Variations of concentration and composition of polycyclic aromatichydrocarbons in coals in response to dike intrusion in the Huainancoalfield in eastern China
Wang,RW(Wang,Ruwei)[1,2]; Liu,GJ(Liu,Guijian)[1,2]
2015-06
发表期刊Organic Geochemistry
卷号83-84页码:202-214
文章类型期刊论文
摘要

Although extensive studies have been conducted on coals influenced by igneous intrusion, the changes of concentration and composition of polycyclic aromatic hydrocarbons (PAHs) in coals responding to this kind of geological rapid heating are largely unknown. In the present study, thirteen coal samples, including unaltered coal, thermally altered coal and a dike-coal contact sample were collected along a transect approaching an igneous dike intrusion from the No. 3 coal seam of the Zhuji coal mine in Huainan coalfield, China. These samples represent a broad range of coal ranks ranging from high volatile A bituminous to anthracite. Vitrinite reflectance (%Ro) profiles indicate a progressive increase in %Ro value from ambient levels of 0.87–1.02% to 5.16% and include an alteration occurring out to 3.6 m from the dike. Bulk chemical composition from proximate and ultimate analyses shows the typical trend with distance from the dike. The total amount of extractable PAHs (RPAH35), US-EPA priority pollutant PAHs (RPAH16) and carcinogenic PAHs (RPAH8) range from 3.4–81.1 lg/g, 2.5–28.7 lg/g and 0.7–16.9 lg/g, respectively. PAH concentrations vary regularly with coal rank, reaching a maximum in low volatile bituminous coal (1.62 %Ro), located 3.5 m from the dike. This rank is higher than reported for coals not affected by contact metamorphism. Contact metamorphism has a dramatic effect on the coalification process and results in a different relationship between the PAH maximum concentration and coal rank. The igneous dike intrusion also has a significant effect on PAH distributions, where the proportions of 4–6 ring PAHs decrease toward the coal-dike contact and PAHs are dominated by those with 2 and 3 rings. The thermally altered coals show a decrease in alkylation compared with that of the unaltered coals, and the dealkylation process is apparently accompanied by the cross linking reaction of PAHs to form a more compact structure of organic macromolecule.

关键词Coal Rank Polycyclic Aromatic Hydrocarbons Coalification Dike Intrusion Huainan Coalfield
DOI10.1016/j.orggeochem.2015.03.014
收录类别SCI
语种英语
引用统计
被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9542
专题黄土与第四纪地质国家重点实验室(2010~)
作者单位1.CAS Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;
2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, The Chinese Academy of Sciences, Xi’an 710075, Shaanxi, China
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Wang,RW,Liu,GJ. Variations of concentration and composition of polycyclic aromatichydrocarbons in coals in response to dike intrusion in the Huainancoalfield in eastern China[J]. Organic Geochemistry,2015,83-84:202-214.
APA Wang,RW,&Liu,GJ.(2015).Variations of concentration and composition of polycyclic aromatichydrocarbons in coals in response to dike intrusion in the Huainancoalfield in eastern China.Organic Geochemistry,83-84,202-214.
MLA Wang,RW,et al."Variations of concentration and composition of polycyclic aromatichydrocarbons in coals in response to dike intrusion in the Huainancoalfield in eastern China".Organic Geochemistry 83-84(2015):202-214.
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