Study on dry deposition of sulfur dioxide to the Chinese desert soil and estimation of its dry removal from the atomosphere

中国荒漠土壤二氧化硫干沉降研究及其从大气中干去除量的估算

• 批准号: 09480114
• 负责人: SAKAMOTO Kazuhiko
• 金额: $ 5.06万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09480114/
• 关键词: desert soil; Yellow sand particles; sulfur dioxide; dry deposition; deposition velocity; basicity; relative humidity; photoirradiation; 中国砂漠土壌; ニ酸化硫黄; 不均一反応; 光触媒; 人工肺; 濃瓊測定法; 酸性ガス

In order to obtain the fundamental data to estimate the removal amount of SO_2 from the atmosphere by its dry deposition on the Chinese desert and yellow sand soils, we investigated the exposure of the above soils and several model soils to the experimental gases containing trace level of SO_2, NO_2, or HNO_3. The results obtained by the above exposure experiments etc, were summarized as below.1) Elemental analyses for desert yellow sand soils in China were achieved. The results indicated the intimate relation of acidity of soil particles with content of Ca. It suggests the relation of soil acidity with the frequency of acid rain appearence.2) Dry deposition velocity of SO_2 to desert and yellow sand soils in China depended on soil alkalinity and humidity of exposure gas.3) Dry deposition velocity of HNO_3 to various soils was similar level of that of SO_2. While, that of NO_2 was much lower than that of SO_2.4) S(VI)/S(IV) deposited on desert, yellow sand, and model soils was increased with increase in the humidity of exposure gas and the irradiation time with a simulated sun-light (black-light).5) The artificial lung was applied to collection of low concentration SO_2 and gaseous HNO_3.6) In order to estimate the removal amount of SO_2 from the atmosphere by its dry deposition on the Chinese desert and yellow sand soils, further investigation is needed.

为了获得估算SO_2在中国荒漠和黄沙土壤上干沉降对大气中SO_2去除量的基础数据，我们研究了上述土壤和几种模式土壤对含微量SO_2、NO_2和HNO_3的实验气体的暴露。通过上述暴露试验等获得的结果如下：1）完成了我国荒漠黄沙土的元素分析。结果表明，土壤颗粒酸度与Ca含量有密切关系。2）SO_2在我国荒漠和黄砂土壤中的干沉降速率取决于土壤的碱度和暴露气体的湿度; 3）HNO_3在各种土壤中的干沉降速率与SO_2的干沉降速率基本一致。而NO_2则远低于SO_2。4）S（VI）/S（IV）沉积在沙漠、黄沙、随着暴露气体湿度的增加和模拟日光照射时间的延长，5）将人工肺应用于低浓度SO_2和HNO_3气体的收集。6）为了估算SO_2的去除量，对人工肺进行了实验研究2在中国沙漠和黄砂土壤中的干沉降作用，有待于进一步研究。

项目成果

高世東: "中国重慶市における大気硫黄化合物の乾性沈着について" エアロゾル研究. 13. 44-50 (1998)

高世东：“中国重庆大气硫化合物的干沉降”，气溶胶研究，13。44-50（1998）。

Kazuhiko Sakamoto: "Study on dry deposition of SO_2 to Chinese desert soils" Proceedings of 6th International Conference on Atmospheric Sciences and Applications to Air Quality. (印刷中). (1999)

坂本和彦：“中国沙漠土壤中SO_2干沉降的研究”，第六届国际大气科学与空气质量应用会议论文集（1999年出版）。

W.Wang, K.Sakamoto, W.Wang, D.Tang, J.Du, and J.Gao: "Pollution charateristics of atmospheric aerosol and its relations to acid rain at the southern area of Fujian province in china(in Japanese)" J.Jpn.Soc.Atmos.Environ.32. 2094-215 (1997)

W.Wang、K.Sakamoto、W.Wang、D.Tang、J.Du、J.Gao：“中国闽南地区大气气溶胶污染特征及其与酸雨的关系（日文）

W.Wang, K.Sakamoto, W.Wang, D.Tang, and J.Du: "Acidity and buffering ability to precipitation acidification of atmospheric aerosols collected in China(in Japanese)" J.Aerosol Research Jpn.12. 92-102 (1997)

W.Wang、K.Sakamoto、W.Wang、D.Tang 和 J.Du：“中国收集的大气气溶胶的酸度和沉淀酸化的缓冲能力（日文）”J.Aerosol Research Jpn.12。

H.Ishihara, H.Nakano, T.Kambayashi, M.Ohi, I.Iwamoto, and K.Sakamoto: "Laboratory study on deposition and oxidation to sulfate of SO_3 by use of model soil, CaCO_3" Proceedings of 6th International Conference on Atmospheric Sciences and Applications to Ai

H.Ishihara、H.Nakano、T.Kambayashi、M.Ohi、I.Iwamoto 和 K.Sakamoto：“利用模型土壤 CaCO_3 对 SO_3 沉积和氧化成硫酸盐的实验室研究”第六届国际会议论文集