Controlled Deposition of Particles in Porous Media for Effective Aquifer Nanoremediation.

ABSTRACT: In this study, a model assisted strategy is developed to control the distribution of colloids in porous media in the framework of nanoremediation, an innovative environmental nanotechnology aimed at reclaiming contaminated aquifers. This approach is exemplified by the delivery of humic acid-stabilized iron oxide nanoparticles (FeOx), a typical reagent for in situ immobilization of heavy metals. By tuned sequential injections of FeOx suspensions and of solutions containing a destabilizing agent (i.e. calcium or magnesium), the two fronts, which advance at different rates, overlap at the target location (i.e., the central portion) of the porous systems. Here, the particles deposit and accumulate irreversibly, creating a reactive zone. An analytical expression predicting the position of the c

SUBMITTER: Bianco C 

PROVIDER: S-EPMC5636825 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature