...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Oceanic Sink and Biogeochemical Controls on the Accumulation of Polychlorinated Dibenzo-p-dioxins, Dibenzofurans, and Biphenyls in Plankton
【24h】

Oceanic Sink and Biogeochemical Controls on the Accumulation of Polychlorinated Dibenzo-p-dioxins, Dibenzofurans, and Biphenyls in Plankton

机译：海洋水槽和生物地球化学对浮游生物中多氯联苯对二恶英，二苯并呋喃和联苯积累的控制

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs) were measured in plankton samples from the Atlantic, Pacific, and Indian Oceans collected during the Malaspina circumnavigation cruise. The concentrations of PCDD/Fs and dl-PCBs in plankton averaged 14 and 240 pg g_(dw)~(-1), respectively, but concentrations were highly variable. The global distribution of PCDD/Fs and dl-PCBs was not driven by proximity to continents but significantly correlated with plankton biomass, with higher plankton phase PCDD/F and dl-PCB concentrations at lower biomass. These trends are consistent with the interactions between atmospheric deposition, biomass dilution, and settling fluxes of organic matter in the water column (biological pump), as key processes driving POPs plankton phase concentrations in the global oceans. The application of a model of the air-water-plankton diffusive exchange reproduces in part the influence of biomass on plankton phase concentrations and suggests future modeling priorities. The estimated oceanic sink (Atlantic, Pacific, and Indian Oceans) due to settling fluxes of organic matter bound PCDD/Fs and dl-PCBs is of 400 and 10,500 kg y~(-1), respectively. The atmospheric inputs due to gross diffusive absorption and dry deposition are nearly 3 and 10 times larger for PCDD/Fs and dl-PCBs, respectively, than the oceanic sink. These observations suggest that the coupling of atmospheric deposition with water column cycling supports and drives the accumulation of dl-PCBs and PCDD/Fs in plankton from the global oligotrophic oceans.
机译：在Malaspina环游航行期间从大西洋，太平洋和印度洋浮游生物样品中测量了多氯二苯并对二恶英和呋喃（PCDD / Fs）和二恶英样多氯联苯（dl-PCBs）。浮游生物中PCDD / Fs和dl-PCBs的平均浓度分别为14和240 pg g_（dw）〜（-1），但浓度变化很大。 PCDD / Fs和dl-PCBs的全球分布不是由靠近大陆驱动的，而是与浮游生物量显着相关，其中浮游生物相PCDD / F和dl-PCB的浓度较低。这些趋势与大气沉积，生物量稀释和水柱（生物泵）中有机物沉降通量之间的相互作用是一致的，这是驱动全球海洋中的POPs浮游生物相浓度的关键过程。空气-水-浮游生物扩散交换模型的应用部分再现了生物量对浮游生物相浓度的影响，并提出了未来的建模重点。由于结合了PCDD / Fs和dl-PCBs的有机物的沉降通量，估计的海洋汇（大西洋，太平洋和印度洋）分别为400和10,500 kg y〜（-1）。 PCDD / Fs和dl-PCBs由于总的扩散吸收和干沉降而产生的大气输入分别比海洋汇大3到10倍。这些观察结果表明，大气沉积与水柱循环的耦合支持并驱动了全球贫营养海洋浮游生物中dl-PCBs和PCDD / Fs的积累。

著录项

  • 来源
    《Environmental Science & Technology》 |2015年第23期|13853-13861|共9页
  • 作者

    Laura Morales; Jordi Dachs; Maria-Carmen Fernandez-Pinos; Naiara Berrojalbiz; Carmen Mompean; Belen Gonzalez-Gaya; Begona Jimenez; Antonio Bode; Manuela Abalos; Esteban Abad;

  • 作者单位

    Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona, Catalunya, Spain;

    Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona, Catalunya, Spain;

    Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona, Catalunya, Spain;

    Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona, Catalunya, Spain;

    A Coruna Oceanographic Center, Spanish Institute of Oceanography, IEO, A Coruna, Galicia, Spain;

    Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona, Catalunya, Spain,Department of Instrumental Analysis and Environmental Chemistry, Institute of Organic Chemistry, IQOG-CSIC, Madrid, Spain;

    Department of Instrumental Analysis and Environmental Chemistry, Institute of Organic Chemistry, IQOG-CSIC, Madrid, Spain;

    A Coruna Oceanographic Center, Spanish Institute of Oceanography, IEO, A Coruna, Galicia, Spain;

    Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona, Catalunya, Spain;

    Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona, Catalunya, Spain;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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