Behavior of uranium in the Yellow River plume (Yellow river estuary)

	Behavior of uranium in the Yellow River plume (Yellow river estuary)
	Jiang, Xueyan 1; Yu, Zhigang 1; Ku, Teh-Lung 2; Kang, Xinglun 3; Wei, Wei 4; Chen, Hongtao 1
	2007-12-01
发表期刊	ESTUARIES AND COASTS
ISSN	1559-2723
卷号	30 期号:6 页码:919-926
文章类型	Article
摘要	The Yellow River (Huanghe) is the second largest river in China and is known for its high turbidity. It also has remarkably high levels of dissolved uranium (U) concentrations (up to 38 nmol l(-1)). To examine the mixing behavior of dissolved U between river water and seawater, surface water samples were collected along a salinity gradient from the Yellow River plume during September 2004 and were measured for dissolved U concentration, U-234:U-238 activity ratio, phosphate (PO43-), and suspended particulate matter. Laboratory experiments were also conducted to simulate the mixing process in the Yellow River plume using unfiltered Yellow River water and filtered seawater. The results showed a nonconservative behavior for dissolved U at salinities < 20 with an addition of U to the plume waters estimated at about 1.4 X 10(5) mol yr(-1). A similarity between variations in dissolved U and PO43- with salinity was also found. There are two major mechanisms, desorption from suspended sediments and diffusion from interstitial waters of bottom sediments, that may cause the elevated concentrations of dissolved U and PO43- in mid-salinity waters. Mixing experiments indicate that desorption seems more responsible for the elevated dissolved U concentrations, whereas diffusion influences more the enrichment of PO43-.; The Yellow River (Huanghe) is the second largest river in China and is known for its high turbidity. It also has remarkably high levels of dissolved uranium (U) concentrations (up to 38 nmol l(-1)). To examine the mixing behavior of dissolved U between river water and seawater, surface water samples were collected along a salinity gradient from the Yellow River plume during September 2004 and were measured for dissolved U concentration, U-234:U-238 activity ratio, phosphate (PO43-), and suspended particulate matter. Laboratory experiments were also conducted to simulate the mixing process in the Yellow River plume using unfiltered Yellow River water and filtered seawater. The results showed a nonconservative behavior for dissolved U at salinities < 20 with an addition of U to the plume waters estimated at about 1.4 X 10(5) mol yr(-1). A similarity between variations in dissolved U and PO43- with salinity was also found. There are two major mechanisms, desorption from suspended sediments and diffusion from interstitial waters of bottom sediments, that may cause the elevated concentrations of dissolved U and PO43- in mid-salinity waters. Mixing experiments indicate that desorption seems more responsible for the elevated dissolved U concentrations, whereas diffusion influences more the enrichment of PO43-.
关键词	Series Intercomparison Project Amazon Shelf Pore Waters Sediments Isotopes Geochemistry Colloids Removal Ocean Complexation
学科领域	Environmental Sciences ; Marine & Freshwater Biology
收录类别	SCI
语种	英语
WOS记录号	WOS:000252891600002
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/5346
专题	海洋生态与环境科学重点实验室
作者单位	1.Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Peoples R China 2.Univ So Calif, Dept Earth Sci, Los Angeles, CA 90089 USA 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 4.Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Xueyan,Yu, Zhigang,Ku, Teh-Lung,et al. Behavior of uranium in the Yellow River plume (Yellow river estuary)[J]. ESTUARIES AND COASTS,2007,30(6):919-926.
APA	Jiang, Xueyan,Yu, Zhigang,Ku, Teh-Lung,Kang, Xinglun,Wei, Wei,&Chen, Hongtao.(2007).Behavior of uranium in the Yellow River plume (Yellow river estuary).ESTUARIES AND COASTS,30(6),919-926.
MLA	Jiang, Xueyan,et al."Behavior of uranium in the Yellow River plume (Yellow river estuary)".ESTUARIES AND COASTS 30.6(2007):919-926.

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