Radiocarbon-based impact assessment of open biomass burning on regional carbonaceous aerosols in North China

被引：47

作者：

Zong, Zheng ^{[1
,3
]}

Chen, Yingjun ^{[1
]}

Tian, Chongguo ^{[1
]}

Fang, Yin ^{[1
]}

Wang, Xiaoping ^{[2
,3
]}

Huang, Guopei ^{[1
]}

Zhang, Fan ^{[1
]}

Li, Jun ^{[2
]}

Zhang, Gan ^{[2
]}

机构：

[1] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Processes & Ecol Remedia, Yantai 264003, Peoples R China

[2] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2015年 / 518卷

关键词：

Radiocarbon (C-14) tracer; Organic carbon; Elemental carbon; Open crop residue burning; SOURCE APPORTIONMENT; SOUTH CHINA; ELEMENTAL CARBON; BACKGROUND SITE; ORGANIC-CARBON; HAZE EVENTS; RURAL SITE; BOHAI RIM; PM2.5; POLLUTION;

D O I：

10.1016/j.scitotenv.2015.01.113

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Samples of total suspended particulates (TSPs) and fine particulate matter (PM2.5) were collected from 29th May to 1st July, 2013 at a regional background site in Bohai Rim, North China. Mass concentrations of particulate matter and carbonaceous species showed a total of 50% and 97% of the measured TSP and PM2.5 levels exceeded the first grade national standard of China, respectively. Daily concentrations of organic carbon (OC) and elemental carbon (EC) were detected 7.3 and 2.5 mu g m (3) in TSP and 5.2 and 2.0 mu g m (3) in PM2.5, which accounted 5.8% and 2.0% of TSP while 5.6% and 2.2% for PM2.5, respectively. The concentrations of OC, EC, TSP and PM2.5 were observed higher in the day time than those in the night time. The observations were associated with the emission variations from anthropogenic activities. Two merged samples representing from south and north source areas were selected for radiocarbon analysis. The radiocarbon measurements showed 74% of water-insoluble OC (WINSOC) and 59% of EC in PM2.5 derived from biomass burning and biogenic sources when the air masses were from south region, and 63% and 48% for the air masses from north, respectively. Combined with backward trajectories and daily burned area, open burning of agricultural wastes was found to be predominating, which was confirmed by the potential source contribution function (PSCF). (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：1 / 7

页数：7

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