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Adsorption Of Perfluorooctanoic Acid (Pfoa) And Perfluorooctanesulfonic Acid (Pfos) By Aluminum-Based Drinking Water Treatment Residuals, Zhiming Zhang, Dibyendu Sarkar, Rupali Datta, Yang Deng
Adsorption Of Perfluorooctanoic Acid (Pfoa) And Perfluorooctanesulfonic Acid (Pfos) By Aluminum-Based Drinking Water Treatment Residuals, Zhiming Zhang, Dibyendu Sarkar, Rupali Datta, Yang Deng
Michigan Tech Publications
Per- and polyfluoroalkyl substances (PFAS) represent a family of emerging persistent organic pollutants. Cost-effective remediation of PFAS contamination via chemical or biochemical degradation is challenging due to their extremely high stability. This study reports the removal of two representative PFAS species, perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), from water by adsorption using aluminum-based water treatment residuals (Al-WTR), a non-hazardous waste generated during the process of drinking water treatment by alum salts. Rapid adsorption of PFOA and PFOS onto Al-WTR followed a pseudo 2nd order kinetic pattern. Lower pH facilitated the adsorption process with a faster adsorption rate and greater …