DOI: 10.1016/j.atmosenv.2014.04.058
Scopus记录号: 2-s2.0-84899918496
论文题名: Chemical characteristics and source apportionment of PM2.5 during the harvest season in eastern China's agricultural regions
作者: Li J ; , Song Y ; , Mao Y ; , Mao Z ; , Wu Y ; , Li M ; , Huang X ; , He Q ; , Hu M
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 92 起始页码: 442
结束页码: 448
语种: 英语
英文关键词: Chemical compositions
; Harvest season
; Source apportionment
; Wheat residue burning
Scopus关键词: Agricultural wastes
; Chlorine compounds
; Public health
; Chemical characteristic
; Chemical compositions
; Chloride ions
; Harvest season
; Positive matrix factorization models
; Sampling period
; Sampling site
; Source apportionment
; Harvesting
; chloride
; ion
; potassium
; aging
; agricultural land
; agricultural procedures
; air pollution
; air quality
; analysis
; article
; burn
; chemical composition
; China
; harvest
; laboratory
; particulate matter
; plant residue
; priority journal
; season
; wheat
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
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 1km 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 110.7μg/m3, containing 36.4μg/m3 organics, 7.3μg/m3 EC, 6.0μg/m3 potassium (K) and 4.9μg/m3 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 163.6μg/m3, 59.0μg/m3, 12.2μg/m3, 11.0μg/m3 and 10.8μg/m3, 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. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81230
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Joint Laboratory of Environmental Simulation and Pollution Control, Department of Environmental Science, Peking University, Beijing 100871, China
Recommended Citation:
Li J,, Song Y,, Mao Y,et al. Chemical characteristics and source apportionment of PM2.5 during the harvest season in eastern China's agricultural regions[J]. Atmospheric Environment,2014-01-01,92