Perfluorooctanoic acid transport and fate difference driven by iron-sulfide minerals transformation interacting with different types of groundwater,Journal of Hazardous Materials

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Perfluorooctanoic acid transport and fate difference driven by iron-sulfide minerals transformation interacting with different types of groundwater
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2024-09-08 , DOI: 10.1016/j.jhazmat.2024.135785
Yongkang Wei ₁ , Wenbing Wang ₁ , Qianling Dong ₁ , Qifeng Fan ₁ , Meng Zhang ₁ , Chunyang Li ₁ , Hui Li ₁

Affiliation

Perfluorooctanoic acid (PFOA) is an emerging persistent organic pollutant that threatens human health and ecosystems. However, the intricate mechanism of the change in PFOA transport behavior that interacts with FexSy minerals under groundwater-type differences is not clear. To address this knowledge gap, multi-scale experiments and multi-process reaction models were constructed to investigate the underlying mechanisms. The results showed that different groundwater (NO3-, Cl--Na+, SO42-, and HCO3- types) had significant effects on PFOA transport. NO3-, Cl--Na+, SO42-, and HCO3- decreased the retardation effect of PFOA in the FexSy media. Compared to other groundwater types, the adsorption sites of FexSy were the least occupied in the NO3- groundwater. This observation was supported by the least inhabition of λ in FexSy-NO3- interaction system, which demonstrated that more PFOA was in a high reaction zone and electrostatic repulsion was weakest. The surface tension of different ion types in groundwater provided evidence explaining the lowest inhibition in the FexSy-NO3- system. The 2D spatiotemporal evolution results showed that in FexSy with NO3- system, the pollutant flux (6.00 ×10−5 mg·(m2·s)−1) was minimal. The pollutant flux in the SO42- groundwater system was 9.95-fold that in FexSy with the NO3- groundwater. These findings provide theoretical support for understanding the transport and fate of PFOA in FexSy transformations that interact with different types of groundwater.

中文翻译：

全氟辛酸迁移和命运差异是由硫化铁矿物转化与不同类型地下水相互作用驱动的

全氟辛酸（PFOA）是一种新兴的持久性有机污染物，威胁着人类健康和生态系统。然而，在地下水类型差异下，与 FexSy 矿物相互作用的 PFOA 运输行为变化的复杂机制尚不清楚。为了解决这一知识差距，构建了多尺度实验和多过程反应模型来研究其潜在机制。结果表明，不同的地下水（NO3-、Cl--Na+、SO42- 和 HCO3- 类型）对 PFOA 的迁移有显著影响。NO3- 、Cl--Na+、SO42- 和 HCO3- 降低了 PFOA 在 FexSy 培养基中的阻滞作用。与其他地下水类型相比，FexSy 在 NO3- 地下水中被占用的位点最少。FexSy-NO3- 相互作用系统中 λ 最少的支持了这一观察结果，这表明更多的 PFOA 位于高反应区，静电排斥力最弱。地下水中不同离子类型的表面张力提供了解释 FexSy-NO3- 系统中最低抑制的证据。二维时空演化结果表明，在具有 NO3- 体系的 FexSy 中，污染物通量（6.00 ×10−5 mg·（m2·s）−1）最小。SO42- 地下水系统中的污染物通量是 FexSy 中 NO3- 地下水的 9.95 倍。这些发现为理解 PFOA 在与不同类型地下水相互作用的 FexSy 转化中的运输和归宿提供了理论支持。

更新日期：2024-09-08

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