Distribution and source identification of Pu in the tidal flat wetlands of northern Jiangsu Province and radial sand ridge of southern Yellow Sea-An explanation of “land-sea interaction”

239Pu, 240Pu in the surface sediments from tidal flat wetlands in northern Jiangsu Province and radial sand ridge in southern Yellow Sea were analyzed by SF-ICP-MS. Tidal flat wetlands and radial sand ridge are the special sediment deposits in coastal area, which are the ideal places to study “land-sea interaction”. The 240Pu/239Pu atom ratios in our research samples show that the Pu in most samples is from global fallout, only the Pu in a few...