STUDIES ON GUIDELINES TO KEEP HEALTHY DAILY LIFE FROM INJURIES CAUSED BY INDOOR AIR POLLUTANTS

本研究的目的是为制定保持舒适健康的室内空气质量指南提供有用的信息。采用被动采样法对东京周边地区约100户家庭的居室内空气污染物进行了检测。结果表明：夏季高温高湿，甲醛浓度升高;然而，大多数浓度被观察到低于80 ppb的室内空气质量标准。新建和改造的房屋会释放出较高的甲醛，但三年后会大大降低。在冬季，二氧化氮的水平很高，因为没有烟囱的供暖设施，如煤气和煤油炉，被用来排放燃烧后的气体到室内。偶尔，浓度范围超过空气质量标准4至6倍。夏季氨氮浓度普遍较高，这可能与环境温度有关。此外，他们非常高的房子与家猫通过一年。真菌数量夏季高，冬季低。这一趋势将来自季节性湿度变化。枝孢霉属、青霉属是室内环境中最常见的真菌。本研究的结果将为从室内空气品质的观点出发，制定健康生活的指导方针提供重要的参考。

The aim of this study is to obtain the useful information for compilation of the guidelines to keep the comfortable and healthy indoor air quality. Indoor air pollutants in living rooms in about 100 families in around Tokyo were examined based on a passive sampling methodology. As a result, the characteristics of the pollutants were grasped as follows : Concentration of formaldehyde was raised in summer due to high temperature and humidity. However, most of the concentrations were observed to be less than 80 ppb of indoor air quality standard. Newly built and reformed houses would release high level formaldehyde but it would be greatly decreased in three years. Nitrogen dioxide was found at a high level in winter because heating facilities without stack such as gas and kerosene stoves were used to emit burned gas indoors. Occasionally, the concentrations ranged more than air quality standard by a factor of 4 to 6. Ammonia concentrations were generally high in summer which may be related to the ambient temperature. Moreover, they were very high in a house with domestic cats through a year. Fungi amount was high in summer and low in winter. This trend would be derived from the seasonal humidity variation. Cladosporium, and Penicillium were observed to be the most popular fungus species in indoor environment. It is concluded that these findings in this study will be important information to compile the guidelines to secure our healthy daily lives from the standpoint of indoor air quality.