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首页> 外文期刊>Estuarine Coastal and Shelf Science >Behaviour and fate of urban particles in coastal waters: Settling rate, size distribution and metals contamination characterization
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Behaviour and fate of urban particles in coastal waters: Settling rate, size distribution and metals contamination characterization

机译：沿海水域中城市颗粒物的行为和结局：沉降率，粒径分布和金属污染特征

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摘要

The evaluation of contaminant net fluxes from the coast to the open sea requires the study of terrige-neous particles behaviour and fate. We studied the particles issued from two small coastal rivers whose waters are mixed with treated wastewater (TWW) coming from the Marseille wastewater treatment plant (WWTP) just before discharge to the Mediterranean Sea. An experimental device was developed and used to investigate particles settling rates, size distribution and metallic contamination when mixing with seawater. The particles were sampled in flood deposits of rivers and outlets during rainy periods and in the outlet water during dry periods. The flood deposits were mainly composed of 50-200 μm-sized particles, higher metals content being observed in the finest fractions. Dry period particles showed the stronger influence of wastewater inputs. Al, Ca, Cs, Li, Rb, Ti, and Tl were mainly of terrigeneous origin, whereas Ag, Ba, Cd, Cr, Cu, Hg, Mg, Mo, Ni, Pb, POC, Sb, Sn and Zn were of anthropogenic origin, issued from non-treated sewage, TWW or industrial waste. In seafloor sediments, all metals exhibited a continuous increase of concentration from the outlet to, at least, 800 m offshore. Implementation of settling particles characteristics in a 3D hydrodynamic and sediment transport model reproduced well the observed deposition of polluted particles in the coastal zone and indicated a non-negligible offshore export of the finest particles and their accompanying pollutants.
机译：对从海岸到公海的污染物净通量的评估需要研究泥质颗粒的行为和结局。我们研究了从两条小型沿海河流中排放的颗粒，这些河流中的水与排放自地中海的马赛废水处理厂（WWTP）产生的已处理废水（TWW）混合在一起。开发了一种实验设备，用于研究与海水混合时的颗粒沉降速率，尺寸分布和金属污染。在雨季期间，在河流和出口的洪水沉积物中采样颗粒，而在干燥时期，则在出口水中采样颗粒。洪水沉积物主要由50-200μm大小的颗粒组成，在最细的部分中观察到较高的金属含量。干燥期颗粒对废水输入的影响更大。 Al，Ca，Cs，Li，Rb，Ti和Tl主要来自陆源，而Ag，Ba，Cd，Cr，Cu，Hg，Mg，Mo，Ni，Pb，POC，Sb，Sn和Zn属于陆源由未经处理的污水，污水处理厂或工业废物产生的人为来源。在海底沉积物中，所有金属的浓度从出口到海上至少800 m处都呈现连续增加的趋势。在3D水动力和泥沙输送模型中实施沉降颗粒特征，可以很好地再现观察到的沿海地区受污染颗粒的沉积情况，并表明不可忽略的最细颗粒及其伴随污染物的近海出口。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2014年第1期|14-26|共13页
  • 作者

    B. Oursel; C. Garnier; I. Pairaud; D. Omanovic; G. Durrieu; A.D. Syakti; C. Le Poupon; B. Thouvenin; Y. Lucas;

  • 作者单位

    Universite de Toulon, PROTEE, EA 3819, 83957 La Garde, France;

    Universite de Toulon, PROTEE, EA 3819, 83957 La Garde, France;

    IFREMER, Centre de Mediterranee, Laboratoire Environnement Ressources Provence-Azur-Corse, BP 330, Zone Portuaire de Bregaillon, 83507 La Seyne-sur-Mer, France;

    Ruder Boskovic Institute, Center for Marine and Environmental Research, PO Box 180, 10002 Zagreb, Croatia;

    Universite de Toulon, PROTEE, EA 3819, 83957 La Garde, France;

    Aix Marseille Universite, LCE - FRE 3416, equipe MPO, Europole de l'Arbois, BP 80, 13545 Aix-en-Provence Cedex 4, France,Fisheries and Marine Science Department, Faculty of Sciences and Techniques, University of Jenderal Soedirman, Jl. HR. Boenyamin 708, Purwokerto, Indonesia;

    Universite de Toulon, PROTEE, EA 3819, 83957 La Garde, France;

    IFREMER, Centre de Brest, DYNECO, DYNECO/PHYSED, BP 70, 29280 Plouzane, France;

    Universite de Toulon, PROTEE, EA 3819, 83957 La Garde, France;

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  • 正文语种 eng
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  • 关键词

    particles contamination; urban rivers; coastal zone; TWW; hydro sedimentation modelling;

    机译：颗粒污染;城市河流;沿海地区TWW;水力沉降模拟;

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