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Comparison study of sedimentary humic substances isolated from contrasting coastal marine environments by chemical and spectroscopic analysis
Zhang, Yaoling1,2; Du, Jinzhou2; Ding, Xiuping1; Zhang, Fenfen2
2016-03-01
Source PublicationENVIRONMENTAL EARTH SCIENCES
Volume75Issue:5
SubtypeArticle
AbstractTo 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.
KeywordFulvic Acids Humic Acids Cp/mas C-13 Nmr Py-gc/ms Potentiometric Titration Sediments Estuary Continental Shelf Continental Slope
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
WOS KeywordPOLYCYCLIC AROMATIC-HYDROCARBONS ; NATURAL ORGANIC-MATTER ; NMR-SPECTROSCOPY ; MOLECULAR COMPOSITION ; SURFACE SEDIMENTS ; SOURCE INDICATORS ; HAINAN ISLAND ; FULVIC-ACIDS ; MULTI-PROXY ; SALT-MARSH
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology ; Geology ; Water Resources
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000372171700018
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6307
Collection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
Affiliation1.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
Recommended Citation
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).
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