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DOI	10.1016/j.molstruc.2021.132043
	Molecular structure characterization of coal under the water-rock interaction in acid mine drainage (AMD)
	Liwei, Zheng; Dong, Shuning; Tang, Shengli; Ji, Yadong; Luo, Jinzhi; Li, Huahua; Li, Xiaolong; Liu, Chiyang; Zeng, Mengli
通讯作者	Liwei, Z (通讯作者)，Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Peoples R China.
发表日期	2022
ISSN	0022-2860
EISSN	1872-8014
卷号	1251
英文摘要	AMD weakens the compressive strength of coal pillar and threatens the safety of coal mine production. In order to study the effect of AMD on coal, this paper uses X-ray diffraction (XRD) and Fourier transform infrared (FTIR) test techniques to detect the molecular structure of coal samples treated with different immersion acidity and immersion time. The results show that with the increase of soaking acidity and soaking time, the layer spacing (d(002)) from 0.349 to 0.353 and L-a from 55.719 to 57.420 nm, showing a positive correlation; L-c from 1.85 to 1.66 nm and N from 5.31 to 4.71, showing a negative correlation. It shows that the original microcrystalline structure in the coal sample changes due to the chemical reaction of organic matter, the spacing and average diameter of the microcrystalline layers increase, the average height and the number of carbon layers decrease, and the degree of order gradually decreases. Aromatic hydrogen(f(ar)(H)), aromatic carbon(f(ar)(c)), the relative abundance of aromatic and aliphatic functional groups(I) and A(CH2)/A(CH3) gradually decrease, degree of condensation (DOC) and oxygen-containing structural('C') gradually increase. The research results show the molecular structure characteristics of coal in AMD water-rock interaction, and provide a reference for studying the macroscopic characteristics of coal under the action of AMD. (C) 2021 Elsevier B.V. All rights reserved.
关键词	RAMAN FTIR SPECTROSCOPY NMR XRD
英文关键词	Coal; Molecular structure; Water-rock interaction; XRD; FTIR; Acid mine drainage
语种	英语
WOS研究方向	Chemistry
WOS类目	Chemistry, Physical
WOS记录号	WOS:000744668700003
来源期刊	JOURNAL OF MOLECULAR STRUCTURE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/255091
作者单位	[Liwei, Zheng; Dong, Shuning; Tang, Shengli; Luo, Jinzhi; Li, Xiaolong; Zeng, Mengli] Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Peoples R China; [Liwei, Zheng; Dong, Shuning; Tang, Shengli; Ji, Yadong; Li, Xiaolong; Zeng, Mengli] China Coal Technol & Engn Grp Corp, Xian Res Inst, Xian 710054, Peoples R China; [Liwei, Zheng; Dong, Shuning; Luo, Jinzhi; Li, Xiaolong] Shaanxi Prov Key Lab Geol Support Coal Green Expl, Xian 710054, Shaanxi, Peoples R China; [Liu, Chiyang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Liu, Chiyang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Li, Huahua] Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China
推荐引用方式 GB/T 7714	Liwei, Zheng,Dong, Shuning,Tang, Shengli,et al. Molecular structure characterization of coal under the water-rock interaction in acid mine drainage (AMD)[J]. 中国科学院西北生态环境资源研究院,2022,1251.
APA	Liwei, Zheng.,Dong, Shuning.,Tang, Shengli.,Ji, Yadong.,Luo, Jinzhi.,...&Zeng, Mengli.(2022).Molecular structure characterization of coal under the water-rock interaction in acid mine drainage (AMD).JOURNAL OF MOLECULAR STRUCTURE,1251.
MLA	Liwei, Zheng,et al."Molecular structure characterization of coal under the water-rock interaction in acid mine drainage (AMD)".JOURNAL OF MOLECULAR STRUCTURE 1251(2022).