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Membrane Water Treatment
  Volume 12, Number 4, July 2021 , pages 187-194
DOI: https://doi.org/10.12989/mwt.2021.12.4.187
 

Removal of short- and long-chain perfluorinated compounds from surface water by coagulation
Ji Won Park, Jin Hyung Noh, Seon Won Yoon, Samiya, Byeong Gyu Choi, Gyoo-Bum Kim, Heekyong Oh, and Sung Kyu Maeng

 
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.
 
Key Words
    chain length; coagulation; perfluorinated compounds
 
Address
Ji Won Park, Jin Hyung Noh, Seon Won Yoon, Samiya and Sung Kyu Maeng : Department of Civil and Environmental Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea

Byeong Gyu Choi: Water Supply and Sewerage Research Division, Environmental Infrastructure Research Department,
National Institute of Environmental Research, Hwangyong-ro 42, Seogu, Incheon, 22689, Republic of Korea

Gyoo-Bum Kim: 3Department of Construction Safety and Disaster Prevention, Daejeon University, Daehak-ro 62, Dong-gu, Daejeon, 300-716, Republic of Korea

Heekyong Oh: Convergence Technology Research Team, Daewoo Institute of Construction Technology, 170 Eulji-ro, Jung-gu, Seoul, 04548, Republic of Korea

 

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