School of Geodesy and Geomatics Engineering, Huaihai Institute of Technology, Lianyungang, Jiangsu 222005, China.
School of Geodesy and Geomatics Engineering, Huaihai Institute of Technology, Lianyungang, Jiangsu 222005, China.
Mar Pollut Bull. 2017 Mar 15;116(1-2):56-63. doi: 10.1016/j.marpolbul.2016.12.063. Epub 2016 Dec 28.
We analyzed element concentrations in cores from the Lianyungang coastal sea to determine depositional trends and geochemical sources of metals. Enrichment factors (EFs) and pollution load index (PLI) were used to assess the enrichment and pollution of metals. Profiles of vertical distributions of the elements reflected different depositional environments in 3 cores. Cores A and C deposited sediments with rich terrestrial elements by rivers, corresponding to mixed-up patterns in the sediment. Meanwhile, core B was mainly deposited in a less undisturbed depositional environment. Correlations and principal component analysis indicated that sediments were influenced by natural and anthropogenic impacts. According to the EFs, most metals showed no significant enrichment and pollution in the core sediments. Lastly, PLI values (<1) of sediments indicated that the Lianyungang coastal sea was a lowly polluted area despite PLI value of metals in average sediment was lower than that in surface sediment.
我们分析了连云港近岸海域岩芯中的元素浓度，以确定金属的沉积趋势和地球化学来源。富集因子（EF）和污染负荷指数（PLI）用于评估金属的富集和污染程度。元素的垂直分布特征反映了 3 个岩心中不同的沉积环境。岩心 A 和 C 沉积的河流富含陆源元素，对应的沉积物混合模式。同时，岩心 B 主要沉积在受干扰较小的沉积环境中。相关性和主成分分析表明，沉积物受到自然和人为因素的影响。根据 EF，大多数金属在岩芯沉积物中没有明显的富集和污染。最后，沉积物的 PLI 值（<1）表明，尽管连云港近岸海域的平均沉积物中金属的 PLI 值低于表层沉积物，但该海域仍属于低污染区域。
