...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Two-Compartment Kinetic Modeling of Radiocesium Accumulation in Marine Bivalves under Hypothetical Exposure Regimes
【24h】

Two-Compartment Kinetic Modeling of Radiocesium Accumulation in Marine Bivalves under Hypothetical Exposure Regimes

机译：假设暴露条件下海洋双壳类动物ces吸收的两室动力学模型

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

Interpreting the variable concentrations of ~(137)Cs in the field biological samples requires mechanistic understanding of both environmental and biological behavior of ~(137)Cs. In this study, we used a two-compartment model to estimate and compare the ~(137)Cs biokinetics in three species of subtropical marine bivalves. Significant interspecific difference of ~(137)Cs biokinetics was observed among oysters, mussels, and scallops. There was considerable ~(137)Cs assimilation from phytoplankton in the bivalves, but the calculated trophic transfer factors were generally between 0.04 and 0.4. We demonstrated a major efflux of radiocesium in the scallops (with a rate constant of 0.207 d~(-1)), whereas the efflux was comparable between oysters and mussels (0.035-0.038 d~(-1)). A two-compartment kinetic model was developed to simulate the ~(137)Cs accumulation in the three bivalves under four hypothetical exposure regimes. We showed that the bivalves respond differently to the exposure regimes in terms of time to reach equilibrium, equilibrium concentration, and maximum concentration. Bivalves suffering more frequent intermittent exposure may have higher maximum concentrations than those receiving less frequent exposure. The interspecific difference of ~(137)Cs accumulation in bivalves has important implications for biomonitoring and implementing management techniques. This study represents one of the first attempts to combine both dissolved and dietary pathways to give a realistic simulation of ~(137)Cs accumulation in marine bivalves under dynamic exposure regimes.
机译：解释现场生物样品中〜（137）Cs的可变浓度需要对〜（137）Cs的环境和生物学行为进行机械理解。在这项研究中，我们使用两室模型来估计和比较三种亚热带海洋双壳类动物的〜（137）Cs生物动力学。在牡蛎，贻贝和扇贝之间观察到〜（137）Cs生物动力学的种间差异显着。双壳类中浮游植物有相当多的〜（137）Cs同化，但计算的营养传递因子通常在0.04至0.4之间。我们证明了扇贝中放射性铯的主要外排量（速率常数为0.207 d〜（-1）），而牡蛎和贻贝之间的外排量相当（0.035-0.038 d〜（-1））。建立了一个两室动力学模型，以模拟在四个假设暴露方案下三个双壳类动物中〜（137）Cs的积累。我们表明，双壳类动物在达到平衡，平衡浓度和最大浓度的时间方面对暴露方式的反应不同。与频繁接触的双壳类动物相比，间歇暴露的最大浓度可能更高。双壳类中〜（137）Cs积累的种间差异对生物监测和实施管理技术具有重要意义。这项研究代表了首次尝试结合溶解途径和饮食途径，以模拟在动态暴露条件下海洋双壳类动物中〜（137）Cs的积累。

著录项

  • 来源
    《Environmental Science & Technology》 |2016年第5期|2677-2684|共8页
  • 作者

    Ke Pan; Qiao-Guo Tan; Wen-Xiong Wang;

  • 作者单位

    Division of Life Science, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong,HKUST Shenzhen Research Institute, Shenzhen 518057, China;

    Key Laboratory of the Coastal & Wetland Ecosystems, Ministry of Education, College of the Environment & Ecology, Xiamen University, Xiamen, Fujian 361102, China;

    Division of Life Science, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong,HKUST Shenzhen Research Institute, Shenzhen 518057, China;

  • 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