A numerical model to simulate the NAPL source zone remediation by injecting zero-valent iron nanoparticles

Tsakiroglou, Christos D.; Sikinioti-Lock, Alexandra; Terzi, Katerina; Θεοδωροπούλου, Μαρία

doi:10.1016/j.ces.2018.07.037

Cited by 15 publications

(8 citation statements)

References 58 publications

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“…However, there is still a lack in comprehensive numerical model to predict the transport and remediation associated with nZVI particles. Currently, only a few comprehensive numerical models has been developed (Tosco and Sethi 2010;O 'Carroll et al 2013;Tosco et al 2014a;Chowdhury et al 2015;Bianco et al 2016;Babakhani et al 2017;Tsakiroglou et al 2018), and the main model to predict nanoparticle transport and remediation is based on the colloid filtration theory (CFT) (Krol et al 2013), which is incorporated into the advection-dispersion equation:…”

Section: Injection Of Particular Solidsmentioning

confidence: 99%

In Situ Chemical Reduction of Chlorinated Organic Compounds

Rodrigues

Betelu

Colombano

et al. 2020

Applied Environmental Science and Engineering for a Sustainable Future

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Chlorinated organic compounds (COCs) are common anthropogenic contaminants of soil and groundwater. COCs were industrially produced for different applications, such as dry cleaning, degreasing, or as pesticides. The presence of COCs in the environment is a major concern because of their toxicity and persistence.The most widely used method for their remediation is the conventional pump-and-treat system. However, this technology can hardly achieve a complete remediation because of geological characteristics and the presence of pore space pollution/adsorbed pollution, leading to a residual saturation. Hence, in addition to the improvement of pump-and-treat systems, in situ chemical processes have been largely developed. These chemical processes involve the injection of chemical reagents for the removal of residual source pollution and/or the treatment of plume contamination. Chemical degradation of COCs can be achieved by oxidative or reductive processes. If chemical oxidation has been first developed for in situ application, chemical reduction is one of the most important emerging remediation techniques for COCs treatment. Due to the electronegative character of chlorine substituents, COCs can effectively be transformed via reductive pathways. Moreover, reductive dechlorination has shown higher efficiency on highly chlorinated compounds. This chapter focuses on the presentation of the chemical reduction of the most common COCs pollutants, followed by kinetic and mechanistic approaches related to the use of iron-based particles. Developments on in situ chemical reduction technologies in order to enhance remediation rates are also exposed. Influence of environmental conditions for in situ applications is then developed. Finally, a case study is presented.

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Section: Injection Of Particular Solidsmentioning

confidence: 99%

In Situ Chemical Reduction of Chlorinated Organic Compounds

Rodrigues

Betelu

Colombano

et al. 2020

Applied Environmental Science and Engineering for a Sustainable Future

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“…The theoretical framework commonly used to predict colloid transport and deposition through porous media is the deep bed filtration, where the particle 1123 (2022) 012064 IOP Publishing doi:10.1088/1755-1315/1123/1/012064 2 transport is governed by the interactions of several mechanisms [8]: interception, inertial impaction, sedimentation, and Brownian diffusion. Modeling nanoparticle transport during their injection in porous media is of key importance for the interpretation of lab-scale tests and design of efficient field-scale applications [9][10][11][12]. The particle deposition on pore-walls is governed by chemical (attachment/detachment, blocking, and ripening), physical (mechanical filtration), and physicochemica l (straining) mechanisms [13,14] depending strongly on ionic strength and pH [15].…”

Section: Introductionmentioning

confidence: 99%

“…The particle deposition on pore-walls is governed by chemical (attachment/detachment, blocking, and ripening), physical (mechanical filtration), and physicochemica l (straining) mechanisms [13,14] depending strongly on ionic strength and pH [15]. Ripening and straining can often lead to a progressive clogging of the porous medium, and therefore the hydrodynamic parameters and fluid properties cannot be considered separately from the concentration of deposited and suspended particles [3,12].…”

Section: Introductionmentioning

confidence: 99%

Polymer-functionalized nanoparticles as agents for the in situ remediation of oil-contaminated soils

Ntente

Strekla

Iatridi

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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In-situ flushing of chemicals, such as nanoparticle (NP) suspensions, and NP-based Pickering emulsions, is a well-promising method for the remediation of soils and aquifers contaminated with non-aqueous phase liquids (NAPLs) and the enhanced oil recovery from reservoir rocks. Linear and comb-type copolymers were synthesized by combining (i) hydrophilic, anionic monomers like 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPSA) and acrylic acid (AA) with (ii) hydrophobic monomers like dodecyl methacrylate (DMA). Moreover, polymer-coated nanoparticles (PNPs) was prepared by post-grafting and surface initiated free radical polymerization (FRP) on commercial silica nanoparticles. Dilute dispersions of polymers and PNPs were mixed with salts (NaCl, CaCl2), their dynamic surface and oil/water interfacial tensions were measured by the pendant drop method, and the wettability of all fluid systems to glass surface was quantified by measuring the contact angle. Oil-in-water Pickering emulsions were prepared by dispersing n-dodecane in polymers and n-decane in PNP-colloid with ultrasound probe, and their stability was evaluated by tracking the phase separation and changes of rheological properties, as functions of time. Furthermore, the most stable polymers and PNP-based dispersions and emulsions were chosen and tested as chemicals for the removal of residual oil from a transparent glass-etched pore network.

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“…continuum models, i.e., advection-dispersion-reaction equations describing bulk mass transport over continuous spatial domains [21,25,26], NP life cycle assessment (LCA) which is a comprehensive modelling framework used to assess environmental and human health impacts of nanomaterials [27,28], and abstract models including material flow analysis (MFA) or multi-media models (MMM) which are based on the mass balance principle at global and local scales [3,[29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%