Adsorption isotherm and column breakthrough experiments evaluating trichloroethylene (TCE) adsorption onto granular activated carbon (GAC) were conducted in the presence and absence of Fe2O3 nanoparticles (NPs) and Humic Acid (HA). The zeta potential of Fe2O3 NPs was analyzed in the presence and absence of HA. Particle size distribution (PSD) of the NPs dispersions was analyzed as a function of time to evaluate the extent of aggregation. Transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) analyses were conducted to study the fate and transport of the Fe2O3 NPs. Equilibrium isotherm studies have shown no significant effect of the presence of NPs on the adsorption of TCE in the absence of HA. While the presence of Fe2O3 NPs and HA decreased the amount of TCE adsorbed in the column breakthrough studies implying competitive inhibition through pores blockage. The zeta potential, concentration, and PSD of NPs were key parameters for TCE removal.
ASJC Scopus subject areas
- Chemical Engineering(all)