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Chemical characterization of fractions of dissolved humic substances from a marginal sea-a case from the Southern Yellow Sea
Zhang Yaoling1,2; Yang Keli1; Du Jinzhou2; Zhang Fenfen2; Dong Yaping1; Li Wu1
2018-03-01
Source PublicationJOURNAL OF OCEANOLOGY AND LIMNOLOGY
Volume36Issue:2Pages:238-248
SubtypeArticle
AbstractMarine 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.
KeywordSeawater Fulvic Acid Humic Acid The Xad-4 Fraction Nmr Py-gc/ms
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
WOS KeywordNUCLEAR-MAGNETIC-RESONANCE ; STABLE CARBON-ISOTOPE ; SOLID-STATE NMR ; ORGANIC-MATTER ; MASS-SPECTROMETRY ; EXTRACTION TECHNIQUES ; PREPARATIVE ISOLATION ; HAINAN ISLAND ; MULTI-PROXY ; FRESH-WATER
Indexed BySCI
Language英语
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000431662200005
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6463
Collection青海盐湖研究所知识仓储
盐湖资源综合利用工程技术中心
Affiliation1.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
Recommended Citation
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.
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