頁籤選單縮合
題名 | 新竹縣大氣VOCs檢測與臭氧產生潛勢分析=Ambient VOCs and Ozone Formation Potential in Hsin-Chu County |
---|---|
作者 | 華梅英; 巫健次; 殷志鴻; 顏有利; 張秀慧; | 書刊名 | 東南學報 |
卷期 | 34 2009.07[民98.07] |
頁次 | 頁185-195 |
分類號 | 445.63 |
關鍵詞 | 揮發性有機物; 新竹縣; 空氣品質; 臭氧產生潛勢; 最大增量反應; Volatile organic compounds; VOCs; Hsin-Chu county; Air quality; Ozone formation potential; Maximum increment reactivity; MIR; |
語文 | 中文(Chinese) |
中文摘要 | 摘 要 本研究分別於2008年5月9日及9月26日,在新竹縣五處測點進行二次大氣中揮發性 有機物(VOCs)採樣分析,其方法依據環保署NIEA A715.12B 之不鏽鋼瓶採樣及 GC/MS 分析,檢測VOCs 物種共計59項。五處測點包括工業區、加油站、商業區及湖 口站(環保署工業區測站位於信勢國小)與竹東站 (環保署一般測站位於大同國小),以 比較各處同時間之濃度差異性。此外本研究亦利用最大增量反應(MIR)方式評估各處臭 氧產生潛勢。 由研究結果顯示,測點中以商業區的VOCs 總濃度最高,污染物主要為乙烯、乙 炔、甲苯、乙烷、MTBE 及異戊烷等;以竹東站總濃度最低,主要物種為乙烷、丙 烷、甲苯等。各測點前十大VOCs 物種濃度佔全量至少60%以上比例,大多數污染物 種VOCs 之高濃度值出現在上午7-8時之間,明顯受交通尖峰之影響。將VOCs 濃度依 類別區分,由高至低分別為烷類、烯類、苯類、醚類,前二者分別佔約四至八成與二 至三成,比較而言商業區之烷類較低,加油站及商業區之醚類較高。在臭氧產生潛勢 方面,潛勢值以商業區平均6700μg O3最高、二處測站較低平均為330μg O3,主要 因商業區VOCs 中以MIR 高之物種濃度較高,如1,2,4-三甲苯、乙烯、二甲苯及丙烯等 物質。在臭氧貢獻比例上,以烯類與苯類貢獻量最多,合計約為七至八成。 |
英文摘要 | Abstract In this study concentrations of volatile organic compounds (VOCs) were measured on May 9 and September 26, 2008 in the Hsinchu County at five sampling sites in order to compare the background concentration between them. The five sites included industrial area, gas station, shopping center and two Environmental Protecting Administration’s (EPA’s) monitoring stations—Jhudong and Hukou, which located at Xinshi and Datong primary school. About 59 species were measured and the testing method followed the NIEA A715.12B, announcing by EPA, which samples are collected by canisters and analyzed by GC/MS. The Maximum Incremental Reactivity (MIR) were used to estimate photochemical ozone formation potential. The results showed that shopping center has the highest concentration and acetylene is the most abundant VOC, followed by acetylene, toluene, ethane, MTBE and isopentane; EPA’s Jhudong monitoring station has the lowest concentration and the main species are ethane, propane and toluene. Top ten species accounted for more than 60% quantity of VOCs and the high concentration appears among 7- 8 o’clock in the morning, which is probably effected by traffic-emission. The VOCs’s main compositions in terms of the carbon bond classification are paraffin and olefins which assigning about 40-80% and 20-30%, respectively. MTBE concentration at Gas station and shopping center are higher than other place. It was found that shopping center has the highest ozone formation potential, about 6700μgO3, because of the high concentration of the high MIR species as 1,2,4-trimethylbenzene, ethylene, xylene and propylene; two EPA’s monitoring stations have the lowest ozone formation potential averaging about 330μg O3. The main contribution of ozone with carbon bond classification are olefins and benzene, which is about 70-80% |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。