Distribution,Risk,Source Apportionment,and Implications for Environmental Research of Heavy Metals and Radioactive Ele-ments/Nuclides in the Surface Sediments of the Beibu Gulf
Distribution,Risk,Source Apportionment,and Implications for Environmental Research of Heavy Metals and Radioactive Ele-ments/Nuclides in the Surface Sediments of the Beibu Gulf
This study comprehensively analyzed heavy metals(Hg,Cr,Zn,As,Cd,Ni,Cu and Pb)and radioac-tive nuclides(238U,232Th,210Pb and 239+240Pu)in the surface sediments of the Beibu Gulf of China,aiming to assess their environmental risks and investigate their effectiveness as environmental indicators.The results showed that except for the Cr concentration in some areas exceeding the standard of the first category of indi-cators in the Marine Sediment Quality(GB 18668-2002),the concentrations of other heavy metals were lower than the standards of indicators in the first category.The environmental risk assessment of radioactive nuclides showed that 238U and 232Th belonged to the second level(safety level),while 210Pb and 239+240Pu still lacked assessment criteria.Some heavy metals and radioactive elements nuclides showed a"T"type distribu-tion,which implied a variety of pollution sources and transmission mechanisms.The results show the unique source phase tracing potential of radioactive elements/nuclides in marine environmental monitoring and man-agement.Moreover,the results reveal that the research on marine radioactivity as an interdisciplinary subject can give new insights into the research on protection and comprehensive pollution control of the marine envi-ronment.
关键词
北部湾/表层沉积物/重金属/放射性核素/环境风险评估/空间分布/环境研究启示
Key words
Beibu Gulf/surface sediments/heavy metals/radioactive nuclides/environmental risk assessment/spatial distribution/implication for environmental research
维普
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