Wet and Dry Deposits of Polycyclic Aromatic Hydrocarbons and Their Distribution to Soils, Sediments and Organisms

阐明了环境中多环芳烃(PAHs)的去向。对降水、干沉降物、土壤、沉积物、上层水和生物进行了调查。对富山县中部市郊地区的降水和干落进行了为期一年半的详细调查。每月收集降水1~4次。分析了多环芳烃的浓度、组成和沉降量，以及多环芳烃在颗粒相和溶解相之间的分配。并对沉淀的致突变性进行了分析。干燥的尘埃每1-2个月收集一次。分析了干沉降物的沉积负荷量和多环芳烃的组成。有关土壤的调查是在三个地区进行的，即新稻田市、大泽野镇和位于富山县和石川县县交界的伊欧山山脉。从距市区和主干道的距离以及有机质的含量等方面分析了土壤中多环芳烃的浓度和组成。对流经富山县中部的葛洲河及其发源地水津山上的水库进行了沉积物、上层水和生物的调查。阐述了沉积物、上层水体和生物体中多环芳烃的分布特征。探讨了水环境中多环芳烃的分布特征。

The fate of polycyclic aromatic hydrocarbons (PAHs) in the environment was elucidated. Investigation concerning precipitation, dry fallout, the soil, sediments, upper layer water and organisms was executed. The detailed investigation concerning precipitation and dry fallout was carried out for one and a half years in the city outskirts region in the central part of Toyama Prefecture. Precipitation was gathered 1-4 times at each month. The concentration, the composition and the amount of the deposit load of PAHs were analyzed as well as the partition of PAHs between the particulate and dissolved phases. The mutagenicity of precipitation was also analyzed. Dry fallout was gathered once every 1-2 months. The amount of the deposit load and the composition of PAHs with the dry fallout were analyzed. The investigation concerning the soil was executed in three regions, that is, Shinminato City, Osawano Town, and Io mountain ranges located in the prefecture boundary in Toyama Prefecture and Ishikawa Prefecture in addition. The concentration and the composition of PAHs in the soil was analyzed from factors such as the distance from the urban area and the trunk line road as well as the amount of the organic matter. The investigation concerning sediments, upper layer water and organisms was carried out in the Gejo river which flowed in the central part of Toyama Prefecture and in reservoirs distributed on the Imizu hill which was the source region of the Gejo river. The distribution characteristics of PAHs included in sediments, upper layer water and organisms were elucidated. The distribution characteristics of PAHs in the water environment were discussed.