Environmental implications of spatial and temporal distributions of multiple metallic elements in marginal marine sediments from Eastern Hainan Island, South China Sea
Environmental implications of spatial and temporal distributions of multiple metallic elements in marginal marine sediments from Eastern Hainan Island, South China Sea
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DOI：
10.1007/s11368-023-03524-9
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发表时间：
2023-05
影响因子：
3.6
通讯作者：
Zhuo Chen;Libin Wu;Liqiang Xu;Xiaodong Liu
中科院分区：
文献类型：
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作者：
Zhuo Chen;Libin Wu;Liqiang Xu;Xiaodong Liu
目的通过对采自海南岛东部陆架不同距离梯度的4个沉积物柱样的地球化学分析，探讨元素含量的时空变化及其影响因素。均采自海南岛东部陆架。采用电感耦合等离子体质谱法（ICP-MS）测定微量元素的浓度。我们使用X射线荧光光谱仪（XRF）来测量主要元素的浓度。结合MS、TN、TOC、粒度等数据，综合运用相关分析、主成分分析、聚类分析等多种统计分析方法，对海洋沉积物中金属元素的含量进行空间分析。从时间分布上看，Cu、Zn、As、Pb、Ni、Cr的浓度总体上是由下往上逐渐增加的。结论随着海南岛经济社会的发展和相关政策的实施，柱状样的浓度呈现同步增加的趋势。沉积物中的金属和类金属元素主要受陆源碎屑和海洋物质输入的影响。氧化还原条件也可能影响某些元素如As和Cr的地球化学特征。
PurposeThis study investigated the spatial and temporal changes of elemental concentrations and their influencing factors, based on geochemical analysis of four sediment cores collected from the eastern shelf of Hainan Island, South China Sea, with different distance gradients from the coast.MethodsSamples used in the study, the four sedimentary cores C1, C2, C3, and C4, were all collected from the eastern Hainan shelf in the South China Sea. The concentrations of trace elements were measured by inductively coupled plasma-mass spectrometry (ICP-MS). We use X-ray fluorescence spectrometer (XRF) to measure concentrations of major elements. Combined with MS, TN, TOC, and particle size data, and then, multiple statistical analysis methods including correlation, principal component, and cluster analyses, these are comprehensively used.ResultsSpatially, the contents of metallic elements are closely related to offshore distance. In terms of temporal distribution, the concentrations of Cu, Zn, As, Pb, Ni, and Cr overall increase from the bottom toward the surface.ConclusionThe cores show a simultaneous increase with the economic and social development of Hainan Island and the implementation of related policies. The metallic and metalloid elements in the sediments are mainly affected by the input of terrigenous debris and maritime materials. Redox conditions may also influence the geochemical characteristics of some elements such as As and Cr.