College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China; Qingdao Geo-Engineering Survering Institute, Qingdao 266101, China.
College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
Mar Pollut Bull. 2023 Jul;192:115034. doi: 10.1016/j.marpolbul.2023.115034. Epub 2023 May 13.
We analyzed ten trace metals (Cu, Pb, Zn, Cr, Cd, Hg, As, Ni, V, Co and Ni) in sediments of the upper 14.98 m of core WHZK01 from the muddy area off the Shandong Peninsula, northwestern South Yellow Sea, to analyze their content, vertical distribution, and the enrichment status. Except for Hg and As, the other metals (Cu, Pb, Zn, Cr, Cd, Ni, V, Co and Ni) were mainly controlled by grain size. When the sediment particle size became smaller, the metal content reached a high level. Moreover, oxides and hydroxides of Al, Ti, Fe, and Mn also contributed to the metal enrichments due to their strong adsorption to the metals. Over the past four stages of 10-7 kyr BP, 7-4.5 kyr BP, 4.5-2.5 kyr BP, and 2.5 kyr BP to date, the metal values have shown a trend of increasing - fluctuating to high values - decreasing - re-increasing, respectively. However, since 4.5 kyr BP, Hg concentrations have been on an increasing trend, associated with the release of large amounts of contaminants into the environment from ancient human metal mining and smelting activities. As concentrations, despite the fluctuating changes, have remained relatively stable at high levels since 5.5 kyr BP, associated with their high background values.
我们分析了来自北黄海山东半岛泥质区 WHZK01 岩芯上部 14.98 米沉积物中的十种痕量金属（Cu、Pb、Zn、Cr、Cd、Hg、As、Ni、V 和 Co），以分析它们的含量、垂直分布和富集状况。除 Hg 和 As 外，其他金属（Cu、Pb、Zn、Cr、Cd、Ni、V、Co 和 Ni）主要受粒度控制。当沉积物粒径变小时，金属含量达到较高水平。此外，Al、Ti、Fe 和 Mn 的氧化物和氢氧化物也由于对金属的强烈吸附而促进了金属的富集。在过去的四个阶段，即 10-7 千年前、7-4.5 千年前、4.5-2.5 千年前和 2.5 千年前至今，金属值分别呈现出增加-波动到高值-减少-再次增加的趋势。然而，自 4.5 千年前以来，Hg 浓度一直呈上升趋势，这与古代人类金属采矿和冶炼活动向环境中释放大量污染物有关。As 浓度虽然存在波动变化，但自 5.5 千年前以来一直保持在较高水平，这与它们的高背景值有关。
