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题名: Oxidative Capacity and Radical Chemistry in a Semi-arid and Petrochemical-industrialized City, Northwest China
作者: Jia, CH; Wang, YN; Li, YJ; Huang, T; Mao, XX; Mo, JY; Li, JX; Jiang, WYH; Liang, XX; Gao, H; Ma, JM
收录类别: SCIE
出版日期: 2018-06
刊名: AEROSOL AND AIR QUALITY RESEARCH
卷号: 18, 期号:2, 页码:1391-1404
出版者: TAIWAN ASSOC AEROSOL RES-TAAR
出版地: TAICHUNG COUNTY
英文摘要: Heavy ozone (O-3) pollution is often observed in chemically industrialized Lanzhou and other capital cities located in the semi-arid and mountainous provinces of northwestern China. There are large knowledge gaps regarding the relationship between radical budgets and photochemistry in these cities. To gain insights into this relationship, a photochemical box model based on the Master Chemical Mechanism (MCM v3.3) was applied to investigate oxidative capacity and radical chemistry in the city of Lanzhou. The budgets of ROx (OH + HO2 + RO2) radicals were quantified, and the initiation, propagation, and termination process of the diurnal variation in the ozone chemistry were examined. The MCM model was constrained by in situ measurements at two sampling sites in the city, one located in the City downtown area (S1) and the other in the heavy petrochemical industrial area (S2) in the western suburb of the City, characterized by significant differences in volatile organic compounds (VOCs) and NOx concentrations between the two sites. Results showed that during the high O-3 episodes in summer, OH initiation was dominated by the reaction of excited oxygen atoms O(D-1) with water and the photolysis of nitrous acid (HONO) at the S1 site. At the S2 site, the most important production of OH was the reaction of O(D-1) + H2O, followed by the reaction of O-3 with VOCs. HONO photolysis was mostly identified at 7:00-13:00 local time at the S2 site, which is less important than that at the S1 site during the daytime. The photolysis of HCHO and OVOCs (except for HCHO) were the primary sources contributing to the initiation of HO2 and RO2 radicals at both sites. Results also revealed that the ROx termination could be attributed to the reactions of ROx with NO and NO2. The self-reactions between radicals also played an essential role at the S2 site. Overall OH was found to be the predominant oxidant, and NO3 was a major oxidant in the nighttime chemistry in the city.
关键词: ROx radical ; Source ; Oxidative capacity ; Lanzhou ; MCM model
作者部门: [Jia, Chenhui ; Li, Yaojie ; Huang, Tao ; Mao, Xiaoxuan ; Wanyanhan Jiang ; Liang, Xiaoxue ; Gao, Hong ; Ma, Jianmin] Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Environm Pollut Predict & Control, Lanzhou 730000, Gansu, Peoples R China ; [Wang, Yanan] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China ; [Mo, Jingyue ; Li, Jixiang] Lanzhou Univ, Coll Atmospher Sci, Lanzhou 730000, Gansu, Peoples R China ; [Ma, Jianmin] Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China
通讯作者: Ma, JM (reprint author), Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Environm Pollut Predict & Control, Lanzhou 730000, Gansu, Peoples R China. ; Ma, JM (reprint author), Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China.
学科分类: Environmental Sciences & Ecology
文章类型: Article
所属项目编号: Gansu Province Science and Technology Program for Livelihood of the People [1503FCMA003] ; National Natural Science Foundation of China [41503089, 41371478, 41671460] ; Natural Science Foundation of Gansu Province of China [1506RJZA212] ; fundamental Research Funds for the Central Universities [lzujbky-2016-262]
所属项目名称: 国家自然科学基金项目 ; 中央高校基本科研业务费专项资金 ; 甘肃省自然科学基金计划
项目资助者: NSFC ; LZU ; GSSTD
语种: 英语
DOI: 10.4209/aaqr.2017.11.0506
ISSN号: 1680-8584
WOS记录号: WOS:000434011800004
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/196031
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Jia, CH,Wang, YN,Li, YJ,et al. Oxidative Capacity and Radical Chemistry in a Semi-arid and Petrochemical-industrialized City, Northwest China[J]. AEROSOL AND AIR QUALITY RESEARCH,2018,18(2):1391-1404.
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