Federal University of Pernambuco, Oceanography Department (Docean-UFPE), Brazil.
Regional Center of Nuclear Sciences, Environmental Department, CRCN-NE, Brazil.
Mar Pollut Bull. 2017 Oct 15;123(1-2):381-386. doi: 10.1016/j.marpolbul.2017.09.007. Epub 2017 Oct 12.
This study aims to infer the background values of several metals in the Capibaribe estuary and to identify the likely impact of anthropic activities during 200-years of sedimentation. Two cores were sampled, with subsamples at intervals of 2cm. Sedimentation rates and metal concentrations were analyzed. The Al-normalized method was used to infer the background values, and to identify anthropic influences, the enrichment factor, the contamination factor and the geoaccumulation index were employed. The background values showed concentrations for Mn of 292.2, for Co of 10.4, for Ni of 22.3, for Cu of 60.8, for Zn of 105.5, for As of 106.0, for Pb of 52.9 (all in mgkg) and for Fe of 2.7%, The higher values, mainly for As, Zn and Pb, are associated with the influence of the Barreiras Formation. The geogenic inputs are significantly greater than the anthropic activities, masking the contamination.
本研究旨在推断卡皮瓦拉巴河口几种金属的背景值，并确定在 200 年的沉积过程中人为活动的可能影响。采集了两个岩芯，每隔 2 厘米取一个子样本。分析了沉积速率和金属浓度。采用 Al 归一化法推断背景值，采用富集因子、污染因子和地积累指数来识别人为影响。背景值显示 Mn 的浓度为 292.2mgkg，Co 为 10.4mgkg，Ni 为 22.3mgkg，Cu 为 60.8mgkg，Zn 为 105.5mgkg，As 为 106.0mgkg，Pb 为 52.9mgkg，Fe 为 2.7%。较高的值，主要是 As、Zn 和 Pb，与巴雷拉斯地层的影响有关。地球成因输入明显大于人为活动，掩盖了污染。
