Seasonal characteristics of ambient volatile organic compounds in Seoul, Korea

被引:169
作者
Na, K
Kim, YP
机构
[1] Korea Inst Sci & Technol, Global Environm Res Ctr, Seoul 130650, South Korea
[2] Yonsei Univ, Dept Chem Engn, Seodaemun Ku, Seoul 120749, South Korea
关键词
C-2-C-9 seasonal concentrations; emission sources; temperature; amount used; photochemical reactivity;
D O I
10.1016/S1352-2310(00)00464-7
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The measurements of C-2-C-9 volatile organic compounds (VOC) were carried out at a site in Seoul. the capital of Korea From August 1998 to July 1999. Air samples were collected for 24 h in 61 SUMMA canisters every 6 days. The canister samples were quantitatively analyzed by a GC/FID and GC/MS. The species with the highest mean concentration among the 70 identified was propane (7.8 ppb), followed by toluene (6.4 ppb) and ethylene (5.9 ppb). The high concentration of propane was mainly attributed to the emissions by liquefied petroleum gas (LPG) usage for cooking and heating, and butane fuel for transportation. The general trend of the seasonal variation shows higher concentrations in winter and lower ones in summer. This behavior was mainly caused by the variations of temperature. and resultant VOC source strengths, coupled with the variations of the mixing depth. According to the analysis of concentration ratios, the seasonal contributions of the major emission sources to the VOC concentrations were influenced by ambient temperature. Further, it was identified that the contributions by the use of solvents, natural gas, LPG, and butane Fuel were closely related to the variations of consumption pattern according to seasons. Through the analysis of the concentration correlations between less reactive compound and highly reactive ones for summer and winter months, it was found that photochemical reactivity affects relative concentration of reactive compound. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2603 / 2614
页数:12
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