeyWords)： 硫酸根;硝酸根;硫氮转化;无机气溶胶;煤烟型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(42077201);; 国家生态环境部攻关项目(DQGG202107);; 太原科技大学博士启动基金(20202072)

作者(Author): 王伟,田晓,崔阳,郭利利,何秋生,王新明

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