Treatment of perfluoroalkyl acids by heat-activated persulfate under conditions representative of in situ chemical oxidation.

ABSTRACT: Perfluoroalkyl acids (PFAAs) are a class of organic contaminants notable for their extreme persistence. The unique chemical properties of these compounds make them difficult to remove from water using most standard water treatment techniques. To gain insight into the possibility of remediating contaminated groundwater by in situ chemical oxidation with heat-activated persulfate, PFAA removal and the generation of transformation products were evaluated under laboratory conditions. Solution pH had a strong influence on the removal of perfluorooctanoic acid (PFOA), resulting in its transformation into shorter-chain perfluorocarboxylic acids (PFCAs) at pH values below 3. The presence of chloride and aquifer sediments decreased the efficiency of the process by less than 25% under conditions lik

SUBMITTER: Bruton TA 

PROVIDER: S-EPMC6347461 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature