Distribution of heavy metals and radionuclides in the sediments and their environmental impacts in Nansha Sea area, South China Sea

MARINE POLLUTION BULLETIN

卷:166

Article

Liu, Jing¹  Peng, Anguo¹  Deng, Shuang¹  Liu, Min¹  Liu, Guangshan²  Li, Chao² 

[1] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China

[2] Xiamen Univ, Coll Environm & Ecol, Xiamen 361005, Peoples R China

关键词: Sediment;    Radionuclide;    Heavy metal;    Contamination assessment;    Nansha Sea area;   

DOI  :  10.1016/j.marpolbul.2021.112192

来源: Elsevier

【 摘 要 】

Activity concentrations of radionuclides (238U, 226Ra, 232Th, and 40K) in the sediments of eight sampling stations and heavy metal concentrations (Cr, Co, Ni, Cu, Zn, As, Cd, and Pb) in the sediments of two long cores from Nansha Sea area were obtained by high-purity germanium spectroscopy and inductively coupled plasma atomic emission spectrometry. In a correlation analysis between the radionuclides and heavy metals, 232Th was positively correlated with As and Pb. 238U demonstrated a significant positive correlation with Co, Ni, Cu, Zn, and Cd. 40K was positively correlated with Co, Ni, and Cu. The geo-accumulation index, pollution load index, potential ecological risk index, and multivariate statistical techniques were used to evaluate the pollution degree and possible sources of heavy metals in the sediments. An ecological risk assessment suggested that Cr, Co, Ni, Cu, Zn, Cd, and Pb were primarily derived from natural processes, while the source of As may be related to natural processes and human activities.

【 授权许可】

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