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首页> 外文期刊>Environmental Science & Technology >Zn and Cu Isotopes as Tracers of Anthropogenic Contamination in a Sediment Core from an Urban Lake
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Zn and Cu Isotopes as Tracers of Anthropogenic Contamination in a Sediment Core from an Urban Lake

机译：锌和铜同位素作为城市湖泊沉积物芯中人为污染的示踪剂

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摘要

In this work, we use stable Zn and Cu isotopes to identify the sources and timing of the deposition of these metals in a sediment core from Lake Ballinger near Seattle, Washington, USA. The base of the Lake Ballinger core predates settlement in the region, while the upper sections record the effects of atmospheric emissions from a nearby smelter and rapid urbanization of the watershed, δ~(66)Zn and δ~(65)Cu varied by 0.50‰ and 0.29‰, respectively, over the 500 year core record. Isotopic changes were correlated with the presmelter period (～1450 to 1900 with δ~(66)Zn = +0.39￥ ± 0.09%. and δ~(65)Cu = +0.77‰ ± 0.06‰), period of smelter operation (1900 to 1985 with δ~(66)iZn = +0.14 ± 0.06‰ and δ~(65)iCu = +0.94 ± 0.10‰), and postsmelting/stable urban land use period (post 1985 with δ~(66)Zn = 0.00 ± 0.10‰ and δ~(65)Cu = +0.82‰ ± 0.12‰). Rapid early urbanization during the post World War II era increased metal loading to the lake but did not significantly alter the δ~(66)iZn and δ~(65)Cu, suggesting that increased metal loads during this time were derived mainly from mobilization of historically contaminated soils. Urban sources of Cu and Zn were dominant since the smelter closed in the 1980s, and the δ~(66)Zn measured in tire samples suggests tire wear is a likely source of Zn.
机译：在这项工作中，我们使用稳定的Zn和Cu同位素来确定这些金属在美国华盛顿州西雅图附近的Ballinger湖沉积核心中沉积的来源和时机。巴林格湖核心的底部早于该区域的沉降，而上段则记录了附近冶炼厂的大气排放和流域快速城市化的影响，δ〜（66）Zn和δ〜（65）Cu变化了0.50。 500年核心记录分别为‰和0.29‰。同位素变化与冶炼前期（〜1450至1900，δ〜（66）Zn = + 0.39 ￥±0.09％。δ〜（65）Cu = + 0.77‰±0.06‰），冶炼厂运行时间（1900年）相关。到1985年，δ〜（66）iZn = +0.14±0.06‰和δ〜（65）iCu = +0.94±0.10‰），后融化/稳定的城市土地使用期（1985年以后，δ〜（66）Zn = 0.00 ±0.10‰和δ〜（65）Cu = + 0.82‰±0.12‰）。第二次世界大战后时期早期的快速城市化进程增加了湖泊中的金属负荷，但并未显着改变δ〜（66）iZn和δ〜（65）Cu，这表明这段时期的金属负荷增加主要来自于历史上受污染的土壤。自从1980年代冶炼厂关闭以来，城市中的铜和锌的来源一直占主导地位，轮胎样品中测得的δ〜（66）Zn表明轮胎磨损可能是锌的来源。

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  • 来源
    《Environmental Science & Technology》 |2010年第5期|p.1544-1550|共7页
  • 作者

    ANITA THAPALIA; DAVID M. BORROK; PETER C. VAN METRE; MARYLYNN MUSGROVE; EDWARD R. LANDA;

  • 作者单位

    Department of Geological Sciences, University of Texas at El Paso, El Paso, Texas 79968;

    rnDepartment of Geological Sciences, University of Texas at El Paso, El Paso, Texas 79968;

    rnU.S. Geological Survey, 8027 Exchange Drive, Austin, Texas 78754;

    rnU.S. Geological Survey, 8027 Exchange Drive, Austin, Texas 78754;

    rnU.S. Geological Survey, MS 430, 12201 Sunrise Valley Drive, Reston, Virginia 20192;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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