Journal ArticleDOI
Trajectory analysis of deep‐bed filtration with the sphere‐in‐cell porous media model
Rajamani Rajagopalan,Chi Tien +1 more
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TLDR
In this paper, a model for the initial particle deposition in a deepbed filter with a sphere-in-cell porous media model was presented, and the results indicated that deposition occurs under favorable surface interactions.Abstract:
This paper presents a model for the initial particle deposition in a deepbed filter with a sphere-in-cell porous media model used. The analysis includes all the relevant mechanisms, and the results indicate that deposition occurs under favorable surface interactions. A semiempirical expression relating collection efficiency and operating parameters is presented.read more
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Journal ArticleDOI
Colloid mobilization and transport in groundwater
TL;DR: In this paper, the authors present theories describing colloid mobilization, deposition, and transport, laboratory experiments in model systems designed to test these theories, and applications of these theories to colloid-facilitated transport experiments in natural groundwater systems.
Journal ArticleDOI
Correlation equation for predicting single-collector efficiency in physicochemical filtration in saturated porous media.
TL;DR: The resulting equation overcomes the limitations of current approaches and shows remarkable agreement with exact theoretical predictions of the single-collector efficiency over a wide range of conditions commonly encountered in natural and engineered aquatic systems.
Journal ArticleDOI
Aggregation and deposition of engineered nanomaterials in aquatic environments: role of physicochemical interactions.
TL;DR: In this review, colloidal forces governing nanoparticle deposition and aggregation are outlined, and essential equations used to assess particle-particle and particle-surface interactions, along with Hamaker constants for specific nanoparticles and the attributes exclusive to nanoscale particle interactions, are described.
Journal ArticleDOI
Field assessment of nanoscale bimetallic particles for groundwater treatment.
Daniel W. Elliott,Wei-xian Zhang +1 more
TL;DR: A field demonstration was performed in which nanoscale bimetallic particles were gravity-fed into groundwater contaminated by trichloroethene and other chlorinated aliphatic hydrocarbons at a manufacturing site, showing rapid dechlorination of target chlorinated compounds accompanied by a sharp decrease of standard oxidation potential and an increase in pH.
Book ChapterDOI
Mobile Subsurface Colloids and Their Role in Contaminant Transport
TL;DR: A review of the current state of knowledge about the behavior of colloids in porous media and their role in contaminant transport can be found in this paper, where the authors identify some important future research needs.