Surface Complexation and Packed Bed Mass Transport Models Enable Adsorbent Design for Arsenate and Vanadate Removal.

ABSTRACT: Co-occurrence of metal oxo-anions (e.g., arsenate) in drinking water pose human health risks. To understand and predict competition and breakthrough for individual or mixtures of oxo-anions in continuous-flow packed bed adsorption systems, we linked equilibrium surface complexation models (SCMs) with a Pore Surface Diffusion Model (PSDM). After parameterization using data for two commercial adsorbents, the SCM and PSDM predicted well the adsorption isotherm data and column breakthrough curves, respectively, for single-solute (arsenate) and bi-solute water chemistries (arsenate, vanadate) as well as chromatographic displacement of previously adsorbed arsenate by vanadate. Surface- and pore- diffusivities for both commercial adsorbents were 3.0 to 3.5 x10^-12 cm²/s and 1

SUBMITTER: Briese E 

PROVIDER: S-EPMC11698511 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature