Long range transportation and geochemical behavior of atmospheric pollutants derived from coal combustion

为了估算燃煤产生的大气污染物的远距离传输，在内陆地区（滋贺高原）和太平洋沿岸地区（府中市和八尾寺市）采集了大气沉降物（湿态和干态），测定了主要化学成分和多环芳烃（PAH）。在东京农业大学校园（世田谷区）及其附属农场和试验种植园进行了同样的观测，并从硫酸盐离子沉积的结果中考察了当地的特点。非海盐硫酸盐离子的沉积量分别在3月和6 ~ 8月出现较大值，非海盐硫酸盐离子的稳定硫同位素比值（δ ^<34>S）在3%0左右，但在6 ~ 8月出现较低值，约为-3%0。在日本海一侧也观察到类似的季节变化模式。这可能与夏季低同位素比硫酸根离子的沉积有关，春季高同位素比硫酸根离子沉积在太平洋一侧。（mug/m^2/月），滋贺高地为6.7，府中市为35.0，八雄寺市35.6，川崎市149。甲基菲与菲的比值在0.59 ~ 0.95之间，因此可以认为每个地点都受到工厂等固定污染源的影响。

In order to estimate the long range transportation of atmospheric pollutants derived from coal combustion, atomospheric deposition (wet and dry) was collected at inland area (Shiga Highland) and the Pacific Ocean side (Fuchu City and Hachiouji City), and major chemical components and polyaromatic hydrocarbons (PAH) were determined. The same observations were carried out at the campus of Tokyo University of Agriculture (Setagaya-ku) and attached farms and experimental plantation, and local characteristics were examined from the results of sulfate ion depositions.proportion of non sea-salt sulfate ion amounted to 72-94% of the total sulfate ion deposition. Deposition of non-sea salt sulfate ion showed large values in March and June to August, respectively.Stable sulfur isotope ratio of non-sea salt sulfate ion (delta^<34>S) ranged around 3%_0 but lower value of around -3%_0 was observed in June to August. Similar seasonal variation pattern was observed also at the Japan Sea side. This may be attributed to deposition of sulfate ion with low isotope ratio during summer, and it was found that sulfate ion with high isotope ratio deposited at the Pacific Ocean side during spring.Mean monthly deposition (mug/m^2/month) of 9 kinds of polyaromatic hydrocarbons (PAH), whuch are considered to be derived from combustion of coal, were 6.7 at Shiga Highland, 35.0 at Fuchu City, 35.6 at Hachiouji City and 149 at Kawasaki City. Ratio of methylphenanthrene to phenanthrene ranged from 0.59 to 0.95, and therefore it is considered that every location suffers from influences of pollutants from stationary sources such as factories.