Universidad Nacional de General Sarmiento, Gutiérrez 1150, Los Polvorines, Buenos Aires, Argentina.
Environ Sci Pollut Res Int. 2011 Jul;18(6):997-1003. doi: 10.1007/s11356-011-0456-x. Epub 2011 Feb 8.
The aim of the present study is to propose a nonlinear model which provides an indicator for the maximum phytoextraction of metals to help in the decision-making process. Research into different species and strategies plays an important role in the application of phytoextraction techniques to the remediation of contaminated soil. Also, the convenience of species according to their biomass and pollutant accumulation capacities has gained important space in discussions regarding remediation strategies, whether to choose species with low accumulation capacities and high biomass or high accumulation capacities with low biomass.
The effects of heavy metals in soil on plant growth are studied by means of a nonlinear interaction model which relates the dynamics of the uptake of heavy metals by plants to heavy metal deposed in soil.
The model, presented theoretically, provides an indicator for the maximum phytoextraction of metals which depends on adjustable parameters of both the plant and the environmental conditions. Finally, in order to clarify its applicability, a series of experimental results found in the literature are presented to show how the model performs consistently with real data.
The inhibition of plant growth due to heavy metal concentration can be predicted by a simple kinetic model. The model proposed in this study makes it possible to characterize the nonlinear behaviour of the soil-plant interaction with heavy metal pollution in order to establish maximum uptake values for heavy metals in the harvestable part of plants.
本研究旨在提出一种非线性模型，为金属的最大植物提取提供指标，以帮助决策过程。不同物种和策略的研究在将植物提取技术应用于污染土壤修复中起着重要作用。此外，根据生物量和污染物积累能力选择方便的物种，在修复策略的讨论中也占据了重要地位，无论是选择积累能力低但生物量大的物种，还是选择积累能力高但生物量低的物种。
通过非线性相互作用模型研究土壤中重金属对植物生长的影响，该模型将植物对重金属的吸收动力学与土壤中重金属的沉积联系起来。
该模型从理论上提供了一个金属最大植物提取的指标，该指标取决于植物和环境条件的可调参数。最后，为了说明其适用性，本文提出了一系列文献中的实验结果，表明模型如何与真实数据一致地表现。
重金属浓度对植物生长的抑制可以通过简单的动力学模型来预测。本研究提出的模型可以描述重金属污染土壤-植物相互作用的非线性行为，以便确定植物可收获部分中重金属的最大吸收值。
