气候变化领域集成服务门户(CCPortal): An overview of current knowledge concerning the inventory and sources of plutonium in the China Seas

CCPortal

DOI	10.1016/j.marpolbul.2019.110599
	An overview of current knowledge concerning the inventory and sources of plutonium in the China Seas
	Wu J.; Sun J.; Xiao X.
发表日期	2020
ISSN	0025326X
卷号	150
英文摘要	This study reviews the current understanding of the inventory and sources of plutonium (Pu) in the marine environment adjacent to China. The 239+240Pu inventory in the China Seas was found to have large spatial variations. The quantity in sediments decreases away from the shore, generally tracing the sedimentation rate distribution. High 239+240Pu inventories indicated that Pu in the water column was easily scavenged since Pu has a high particle affinity. Indeed, substantially higher 240Pu/239Pu atom ratios were observed in the sediment and seawater of the China Seas than are found in global fallout. We thus clarified that Pu sources in the China Seas were from both global fallout and the Pacific Proving Grounds (PPG) in the Pacific Marshall Islands. Plutonium from the latter source is transported into the China Seas through the North Equatorial Current (NEC) and Kuroshio. Using a two end-member mixing model, we revealed that the contribution of Pu from the PPG accounts for over 40% of the Pu in the East China Sea (ECS) and South China Sea (SCS), and less than 20% of the Pu in the Yellow Sea (YS). The distributions and isotopic composition of Pu in the China Seas indicate strong scavenging of Pu in the ECS and high Pu accumulation in the SCS. This information on the inventory and isotopic composition of Pu helps to establish a background for the future study of Pu in the China Seas. © 2019 Elsevier Ltd
英文关键词	240Pu/239Pu atom ratio; China Sea; Kuroshio; North equatorial current; Pacific proving grounds; Plutonium
语种	英语
scopus关键词	Fallout; Isotopes; Ocean currents; Atom ratio; China Sea; Isotopic composition; Kuroshio; Marine environment; North Equatorial Current; Sedimentation rates; Spatial variations; Plutonium; plutonium; plutonium 239; plutonium 240; plutonium; isotopic composition; marine pollution; plutonium isotope; pollutant source; pollutant transport; sedimentation rate; spatial distribution; spatial variation; binding affinity; chemical composition; China; East China Sea; geographic distribution; marine environment; Pacific islands; pollution monitoring; pollution transport; sea pollution; seashore; sediment; sedimentation; South China Sea; Yellow Sea; Federated States of Micronesia; radiation monitoring; radioactive waste; sea; water pollutant; Kuroshio Current; Marshall Islands; North Equatorial Current; Pacific Ocean; South China Sea; China; Geologic Sediments; Micronesia; Oceans and Seas; Pacific Islands; Plutonium; Radiation Monitoring; Radioactive Fallout; Water Pollutants, Radioactive
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/149395
作者单位	College of Science, Shantou University, Shantou, 515063, China
推荐引用方式 GB/T 7714	Wu J.,Sun J.,Xiao X.. An overview of current knowledge concerning the inventory and sources of plutonium in the China Seas[J],2020,150.
APA	Wu J.,Sun J.,&Xiao X..(2020).An overview of current knowledge concerning the inventory and sources of plutonium in the China Seas.Marine Pollution Bulletin,150.
MLA	Wu J.,et al."An overview of current knowledge concerning the inventory and sources of plutonium in the China Seas".Marine Pollution Bulletin 150(2020).