A chelating agent in an adequate dose used to enhance phytoremediation of radionuclide-contaminated soil should not inhibit the growth of the plant. If this constraint condition is satisfied, the total bioaccumulation amount (TBA) of radionuclide by the plant can be maximized. This is a constrained optimization problem to determine the adequate dose of the chelating agent for phytoremediation of radionuclide-contaminated soil. In this research, an adequate dose of a chelating agent for phytoremediation of radionuclide-contaminated soil was determined by a novel approach using pot experiments. The proposed approach was applied to specify the adequate doses of citric acid (CA) and S,S-ethylenediamine disuccinic acid (EDDS) for phytoremediation of uranium contaminated soil by M. Cordata. By using this method, the adequate doses of CA and EDDS for phytoremediation of ²³⁸U, ²³²Th and ²²⁶Ra contaminated soils by M. cordata were measures as 10.0 and 5.0 mmol kg⁻¹, respectively. The results showed that the approach could be used to establish the adequate dose of a chelating agent for phytoremediation of radionuclide or other toxic heavy metal contaminated soil by a plant.

足够剂量的螯合剂用于增强被放射性核素污染的土壤的植物修复，不应抑制植物的生长。如果满足该约束条件，则植物的放射性核素的总生物累积量（TBA）可以最大化。这是确定用于放射性污染的土壤的植物修复的螯合剂的适当剂量的最优化问题。在这项研究中，通过盆栽试验的新方法确定了用于植物修复放射性核素污染土壤的螯合剂的适当剂量。拟议的方法被用于指定适当剂量的柠檬酸（CA）和S，S-乙二胺二琥珀酸（EDDS）用于M.Cordata对植物的铀污染土壤的植物修复。。通过使用这种方法，所述足够剂量的CA和EDDS用于植物修复²³⁸ U，²³² Th和²²⁶太阳神污染土壤由M.鱼腥草分别措施10.0和5.0毫摩尔千克^-1分别。结果表明，该方法可用于建立适当剂量的螯合剂，用于植物对放射性核素或其他有毒重金属污染的土壤进行植物修复。