[维南市的PM2.5的化学组成和来源]
Jing-Ning Guo1, Xiao-Fei Li1,2, Feng Yu1
1School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
Huan jing ke xue= Huanjing kexue
|December 15, 2023
概括
这项研究分析了冬季南市的PM2.5污染,确定燃煤,工业排放和尘埃是主要来源. 来自西北部地区的区域运输和当地排放对空气质量产生了重大影响.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 空气污染研究研究
背景情况:
- 颗粒物 (PM2.5) 对健康构成重大风险,特别是在城市地区的冬季.
- 了解PM2.5的化学成分和来源对于有效的空气质量管理至关重要.
研究的目的:
- 在冬季在南市的PM2.5中描述碳化合物成分和无机离子.
- 通过使用先进的分析方法,确定导致PM2.5污染的来源和来源区域.
主要方法:
- 从2020年12月到2021年1月收集的PM2.5样本的分析.
- 积极矩阵分解 (PMF),潜在源贡献因子 (PSCF) 和度加权轨迹 (CWT) 模型的应用.
- 对碳化合物成分和水溶性无机离子进行化学分析.
主要成果:
- PM2.5,OC和EC度在白天比晚上更高.
- 主要的离子在白天 (F−>NO3−>Ca2+) 和晚上 (NO3−>SO42−>Ca2+) 之间有所变化,PM2.5分别表现出酸性和性特征.
- 煤炭燃烧,工业排放,尘埃和二次形成是主要来源,西北省份的区域运输和当地排放是主要贡献者.
结论:
- 燃煤和工业活动是温南冬季PM2.5的主要原因.
- 来自甘,内蒙古和宁夏的大气运输,以及来自阳,西安和通川等附近城市的排放,显著影响了当地空气质量.
- 有效的污染控制策略应应对当地工业和国内排放以及区域运输路径.
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