Removal of PFOA and PFOS from water by titanium
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摘要: 针对全氟和多氟化合物（per and polyfluoroalkyl substances，PFASs）中的全氟辛酸（perfluorooctanoic acid，PFOA）和全氟辛烷磺酸（perfluorooctane sulfonate，PFOS）难以自然降解且传统方法并不能有效去除的问题，本研究通过电化学氧化法对全氟化合物进行处理研究。采用电沉积方法制备钛负载纳米银极板，并分别探究极板材料、反应时间、pH值、电流密度等因素对水中PFOA与PFOS去除效果的影响。结果表明：钛板表面负载银后，腐蚀电位提高了0.2 V，抗腐蚀能力显著提高；在pH值为7、反应时间为60 min、电流密度为25 mA/cm2时，PFOA与PFOS的去除率分别为92.7%和94.0%。Abstract: In order to solve the problem that Perfluorooctanoic Acid（PFOA） and Perfluorooctane Sulfonate（PFOS） in the perfluorinated and polyfluoroalkyl substances（PFASs） are difficult to be naturally degraded and impossible effectively removed by traditional methods，this research is aim to using electrochemical method to the treatment of perfluorinated compoundsTitanium supporting nanosilver plates were prepared by electrodeposition methods，and the effects of plate materials，reaction time，pH，current density and other factors on the removal of PFOA and PFOS were explored respectivelyResults demonstrate that the corrosion potential of titanium plate increases by 0.2 V and the corrosion resistance increases remarkably after load silver on the surface of titaniumThe removal rates of PFOA and PFOS are 92.7% and 94% respectively at the same experimental condition of pH 7，reaction time of 60min and current density of 25 mA/cm2
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