Monthly and Diurnal Variation of the Concentrations of Aerosol Surface Area in Fukuoka, Japan, Measured by Diffusion Charging Method
Monthly and Diurnal Variation of the Concentrations of Aerosol Surface Area in Fukuoka, Japan, Measured by Diffusion Charging Method
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DOI：
10.3390/atmos8070114
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发表时间：
2017-07-01
期刊：
影响因子：
2.9
通讯作者：
Takami, Akinori
中科院分区：
文献类型：
--
作者：
Kiriya, Miho;Okuda, Tomoaki;Takami, Akinori
观察周围的气溶胶表面积浓度对于了解气溶胶的毒性很重要，因为增加的表面积可以作为气溶胶颗粒和生物细胞之间某些反应的强化反应界面，以及用于吸附和携带最初在气相中的共同污染物的延伸表面。在这项研究中，测量了2015年4月至2016年3月日本福冈的气溶胶表面积浓度。我们研究了气溶胶表面积与黑碳(BC)和硫酸盐浓度之间的月变化和日变化。全年的气溶胶表面积浓度与BC的浓度密切相关，BC的表面积相对较大，因为BC颗粒通常是由小得多(几十纳米)的初级烟尘颗粒组成的亚微米团聚体。气溶胶表面积与BC浓度之间的回归斜率在2015年8月和9月最高。我们提出的证据表明，这是由起源于日本主要岛屿的气团比例增加造成的。这可能会加强公元前从日本主要岛屿进入福冈的情况，我们假设这些岛屿相对新鲜或没有涂层，从而保持其更大的表面积。
Observation of the ambient aerosol surface area concentrations is important to understand the aerosol toxicity because an increased surface area may be able to act as an enhanced reaction interface for certain reactions between aerosol particles and biological cells, as well as an extended surface for adsorbing and carrying co-pollutants that are originally in gas phase. In this study, the concentration of aerosol surface area was measured from April 2015 to March 2016 in Fukuoka, Japan. We investigated the monthly and diurnal variations in the correlations between the aerosol surface area and black carbon (BC) and sulfate concentrations. Throughout the year, aerosol surface area concentration was strongly correlated with the concentrations of BC, which has a relatively large surface area since BC particles are usually submicron agglomerates consisting of much smaller (tens of nanometers) sized primary soot particles. The slopes of the regression between the aerosol surface area and BC concentrations was highest in August and September 2015. We presented evidence that this was caused by an increase in the proportion of airmasses that originated on the main islands of Japan. This may enhance the introduction of the BC to Fukuoka from the main islands of Japan which we hypothesize to be relatively fresh or "uncoated", thereby maintaining its larger surface area.