AWWA WQTC71428

This powerpoint presentation begins by providing a brief overview of the presence of nanoparticles (NPs) in water. The primary objective of this study was to examine how three commercially available nanomaterials (TiO2, SiO2, Fe2O3) impact the removal of Trichloroethylene (TCE) by activated carbon adsorption. Specific objectives included: nanoparticles characteristics, characterizing particle size distribution (PSD) zeta potential and pH_pzc; isotherm experiment; and, breakthrough studies - virgin and spent granular activated carbon (GAC) analysis. Materials and methods included: nanomaterials - Titania - 30 nm, Iron Oxide - 20 to 40 nm, Silica - 20 nm; adsorbates - TCE & Humic acid, adsorbents - Filterasorb 400 (F-400), and organic-free water - autoclaved DI water, buffered with 0.01M KH₂PO₄, pH adjusted to 7 with 10M solution of NaOH. Analytical instrumentation and experimental setup are presented, and conclusions are provided for electrokinetics, adsorption kinetics, and column breakthrough. Includes tables, figures.