%0 journal article
%@ 0304-3894
%A Yang, L., He, L., Xue, J., Ma, Y., Xie, Z., Wu, L., Huang, M., Zhang, Z.

%D 2020
%J Journal of Hazardous Materials

%P 122405 
%R doi:10.1016/j.jhazmat.2020.122405
%T Persulfate-based degradation of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) in aqueous solution: Review on influences, mechanisms and prospective
%U https://doi.org/10.1016/j.jhazmat.2020.122405
 
%X Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) have attracted global attention due to their chemical durability, wide distribution, biotoxicity and bioaccumulative properties. Persulfate is a promising alternative to H2O2 for advanced oxidation processes and effective for organic removal. In this review, persulfate activation methods and operational factors in persulfate-based PFOA / PFOS degradation are analyzed and summarized. Moreover, the decomposing mechanisms of PFOA and PFOS are outlined in terms of molecular structures based a series of proposed pathways. PFOS could be converted to PFOA with the attack of SO4− and OH. And then PFOA defluorination occurs with one CF2 unit missing in each round and the similar procedure would occur continuously with sufficient SO4− and OH until entire decomposition. In addition, several knowledge gaps and research needs for further in-depth studies are identified. This review provides an overview for better understanding of the mechanisms and prospects in persulfate-based degradation of PFOA and PFOS.