Release of colloids and their subsequent transport into the subsurface environments takes place during a wide range applications such as industrial, energy storage, agricultural activities. Therefore, processes contributing to transport, attachment, re-mobilization in porous media are attracting attention. A fraction released may cross soil vadose zone reach saturated groundwater. In this study...

In this paper we report experiments on the growth of dry foams and their rise in vertical pipes different circular cross-sectional radii with length over diameter ratios interval 25 ≤ h / D 80 for applications study fracture stimulation enhanced oil recovery processes. Air injection at bottom is performed a constant flow rate by means single capillary tube. The formation rising foam was investi...

Plant transpiration plays a significant role in the terrestrial cycles, but spatiotemporal origins of water used by plant remains highly uncertain. Therefore, missing link to fully characterize mass balance, for any control volume including vegetated surfaces, is identifying and quantifying key factors that age plants. Here, we bring together an age-based (tran-SAS) physically based (HYDRUS-1D)...

A novel mathematical model was developed to describe the transport of nanoparticles in water saturated, homogeneous porous media with uniform flow. The accounts for simultaneous migration and aggregation nanoparticles. are assumed be found suspended aqueous phase or attached reversibly irreversibly onto solid matrix. Derjaguin-Landau-Verwey-Overbeek theory used account possible repulsive intera...

Environmental contamination with aircraft de-icing fluids (ADF) is becoming a concern. Propylene glycol (PG) composes the largest fraction of the ADF most commonly in use in the U.S. The biodegradation of PG and ADF in saturated and unsaturated sand columns was evaluated, in addition to the impact of biodegradation on the hydrodynamic characteristics of the porous media. In studies with unsatur...

Active particles often swim in confined environments. The transport mechanisms, especially the global one as reflected by Taylor dispersion model, are of great practical interest to various applications. For active process flows, previous analytical studies focused on long-time asymptotic values characteristics. Only several numerical preliminarily investigated temporal evolution. Extending rec...

The performance of an in-situ groundwater remediation project is a complicated function of many factors, including subsurface flow rates and patterns, diffusion/dispersion, rate of contamination from the source, retardation and rate of degradation of the contaminant(s), availability of co-reactants for degradation, etc. The complexity of the interactions between these phenomena makes it difficu...

In order to improve the dispersibility of multi-walled carbon nanotubes (MWCNT) in aqueous media, MWCNT were functionalized with tetrahydrofurfuryl polyethylene glycol (TFPEG) in a one-pot, fast and environmentally friendly method. To reduce defects and eliminate the acid-treatment stage, an electrophonic addition reaction under microwave irradiation was employed. Surface functionalization was ...