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首页> 外文期刊>Environmental toxicology and chemistry >MECHANISTIC SEDIMENT QUALITY GUIDELINES BASED ON CONTAMINANT BIOAVAILABILITY: EQUILIBRIUM PARTITIONING SEDIMENT BENCHMARKS
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MECHANISTIC SEDIMENT QUALITY GUIDELINES BASED ON CONTAMINANT BIOAVAILABILITY: EQUILIBRIUM PARTITIONING SEDIMENT BENCHMARKS

机译：基于污染物生物利用度的机械沉积物质量指南：平衡划分沉积物基准

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摘要

Globally, estimated costs to manage (i.e., remediate and monitor) contaminated sediments are in the billions of U.S. dollars. Biologically based approaches for assessing the contaminated sediments which pose the greatest ecological risk range from toxicity testing to benthic community analysis. In addition, chemically based sediment quality guidelines (SQGs) provide a relatively inexpensive line of evidence for supporting these assessments. The present study summarizes a mechanistic SQG based on equilibrium partitioning (EqP), which uses the dissolved concentrations of contaminants in sediment interstitial waters as a surrogate for bioavailable contaminant concentrations. The EqP-based mechanistic SQGs are called equilibrium partitioning sediment benchmarks (ESBs). Sediment concentrations less than or equal to the ESB values are not expected to result in adverse effects and benthic organisms should be protected, while sediment concentrations above the ESB values may result in adverse effects to benthic organisms. In the present study, ESB values are reported for 34 polycyclic aromatic hydrocarbon, 32 other organic contaminants, and seven metals (cadmium, chromium, copper, nickel, lead, silver, zinc). Also included is an overview of EqP theory, ESB derivation, examples of applying ESB values, and considerations when using ESBs. The ESBs are intended as a complement to existing sediment-assessment tools, to assist in determining the extent of sediment contamination, to help identify chemicals causing toxicity, and to serve as targets for pollutant loading control measures.
机译：在全球范围内，用于管理（即修复和监测）受污染沉积物的估计成本为数十亿美元。从生物方法评估构成最大生态风险的受污染沉积物的方法范围从毒性测试到底栖生物分析。此外，基于化学物质的沉积物质量指南（SQG）提供了相对便宜的证据来支持这些评估。本研究总结了基于平衡分配（EqP）的机械SQG，该方法使用沉积物间隙水中溶解的污染物浓度作为生物可利用污染物浓度的替代物。基于EqP的机械SQG被称为平衡分配沉积物基准（ESB）。预计沉积物浓度小于或等于ESB值不会产生不利影响，应保护底栖生物，而高于ESB值的沉积物浓度可能会对底栖生物产生不利影响。在本研究中，报告了34种多环芳烃，32种其他有机污染物和7种金属（镉，铬，铜，镍，铅，银，锌）的ESB值。还包括EqP理论，ESB派生，应用ESB值的示例以及使用ESB时的注意事项的概述。 ESB旨在补充现有的沉积物评估工具，以帮助确定沉积物污染的程度，帮助识别引起毒性的化学物质，并作为污染物负荷控制措施的目标。

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  • 来源
    《Environmental toxicology and chemistry》 |2013年第1期|102-114|共13页
  • 作者

    Robert M. Burgess; Walter J. Berry; David R. Mount; Dominic M. Di Toro;

  • 作者单位

    U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Atlantic Ecology Division, Narragansett, Rhode Island;

    U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Atlantic Ecology Division, Narragansett, Rhode Island;

    U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, Duluth, Minnesota;

    Department of Civil and Environmental Engineering, University of Delaware, Newark, Delaware, USA;

  • 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

    contaminated sediment; sediment quality guideline; equilibrium partitioning; equilibrium partitioning sediment benchmark; bioavailability;

    机译：受污染的沉积物;沉积物质量准则;平衡分配平衡分配沉积物基准生物利用度;

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