著者

鳥山 成一 田中 敦 西川 雅高 島林 誠 松井 あきえ 米田 京平 山﨑 敬久 溝口 俊明 木戸 瑞佳 中村 篤博 中谷 訓幸

出版者

特定非営利活動法人 エコテクノロジー研究会

雑誌

エコテクノロジー研究 (ISSN:18819982)

巻号頁・発行日

vol.13, no.4, pp.271-276, 2008

被引用文献数

2

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For the emission gas concentration measurement of sublimable gas phase boron compounds, the optimal collector material applied to the inside stack sampler (the type-1 stack sampler developed in our previous article) was examined. The collection efficiency of alkali impregnated filter paper of calcium carbonate and magnesium hydroxide was investigated by the use of artificial stack. It was revealed that calcium carbonate filter paper have a high collection efficiency and fully applicable to the type-1 stack sampler equally to potassium carbonate filter paper examined in our previous study. However, magnesium hydroxide filter paper is not suitable for the collection agent.

著者

中村 篤博 成田 祥 金澤 啓三 植松 光夫

出版者

日本エアロゾル学会

雑誌

エアロゾル研究 (ISSN:09122834)

巻号頁・発行日

vol.32, no.1, pp.4-13, 2017-03-20 (Released:2017-04-03)

参考文献数

30

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Chemical compositions and particle number densities of atmospheric aerosols were measured continuously in the coastal area of Seto Inland Sea during the spring of 2015. The mean concentrations of NH4+, NO3-, and water soluble organic nitrogen (ONws) were 1.6, 0.85, and 0.28 μg N m-3, respectively in total sampling mode. NO3- existed in both fine and coarse modes, while NH4+ and ONws existed primarily in fine mode. On the days of normal atmospheric conditions, the amount of ONws contributing to the total nitrogen was about 14% N in both fine and coarse sampling modes. This ratio was equivalent to the amount of NO3- content in fine mode and NH4+ in coarse mode. On the days with polluted atmospheric conditions, the amount of ONws contributing to total nitrogen was about 9.3% N in fine mode and about 5.0% N in coarse mode. This ratio was equivalent to the contributions of NO3- in fine mode and NH4+ in coarse mode. Dry deposition fluxes of particulate NH4+, NO3-, and ONWS in the area were 280, 660, and 83 μg N m-2 day-1, respectively. The flux of NO3- was more effective than any other nitrogen compounds, since the deposition rate depends upon a size distribution. The dry deposition of ONws accounted for about 8.1% of the total nitrogen dry deposition. Thus, ONWS cannot be ignored when considering the nitrogen budget and cycles in this area.