Perfluoroalkyl chemical adsorption by granular activated carbon: Assessment of particle size impact on equilibrium parameters and associated rapid small-scale column test scaling assumptions.

ABSTRACT: Single-solute batch kinetic and isotherm experiments were conducted in Type 1 (18.2 MΩ·cm resistivity) water supplemented with 10 mM carbonate buffer (pH 7.75, 25 °C) for nine drinking water relevant perfluoroalkyl chemicals and three bituminous-coal based granular activated carbons (GACs). Except for perfluorooctane sulfonic acid (PFOS), mass transfer was well represented by a film diffusion model, which estimated a film diffusion coefficient (k_L). For PFOS, a batch pore and surface diffusion model better represented the data and allowed estimation of both k_L and a surface diffusion coefficient (D_s). Adsorption was well described by the Freundlich isotherm, and for a given perfluoroalkyl chemical at equilibrium, the three GACs showed similar solid phase de

SUBMITTER: Abulikemu G 

PROVIDER: S-EPMC11873665 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature