Characterization of humic-like substances in PM2.5 during biomass burning episodes on Weizhou Island, China
文献类型：期刊论文
| 作者 | Duan, Jingchun; Hu, Jingnan; Mao, Jingyin; Zhang, Kai; Tan, Jihua; Zhang, Leiming; Zhou, Xueming |
| 刊名 | ATMOSPHERIC ENVIRONMENT
 |
| 出版日期 | 2018-10-01 |
| 卷号 | 191页码:258-266 |
| ISSN号 | 1352-2310 |
| 关键词 | Atmospheric aerosols Humic-like substances Chemically-resolved PM2.5 Emission sources Background region |
| 文献子类 | Article |
| 英文摘要 | To investigate chemical characteristics and sources of humic-like substances (HULIS) in the background region of Southwest China, daily PM2.5 samples were collected on Weizhou Island from 14 March 2015 to 14 April 2015. Water soluble inorganic ions, organic carbon (OC), elemental carbon (EC), water-soluble organic carbon (WSOC), HULIS, oxalate, levoglucosan and mannosan were analyzed. Average concentration of PM2.5 was 32.5 +/- 12.6 mu g/m(3) with SO42-, OC and NH4+ as the three most abundant components. Average concentration of HUMS was 5.00 +/- 2.21 mu g/m(3) with daily values ranged from 1.46 to 10.36 mu g/m(3). The carbon content of HULIS (HULIS-C) contributed 35.6% +/- 7.2% of OC and 76.8% +/- 12.9% of WSOC, indicating HULIS-C as one of the most important species in OC and WSOC in this region. The concentration of HULIS correlated well with those of non-sea salt (nss)K+, levoglucosan, oxalate, OC, EC, WSOC, SOC and WSOC/OC, suggesting dominant source factors from both biomass burning and secondary aerosol formation. Contributions from crust and sea salt source factors to HULIS were minimal as indicated by its poor correlation with nss-Ca2+, Mg2+ and Na2+. Research flight observations showed increasing biomass-burning indicators with increasing altitude, likely due to aerosols produced from biomass burning in Southeast Asia, which were then uplifted by deep convection to the middle troposphere and transported to this area. This hypothesis was supported by negative correlations between HULIS and sea level pressure when high-altitude air masses were transported from the Southeast Asian. Air mass backward trajectory analysis suggested Southeast Asian as the dominant source region for HULIS on Weizhou Island. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40492]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Duan, Jingchun,Hu, Jingnan,Mao, Jingyin,et al. Characterization of humic-like substances in PM2.5 during biomass burning episodes on Weizhou Island, China[J]. ATMOSPHERIC ENVIRONMENT,2018,191:258-266. |
| APA | Duan, Jingchun.,Hu, Jingnan.,Mao, Jingyin.,Zhang, Kai.,Tan, Jihua.,...&Zhou, Xueming.(2018).Characterization of humic-like substances in PM2.5 during biomass burning episodes on Weizhou Island, China.ATMOSPHERIC ENVIRONMENT,191,258-266. |
| MLA | Duan, Jingchun,et al."Characterization of humic-like substances in PM2.5 during biomass burning episodes on Weizhou Island, China".ATMOSPHERIC ENVIRONMENT 191(2018):258-266. |
入库方式： OAI收割
来源：生态环境研究中心
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