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在中国的雾事件中,二次气溶对颗粒物污染的贡献很高

Ru-Jin Huang¹, Yanlin Zhang², Carlo Bozzetti³

¹1] Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), 5232 Villigen, Switzerland [2] State Key Laboratory of Loess and Quaternary Geology (SKLLQG), and Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China [3].

|September 19, 2014

概括

中国中国中国中国.

科学领域:

环境科学环境科学
大气化学大气化学
公共卫生公共卫生

背景情况:

快速的工业化增加了空气污染,影响了空气质量,气候和健康.
中国面临严重的颗粒物 (PM2.5) 污染,在2013年影响了8亿人.
政府的目标是到2017年将PM2.5减少25%,需要了解污染源.

研究的目的:

在中国主要城市调查PM2.5的化学成分和来源.
阐明导致严重雾污染事件的因素.
为控制PM2.5和减轻其影响制定战略.

主要方法:

利用了新的离线分析技术和统计方法.
分析了2013年1月北京,上海,广州和西安的颗粒物样本.
结合了多种先进的离线分析方法和统计技术.

主要成果:

二次气溶形成显著推动了严重的雾污染.
二次气溶占PM2.5的30-77%和有机气溶的44-71%.
二次有机气溶 (SOA) 和二次无机气溶 (SIA) 的重要性相似 (SOA/SIA比率:0.6-1.4).

结论:

控制中国的PM2.5需要减少主要颗粒物排放和二次气溶前体.
减轻化石燃料燃烧和生物质燃烧产生的排放量至关重要.
有效的控制策略可以减少颗粒污染对环境,经济和健康的影响.

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