<報文>日本の酸性雨に関する原因解明

概要

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Up to now, the study of acidic rain in Japan seemed to have two errors, one of that the sea salt component ratio was regarded as a standard of the components in rain and two of that the source of pollutants did not examined. Therefore, in this report authors investigated the above two problems. Thus, it was found that the ratios of national rain 8 components, as NH_4^+, Na+, K+, Mg++, Ca++, Cl-, SO_4^{--}, NO_3^-, were respectively different from each other region in Japan. And then, main source of pollutants, as petroleum boiler gas, coal smoke, car exhaust gas and so on, indicated obvious characteristics. As the result of analysis of many environmental samples and source exhausts, the Diesel car exhaust become apparent to be the main origin of the acidic rain. That is, the acidic rain samples could be synthesized by national snow and Diesel car exhaust. And the other origins were unnecessary to explain the acidic rain phenomena. In Japan, the pollution of car exhaust universally detected and the injury by acidic rain as in Europe were not observed. Therefore, the influence of transfer from foreign country are not considered.
横浜国立大学の論文