Laboratory and field measurements of dry deposition of sulfur dioxide onto Chinese loess surfaces
Laboratory and field measurements of dry deposition of sulfur dioxide onto Chinese loess surfaces
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DOI：
10.1021/es034967p
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发表时间：
2004-06-15
影响因子：
11.4
通讯作者：
Quan, H
中科院分区：
文献类型：
--
作者：
Sorimachi, A;Sakamoto, K;Quan, H
利用黄土高原土壤样品，通过室内和野外观测，研究了SO_2在黄土表面的干沉降。在北京和兰州进行了现场试验，采用土壤作为被动采样介质，直接测量SO_2在土壤上的干沉降。在实验室条件下，我国土壤表面的高碱度使其对SO_2沉降的吸收速率很高，吸收速率与土壤pH值和相对湿度有关。此外，我们评估了一些影响测量精度的因素：SO2吸收的响应，重复性，回收系数，以及与收集器上的重量和表面覆盖度相关的可变性。结果表明，测量精度主要与SO2沉降量与原始土壤含硫量的比值有关。这一结果与现场观察结果一致。实验室和现场的结果表明，一个很好的协议，从不同地区的土壤表面的结果中固有的SO2吸收。
Laboratory and field measurements were conducted to examine dry deposition Of SO2 onto Chinese loess surfaces using native soil sampled in the loess plateau, China. The field tests were employed in Beijing and Lanzhou, China, by directly measuring the dry deposition Of SO2 on soil, which uses soil put on a collector as an SO2 passive sampling medium. In the laboratory, a high rate of uptake to SO2 deposition for Chinese soil surfaces due to the highly alkalinity was found. The uptake Of SO2 deposition was dependent on the pH soil and relative humidity. Furthermore, we evaluated some factors that affect the measurement precision: response Of SO2 uptake, repeatability, recovery factor, and variability associated with the weight and the surface coverage on the collectors. As a result, it was shown that the measurement precision was primarily related to the ratio of the SO2 deposition amount relative to the sulfur content of the original soil. This result was consistent with the field observations. The laboratory and field results indicated an excellent agreement on the SO2 uptake inherent in the results from the soil surfaces in different regions.