Origin and transformation of ambient volatile organic compounds during a dust-to-haze episode in northwest China
Origin and transformation of ambient volatile organic compounds during a dust-to-haze episode in northwest China
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西北一次沙尘天气过程中环境挥发性有机物的起源与转化
DOI：
10.5194/acp-20-5425-2020
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发表时间：
2020-05
影响因子：
6.3
通讯作者：
Cao J.
中科院分区：
文献类型：
--
作者：
Xue Y.;Huang Y.;Sai Hang Ho S.;Chen L.;Wang L.;Lee S.;Cao J.
抽象。二次有机气溶胶的高贡献，
中国细颗粒物污染负荷突出挥发性的作用
有机化合物（VOC）氧化。在这方面，颗粒活性金属
粉尘中的氧化物，如TiO 2和Fe离子，被认为会影响环境VOCs的光化学反应。以西安市为例，研究了沙尘-灰霾污染过程中挥发性有机化合物的来源和转化规律，并提出了沙尘会促进挥发性有机化合物氧化的假设。
验证当地汽车尾气（25%）和生物质燃烧（18%）被认为是环境VOC的两个最大贡献者。在尘土中
污染时期，VOCs负荷急剧下降，
观察到的成分。同时，二次氧化VOC
分数（即，丙酮醛）增加。源力，体力
分散和区域运输作为主要因素被排除在外，
环境VOCs的变化。在另一个方面，约2至3倍的抗肿瘤活性。
大气颗粒物中铁（Fe）和钛（Ti）的含量增加，反式/顺式-2-丁烯的比值迅速下降，表明粉尘可加速大气VOCs的氧化和二次有机气溶胶（SOA）前体物的形成。
Abstract. The high contribution of secondary organic aerosol to the
loading of fine particle pollution in China highlights the roles of volatile
organic compound (VOC) oxidation. In this respect, particulate active metallic
oxides in dust, like TiO2 and Fe ions, were proposed to influence the photochemical reactions of ambient VOCs. A case study was conducted at an urban site in Xi'an, northwest China, to investigate the origin and transformation of VOCs during a windblown dust-to-haze pollution episode, and the assumption that dust would enhance the oxidation of VOCs was
verified. Local vehicle exhaust (25 %) and biomass burning (18 %) were found to be the two largest contributors to ambient VOCs. In the dust
pollution period, a sharp decrease in the loading of VOCs and the aging of their
components were observed. Simultaneously, the secondary oxygenated VOC
fraction (i.e., methylglyoxal) increased. Source strength, physical
dispersion, and regional transport were eliminated as major factors for
the variation of ambient VOCs. In another aspect, about a 2- to 3-fold
increase in the loading of iron ( Fe ) and titanium ( Ti ) was found in the airborne particles, together with a fast decrease in trans-/cis-2-butene ratios, which demonstrated that dust can accelerate the oxidation of ambient VOCs and the formation of secondary organic aerosol (SOA) precursors.
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影响因子：
11.4
作者：
Yue Zhang;Fengxia Bao;M. Li;Chuncheng Chen;Jincai Zhao
通讯作者：
Yue Zhang;Fengxia Bao;M. Li;Chuncheng Chen;Jincai Zhao
DOI：
10.1016/j.scitotenv.2014.09.024
发表时间：
2015
期刊：
The Science of the total environment
影响因子：
--
作者：
Yanli Zhang;Xinming Wang;Zhou Zhang;Sujun Lü;Zhonghui Huang;Longfeng Li
通讯作者：
Yanli Zhang;Xinming Wang;Zhou Zhang;Sujun Lü;Zhonghui Huang;Longfeng Li
多床吸附管收集挥发性有机物方法的优化与评价
影响因子：
5.5
作者：
Ho Steven Sai Hang;Wang Liqin;Chow Judith C;Watson John G;Xue Yonggang;Huang Yu;Qu Linli;Li Bowei;Dai Wenting;Li Lijuan;Cao Junji
通讯作者：
Cao Junji
影响因子：
5
作者：
Ho, Steven Sai Hang;Ho, K. F.;Ip, H. S. S.
通讯作者：
Ip, H. S. S.
DOI：
10.1016/j.scitotenv.2015.12.070
发表时间：
2016-03
期刊：
The Science of the total environment
影响因子：
--
作者：
Hongmei Xu;Hongmei Xu;Junjie Cao;Junjie Cao;J. Chow;J. Chow;Ru-Jin Huang;Zhenxing Shen;L. Ch
通讯作者：
Hongmei Xu;Hongmei Xu;Junjie Cao;Junjie Cao;J. Chow;J. Chow;Ru-Jin Huang;Zhenxing Shen;L. Ch