Highly efficient, versatile, adsorbent, nanoscale zero-valent iron (NZVI) was synthesised and encapsulated by an anionic polymer to make it a mobile delivery vehicle (DV-NZVI) for in-situ groundwater and soil remediation. NZVI was found to be highly dispersed with surfactant within a size of 1–100 nm. Laboratory column experiments were conducted by employing glass beads as a porous medium to delineate the characteristics of DV-NZVI transport as a reactive material in saturated zones under a number of conditions. It was observed that there was an optimum concentration of polymer, i.e. 6 g/L, for maximum transport of DV-NZVI, at which point, as the flow rate increases, the transport of DV-NZVI increases. Similarly, at the optimum concentration we observed that as the depth of porous media increased, the breakthrough of DV-NZVI was retarded. These results confirmed that DV-NZVI has significant potential for use as a colloidal reactive barrier material in deep groundwater systems in lieu of pump and treat approaches and conventional permeable reactive barriers (PRB).
Transport characteristics of surface-modified nanoscale zero-valent iron in porous media
S.R. Kanel, H. Choi; Transport characteristics of surface-modified nanoscale zero-valent iron in porous media. Water Sci Technol 1 January 2007; 55 (1-2): 157–162. doi: https://doi.org/10.2166/wst.2007.002
Download citation file:
Impact Factor 1.915
CiteScore 3.3 • Q2
13 days from submission to first decision on average