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首页> 外文期刊>Environmental toxicology and chemistry >Investigating the mechanics of multimedia box models: how to explain differences between models in terms of mass fluxes?
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Investigating the mechanics of multimedia box models: how to explain differences between models in terms of mass fluxes?

机译：研究多媒体盒模型的机制：如何用质量通量解释模型之间的差异？

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摘要

The simple mathematical structure of multimedia fate models makes it possible to change the process descriptions and geometry of such models relatively easily. With different versions of a model, the effect of a process or compartment that is included in one version of the model but excluded in another version can be investigated. Here, a new method for performing such a model comparison in a quantitative way is presented. Based on the mass balances for the two model versions, it can be shown that, for a compartment contained in both model versions, the difference between a chemical's concentrations in this compartment is related directly to the difference in those mass fluxes that have different rate constants in the two models. Moreover, it is possible to identify the contributions to the concentration difference that stem from individual mass fluxes so that the concentration difference can be tracked back to specific differences in the process descriptions of the two models. This flux analysis method is illustrated with two versions of a unit-world model, one with and one without a vegetation compartment. With DDT and six polychlorinated biphenyl (PCB) congeners as example chemicals, the differences of the chemicals' concentrations in air and soil caused by the vegetation compartment are explained by using the flux analysis method. The future potential of the method for comparing not only versions of the same model but also models of different structure is discussed.
机译：多媒体命运模型的简单数学结构使得可以相对容易地更改此类模型的过程描述和几何形状。使用不同版本的模型，可以研究模型的一个版本中包含但另一个版本中不包含的过程或隔离专区的效果。这里，提出了一种用于以定量方式执行这种模型比较的新方法。基于两个模型版本的质量平衡，可以证明，对于两个模型版本中包含的隔室，该隔室中化学物质浓度之间的差异直接与速率常数不同的那些质量通量的差异有关。在两个模型中。此外，可以识别出来自各个质量通量的浓度差的贡献，从而可以将浓度差追溯到两个模型的过程描述中的特定差。通过两种版本的单位世界模型说明了这种通量分析方法，一种版本带有植被区，一种版本没有植被区。以DDT和六种多氯联苯（PCB）同类物为例，通过通量分析法解释了植被区室引起的空气和土壤中化学品浓度的差异。讨论了不仅用于比较相同模型的版本，而且还用于比较不同结构的模型的方法的未来潜力。

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