Conrad Christine F, Fugate David, Daus Janice, Chisholm-Brause Catherine J, Kuehl Steven A
College of William and Mary, School of Marine Science, Virginia Institute of Marine Science, 1208 Greate Road, Gloucester Point, VA 23062, USA.
Mar Pollut Bull. 2007 Apr;54(4):385-95. doi: 10.1016/j.marpolbul.2006.11.005. Epub 2007 Jan 18.
Two sediment cores (Southern Branch, PC-1, and Western Branch, WB-2) were taken from the highly industrialized Elizabeth River, Virginia. The concentrations of trace metals cadmium, cobalt, chromium, copper, nickel, lead and zinc, major elements iron, manganese and aluminum, organic carbon content and the specific surface area of the sediments were determined in each of the cores. Down-core variations in metals varied significantly in each core with maximum contamination events occurring at different times in different portions of the river. In PC-1, maximum metal concentrations were seen after the appearance of (137)Cs. In contrast, the highest levels in WB-2 occurred well before the appearance of (137)Cs. Although stricter environmental regulations have caused a decrease in metal concentrations since the 1980s, the concentrations in the surface sediments of many trace metals were elevated to levels 2-5 times higher than the levels at the bottom of the cores in both the Southern and Western Branches of the river.
从弗吉尼亚州高度工业化的伊丽莎白河中采集了两个沉积物岩芯（南支，PC - 1，和西支，WB - 2）。测定了每个岩芯中痕量金属镉、钴、铬、铜、镍、铅和锌、主要元素铁、锰和铝的浓度、有机碳含量以及沉积物的比表面积。各岩芯中金属随深度的变化差异显著，不同河段不同时间出现了最大污染事件。在PC - 1中，金属浓度最大值出现在铯 - 137出现之后。相比之下，WB - 2中的最高水平在铯 - 137出现之前就已出现。尽管自20世纪80年代以来更严格的环境法规导致金属浓度有所下降，但该河的南支和西支表层沉积物中许多痕量金属的浓度仍比岩芯底部的水平高出2至5倍。
