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首页> 外文期刊>Environmental Science & Technology >An Integrated Approach to the Assessment of Pollutant Delivery Chronologies to Impacted Areas: Hg in the Augusta Bay (Italy)
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An Integrated Approach to the Assessment of Pollutant Delivery Chronologies to Impacted Areas: Hg in the Augusta Bay (Italy)

机译：评估向受灾地区的污染物输送时间的综合方法：奥古斯塔湾（意大利）中的汞

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摘要

Assessing pollution levels and trends in heavily impacted environments is important but hardly achievable due to the difficulty of recovering suitable undisturbed sediment records. An integrated approach is here presented to solve this kind of problem. It was adopted in the Augusta Bay (Italy) for the study of Hg historical inputs and present trends. Archive information on dredging and mud disposal, together with bathymetry and high-resolution seismic profiles, were used to identify suitable sampling sites. Undisturbed sediment cores were collected in the port and bay. Sediments were analyzed for depth distributions of radiotracers (~(210)Pb and ~(137)Cs), Hg, and main sediment parameters (magnetic susceptibility, grain size, dry bulk density, mineralogy, and organic carbon and nitrogen contents). Hexachlorobenzene (HCB) was also analyzed as an additional time tracer, since its production history in the area was well-known. Results show that peak Hg contamination (up to 575 mg·kg~(-1)) was reached in the 1970s. Technological improvements and waste treatment in the following years determined a consistent decrease, but high concentrations still affect surficial sediments (0.25-92 mg·kg~(-1)). Hg-HCB correlation suggests that this situation is likely the effect of resuspension and redistribution of deep sediments by dredging and naval traffic.
机译：评估受严重影响的环境中的污染水平和趋势很重要，但由于难以恢复合适的原状沉积物记录，因此很难实现。这里提出了一种综合方法来解决这种问题。它被奥古斯塔湾（意大利）采用，用于研究汞的历史输入和当前趋势。有关疏dr和泥浆处置的存档信息，以及测深法和高分辨率地震剖面，用于确定合适的采样地点。在港口和海湾收集了不受干扰的沉积物芯。分析了沉积物的放射性示踪剂（〜（210）Pb和〜（137）Cs）的深度分布，汞和主要沉积物参数（磁化率，粒度，干重密度，矿物学以及有机碳和氮含量）。由于六氯苯（HCB）在该地区的生产历史已广为人知，因此也被作为时间追踪剂进行了分析。结果表明，在1970年代达到了Hg污染峰值（高达575 mg·kg〜（-1））。在随后的几年中，技术的进步和废物的处理确定了持续减少，但是高浓度仍然影响表层沉积物（0.25-92 mg·kg〜（-1））。 Hg-HCB的相关性表明，这种情况很可能是由于疏and和海上航行而造成的深层沉积物重新悬浮和重新分布的结果。

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  • 来源
    《Environmental Science & Technology》 |2012年第4期|p.2040-2046|共7页
  • 作者

    Luca Giorgio Bellucci; Silvia Giuliani; Stefania Romano; Sonia Albertazzi; Cristian Mugnai; Mauro Frignani;

  • 作者单位

    Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche, Bologna, Via Gobetti 101, 40129 Bologna, Italy;

    Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche, Bologna, Via Gobetti 101, 40129 Bologna, Italy;

    Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche, Bologna, Via Gobetti 101, 40129 Bologna, Italy;

    Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche, Bologna, Via Gobetti 101, 40129 Bologna, Italy;

    Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche, Bologna, Via Gobetti 101, 40129 Bologna, Italy;

    Istituto di Scienze Marine, Consiglio Nazionale delle Ricerche, Bologna, Via Gobetti 101, 40129 Bologna, Italy;

  • 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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