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首页> 外文期刊>Environmental Science & Technology >Status of Metal Contamination in Surface Waters of the Coastal Ocean off Los Angeles, California since the Implementation of the Clean Water Act
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Status of Metal Contamination in Surface Waters of the Coastal Ocean off Los Angeles, California since the Implementation of the Clean Water Act

机译：自《清洁水法》实施以来，加利福尼亚州洛杉矶附近沿海海洋表层水中的金属污染状况

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摘要

In order to establish the status of metal contamination in surface waters in the coastal ocean off Los Angeles, California, we determined their dissolved and participate pools and compared them with levels reported in the 1970s prior the implementation of the Clean Water Act These measurements revealed a significant reduction in paniculate toxic metal concentrations to the last 33 yean with decreases of ～100-fold for Pb and ～400-fold for Cu and Cd. Despite these reductions, the source of paniculate metals appears to be primarily anthropogenic as enrichment factors were orders of magnitude above what is considered background crustal levels. Overall, dissolved trace metal concentrations in the Los Angeles coastal waters were remarkably low with values in the same range as those measured in a pristine coastal environment off Mexico's Baja California peninsula. In order to estimate the impact of metal contamination on regional phytoplankton, the internalization rate of trace metals in a locally isolated phytoplankton model organism (Synechococcus sp. CC9311) was also determined showing a rapid internalization (in the order of a few hours) for many trace metals (e.g., Ag, Cd, Cu, Pb) suggesting that those metals could potentially be incorporated into the local food webs.
机译：为了确定加利福尼亚洛杉矶附近沿海海洋表层水中金属污染的状况，我们确定了它们的溶解池和参与池，并将其与《清洁水法》实施之前的1970年代报告的水平进行比较。颗粒中的有毒金属浓度显着降低至最近的33年，Pb降低了约100倍，Cu和Cd降低了约400倍。尽管减少了这些数量，但由于富集因子比背景地壳水平高出几个数量级，因此颗粒状金属的来源似乎主要是人为的。总体而言，洛杉矶沿海水域中的溶解性痕量金属浓度非常低，其范围与墨西哥下加利福尼亚州半岛原始沿海环境中测得的浓度范围相同。为了评估金属污染对区域浮游植物的影响，还确定了局部分离的浮游植物模型生物（Synechococcus sp。CC9311）中痕量金属的内在化速率，表明许多生物都快速内化（约数小时）痕量金属（例如，Ag，Cd，Cu，Pb）表明这些金属可能会掺入当地食物网中。

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  • 来源
    《Environmental Science & Technology》 |2012年第8期|p.4304-4311|共8页
  • 作者

    Emily A. Smail; Eric A. Webb; Robert P. Franks; Kenneth W. Bruland; Sergio A. Sanudo-Wilhelm;

  • 作者单位

    Department of Biological Sciences and Department of Earth Sciences, University of Southern California, Marine Biology and Biological Oceanography, Los Angeles, California 90089-0371, United States;

    Department of Biological Sciences and Department of Earth Sciences, University of Southern California, Marine Biology and Biological Oceanography, Los Angeles, California 90089-0371, United States;

    Department of Ocean Sciences, University of California at Santa Cruz, Santa Cruz, California 95064, United States;

    Department of Ocean Sciences, University of California at Santa Cruz, Santa Cruz, California 95064, United States;

    Department of Biological Sciences and Department of Earth Sciences, University of Southern California, Marine Biology and Biological Oceanography, Los Angeles, California 90089-0371, United States;

  • 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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