乙二醛和甲基乙二醛的来源及其环境效应  

Sources and environmental effects of glyoxal and methylglyoxal

作　　者：黄俊霖 Tham Yee Jun 于潇禹 凌镇浩 HUANG Junlin;THAM Yee Jun;YU Xiaoyu;LING Zhenhao(School of Atmospheric Sciences,Sun Yat-Sen University,Zhuhai 519082,China;School of Marine Sciences,Sun Yat-Sen University,Zhuhai 519082,China)

机构地区：[1]中山大学大气科学学院,珠海519082 [2]中山大学海洋科学学院,珠海519082

出　　处：《地球环境学报》2024年第3期402-420,共19页Journal of Earth Environment

基　　金：国家自然科学基金项目(42175118,41775114)。

摘　　要：乙二醛和甲基乙二醛作为多种挥发性有机物的氧化反应中间产物,是臭氧和二次有机气溶胶的关键前体物。乙二醛和甲基乙二醛有着复杂的来源,既能通过多种自然或人为源直接排放,也可由诸多挥发性有机物二次氧化生成。由于排放及其前体物浓度与组成存在差异,乙二醛及甲基乙二醛的浓度与来源特征在时间与空间分布上均有所不同,从而使其环境效应也呈现明显的时空分布差异。围绕乙二醛与甲基乙二醛的污染特征及环境效应,综述乙二醛和甲基乙二醛的浓度水平、时空分布、来源特征,并总结分析其在臭氧和二次有机气溶胶生成中的作用。在此基础上,讨论和分析未来关于乙二醛和甲基乙二醛的研究的方向。Background,aim,and scope Glyoxal and methylglyoxal,which are intermediate products of the oxidation of volatile organic compounds(VOCs),are key precursors of ozone(O_(3))and secondary organic aerosols(SOA).Glyoxal and methylglyoxal have complicated origins and can be emitted directly from a wide range of natural or anthropogenic sources as well as secondarily formed through the oxidation of many VOCs.Therefore,the concentrations and sources of glyoxal and methylglyoxal have clear spatial and temporal variations,which further result in spatial and temporal variations in their environmental effects.This paper reviews studies on the abundance,distribution,sources,and health risks associated with glyoxal and methylglyoxal and their contributions to ozone and secondary organic aerosol formation.This paper,thus,provides basic data and scientific information for a better understanding of the origins,chemical degradation,and environmental effects of glyoxal and methylglyoxal in the atmosphere.Materials and methods We collected the concentration data of glyoxal and methylglyoxal in different environments and laboratory experiments from recent studies,analyzed the spatial and temporal variations in the concentrations of glyoxal and methylglyoxal,investigated their source apportionments,and evaluated the environmental effects based on different parameterization methods and model simulations.Results(1)The distribution of glyoxal and methylglyoxal concentrations was characterized by higher concentrations in developed cities than in underdeveloped areas,higher concentrations in than in the suburbs and villages,high concentrations in the early morning,and low concentrations at midday.(2)Seasonal patterns of glyoxal and methylglyoxal levels vary across different areas.The variations in glyoxal and methylglyoxal concentrations in urban areas were characterized by low concentrations in winter and high concentrations in summer,whereas,glyoxal and methylglyoxal concentrations in rural and mountainous areas were high in summer and lo

关 键 词：乙二醛 甲基乙二醛 源解析 臭氧 二次有机气溶胶 

分 类 号：X51[环境科学与工程—环境工程]