Nano zero valent iron (NZVI), one of the most common nanoparticle, is used for the rapid removal of pollutants in the subsurface environment. In groundwater, dense non-aqueous phase liquids (DNAPLs) is ubiquitous contaminants and has been the focus of considerable attention over the past decades. Trichloroethylene (TCE), as one representative of DNAPLs, removal from contaminated groundwater is quite difficult in compliance with the heterogeneity of natural porous medium systems and the complexity of TCE flow patterns and mass transfer limitations. Permeable reactive barrier (PRB) is the most successful in situ technique to remediate groundwater that was contaminated by DNAPLs. To better understand the pollutants removal and mobility of NZVI which are excellent to degrade DNAPL in the subsurface, a micro-model, and an artificial two-dimensional porous medium capable of simulating a natural porous medium, has been used to characterize and quantify the DNAPL removal and mobilization of NZVI in the groundwater aquifer. However, fate and transport of NZVI for DNAPL removal in the porous media has never been studied using micro-model. In this research, TCE DNAPL blob removal using NZVI was investigated by visualization of experimental results in a glass micro-model through optical microscope. Further to summarize the interest of nanoparticles in the applications in situ remediation, thereby current state-of-the-art and challenges.

Direct observation of interactive behavior for DNAPL-NZVI in porous media

251st National Meeting (2016)

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