An Integrated Model for Input and Migration of Mercury in Chinese Coastal Sediments

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	An Integrated Model for Input and Migration of Mercury in Chinese Coastal Sediments
	Meng, Mei ; Sun, Ruo-yu ; Liu, Hong-wei ; Yu, Ben ; Yin, Yong-guang ; Hu, Li-gang ; Shi, Jian-bo ; Jiang, Gui-bin
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2019-03-05
卷号	53 期号:5 页码:2460-2471
ISSN号	0013-936X
英文摘要	Coastal sediments are a major sink of the global mercury (Hg) biogeochemical cycle, bridging terrestrial Hg migration to the open ocean. It is thus of substantial interest to quantify the Hg contributors to coastal sediments and the extents to which the Hg sequestered into coastal sediments affects the ocean. Here, we measured concentrations and isotope compositions of Hg in Chinese coastal sediments and found that estuary sediments had distinctly higher delta Hg-202 and lower Delta Hg-199 values than marine sediments. Hg isotope compositions of marine sediments followed a latitudinal trend where delta Hg-202 decreases and Delta Hg-199 increases from north to south. An integrated model was developed based on a Hg isotope mixing model and urban distance factor (UDF), which revealed a significant difference in Hg source contributions among the estuary and marine sediments and a gradual change of dominant Hg sources from terrestrial inputs (riverine and industrial wastewater discharges) to atmospheric deposition with a decrease in urban impact. A UDF value of 306 +/- 217 was established as the critical point where dominant Hg sources started to change from terrestrial inputs to atmospheric deposition. Our study helps explain the input and migration of Hg in Chinese marginal seas and provides critical insights for targeted environmental management.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42899]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
作者单位	1.Jianghan Univ, Inst Environm & Hlth, Wuhan 430056, Hubei, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 3.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	Meng, Mei,Sun, Ruo-yu,Liu, Hong-wei,et al. An Integrated Model for Input and Migration of Mercury in Chinese Coastal Sediments[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2019,53(5):2460-2471.
APA	Meng, Mei.,Sun, Ruo-yu.,Liu, Hong-wei.,Yu, Ben.,Yin, Yong-guang.,...&Jiang, Gui-bin.(2019).An Integrated Model for Input and Migration of Mercury in Chinese Coastal Sediments.ENVIRONMENTAL SCIENCE & TECHNOLOGY,53(5),2460-2471.
MLA	Meng, Mei,et al."An Integrated Model for Input and Migration of Mercury in Chinese Coastal Sediments".ENVIRONMENTAL SCIENCE & TECHNOLOGY 53.5(2019):2460-2471.