Removal of short- and long-chain perfluorinated compounds from surface water by coagulation

IF 0.8 4区工程技术 Q4 ENGINEERING, CHEMICAL

Membrane Water Treatment Pub Date : 2021-07-01 DOI:10.12989/MWT.2021.12.4.187

Ji-Won Park, J. Noh, S. Yoon, Samiya, B. Choi, Gyoo-Bum Kim, H. Oh, S. Maeng

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引用次数: 2

Abstract

Per- and poly-fluorinated compounds (PFCs) are persistently found during drinking water treatment processes, which can also be found in tap water. However, the mechanisms for removing PFCs during drinking water treatment processes have not been fully understood. In this study, we investigated the effect of coagulation on the removal of short- and long-chain PFCs. The PFCs mixture (C5–C10) resulted in a lower removal efficacy via coagulation treatment, and the average removals of selected PFCs were found to be below 5%. Only long-chain perfluorodecanoic acid (PFDA) (C10) and perfluorooctanesulfonic acid (PFOS) were significantly removed via coagulation. The removals of suspended particles and bacterial cells via coagulation were correlated with the reduction of PFDA and PFOS. However, higher turbidity, humic substances, and biopolymers in the source water were found to significantly reduce the removal efficiency of PFDA and PFOS, resulting in insignificant changes between the PFC species. We concluded that coagulation was not effective in removing selected PFCs, hence, a multiple-barrier treatment strategy is needed for PFC removal.

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混凝法去除地表水中的短链和长链全氟化合物

全氟和多氟化合物（PFCs）在饮用水处理过程中一直存在，在自来水中也可以发现。然而，在饮用水处理过程中去除全氟氯化碳的机制尚未完全了解。在本研究中，我们研究了混凝对去除短链和长链PFCs的影响。通过混凝处理，PFCs混合物（C5–C10）的去除效果较低，并且所选PFCs的平均去除率低于5%。只有长链全氟辛酸（PFDA）（C10）和全氟辛烷磺酸（PFOS）通过混凝显著去除。通过混凝去除悬浮颗粒和细菌细胞与PFDA和PFOS的减少相关。然而，发现水源水中较高的浊度、腐殖物质和生物聚合物显著降低了PFDA和PFOS的去除效率，导致PFC物种之间的变化不显著。我们得出的结论是，凝血不能有效去除选定的PFCs，因此，需要采用多重屏障治疗策略来去除PFC。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Membrane Water Treatment ENGINEERING, CHEMICAL-WATER RESOURCES

CiteScore

1.90

自引率

30.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Membrane and Water Treatment(MWT), An International Journal, aims at opening an access to the valuable source of technical information and providing an excellent publication channel for the global community of researchers in Membrane and Water Treatment related area. Specific emphasis of the journal may include but not limited to; the engineering and scientific aspects of understanding the basic mechanisms and applying membranes for water and waste water treatment, such as transport phenomena, surface characteristics, fouling, scaling, desalination, membrane bioreactors, water reuse, and system optimization.