Figure 2
From: Controlled Deposition of Particles in Porous Media for Effective Aquifer Nanoremediation
Development of the analytical expression for the design of the injection strategy for particle immobilization in the center of a saturated sandy column. (a) Representation of the order of injection for calcium as destabilizing agent, ultrapure water, and FeOx nanoparticles. (b) Condition for the immobilization of the particles in the center of the column, x t = x max /2: mixing of the particle advective front and of a sufficient amount of calcium. (c) Duration of the required ultrapure water pulse calculated using the analytical expression as a function of the immobilization distance and the injected calcium concentration.
