Evaluation of Natural Radioactivity in Marine Sand Deposits from Offshore China
作者： Jun Li , Bangqi Hu , Jingtao Zhao , Fenglong Bai , Yanguang Dou
关键词:
摘要: Natural radioactivity is very important for the assessment of marine sand property and usability. By using gamma spectrometry, concentration natural radionuclides 226Ra, 232Th 40K have been measured in deposits from Liaodong Bay (LDB), North Yellow Sea (NYS), Zhoushan area (ZS), Taiwan Shoal (TS) Pearl River Mouth (PR), offshore China, which are potential mining areas. The radiation activity equivalent (Raeq), indoor absorbed dose rate (DR), annual effective (HR), alpha index (Ia), (Ig), external hazard (Hex), internal (Hin), representative level (RLI), excess lifetime cancer risk (ELCR) gonadal (AGDE) associated with calculated to assess sands China. From analysis, it found that these safe constructions. Pearson correlation coefficient reveals 226Ra distribution China controlled by variation concentration. Principal component analysis (PCA) yields a two-component representation entire data sands, wherein 98.22% total variance explained. Our results provide good baseline expand database building materials all over world.
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