Chemical characterization of fractions of dissolved humic substances from a marginal sea-a case from the Southern Yellow Sea

CORC > 青海盐湖研究所 > 中国科学院青海盐湖研究所 > 青海盐湖研究所知识仓储

	Chemical characterization of fractions of dissolved humic substances from a marginal sea-a case from the Southern Yellow Sea
	Zhang Yaoling 1,2; Yang Keli 1; Du Jinzhou 2; Zhang Fenfen 2; Dong Yaping 1; Li Wu 1
刊名	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2018-03-01
卷号	36 期号:2 页码:238-248
关键词	Seawater Fulvic Acid Humic Acid The Xad-4 Fraction Nmr Py-gc/ms
文献子类	Article
英文摘要	Marine dissolved organic matter (DOM) is one of the largest dynamic pools of organic carbon in the global carbon cycle, yet DOM is still chemically poorly characterized. To better understand the origin, composition, and cycling of DOM in the China marginal sea, dissolved humic substances (DHS) were isolated from seawaters in two locations in the Southern Yellow Sea. The DHS were subdivided into fulvic acids (FAs), humic acids (HAs) and the XAD-4 fractions. Complementary analytical approaches were used to characterize the isolated DHS samples including stable carbon isotopic composition, Fourier transform infrared spectroscopy (FTIR), C-13 cross polarization magic angle spinning (CP/MAS) nuclear magnetic resonance (NMR), and pyrolysis gas chromatography-mass spectrometry (Py-GC/MS). The results demonstrated that both DHS samples encountered the influences from marine source, indicating that algal and microbial-derived materials are the predominant precursors for the studied samples. The three fractions of DHS showed different properties. FAs presented more aromatic features, whereas HAs contained more aliphatic lipids and proteinaceous materials. The XAD-4 fractions were enriched in C-13 and contained more carbohydrates but less aromatic compounds. The lower molecular weight and higher heteroatom content and number of carboxyl groups for the XAD-4 fractions may give them considerable geochemical significance for aspects of trace metal species, bioavailability of pollutants, mineral weathering and water acidification in marine environments.
WOS关键词	NUCLEAR-MAGNETIC-RESONANCE ; STABLE CARBON-ISOTOPE ; SOLID-STATE NMR ; ORGANIC-MATTER ; MASS-SPECTROMETRY ; EXTRACTION TECHNIQUES ; PREPARATIVE ISOLATION ; HAINAN ISLAND ; MULTI-PROXY ; FRESH-WATER
WOS研究方向	Marine & Freshwater Biology ; Oceanography
语种	英语
WOS记录号	WOS:000431662200005
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/6463]
专题	青海盐湖研究所_青海盐湖研究所知识仓储青海盐湖研究所_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, Qinghai, Peoples R China 2.East 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,Yang Keli,Du Jinzhou,et al. Chemical characterization of fractions of dissolved humic substances from a marginal sea-a case from the Southern Yellow Sea[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2018,36(2):238-248.
APA	Zhang Yaoling,Yang Keli,Du Jinzhou,Zhang Fenfen,Dong Yaping,&Li Wu.(2018).Chemical characterization of fractions of dissolved humic substances from a marginal sea-a case from the Southern Yellow Sea.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,36(2),238-248.
MLA	Zhang Yaoling,et al."Chemical characterization of fractions of dissolved humic substances from a marginal sea-a case from the Southern Yellow Sea".JOURNAL OF OCEANOLOGY AND LIMNOLOGY 36.2(2018):238-248.