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DOI | 10.5194/acp-18-10407-2018 |
Chemical characterization of laboratory-generated tar ball particles | |
Toth, Adam1; Hoffer, Andras2; Posfai, Mihaly1; Ajtai, Tibor3; Konya, Zoltan4,5; Blazso, Marianne6; Czegeny, Zsuzsanna6; Kiss, Gyula2; Bozoki, Zoltan3; Gelencser, Andras1,2 | |
2018-07-23 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:14页码:10407-10418 |
文章类型 | Article |
语种 | 英语 |
国家 | Hungary |
英文摘要 | The chemical properties of laboratory-generated tar ball (Lab-TB) particles produced from dry distillate (wood tars) of three different wood species in the laboratory were investigated by analytical techniques that had never been used before for their characterization. The elemental compositions of laboratory-generated tar balls (Lab-TBs) from three tree species were very similar to one another and to those characteristic of atmospheric tar balls (TBs) collected from the savanna fire during the SAFARI 2000 sampling campaign. The O / C and H / C molar ratios of the generated Lab-TBs were at the upper limit characteristic of soot particles. The Fourier transform infrared spectroscopy (FTIR) spectra of the generated Lab-TBs were very similar to one another as well and also showed some similarity with those of atmospheric humic-like substances (HULIS). The FT-IR measurements indicated that Lab-TBs have a higher proportion of aromatic structure than HULIS and the oxygen atoms of Lab-TBs are mainly found in hydroxyl and keto functional groups. Whereas Raman activity was detected in the starting materials of the Lab-TBs (wood tars) in the range of 1000-1800 cm(-1), the Raman spectra of TBs were dominated by two pronounced bands with intensity maxima near 1580 (G band) and 1350 cm(-1) (D band), indicating the presence of sp(2)-hybridized carbon structures and disorder in them, respectively. In the Py-GC-MS chromatograms of the Lab-TBs mostly aromatic compounds (aromatic hydrocarbons, oxygenated aromatics and heterocyclic aromatics) were identified in accordance with the results of Raman and FT-IR spectroscopy. According to organic carbon / elemental carbon (OC / EC) analysis using EUSAAR_2 thermal protocol, 22% of the total carbon content of Lab-TBs was identified as EC, contrary to expectations based on the current understanding that negligible if any EC is present in this sub-fraction of the brown carbon family. Our results suggest that spherical atmospheric TBs with high C / O molar ratios are closer to BC in many of their properties than to weakly absorbing HULIS. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439427800002 |
WOS关键词 | INDIVIDUAL AEROSOL-PARTICLES ; INVERSE DIFFUSION FLAME ; HUMIC-LIKE SUBSTANCES ; BROWN CARBON ; ATMOSPHERIC AEROSOL ; SOUTHERN AFRICA ; BLACK CARBON ; SOOT ; BIOMASS ; QUANTIFICATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26189 |
专题 | 地球科学 |
作者单位 | 1.Univ Pannonia, Dept Earth & Environm Sci, POB 158, H-8201 Veszprem, Hungary; 2.MTA PE Air Chem Res Grp, POB 158, H-8201 Veszprem, Hungary; 3.MTA SZTE Res Grp Photoacoust Spect, Dom Ter 9, H-6720 Szeged, Hungary; 4.Univ Szeged, Dept Appl & Environm Chem, Rerrich Bela Ter 1, H-6720 Szeged, Hungary; 5.MTA SZTE React Kinet & Surface Chem Res Grp, Rerrich Bela Ter 1, H-6720 Szeged, Hungary; 6.MTA TTK Inst Mat & Environm Chem, POB 286, H-1519 Budapest, Hungary |
推荐引用方式 GB/T 7714 | Toth, Adam,Hoffer, Andras,Posfai, Mihaly,et al. Chemical characterization of laboratory-generated tar ball particles[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(14):10407-10418. |
APA | Toth, Adam.,Hoffer, Andras.,Posfai, Mihaly.,Ajtai, Tibor.,Konya, Zoltan.,...&Gelencser, Andras.(2018).Chemical characterization of laboratory-generated tar ball particles.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(14),10407-10418. |
MLA | Toth, Adam,et al."Chemical characterization of laboratory-generated tar ball particles".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.14(2018):10407-10418. |
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