Sources and Variability of Plutonium in Chinese Soils: A Statistical Perspective with Moving Average

We investigated the different sources and their corresponding impact areas of Pu in Chinese surface soils to illustrate state-of-the-art sources, levels distributions 240Pu/239Pu atom ratios as well 239+240Pu activity concentrations China. For first time a moving average strategy combination with statistical analysis was employed partition geographic China based on reported ratio concentration data from public literature. During partitioning, median (MED) dataset basically criteria place commonly used arithmetic (AM). Concisely, three were partitioned according influences Lop Nor (LNTS) Semipalatinsk (STS) test sites global fallout. The Ternary area (80° E–105° E, 35° N–50° N) supposed have multiple including STS LNTS besides fallout, which characterized slightly lower (MED = 0.174) elevated 0.416 mBq/g). Meanwhile, Binary (35° N–45° N, 100° E–115° E) considered received extra contribution high-yield nuclear tests at resulting highest 0.200) across remaining marked Unitary area, where it only exclusive Furthermore, through we recommended value 0.186 ± 0.021 (AM SD) representative or area-specific baseline characterize fallout derived soils.