Environmental geochemistry reflected by rare earth elements in Bohai Bay (North China) core sediments

doi:10.1039/c0em00013b

	Environmental geochemistry reflected by rare earth elements in Bohai Bay (North China) core sediments
	Xu, Ya-Yan 1,2,3; Song, Jin-Ming1 ; Duan, Li-Qin 1,2; Li, Xue-Gang 1; Zhang, Ying 1,2; Sun, Pei-Yan 3
	2010-08-01
发表期刊	JOURNAL OF ENVIRONMENTAL MONITORING
卷号	12 期号:8 页码:1547-1555
文章类型	Article
摘要	In Bohai Bay sediment, two cores were collected to estimate the source of sediments, and assess the environmental changes. Sequential extractions were carried out in this study. Rare earth elements (REE) were leached out from four labile fractions: Exchangeable (L1), Bound to carbonates (L2), Bound to Fe-Mn oxides (L3), Bound to organic matter (L4), and the remainder was Residual (R5). The percentages of REE in different fractions follow the order: R5 > L3 > L2 > L4 > L1. With heavy REE depletion and no pronounced REE fractionation, NASC-normalized REE patterns of Bohai Bay sediments are quite consistent with that of Haihe River sediment, which is the key river of Bohai Bay. Y/Ho ratios of total contents are all much lower than the average value of continental crust, while Y/Ho ratios of L2 are higher than those of other fractions. Based on the patterns of REE and Y/Ho ratios of samples, sediments of Bohai Bay mainly come from terrigenous matters, which are mainly brought by Haihe River. And REE combined with carbonates may be partly inherited from anthropogenic matter. Moreover, environmental changes exert significant influences on the patterns and fractionations of REE, and they can be deduced from the characteristics of REE. Our results on the patterns and burial fluxes of REE reflect two environmental changes: Bohai Bay has been shifting towards more reducing conditions in the last one hundred years, and there was a large flood in 1939.
DOI	10.1039/c0em00013b
收录类别	SCI
语种	英语
WOS记录号	WOS:000281374400006
引用统计	被引频次：6[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/337002/32776
专题	海洋生态与环境科学重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.State Ocean Adm, N China Sea Environm Monitoring Ctr, Qingdao 266033, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Xu, Ya-Yan,Song, Jin-Ming,Duan, Li-Qin,et al. Environmental geochemistry reflected by rare earth elements in Bohai Bay (North China) core sediments[J]. JOURNAL OF ENVIRONMENTAL MONITORING,2010,12(8):1547-1555.
APA	Xu, Ya-Yan,Song, Jin-Ming,Duan, Li-Qin,Li, Xue-Gang,Zhang, Ying,&Sun, Pei-Yan.(2010).Environmental geochemistry reflected by rare earth elements in Bohai Bay (North China) core sediments.JOURNAL OF ENVIRONMENTAL MONITORING,12(8),1547-1555.
MLA	Xu, Ya-Yan,et al."Environmental geochemistry reflected by rare earth elements in Bohai Bay (North China) core sediments".JOURNAL OF ENVIRONMENTAL MONITORING 12.8(2010):1547-1555.

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