A multi-proxy study of sedimentary humic substances in the salt marsh of the Changjiang Estuary, China

ISL OpenIR > 青海盐湖研究所知识仓储

	A multi-proxy study of sedimentary humic substances in the salt marsh of the Changjiang Estuary, China
	Zhang, Yaoling1,2 ; Du, Jinzhou 1; Zhao, Xin 3; Wu, Wangsuo 4; Peng, Bo 3; Zhang, Jing 1
	2014-12-05
发表期刊	ESTUARINE COASTAL AND SHELF SCIENCE
卷号	151 页码:295-301
关键词	Fulvic Acids Humic Acids Sediments Salt Marshes Changjiang Estuary
摘要	To better understand the origin, composition, and reactivity of sedimentary humic substances (HSs) in salt marshes in the Changjiang Estuary, HS samples were isolated from a sediment core that was collected from the Eastern Chongming salt marsh. Chemical and spectroscopic methods were used to analyze the features of these HSs. The results indicate that the studied HSs in the salt marsh sediments are mainly terrestrial-derived and that the sedimentary organic matter (SUM) in the top layer may contain more organic matter from marine sources and/or autochthonous materials due to the dramatic decreasing of the sediment supply as a result of damming. The degradation of labile carbohydrates and proteins and the preservation of refractory lignin components dominate the early diagenetic reactions of SUM in the salt marsh area. The average contents of the carboxylic groups in FAs and HAs are 11.64 +/- 1.08 and 7.13 +/- 0.16 meq/gC, and those of phenolic groups are 1.95 +/- 0.13 and 2.40 +/- 0.44 meq/gC, respectively. The content of carboxylic groups increased with increasing depth, while there were no obvious changes in the content of phenolic groups. The average concentration of total proton-binding sites is approximately 12.5 mu mol/g sediment for the studied HSs. These values may provide insight into the migration and fate of HS-bound contaminants in sediments and the overlying sea water in the salt marsh areas of the Changjiang Estuary. (C) 2014 Elsevier Ltd. All rights reserved.
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/363002/5658
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.E China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China 2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China 3.E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China 4.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yaoling,Du, Jinzhou,Zhao, Xin,et al. A multi-proxy study of sedimentary humic substances in the salt marsh of the Changjiang Estuary, China[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2014,151:295-301.
APA	Zhang, Yaoling,Du, Jinzhou,Zhao, Xin,Wu, Wangsuo,Peng, Bo,&Zhang, Jing.(2014).A multi-proxy study of sedimentary humic substances in the salt marsh of the Changjiang Estuary, China.ESTUARINE COASTAL AND SHELF SCIENCE,151,295-301.
MLA	Zhang, Yaoling,et al."A multi-proxy study of sedimentary humic substances in the salt marsh of the Changjiang Estuary, China".ESTUARINE COASTAL AND SHELF SCIENCE 151(2014):295-301.