Comparison study of sedimentary humic substances isolated from contrasting coastal marine environments by chemical and spectroscopic analysis

ISL OpenIR > 青海盐湖研究所知识仓储

	Comparison study of sedimentary humic substances isolated from contrasting coastal marine environments by chemical and spectroscopic analysis
	Zhang, Yaoling1,2 ; Du, Jinzhou 2; Ding, Xiuping1 ; Zhang, Fenfen 2
	2016-03-01
发表期刊	ENVIRONMENTAL EARTH SCIENCES
卷号	75 期号:5
关键词	Fulvic Acids Humic Acids Cp/mas C-13 Nmr Py-gc/ms Potentiometric Titration Sediments Estuary Continental Shelf Continental Slope
摘要	To gain a better understanding of the chemical structural composition and reactivity of sedimentary organic matter in coastal environments, the properties of sedimentary humic substances (HSs) isolated from contrasting coastal marine environments (i.e., salt marsh estuary, continental shelf, and continental slope) in China were investigated and compared. The complementary analytical approaches employed included elemental analysis, cross polarization magic angle spinning (CP/MAS)-C-13 nuclear magnetic resonance, pyrolysis-gas chromatography-mass spectrometry, and potentiometric titrations. The results indicate that HSs isolated from the salt marsh site in the Changjiang Estuary, which is strongly influenced by terrestrial river inputs, had the highest content of lignin-derived components, such as phenols and alkyl phenols, and acidic functional groups; HSs from the continental slope site in the South China Sea, which mainly originated from the inputs of marine algae and planktons, contained the highest level of aliphatic compounds, carbohydrates, and nitrogen-containing compounds; however, HSs from the continental shelf site in the East China Sea presented a mixture of both land and marine properties due to the influence of the two sources. Humic acids were found to contain comparatively more highly branched, long-chain aliphatic components but fewer oxygen-containing functional groups, such as carboxyl groups, and fewer sulfur-containing compounds than their fulvic acid counterparts. The total concentrations of proton binding sites and the structural characteristics of the studied HSs may provide insights into the migration and fate of HS-bound contaminants, such as heavy metals and organic pollutants, in coastal marine systems.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6307
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所盐湖资源综合利用工程技术中心
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 2.E China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yaoling,Du, Jinzhou,Ding, Xiuping,et al. Comparison study of sedimentary humic substances isolated from contrasting coastal marine environments by chemical and spectroscopic analysis[J]. ENVIRONMENTAL EARTH SCIENCES,2016,75(5).
APA	Zhang, Yaoling,Du, Jinzhou,Ding, Xiuping,&Zhang, Fenfen.(2016).Comparison study of sedimentary humic substances isolated from contrasting coastal marine environments by chemical and spectroscopic analysis.ENVIRONMENTAL EARTH SCIENCES,75(5).
MLA	Zhang, Yaoling,et al."Comparison study of sedimentary humic substances isolated from contrasting coastal marine environments by chemical and spectroscopic analysis".ENVIRONMENTAL EARTH SCIENCES 75.5(2016).