Adsorption of polycyclic aromatic hydrocarbons (PAHs) on root surfaces has essential impacts on PAH phytoremediation. An Fe plaque is commonly formed on the root surface of aquatic plants. Therefore, it is worth investigating the impact of the Fe plaque on PAH adsorption on rice root surfaces. Using Bayesian linear water–methanol cosolvent models, we estimated accurate water–biosorbent partition coefficient values for phenanthrene, pyrene, and benzo[a]pyrene between water and rice root biosorbent fractions, including rice root materials with Fe plaque, removed Fe plaque, and removed Fe plaque and lipids. Our results showed that Fe plaque inhibited the adsorption of PAHs on rice root surface; the inhibition impacts increased with hydrophobicity of PAHs. This result highlights the need for considering the impact of Fe plaque on PAH adsorption during phytoremediation. Integr Environ Assess Manag 2020;16:392–399. © 2020 SETAC

中文翻译：

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铁斑块可防止水稻（Oryza sativa）根表面上多环芳烃的分配。

根表面上多环芳烃（PAH）的吸附对PAH的植物修复具有重要影响。铁斑通常形成在水生植物的根表面上。因此，有必要研究铁斑对稻根表面PAH吸附的影响。使用贝叶斯线性水-甲醇共溶剂模型，我们估算了菲，pyr和苯并[ a]的准确的水-生物吸附剂分配系数值。水和稻根生物吸附剂级分之间的py，包括带有铁斑的稻根物质，去除了铁斑，以及去除了铁斑和脂质。我们的研究结果表明，铁斑块抑制了PAHs在水稻根表面的吸附。抑制作用随PAHs疏水性的增加而增加。该结果强调了在植物修复过程中需要考虑铁斑对PAH吸附的影响。Integr环境评估管理2020； 16：392–399。©2020 SETAC