Advanced treatment technologies efficacies and mechanism of per- and poly-fluoroalkyl substances removal from water

Mohammad Boshir Ahmed, Md Masruck Alam, John L. Zhou, Bentuo Xu, Md Abu Hasan Johir, Aneek Krishna Karmakar, Md Saifur Rahman, Jewel Hossen, A. T.M.Kamrul Hasan, Mohammad Ali Moni

Research output: Contribution to journalReview articlepeer-review

90 Citations (Scopus)

Abstract

The increasing occurrence of chemically resistant per- and poly-fluoroalkyl substances (PFASs) in the natural environment, animal tissues and even the human body poses a significant health risk. Temporal trend studies on water, sediments, bird, fish, marine mammal and the human show that the exposure of PFAS has significantly increased over the last 20–30 years. Different physical, biological and chemical treatment processes have been investigated for PFAS removal from water. However, there is a lack of detailed understating of the mechanism of removal by different methods, especially by different advanced chemical treatment processes. This article reviews PFASs removal efficacy and mechanism by the advanced chemical treatment methods from aqueous solution. Review shows that several advanced oxidation processes (e.g., electrochemical oxidation, activated persulfate oxidation, photocatalysis, UV-induced oxidation) are successful in degrading PFASs. Moreover, defluorination treatment, some thermal and non-thermal degradation processes are also found to be prominent for the degradation of PFASs with some limitations including process costs over physical treatment (e.g., sorption), production of toxic by-products and greenhouse gases. Finally, knowledge gaps concerning the advanced chemical treatment of PFASs are discussed.
Original languageEnglish
Pages (from-to)1-14
Number of pages14
JournalProcess Safety and Environmental Protection
Volume136
Early online dateJan 2020
DOIs
Publication statusPublished - Apr 2020

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