Indexed on: 22 Jan '20Published on: 17 Jan '20Published in: Integrated Environmental Assessment and Management
Adsorption of polycyclic aromatic hydrocarbons (PAHs) on root surfaces has essential impacts on PAH phytoremediation. An iron plaque is commonly formed on the root surface of aquatic plants. Therefore, it is worth investigating the impact of the iron 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 iron plaque, removed iron plaque, and removed iron plaque and lipids. Our results showed that iron 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 iron plaque on PAH adsorption during phytoremediation. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.