Study on resolving the components and characteristics of volatile organic compounds of indoor air within different places

• Main Authors: TSAI,MING-TAO, 蔡明道
• Other Authors: YANG,CHI-RU
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/3x2m7p

碩士 === 嘉南藥理大學 === 環境工程與科學系 === 104 === With the rapid progress of modern technology, people spend longer time than before to stay indoors; therefore, the impact of indoor air quality, especially of the volatile organic compounds (VOCs), to human’s health cannot be neglected. This study examines the species of indoor VOCs with the method NIEA A715 - the testing of volatile organic compounds - stainless steel sampling can / gas chromatography mass spectrometry method, in order to estimate the regulatory control of current indoor air quality and to provide the information for the future amendment. The total number 170 of private and public indoor areas, divided into 10 categories, have been sampled indoor air and analyzed 98 species of VOCs (xylene including the o-xylene, p-xylene, and m-xylene). The result shows according to the average concentrations of total VOCs (TVOC, the total of twelve VOCs) of the 10 categories areas, the areas are sorted, from the highest to the lowest, as follows, railway stations, medical institutions, college and university library, government office, public library, airports, shopping malls, social welfare institutions, exhibition halls, and metropolitan rapid transportation (MRT) stations. Among the 98 VOCs species, the top ten highest average concentrations are methanol, acetone, toluene, chlorodifluoromethane, iso-pentane, propane, xylene, 2-butanone, n-butane, and n-pentane. The twelve regulated VOCs species from the 170 sampling areas, based on their average concentrations, are sorted from the highest to the lowest as follows, toluene, xylene, dichloromethane, benzene, ethylbenzene, styrene, chloroform, 1,4-dichlorobenzene, carbon tetrachloride, trichloroethylene, tetrachloroethylene, and 1,2-dichlorobenzene, wherein trichloroethylene, tetrachloroethylene, 1,2-dichlorobenzene are not found. The most frequent detected species of the twelve regulated VOCs species, are toluene, dichloromethane, benzene, xylene, ethylbenzene, styrene, chloroform, 1,4-dichlorobenzene, carbon tetrachloride. Three species, trichloroethylene, tetrachloroethylene, and, 1,2-dichlorobenzene, are not found. Five regulated species detected from more than 50% of the 170 sampling areas are toluene, dichloromethane, benzene, xylene, and ethylbenzene. Within the 10 category areas, the average concentration of toluene is the highest among other VOCs species, with the exception of MRT stations. The second and the third highest concentration VOCs species are xylene and dichloromethane, respectively. The top ten highest average concentrations of the non-regulated VOCs species from the 170 sampling areas are as follows, methanol, acetone, chlorodifluoromethane, iso-pentane, propane, 2-butanone, n-butane, n-pentane, n-hexane, and 2-methyl pentane. The top ten most frequent detected non-regulated VOCs species are 2-methyl-pentane, acetone, propane, 2-butanone, methanol, iso-pentane, chlorodifluoromethane, n-pentane, n-hexane, and n-butane. Nine non-regulated species detected from more than 50% of the 170 sampling areas are 2-methylpentane, acetone, propane, 2-butanone, methanol, iso-pentane, a chlorodifluoromethane, n-hexane, and n-pentane. Each aggregate place recommendations into pollutant standards: benzene, 1,2,4-trimethyl benzene, acrolein, 1,3-butadiene, 1,2-dichloroethane, acrylonitrile, 1,4-dichlorobenzene, vinyl chloride, and carbon tetrachloride, can be incorporated pollutant standards: 1,2,3-trimethylbenzene and 1,3,5-trimethylbenzene, suggested deleting pollutant standards: trichloroethylene, tetrachloroethylene, 1,2-dichlorobenzene, can remove the contaminant standards: toluene, xylene, dichloromethane, ethylbenzene, styrene, and chloroform. The results of this study provide the information for the amendment of current indoor air regulation; and then through the precise control to reduce the hazard of indoor air pollution to human health.