中国四川省成都市における大気中汚染物質の存在形態  [in Japanese] Physical form of pollutants in the atmosphere in Chengdu, Sichuan Province, China  [in Japanese]

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Abstract

大気中に存在する環境汚染物質の物理的存在形態を明らかにすることを目的に,大気汚染の深刻な地域である中国四川省成都市において大気の採取を2通り(粒子除去用フィルターの有無)行い,水溶性イオン成分の測定を行った.その結果,F<SUP>-</SUP>は粒子態として, Cl<SUP>-</SUP>はガス態として大気中に存在していた.NO<SUB>3</SUB><SUP>-</SUP>は主に粒子態として大気中に存在していた. NO<SUB>2</SUB><SUP>-</SUP>は夜間に濃度が高くなるのに対し,NO<SUB>3</SUB><SUP>-</SUP>は日中に濃度が高くなる傾向であった. Sは定常的にSO<SUB>2</SUB>として大気中に存在しており,日中の人為起源排出量が増加する時間帯に,粒子態の濃度が増加していた.NO<SUB>3</SUB><SUP>-</SUP>およびSO<SUB>4</SUB><SUP>2-</SUP>の大気中での時間変動は,前駆物質を含む大気中への排出量だけでなく,大気中での様々な化学反応に支配されていた事が示唆された.

In order to identify the physical form of pollutants in the atmosphere in Chengdu, Sichuan Province, China, air samples containing particulate and inorganic gaseous substances were collected from 19 February to 1 March 2002 by 2 methods: a simple bubbling method (particles cut off and/or non cut off), and the measurement of anion species. The results revealed that F<SUP>-</SUP> existed as particulate matter and Cl<SUP>-</SUP> existed as a gas in the atmosphere. The concentration of NO<SUB>2</SUB><SUP>-</SUP> decreased during the period between nighttime to and daytime; on the other hand, the concentration of NO<SUB>3</SUB><SUP>-</SUP>increased during this period. Sulfur compounds existed as SO<SUB>2</SUB> in the atmosphere, and the concentration of SO<SUB>4</SUB><SUP>2-</SUP> as particulate matter increased in the daytime. Gas-phase reaction and liquid-phase reaction appear to be important in both generation and variation in the atmosphere because NO<SUB>3</SUB><SUP>-</SUP>and SO<SUB>4</SUB><SUP>2-</SUP> increase in the daytime.

Journal

  • Journal of the Japanese Society of Snow and Ice

    Journal of the Japanese Society of Snow and Ice 69(5), 611-617, 2007-09-15

    The Japanese Society of Snow and Ice

References:  19

Codes

  • NII Article ID (NAID)
    10019840219
  • NII NACSIS-CAT ID (NCID)
    AN00131221
  • Text Lang
    JPN
  • Article Type
    NOT
  • ISSN
    03731006
  • NDL Article ID
    8939102
  • NDL Source Classification
    ZM43(科学技術--地球科学--気象)
  • NDL Call No.
    Z15-23
  • Data Source
    CJP  NDL  J-STAGE 
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