Bushey Joseph T, Ebbs Stephen D, Dzombak David A
Department of Civil and Environmental Engineering, Syracuse University, Syracuse, New York, USA.
Int J Phytoremediation. 2006;8(1):25-43. doi: 10.1080/15226510500507151.
A model for cyanide species uptake by willow (Salix eriocephala L. var. Michaux) was developed to interpret data from hydroponic experiments quantitatively. While the potential for cyanide phytoremediation has been demonstrated modeling will aid in determining plant processes that contribute to cyanide transport and metabolism in willow and will target specific physiological parameters for field-scale phytoremediation design and optimization. The objective of the model development was to gain insight into the relative role of different processes with respect to dissolved free and iron-complexed cyanide transport and assimilation in plants and to determine rates at which these processes occur within the willow plant under the experimental conditions. A physiologically-based model describing plant uptake, transport, and metabolism of cyanide species was developed to reflect the processes that influence the movement of cyanide into and throughout the plant. Plant compartmentalization (root, stem, and leaf) corresponded to the level of detail in the data collected via hydroponic experiments. Inclusion of more detailed intra- and intercellular processes would create a model inconsistent with the macroscale nature of the data. Mass balances around each compartment were developed via kinetic representations for the mass transfer processes and were combined to form a model describing the fate of cyanide species within plant-water systems.
开发了一个用于柳树（Salix eriocephala L. var. Michaux）吸收氰化物的模型，以定量解释水培实验数据。虽然氰化物植物修复的潜力已得到证明，但建模将有助于确定柳树中有助于氰化物运输和代谢的植物过程，并将针对田间规模植物修复设计和优化的特定生理参数。模型开发的目的是深入了解不同过程在植物中溶解的游离氰化物和铁络合氰化物运输及同化方面的相对作用，并确定在实验条件下柳树植物体内这些过程发生的速率。开发了一个基于生理学的模型，描述植物对氰化物的吸收、运输和代谢，以反映影响氰化物进入植物并在植物体内移动的过程。植物区室化（根、茎和叶）与通过水培实验收集的数据的详细程度相对应。纳入更详细的细胞内和细胞间过程将创建一个与数据的宏观性质不一致的模型。通过传质过程的动力学表示法建立了每个区室周围的质量平衡，并将其组合形成一个描述植物 - 水系统中氰化物归宿的模型。
