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LONG-TERM INVESTIGATION ON THE REMOVAL OF PERFLUOROALKYL SUBSTANCES IN A FULL-SCALE DRINKING WATER TREATMENT PLANT IN THE VENETO REGION, ITALY
Bertanza, G., G.U. Capoferri, M. Carmagnani, F. Icarelli, S. Sorlini, and R. Pedrazzani.
Science of The Total Environment 734:139154(2020)

PFAS-contaminated groundwater in a ~ 200 km2 area was treated at a drinking water treatment plant (flowrate = 30,000 m3/d; 100,000 people served) equipped with granular activated carbon filters. Plant performance was measured by processing ~17,000 analytical data points over five years. PFBA was the first compound to attain breakthrough, followed by PFPeA, PFHxA, PFBS, and PFOA. The adsorption capacity and treated bed volumes at complete breakthrough ranged from 1.71 g/t and 7100 (PFBA) to 24.6 g/t and 50,900 (PFOA). The overall adsorption capacity was ~40 g of total PFAS/t. PFAS breakthrough behavior correlated with C-F chain length, the type of hydrophilic head, and the n-octanol/water partition coefficients logP and logD.



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