Chemical characteristics and source apportionment of PM2.5 during the   harvest season in eastern China&apos;s agricultural regions

doi:10.1016/j.atmosenv.2014.04.058

CORC > 北京大学 > 环境科学与工程学院

	Chemical characteristics and source apportionment of PM2.5 during the harvest season in eastern China's agricultural regions
	Li, Jianfeng ; Song, Yu ; Mao, Yi ; Mao, Zhichun ; Wu, Yusheng ; Li, Mengmeng ; Huang, Xin ; He, Qichao ; Hu, Min
刊名	大气环境
	2014
关键词	Wheat residue burning Harvest season PM2.5 Chemical compositions Source apportionment ON-ROAD VEHICLES AIR-QUALITY FILTER PACK AMBIENT AIR GAS-PHASE BIOMASS EMISSIONS PARTICULATE CHLORINE COMBUSTION
DOI	10.1016/j.atmosenv.2014.04.058
英文摘要	To determine the contribution of the open burning of wheat straw residues to local PM2.5 during the harvest season of June 2013, PM2.5 was sampled in an agricultural region in eastern China. The sampling site was approximately 1 km from the nearest wheat field. Chemical compositions were analyzed, and source apportionment was undertaken using the positive matrix factorization model. The average PM2.5 concentration was 110.7 mu g/m(3), containing 36.4 mu g/m(3) organics, 7.3 mu g/m(3) EC, 6.0 mu g/m(3) potassium (K) and 4.9 mu g/m(3) chloride ion (Cl-). The sampling period was divided into three phases: the pre-local-burning phase (Phase 1), the local-burning phase (Phase 2) and the post-local-burning phase (Phase 3). In Phase 2, the concentrations of PM2.5 and the organics, EC, K and Cl- in PM2.5 were 163.6 mu g/m(3), 59.0 mu g/m(3), 12.2 mu g/m(3), 11.0 mu g/m(3) and 10.8 mu g/m(3), respectively, which were all remarkably higher than in both Phase 1 and Phase 3. Eight sources of PM2.5 were determined, including two types of wheat residue burning sources, which showed a significant difference in Cl- content. The atmospheric relative humidity (RH) and the aging process of PM2.5 might be the causes: only fresh particulate emissions from wheat residue burning could feature high-concentration Cl- under high RH conditions. In Phase 2, wheat residue burning contributed 51.3% of PM2.5, 75.8% of OC, 74.5% of EC, 90.1% of K and 104.1% of Cl-. These percentages were lower in Phases 1 and 3 than in Phase 2. Wheat residue burning caused such severe air pollution that it's necessary to prohibit the open burning of crop residues in order to protect public health and the environment. (C) 2014 Published by Elsevier Ltd.; Environmental Sciences; Meteorology & Atmospheric Sciences; SCI(E); EI; 3; ARTICLE; songyu@pku.edu.cn; minhu@pku.edu.cn; 442-448; 92
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/210597]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Li, Jianfeng,Song, Yu,Mao, Yi,et al. Chemical characteristics and source apportionment of PM2.5 during the harvest season in eastern China's agricultural regions[J]. 大气环境,2014.
APA	Li, Jianfeng.,Song, Yu.,Mao, Yi.,Mao, Zhichun.,Wu, Yusheng.,...&Hu, Min.(2014).Chemical characteristics and source apportionment of PM2.5 during the harvest season in eastern China's agricultural regions.大气环境.
MLA	Li, Jianfeng,et al."Chemical characteristics and source apportionment of PM2.5 during the harvest season in eastern China's agricultural regions".大气环境 (2014).