TRANSPORT BEHAVIOR AND REACTIVITY OF NANOSCALE ZERO VALENT IRON STABILIZED WITH CARBOXYMETHYLCELLULOSE SIMULATED UNDER AQUIFER CONDITIONS IN 1-D REACTOR
This study investigates the transport behavior of CMC-nZVI in 1-D reactor under simulated aquifer conditions through the application of breakthrough curve analysis. The CMC-nZVI will be injected into a 30 cm long borosilicate glass column at a rate of ~ 100 mL min-1 and flushed with a 10 mM NaCl solution at a velocity of 1 m/d. Breakthrough curves based on conductivity measurements before and after CMC-nZVI injection will be helpful in characterizing changes in the hydraulic properties of the porous medium due to H2 evolution or entrapment of iron though the application of CXTFIT, a solute transport modeling software. The analysis of effluent samples from the column for ferrous iron, total iron, and nZVI using a spectrophotometric technique (phenanthroline method for iron determination) will determine the mass retained. Analysis of hydrogen gas (H2) using gas chromatography will be used to evaluate the longevity or the lifespan of CMC-nZVI upon injection through evolution of H2.