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首页> 外文期刊>Atmospheric chemistry and physics >Mixing state of oxalic acid containing particles in the rural area of Pearl River Delta, China: implications for the formation mechanism of oxalic acid
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Mixing state of oxalic acid containing particles in the rural area of Pearl River Delta, China: implications for the formation mechanism of oxalic acid

机译：珠江三角洲农村地区含有颗粒的混合状态：对草酸形成机制的影响

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摘要

The formation of oxalic acid and its mixing state in atmospheric particulate matter (PM) were studied using a single-particle aerosol mass spectrometer (SPAMS) in the summer and winter of 2014 in Heshan, a supersite in the rural area of the Pearl River Delta (PRD) region in China. Oxalic-acid-containing particles accounted for 2.5 and 2.7% in total detected ambient particles in summer and winter, respectively. Oxalic acid was measured in particles classified as elemental carbon (EC), organic carbon (OC), elemental and organic carbon (ECOC), biomass burning (BB), heavy metal (HM), secondary (Sec), sodium-potassium (NaK), and dust. Oxalic acid was found predominantly mixing with sulfate and nitrate during the whole sampling period, likely due to aqueous-phase reactions. In summer, oxalic-acid-containing particle number and ozone concentration followed a very similar trend, which may reflect the significant contribution of photochemical reactions to oxalic acid formation. The HM particles were the most abundant oxalic acid particles in summer and the diurnal variations in peak area of iron and oxalic acid show opposite trends, which suggests a possible loss of oxalic acid through the photolysis of iron oxalato-complexes during the strong photochemical activity period. In wintertime, carbonaceous particles contained a substantial amount of oxalic acid as well as abundant carbon clusters and BB markers. The general existence of nitric acid in oxalic-acid-containing particles indicates an acidic environment during the formation process of oxalic acid. The peak areas of nitrate, sulfate and oxalic had similar temporal change in the carbonaceous type oxalic acid particles, and the organosulfate-containing oxalic acid particles correlated well with total oxalic acid particles during the haze episode, which suggests that the formation of oxalic acid is closely associated with the oxidation of organic precursors in the aqueous phase.
机译：在2014年夏季和冬季在鹤山的夏季和冬季，在恒星河三角洲农村地区进行了一颗粒子气溶胶质谱仪（垃圾邮件），研究了草酸和其混合状态。 （PRD）地区在中国。含有草酸酸的颗粒分别在夏季和冬季的总检测到的环境颗粒中占2.5％和2.7％。在分类为元素碳（EC），有机碳（OC），元素和有机碳（ECOC），生物质燃烧（BB），重金属（HM），二次（SEC），钠 - 钾（NAK）中的颗粒中测量草酸）和灰尘。发现草酸主要在整个取样时期与硫酸盐和硝酸盐混合，可能是由于水相反应。在夏季，含草酸的颗粒数和臭氧浓度遵循非常相似的趋势，这可能反映光化学反应对草酸形成的显着贡献。 HM颗粒是夏季最丰富的草酸颗粒，铁和草酸峰面积的昼夜变化表现出相反的趋势，这表明在强大的光化学活性期间通过光解的铁酸盐的光解丧失。在冬季中，碳质颗粒含有大量的草酸以及丰富的碳簇和BB标记物。含草酸颗粒中硝酸的一般存在表示在草酸的形成过程中酸性环境。硝酸盐，硫酸盐和草出的峰面积在含碳型草酸颗粒中具有类似的时间变化，并且在雾霾事件期间含有机硫酸盐的草酸颗粒与总草酸颗粒相比很好地相关，这表明草酸的形成是与水相中有机前体的氧化密切相关。

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  • 来源
    《Atmospheric chemistry and physics》 |2017年第15期|共15页
  • 作者

    Cheng Chunlei; Li Mei; Chan Chak K.; Tong Haijie; Chen Changhong; Chen Duohong; Wu Dui; Li Lei; Wu Cheng; Cheng Peng; Gao Wei; Huang Zhengxu; Li Xue; Zhang Zhijuan; Fu Zhong; Bi Yanru; Zhou Zhen;

  • 作者单位

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    City Univ Hong Kong Sch Energy &

    Environm Hong Kong Hong Kong Peoples R China;

    Max Planck Inst Chem Multiphase Chem Dept Hahn Meitner Weg 1 D-55128 Mainz Germany;

    Shanghai Acad Environm Sci State Environm Protect Key Lab Format &

    Prevent U Shanghai 200233 Peoples R China;

    Guangdong Environm Monitoring Ctr State Environm Protect Key Lab Reg Air Qual Monit Guangzhou 510308 Guangdong Peoples R China;

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    Guangzhou Hexin Analyt Instrument Ltd Co Guangzhou 510530 Guangdong Peoples R China;

    Guangzhou Hexin Analyt Instrument Ltd Co Guangzhou 510530 Guangdong Peoples R China;

    Jinan Univ Inst Mass Spectrometer &

    Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

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  • 中图分类 大气科学（气象学）;
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