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首页> 外文期刊>Journal of great lakes research >The Lake Michigan contaminant transport and fate model, LM2-toxic: Development, overview, and application
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The Lake Michigan contaminant transport and fate model, LM2-toxic: Development, overview, and application

机译：密歇根湖污染物运移和归宿模型，LM2毒性：开发，概述和应用

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摘要

The Lake Michigan contaminant transport and fate model LM2-Toxic was developed to gain a better understanding of PCB cycling dynamics and to predict environmental exposure concentrations of 54 polychlorinated biphenyl (PCB) congeners in Lake Michigan water and sediment from 1994 to 2055 as a function of a variety of forcing functions including constant conditions, continued recovery forecasts, and load reduction scenarios. LM2-Toxic couples the organic carbon sorbent and chemical dynamics conceptualized for a natural water system. Based on 1994-1995 model results, a mass budget analysis showed that air-water exchange was the most important mass transfer process. Volatilization was the largest PCB loss and gas absorption was the largest PCB input to Lake Michigan. Model-predicted environmental exposure concentrations suggest that the water quality criterion for protection of wildlife (0.074 ng/L) and human health (0.026 ng/L) will be attained in approximately 2018 and 2045, respectively, based on a slow recovery scenario. For this scenario, atmospheric components, including vapor phase concentration and wet and dry particulate loadings, were assumed to decline with a 20 year half-life, and tributary loadings were assumed to decline with a 13 year half-life.
机译：密歇根湖污染物迁移和归宿模型LM2-Toxic的开发是为了更好地了解PCB循环动力学并预测1994年至2055年密歇根湖水和沉积物中54种多氯联苯（PCB）同类物的环境暴露浓度与各种强制功能，包括恒定条件，连续恢复预测和负载减少方案。 LM2-Toxic结合了有机碳吸附剂和为自然水系统设计的化学动力学。根据1994-1995年的模型结果，大量预算分析表明，空气-水交换是最重要的质量转移过程。挥发是最大的PCB损失，而气体吸收是最大的向密歇根湖输入的PCB。根据模型预测的环境暴露浓度，基于缓慢恢复的情景，分别在大约2018年和2045年将达到保护野生生物（0.074 ng / L）和人类健康（0.026 ng / L）的水质标准。在这种情况下，假定大气成分（包括气相浓度和干，湿颗粒物负荷）以20年半衰期降低，而支流负荷以13年半衰期降低。

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  • 来源
    《Journal of great lakes research》 |2009年第1期|128-136|共9页
  • 作者

    Xiaomi Zhang; Kenneth R. Rygwelski; Ronald Rossmann;

  • 作者单位

    Z-Tech, an ICF International Company, Large Lakes Research Station, 9311 Groh Road, Crosse He, MI 48138, USA;

    U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division,Large Lakes and Rivers Forecasting Research Branch, Large Lakes Research Station, 9311 Croh Road, Crosse He, MI 48138, USA;

    U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division,Large Lakes and Rivers Forecasting Research Branch, Large Lakes Research Station, 9311 Croh Road, Crosse He, MI 48138, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Lake Michigan; fate and transport model; PCBs; organic carbon; multimedia interaction; forecast;

    机译：密歇根湖命运与运输模型PCBs有机碳多媒体交互预测;

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