首页> 外文期刊>Science of the total environment >Spatial and temporal trends in PCBs in sediment along the lower Rhone River, France
【24h】

Spatial and temporal trends in PCBs in sediment along the lower Rhone River, France

机译:法国罗纳河下游沉积物中多氯联苯的时空趋势

获取原文
获取原文并翻译 | 示例
       

摘要

Despite increasingly strict control of polychlorinated biphenyl (PCB) releases in France since the mid-1970s, PCB contamination offish recently has emerged as a major concern in the lower Rhone River basin. We measured PCB concentrations in Rhone sediment to evaluate the effects of PCB releases from major urban and industrial areas, sediment redistribution by large floods, and regulatory controls on PCB trends from 1970 to present. Profiles of PCBs (the sum of seven indicator PCB congeners) were reconstructed from sediment cores collected from an off-river rural reference site and from three depositional areas along the Rhone upstream and downstream from the city of Lyon, France. Core chronology was determined from radionuclide profiles and flood deposits. PCB concentrations increased progressively in the downstream direction, and reached a maximum concentration in 1991 of 281ug/kg at the most downstream site. At the rural reference site and at the upstream Rhone site, PCB concentrations peaked in the 1970s (maximum concentration of 13 and 78μg/kg, respectively) and have decreased exponentially since then. PCB concentrations in the middle and downstream cores were elevated into the early 1990s, decreased very rapidly until 2000, and since then have remained relatively stable. Congener profiles for three time windows (1965-80, 1986-93, and 2000-08) were similar in the three sediment cores from the Rhone and different from those at the rural reference site. The results indicate that permitted discharges from a hazardous-waste treatment facility upstream from Lyon might have contributed to high concentrations into the 1980-90s, but that industrial discharges from the greater Lyon area and tributaries to the Rhone near Lyon have had a greater contribution since the 1990s. There is little indication that PCB concentration in sediments downstream from Lyon will decrease over at least the short term.
机译:尽管自1970年代中期以来法国对多氯联苯(PCB)排放的控制越来越严格,但鱼类的PCB污染最近已成为罗纳河下游流域的主要问题。我们测量了罗纳河沉积物中的PCB浓度,以评估从主要城市和工业区释放的PCB,大洪水造成的沉积物再分配以及从1970年至今对PCB趋势的监管控制的影响。多氯联苯的概况(七个指示性多氯联苯同源物的总和)是根据从偏远农村参考点和法国里昂市罗纳河上游和下游的三个沉积区收集的沉积物芯重建的。核心年代从放射性核素剖面和洪水沉积物中确定。多氯联苯的浓度沿下游方向逐渐增加,并在1991年最下游的最高浓度达到281ug / kg。在农村参考点和罗纳河上游站点,PCB浓度在1970年代达到峰值(最大浓度分别为13和78μg/ kg),此后呈指数下降。到1990年代初,中部和下游岩心中的PCB浓度一直呈上升趋势,直到2000年才迅速下降,此后一直保持相对稳定。三个时间窗口(1965-80、1986-93和2000-08)的同类物分布在罗纳河的三个沉积岩心中相似,而在农村参考点则不同。结果表明,在里昂上游的危险废物处理设施所允许的排放可能在1980-90年代造成了高浓度的排放,但是自那以后,从里昂更大的地区和支流到里昂附近的罗纳河的工业排放贡献更大。 1990年代。几乎没有迹象表明里昂下游沉积物中的PCB浓度至少会在短期内下降。

著录项

  • 来源
    《Science of the total environment》 |2012年第1期|p.189-197|共9页
  • 作者单位

    EA 6293 GeHCO Universite Francois-Rabelais de Tours, Pare de Crandmont, 37200 Tours, France;

    University Lyon 1, UMR 5023 Ecologie des Hydrosystemes Naturels et Anthropish, ENTPE, CNRS, 3, Rue Maurice Audin, 69518 Vaulx-en-Velin, France;

    U.S. Geological Survey, 1505 Ferguson Lane, Austin, TX 78754, USA;

    U.S. Geological Survey, 1505 Ferguson Lane, Austin, TX 78754, USA;

    University Lyon 1, UMR 5023 Ecologie des Hydrosystemes Naturels et Anthropish, ENTPE, CNRS, 3, Rue Maurice Audin, 69518 Vaulx-en-Velin, France;

    Universite de Lyon, UMR 5023 Ecologie des Hydrosystemes Naturels et Anthropises, Universite Lyon 1, ENTPE, CNRS, 5 rue Raphael Dubois, 69221 Villeurbanne, France;

    UMR 8212, LSCE, Bat. 12, avenue de la Terrasse, F-91198 Gif-sur-Yvette Cedex, France;

    Irstea, UR MALY, 3 bis Quai Chauveau, CP220, F-69336 Lyon, France;

    UMR CNRS 6113 - ISTO, Universite d'Orleans, Campus Geosciences, 1A rue de la Ferollerie, F-45071 Orleans, France;

    UMR CNRS 6113 - ISTO, Universite d'Orleans, Campus Geosciences, 1A rue de la Ferollerie, F-45071 Orleans, France;

    Irstea, UR MALY, 3 bis Quai Chauveau, CP220, F-69336 Lyon, France;

    Irstea, UR MALY, 3 bis Quai Chauveau, CP220, F-69336 Lyon, France;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    polychlorinated biphenyl (PCB); sediment core; rhone river; spatial and temporal trends;

    机译:多氯联苯(PCB);沉积物芯罗纳河时空趋势;
  • 入库时间 2022-08-17 13:54:48

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号