Chemical characterization of humic-like substances (HULIS) in PM2.5 in Lanzhou, China
文献类型：期刊论文
| 作者 | Tan, Jihua; Xiang, Ping; Zhou, Xueming; Duan, Jingchun; Ma, Yongliang; He, Kebin; Cheng, Yuan; Yu, Jianzhen; Querol, Xavier |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2016-12-15 |
| 卷号 | 573页码:1481-1490 |
| 关键词 | PM2.5 HULIS WSOC Lanzhou Haze |
| 英文摘要 | Evaporative light scattering detection (ELSD) was applied to quantify HULIS (humic-like substances) for the first time in 2012 winter and 2013 summer at an urban site in Lanzhou. Water soluble organic carbon (WSOC), water soluble inorganic ions, and carbonaceous species (OC/EC) were also analyzed. The results show that OM (Organic Matter = OC x 1.6, constituting 45.8% to PM2.5) was the most abundant species, followed by SNA (SO42- + NO3- + NH4+, constituting 23.4% to PM2.5). The chemical species were in the order of: OC > EC > SO42- > NO3- > NH4+ > Cl- > Ca2+ > K+. The annual average concentration of HULIS was 4.70 mu g/m(-3) and HULISc (carbon content of HULIS) contributed 6.19% to PM2.5 and 45.6% to WSOC, indicating that HULIS was the most important components of WSOC. The concentration of HULIS was 2.14 +/- 0.80 mu g/m(3) in summer and 7.24 +/- 2.77 mu g/m(3) in winter, respectively. The concentrations of HULIS were relatively low and stable in summer, while high and varied dramatically in winter. The abundance of HULISc in WSOC shows a more concentrated distribution in Lanzhou, with a range between 0.28-057. The ratios of HULIS/K+ were 6.25 +/- 1.41 and 6.14 +/- 1.96 in summer and winter, respectively, suggesting there were other significant sources in addition to biomass burning emissions. HULIS and WSOC exhibited similar seasonal variation and had a strong positive correlation. In addition to the good relationship (0.89) between HULIS and Cl- in winter, the great enhancement of HULIS with significantly high Cl- and relatively low K+ in winter indicated that residential coal burning was probably an important HULIS source in winter. Correlation and back trajectory analysis suggested that biomass burning and secondary formation were also important HULIS sources and the contribution of HULLS from dust could be neglected. Adverse meteorological conditions were also important factors for the accumulation of HULIS in winter. (C) 2016 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35703]  |
| 专题 | 生态环境研究中心_大气环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Tan, Jihua,Xiang, Ping,Zhou, Xueming,et al. Chemical characterization of humic-like substances (HULIS) in PM2.5 in Lanzhou, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2016,573:1481-1490. |
| APA | Tan, Jihua.,Xiang, Ping.,Zhou, Xueming.,Duan, Jingchun.,Ma, Yongliang.,...&Querol, Xavier.(2016).Chemical characterization of humic-like substances (HULIS) in PM2.5 in Lanzhou, China.SCIENCE OF THE TOTAL ENVIRONMENT,573,1481-1490. |
| MLA | Tan, Jihua,et al."Chemical characterization of humic-like substances (HULIS) in PM2.5 in Lanzhou, China".SCIENCE OF THE TOTAL ENVIRONMENT 573(2016):1481-1490. |
入库方式： OAI收割
来源：生态环境研究中心
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