Perfluoroalkyl and polyfluoroalkyl substances removal in a full-scale tropical constructed wetland system treating landfill leachate

Water Research
Tingru YinKarina Yew-Hoong Gin

Abstract

Landfill leachate is often an important source of emerging organic contaminants including perfluoroalkyl and polyfluoroalkyl substances (PFASs) requiring proper treatment to protect surface water and groundwater resources. This study investigated the occurrence of PFASs in the leachate of a capped landfill site in Singapore and the efficacy of PFASs removal during flow through a constructed wetland (CW) treatment system. The CW treatment system consists of equalization tank, aeration lagoons, sedimentation tank, reed beds and polishing ponds. Target compounds included 11 perfluoroalkyl acids (PFAAs) (7 perfluoroalkyl carboxylic acids (PFCAs) and 4 perfluoroalkane sulfonates (PFSAs)) and 7 PFAA precursors. Although total PFASs concentrations in the leachate varied widely (1269 to 7661 ng/L) over the one-year sampling period, the PFASs composition remained relatively stable with PFCAs consistently being predominant (64.0 ± 3.8%). Perfluorobutane sulfonate (PFBS) concentrations were highly correlated with total PFASs concentrations and could be an indicator for the release of PFASs from this landfill. The release of short-chain PFAAs strongly depended on precipitation whereas concentrations of the other PFASs appeared to be contro...Continue Reading

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Citations

Aug 4, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Edith Martinez-GuerraVeera Gnaneswar Gude
Feb 18, 2020·Journal of Environmental Management·Reza Mahinroosta, Lalantha Senevirathna
Feb 20, 2020·Chemosphere·Amir GholipourAlexandros I Stefanakis
Apr 2, 2021·Environmental Toxicology and Chemistry·Manjurul Islam ChowdhuryMallavarapu Megharaj
Jul 30, 2021·Journal of Environmental Management·Sridhar PilliRajeshwar Dayal Tyagi
Aug 17, 2021·The Science of the Total Environment·Muhammad Arslan, Mohamed Gamal El-Din
Jul 4, 2019·Environmental Science & Technology·Lianguo ChenBingsheng Zhou

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