パッシブサンプラー採取による大気中揮発性有機化合物濃度の経年変化観測(2001~2004)  [in Japanese] Observation of Annual Changes in Concentrations of Atmospheric VOCs by the Collection with Passive Samplers (2001-2004)  [in Japanese]

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Author(s)

    • 松下 和正 MATSUSHITA Kazumasa
    • 京都工芸繊維大学大学院工芸科学研究科物質工学専攻 Department of Chemistry and Material Technology, Kyoto Institute of Technology
    • 仲村 恭輝 NAKAMURA Mitsuaki
    • 京都工芸繊維大学大学院工芸科学研究科物質工学専攻 Department of Chemistry and Material Technology, Kyoto Institute of Technology
    • 山田 悦 YAMADA Etsu
    • 京都工芸繊維大学大学院工芸科学研究科物質工学専攻|京都工芸繊維大学環境科学センター Department of Chemistry and Material Technology, Kyoto Institute of Technology|Center for Environmental Science, Kyoto Institute of Technology

Abstract

パッシブサンプラーによる大気中揮発性有機化合物{VOCs(ベンゼン,トルエン及びキシレン)}の長期間モニタリング法を用い,京都市におけるVOCs濃度の経年変化(2001~2004年)を求めた.2001年にほとんどの地点で環境基準値3 μg/m<sup>3</sup>を超えていたベンゼン濃度が,2004年には交通量の多い交差点でも環境基準値以下に低下し,トルエンとキシレン濃度も2001年の1/4~1/2に低下しており,大気中VOCs濃度の明らかな低下傾向が認められた.一方,大気中NO<sub>2</sub>濃度は,VOCs濃度とは異なりほとんど一定あるいはやや増加する傾向を示した.ガソリン中ベンゼン含有率引き下げの効果に加えて,2001年の化学物質管理法(PRTR法)の施行で事業所からのVOCs排出が減少し,ベンゼンだけでなくトルエンやキシレン濃度も減少したと考えられる.大学では2004年からの労働安全衛生法の適用も大気中VOCs削減に影響を与えていると推測できる.<br>

A long-term monitoring method of volatile organic compounds (VOCs), such as benzene, toluene, and xylene in the atmosphere by using passive samplers was applied to analyzing the annual changes in the concentrations of atmospheric VOCs in Kyoto City from March 2001 to December 2004. The average concentrations of ambient benzene, which were higher than the environmental criterion (3.0 μg/m<sup>3</sup>), except for those on Mt. Daimonji in 2001, decreased to below 3.0 μg/m<sup>3</sup> at all sampling stations in 2004. The average concentrations of ambient toluene and xylene in 2004 were lower than those in 2001 by 1/4∼1/2 times. The decrease of atmospheric VOCs concentrations in Kyoto City was evidently observed from 2001∼2004. While, the average concentrations of ambient NO<sub>2</sub> were almost constant, or slightly increased. The decrease in ambient benzene may have been due to a decrease in the benzene content in gasoline by the end of 1999, and also by implementation of the Pollutant Release and Transfer Register (PRTR) Act in 2001. The implementation of the PRTR Act may have also affected the decrease in the atmospheric concentrations of other VOCs. Furthermore, the decrease of ambient VOCs in our institute may have been attributed to the application of the Labor, Safety and Health Law to the universities in April 2004.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 54(9), 849-854, 2005

    The Japan Society for Analytical Chemistry

Cited by:  1

Codes

  • NII Article ID (NAID)
    110002910492
  • NII NACSIS-CAT ID (NCID)
    AN00222633
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0525-1931
  • NDL Article ID
    7489305
  • NDL Source Classification
    ZP4(科学技術--化学・化学工業--分析化学)
  • NDL Call No.
    Z17-9
  • Data Source
    CJPref  NDL  NII-ELS  J-STAGE  NDL-Digital 
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