市原市における大気中炭化水素濃度の推移

概要

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Atmospheric C2-C, hydrocarbons such as ethylene, propylene, benzene and toluene were measured every once a year during 14 years from 1986 to 1999 at 40 sites in Ichihara city, in Japan. This city consist of three characteristics area as follows. The northern area contains the large petrochemical kombinat along the front of the Tokyo Bay, the central area contains highly populated town, and the southern area contains farm and forest. The obtained data of each area were averaged and compared every year. The average concentrations of almost hydrocarbons, especially ethylene, propylene and styrene in the industrial area were higher than those of the town area, but acetylene was an exception. The median of all data of each year indicate that the concentration of ethylene has been increasing recent two years, on the other hand the concentration of acetylene and benzene have been decreasing from 1990.
横浜国立大学の論文