西安市夏末秋初PM_(2.5)中碳组分分析

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西安市夏末秋初PM_(2.5)中碳组分分析

张承中, 马文静, 李勇, 韩德明, 代志光, 李文韬, 韩婧

文章导航 > 环境工程 > 2015 > 33(5): 95-99

张承中, 马文静, 李勇, 韩德明, 代志光, 李文韬, 韩婧. 西安市夏末秋初PM_(2.5)中碳组分分析[J]. 环境工程, 2015, 33(5): 95-99. doi: 10.13205/j.hjgc.201505020

引用本文:

张承中, 马文静, 李勇, 韩德明, 代志光, 李文韬, 韩婧. 西安市夏末秋初PM_(2.5)中碳组分分析[J]. 环境工程, 2015, 33(5): 95-99. doi: 10.13205/j.hjgc.201505020

Zhang Chengzhong, Ma Wenjing, Li Yong, Han Deming, Dai Zhiguang, Li Wentao, Han Jing. ANALYSIS OF CARBON COMPONENTS IN PM2. 5 DURING LATE SUMMER AND EARLY AUTUMN OF XI’AN CITY[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(5): 95-99. doi: 10.13205/j.hjgc.201505020

Citation:

Zhang Chengzhong, Ma Wenjing, Li Yong, Han Deming, Dai Zhiguang, Li Wentao, Han Jing. ANALYSIS OF CARBON COMPONENTS IN PM2. 5 DURING LATE SUMMER AND EARLY AUTUMN OF XI’AN CITY[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(5): 95-99. doi: 10.13205/j.hjgc.201505020

张承中, 马文静, 李勇, 韩德明, 代志光, 李文韬, 韩婧. 西安市夏末秋初PM_(2.5)中碳组分分析[J]. 环境工程, 2015, 33(5): 95-99. doi: 10.13205/j.hjgc.201505020

引用本文:

张承中, 马文静, 李勇, 韩德明, 代志光, 李文韬, 韩婧. 西安市夏末秋初PM_(2.5)中碳组分分析[J]. 环境工程, 2015, 33(5): 95-99. doi: 10.13205/j.hjgc.201505020

Zhang Chengzhong, Ma Wenjing, Li Yong, Han Deming, Dai Zhiguang, Li Wentao, Han Jing. ANALYSIS OF CARBON COMPONENTS IN PM2. 5 DURING LATE SUMMER AND EARLY AUTUMN OF XI’AN CITY[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(5): 95-99. doi: 10.13205/j.hjgc.201505020

Citation:

Zhang Chengzhong, Ma Wenjing, Li Yong, Han Deming, Dai Zhiguang, Li Wentao, Han Jing. ANALYSIS OF CARBON COMPONENTS IN PM2. 5 DURING LATE SUMMER AND EARLY AUTUMN OF XI’AN CITY[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(5): 95-99. doi: 10.13205/j.hjgc.201505020

西安市夏末秋初PM_(2.5)中碳组分分析

doi: 10.13205/j.hjgc.201505020

基金项目:

陕西省自然科学基金资助项目( 2007D20) ; 陕西省教育厅专项科研基金资助项目( 06JK268) ; 西安市大气污染因子监控系统建设项目。

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出版历程
- 刊出日期: 2015-05-22

ANALYSIS OF CARBON COMPONENTS IN PM2. 5 DURING LATE SUMMER AND EARLY AUTUMN OF XI’AN CITY

摘要: 2012年9月1日至30日利用大气气溶胶OC/EC在线分析仪在线分析了西安PM2.5中的OC、EC,并结合O3和紫外辐射数据(UV)进行了分析。结果表明:PM2.5、OC、EC、及O3的日均值分别为85.22,19.50,7.18,56.69μg/m3。PM2.5及其中OC、EC的日变化规律呈现"双峰"分布,OC、EC的日波动范围较PM2.5小,且OC的波动范围较EC大,OC、EC的相关性较高(R2=0.73)。PM2.5中TCA的平均比重为47.85%,是PM2.5的主要成分之一,TCA以OM为主,OM中SOC的平均比重高达54.76%,PM2.5中SOC的平均比重为21.25%,SOC和O3的相关性较高,表明研究期间西安市有机物光化学反应较重。1 d中10:00至19:00是PM2.5中SOC比重最高的时段且呈上升趋势,而PM2.5中TCA的变化规律则呈"W"型双峰分布。

Abstract: An on-line monitoring of OC，EC in PM2. 5 was done by OC/EC online analyzer from 1st to 30th September，2012 in Xi'an． O3 and UV were also monitored and analyzed． The results showed that the daily average concentration of PM2. 5 ， OC，EC，O3 was 85. 22，19. 50，7. 18 and 56. 69 μg /m3 ，respectively． The daily change rules of PM2. 5 ，OC and EC were present“bimodal”distribution，and the daily changes of OC and EC were both smaller than PM2. 5 ． Furthermore，OC had a larger fluctuation range than EC，while the relative correlation of them was high ( Ｒ2 = 0. 72899 ) ． TCA was the main component of PM2. 5 and could occupy 47. 85% ． The majority composition of TCA was OM，and the concentrations of SOC in the OM could be up to 54. 76% ． SOC and O3 showed a high correlation，which indicated that the organic photochemical reactions were relatively heavy during the study period in Xi' an． The proportions of SOC in PM2. 5 were highest during 10: 00am to 7: 00pm in a day，and did a increasing trend，The changes of TCA in the PM2. 5 were present“W shape” bimodal distribution．

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