Carbonate minerals in porous media decrease mobility of polyacrylic acid modified zero-valent iron nanoparticles used for groundwater remediation

Laumann, Susanne; Micić, Vesna; Lowry, Gregory V.; Hofmann, Thilo

doi:10.1016/j.envpol.2013.04.004

Cited by 73 publications

(37 citation statements)

References 51 publications

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“…The following hydrochemical and hydrogeological properties can significantly influence mobility, reaction rates, "electron efficiency" and particle aging of nZVI: pH-value (Liu and Lowry, 2006;Song and Carraway, 2005;Xie and Cwiertny, 2012), redox potential (Dolfing et al, 2008;Shi et al, 2011), applied mass of Fe 0 (Arnold and Roberts, 2000;Cwiertny and Roberts, 2005;Song and Carraway, 2008;Tratnyek and Johnson, 2006), contaminant concentration (Liu et al, 2007), ionic strength and specific water constituents (Bi et al, 2009;Liu et al, 2007;Reinsch et al, 2010;Yu et al, 2012), oxygen concentration (Reinsch et al, 2010;Xie and Cwiertny, 2010), reaction temperature (Yang et al, 2002), concentration of (dissolved) organics (Bouayed et al, 1998;Chen et al, 2011;Doong and Lai, 2006;Johnson et al, 2009;Tratnyek et al, 2001;Tsang et al, 2009) and the concentration of metal-ions in solution (Doong and Lai, 2006). Organic materials such as polyacrylic acid (Laumann et al, 2013) and carboxymethylcellulose (Johnson et al, 2013) are commonly used to increase particle mobility in the underground, but they can block reactive particle sites (Tratnyek et al, 2001) and consequently decrease electron transfer (Bouayed et al, 1998). On the other hand quinones can increase electron transfer (Doong and Lai, 2006;Tratnyek et al, 2001;Xie and Shang, 2005).…”

Section: Introductionmentioning

confidence: 99%

Electron efficiency of nZVI does not change with variation of environmental parameters

Schöftner

Waldner

Lottermoser

et al. 2015

Science of The Total Environment

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Section: Introductionmentioning

confidence: 99%

Electron efficiency of nZVI does not change with variation of environmental parameters

Schöftner

Waldner

Lottermoser

et al. 2015

Science of The Total Environment

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“…These heterogeneities and the associated heterogeneous charge distributions are identified as having a major influence on the transport of colloidal particles in subsurface porous media. 1– 4 …”

Section: Introductionmentioning

confidence: 99%

Impact of Sodium Humate Coating on Collector Surfaces on Deposition of Polymer-Coated Nanoiron Particles

Micić

Schmid

Bossa

et al. 2017

Environ. Sci. Technol.

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The affinity between nanoscale zerovalent iron (nano-ZVI) and mineral surfaces hinders its mobility, and hence its delivery into contaminated aquifers. We have tested the hypothesis that the attachment of poly(acrylic acid)-coated nano-ZVI (PAA-nano-ZVI) to mineral surfaces could be limited by coating such surfaces with sodium (Na) humate prior to PAA-nano-ZVI injection. Na humate was expected to form a coating over favorable sites for PAA-nano-ZVI attachment and hence reduce the affinity of PAA-nano-ZVI for the collector surfaces through electrosteric repulsion between the two interpenetrating charged polymers. Column experiments demonstrated that a low concentration (10 mg/L) Na humate solution in synthetic water significantly improved the mobility of PAA-nano-ZVI within a standard sand medium. This effect was, however, reduced in more heterogeneous natural collector media from contaminated sites, as not an adequate amount of the collector sites favorable for PAA-nano-ZVI attachment within these media appear to have been screened by the Na humate. Na humate did not interact with the surfaces of acid-washed glass beads or standard Ottawa sand, which presented less surface heterogeneity. Important factors influencing the effectiveness of Na humate application in improving PAA-nano-ZVI mobility include the solution chemistry, the Na humate concentration, and the collector properties.

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“…Currently there are limited studies that investigate the effects of complex solution chemistry found in groundwater and surface water environments on the stability and behavior of ENMs (Bennett et al, 2013;Laumann et al, 2013). Moreover, there are only two other studies that have been published that investigate the transport of GONPs specifically in porous media and they were under idealized conditions (e.g., in the presence of a monovalent salt such as KCl or NaCl) (Feriancikova and Xu, 2012).…”

Section: Introductionmentioning

confidence: 99%

Stability and Transport of Graphene Oxide Nanoparticles in Groundwater and Surface Water

Lanphere

Rogers

Luth

et al. 2014

Environmental Engineering Science

127

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The effects of groundwater and surface water constituents (i.e., natural organic matter [NOM] and the presence of a complex assortment of ions) on graphene oxide nanoparticles (GONPs) were investigated to provide additional insight into the factors contributing to fate and the mechanisms involved in their transport in soil, groundwater, and surface water environments. The stability and transport of GONPs was investigated using dynamic light scattering, electrokinetic characterization, and packed bed column experiments. Stability results showed that the hydrodynamic diameter of the GONPs at a similar ionic strength (2.1 -1.1 mM) was 10 times greater in groundwater environments compared with surface water and NaCl and MgCl 2 suspensions. Transport results confirmed that in groundwater, GONPs are less stable and are more likely to be removed during transport in porous media. In surface water and MgCl 2 and NaCl suspensions, the relative recovery was 94% -3% indicating that GONPs will be very mobile in surface waters. Additional experiments were carried out in monovalent (KCl) and divalent (CaCl 2 ) salts across an environmentally relevant concentration range (0.1-10 mg/L) of NOM using Suwannee River humic acid. Overall, the transport and stability of GONPs was increased in the presence of NOM. This study confirms that planar ''carbonaceous-oxide'' materials follow traditional theory for stability and transport, both due to their response to ionic strength, valence, and NOM presence and is the first to look at GONP transport across a wide range of representative conditions found in surface and groundwater environments.

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Carbonate minerals in porous media decrease mobility of polyacrylic acid modified zero-valent iron nanoparticles used for groundwater remediation

Cited by 73 publications

References 51 publications

Electron efficiency of nZVI does not change with variation of environmental parameters

Electron efficiency of nZVI does not change with variation of environmental parameters

Impact of Sodium Humate Coating on Collector Surfaces on Deposition of Polymer-Coated Nanoiron Particles

Stability and Transport of Graphene Oxide Nanoparticles in Groundwater and Surface Water

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