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首页> 外文期刊>Environmental Monitoring and Assessment >What factors determine trace metal contamination in Lake Tonga (Algeria)?
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What factors determine trace metal contamination in Lake Tonga (Algeria)?

机译：哪些因素决定了汤加湖（阿尔及利亚）中的痕量金属污染？

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摘要

A study of trace metal (TM) contamination was conducted at Lake Tonga (Algeria), a site surrounded by several indirect contamination point sources such as an abandoned mine and steelworks. Studying two sampling sites over four seasons, we were able to depict the spatial and temporal variability of TM contamination in the lake. Among the seven TM examined (Pb, Cd, Fe, Zn, Ni, Cu, and Cr), only Fe, Pb, and Cd showed concentrations significantly higher than the site's geological background. The contamination index (sediment concentration/background concentration) calculated for these three TM (Cd =1.9 ±1.6, Fe = 6.8±1.8, and Pb = 3.3±2.6) clearly indicated anthropogenic contamination. Sediment TM contamination differed both between sampling sites and seasons despite environmental variables (e.g., oxygen and pH) being similar, thus suggesting different TM contamination sources. Fe contamination was high at the two sampling sites and over all studied seasons, possibly indicating general lake-scale Fe contamination, probably related to atmospheric deposition of steelworks emissions both on the lake and within the watershed. Lake tributaries were further suspected of channeling Fe contamination from the watershed into the lake. On the other hand, the sampling site close to the outlet was especially rich in Cd and Pb typically reflecting contamination by mine wastes. The indirect connection between the abandoned mine and the lake indicates that runoff of mine leachates through groundwater was likely a candidate in explaining the specificity of the TM contamination in this part of the lake. This study provides insights for management of TM contamination by addressing both spatial and temporal variability within the lake as well as differences in contamination sources.
机译：在汤加湖（阿尔及利亚）进行了痕量金属（TM）污染的研究，该地区周围有许多间接污染点源，例如废弃的矿山和钢铁厂。通过研究四个季节的两个采样点，我们能够描述湖泊中TM污染的时空变化。在所检查的七个TM（铅，镉，铁，锌，镍，铜和铬）中，只有铁，铅和镉的浓度显着高于该地点的地质背景。这三个TM（Cd = 1.9±1.6，Fe = 6.8±1.8，Pb = 3.3±2.6）的污染指数（沉积物浓度/背景浓度）清楚地表明了人为污染。尽管环境变量（例如氧气和pH值）相似，但沉积物TM污染在采样地点和季节之间有所不同，因此暗示了不同的TM污染源。在这两个采样点以及整个研究季节中，Fe污染都很高，这可能表明湖泊范围内普遍存在Fe污染，这可能与湖中和流域内钢厂废气的大气沉积有关。进一步怀疑湖支流将Fe污染从流域引导到湖中。另一方面，靠近出口的采样点尤其富含Cd和Pb，通常反映了矿山废物的污染。废弃矿山与湖泊之间的间接联系表明，矿山渗滤液通过地下水的径流很可能是解释TM污染在该湖部分的特异性的候选者。这项研究通过解决湖泊内的时空变化以及污染源的差异，为管理TM污染提供了见识。

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  • 来源
    《Environmental Monitoring and Assessment》 |2013年第12期|9905-9915|共11页
  • 作者

    Belabed Bourhane-Eddine; Frossard Victor; Dhib Amel; Turki Souad; Aleya Lotfi;

  • 作者单位

    Departement des Sciences de la Mer, Faculte des Sciences, Universite Badji Mokhtar d'Annaba, Annaba BP 12, Algeria;

    Laboratoire de Chrono-Environnement, UMR CNRS 6249, Universite de Franche-Comt6, 1, Place Leclerc, 25030 Besancon cedex, France;

    Institut National des Sciences et Technologies de la Mer (INSTM), La Goulette Port de Peche 2060, Tunisia;

    Institut National des Sciences et Technologies de la Mer (INSTM), La Goulette Port de Peche 2060, Tunisia;

    Laboratoire de Chrono-Environnement, UMR CNRS 6249, Universite de Franche-Comt6, 1, Place Leclerc, 25030 Besancon cedex, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lake; Mine; Sediment; Trace metals;

    机译：湖;矿;沉淀;微量金属;

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