Open AccessDistribution and source of Pu in the sediments of the seas and estuaries of China—a review
Author(s) -
Ruirui Wang,
Yong Li
Publication year - 2020
Publication title -
anthropocene coasts
Language(s) - English
Resource type - Journals
ISSN - 2561-4150
DOI - 10.1139/anc-2019-0017
Subject(s) - estuary , sediment , oceanography , china , sedimentary rock , geology , current (fluid) , environmental science , geochemistry , geomorphology , geography , archaeology
The coastal zone is the most concentrated area of human activities, and it is also the main accumulation zone of continental sediments, which is an ideal area for studying anthropocene sedimentary records. This study summarizes the distribution of 239+240 Pu activity, 239+240 Pu inventory, and 240 Pu/ 239 Pu atom ratios in the sediments of the seas and estuaries of China. Studies have shown that the distribution of 239+240 Pu activity in sediments is mainly influenced by sediment properties and ocean current dynamics. Furthermore, 239+240 Pu activity in sediment cores has obvious peak characteristics, which can be used in sediment dating. In fact, 240 Pu/ 239 Pu atom ratios indicate that the Pu in the sediments of the seas and estuaries of China mainly comes from global fallout and the Pacific Proving Grounds (PPG). Pu from the PPG enters the seas of China through the North Equatorial Current and Kuroshio intrusion current. And the contribution of Pu from the PPG in the East China Sea, the South China Sea, and the Yangtze estuary is over 40%. Moreover, Pu has been applied in the tracer of land–sea interactions and ocean dynamics, and it can be used as a background value to study the changes of Pu in the coastal zone of China in the future.