| Abstract |
| Perfluorooctanesulfonic acid (PFOS), one of poly- and perfluoroalkyl acids has been receiving increasing attention from environmental scientists and public health communities due to its wide distribution, persistence, bioaccumulation, and potentially negative health impact. Research presented here focused on evaluating the effectiveness of four potential in-situ amenable technologies, based on persulfate (PS) oxidation approaches with the addition of another probing oxidant or catalysts for PFOS removal. These were the use of hydrogen peroxide with PS, Fenton reaction with PS, nano zero valent iron-activated PS, and alkali-activated PS. In this study, neither the use of hydrogen peroxide or PS oxidants were not able to decompose PFOS, but showed PFOS removal through volatilization. Similarly, Fenton reaction with PS also showed PFOS volatilization due to exothermic reaction. Nano zero valent iron-activated PS also showed PFOS removal, due to its adsorption onto the surface of zero valent iron, but not due to decomposition. Lastly, alkali-activated PS did not induce PFOS attack by the diverse radicals generated such as sulfate, hydroxyl and oxygen radicals. The four types of PS-based oxidation technologies assessed here failed to decompose PFOS by oxidation. However, they showed PFOS removal due to volatilization or adsorption. |
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| Key Words |
| Adsorption, Oxidation, Perfluorooctanesulfonic acid, Persulfate, Removal, Volatilization, 흡착, 산화, 과불화옥탄술폰산, 과황산염, 제거, 증발 |
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