Iron (hydr)oxide minerals-microbe interaction associated retention capacity boost and reaction rate fluctuation for perfluorooctanoic acid in an in-situ iron-based and microbe-based sustained-release system

IF 9.7 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Journal of Cleaner Production Pub Date : 2024-11-13 DOI:10.1016/j.jclepro.2024.144221

Chunyang Li, Qifeng Fan, Tiantian Gong, Hui Li, Yongkang Wei, Wenbing Wang

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引用次数: 0

Abstract

Based on the inefficient elimination of emerging contaminant perfluorooctanoic acid (PFOA) and the unpredictable performance of the filed-scale system, a novel in-situ iron-based and microbe-based sustained-release system and filed-scale model were developed to address the above issues in this study.

Especially, the PFOA-microbe-mineral interaction in various types of groundwater and the relevant mechanism were quantitatively and deeply studied. The results showed that the sustained-release interaction system in HCO₃⁻ type groundwater exhibited a greater retardation effect (K_d = 0.73 cm³ g⁻¹) on PFOA compared to the interaction system under no ions condition (K_d = 0.49 cm³ g⁻¹) or microbe system (K_d = 0.43 cm³ g⁻¹). Moreover, the reaction rate λ of PFOA exhibited minimal fluctuation in HCO₃⁻ type groundwater, indicating lower competition from HCO₃⁻ ions for occupancy site and resulting in less PFOA repulsed to the lower reactive region (with lower Fe²⁺ and microorganism cells concentrations). Furthermore, the retardation effect for PFOA was boosted by secondary minerals-microbe interaction and joint adsorption. HCO₃⁻ facilitated the minerals-microbes interaction, leading to increased formation of β-FeOOH and improved retardation effect for PFOA. Additionally, the functional microorganisms Pseudomonas and Delftia were combined to drive the Fe³⁺/Fe²⁺ cycle and PFOA biochemical transformation. The two-dimensional spatiotemporal evolution simulation results showed that pollutant flux (transport risk) of PFOA in HCO₃⁻ type groundwater system (0.124 × 10⁻³ mg·(m²·s)⁻¹) can be reduced by 23.0% compared to that in NO₃⁻ type groundwater system (0.161 × 10⁻³ mg·(m²·s)⁻¹). This study quantitatively revealed the coupling effect of minerals, microbes, and ions on PFOA, contributing to optimizing the sustained-release system for effectively remediating different types of PFOA-contaminated groundwater.

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铁（水）氧化物矿物-微生物相互作用与原位铁基和微生物缓释系统中全氟辛酸保留能力的提高和反应速率的波动有关

针对新出现的污染物全氟辛酸（PFOA）去除效率低、备案规模系统性能难以预测等问题，本研究建立了一种新型的铁基和微生物基原位持续释放系统和备案规模模型，特别是对各类地下水中PFOA-微生物-矿物质相互作用及其相关机理进行了定量和深入研究。结果表明，与无离子条件下的相互作用体系（Kd = 0.49 cm3-g-1）或微生物体系（Kd = 0.43 cm3-g-1）相比，HCO3-型地下水中的持续释放相互作用体系对PFOA具有更大的缓释作用（Kd = 0.73 cm3-g-1）。此外，PFOA 的反应速率 λ 在 HCO3- 型地下水中的波动极小，这表明 HCO3- 离子对占据位点的竞争较小，导致较少的 PFOA 被排斥到较低的反应区（Fe2+ 和微生物细胞浓度较低）。此外，矿物与微生物之间的次生相互作用和联合吸附也增强了对 PFOA 的阻滞作用。HCO3- 促进了矿物与微生物之间的相互作用，增加了 β-FeOOH 的形成，提高了对 PFOA 的阻滞效果。此外，功能微生物假单胞菌（Pseudomonas）和蝶形花（Delftia）的结合推动了 Fe3+/Fe2+ 循环和 PFOA 的生化转化。二维时空演化模拟结果表明，与 NO3 型地下水系统（0.161×10-3 mg-（m2-s）-1）相比，HCO3 型地下水系统（0.124×10-3 mg-（m2-s）-1）中 PFOA 的污染物通量（迁移风险）可降低 23.0%。该研究定量揭示了矿物质、微生物和离子对全氟辛酸的耦合效应，有助于优化缓释系统，有效修复不同类型的全氟辛酸污染地下水。

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来源期刊

Journal of Cleaner Production 环境科学-工程：环境

CiteScore

20.40

自引率

9.00%

发文量

4720

审稿时长

111 days

期刊介绍： The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.