Transport of silver nanoparticles (AgNPs) in soil

Sagee, O.; Dror, Ishai; Berkowitz, Brian

doi:10.1016/j.chemosphere.2012.03.055

Cited by 144 publications

(105 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Humic and fulvic acids, which have negative surface charges, increase the nAg stability in an aqueous solution and amplify the mobility of nAg. They also immobilize silver chloride anions and contribute to the change in their physicochemical properties (Peralta-Videa et al 2011, Sagee et al 2012. Similar effects of the Ag-NPs agglomeration are observed when the Ca 2+ or Na + solutions are added into the nAg solution.…”

Section: Nanosilversupporting

confidence: 53%

Inorganic nanomaterials in the aquatic environment: behavior, toxicity, and interaction with environmental elements

Krzyżewska¹,

Kyzioł-Komosińska²,

Rosik-Dulewska³

et al. 2016

Archives of Environmental Protection

View full text Add to dashboard Cite

Abstract:The aim of this paper is to present characteristics, toxicity and environmental behavior of nanoparticles (NPs) (silver, copper, gold, zinc oxide, titanium dioxide, iron oxide) that most frequently occur in consumer products. In addition, NPs are addressed as the new aquatic environmental pollutant of the 21 st century. NPs are adsorbed onto particles in the aquatic systems (clay minerals, fulvic and humic acids), or they can adsorb environmental pollutants (heavy metal ions, organic compounds). Nanosilver (nAg) is released from consumer products into the aquatic environment. It can threaten aquatic organisms with high toxicity. Interestingly, copper nanoparticles (Cu-NPs) demonstrate higher toxicity to bacteria and aquatic microorganisms than those of nanosilver nAg. Their small size and reactivity can cause penetration into the tissues and interfere with the metabolic systems of living organisms and bacterial biogeochemical cycles. The behavior of NPs is not fully recognized. Nevertheless, it is known that NPs can agglomerate, bind with ions (chlorides, sulphates, phosphates) or organic compounds. They can also be bound or immobilized by slurry. The NPs behavior depends on process conditions, i.e. pH, ionic strength, temperature and presence of other chemical compounds. It is unknown how NPs behave in the aquatic environment. Therefore, the research on this problem should be carried out under different process conditions. As for the toxicity, it is important to understand where the differences in the research results come from. As NPs have an impact on not only aquatic organisms but also human health and life, it is necessary to recognize their toxic doses and know standards/regulations that determine the permissible concentrations of NPs in the environment.Unauthenticated Download Date | 5/12/18 7:36 AM

show abstract

Section: Nanosilversupporting

confidence: 53%

Inorganic nanomaterials in the aquatic environment: behavior, toxicity, and interaction with environmental elements

Krzyżewska¹,

Kyzioł-Komosińska²,

Rosik-Dulewska³

et al. 2016

Archives of Environmental Protection

View full text Add to dashboard Cite

show abstract

“…Other studies, such as those by Cornelis et al (2013) and Sagee et al (2012), also reported similarly large variations between natural soil columns.…”

Section: Transport and Retention Of Agnps Through Saturated And Unsatmentioning

confidence: 72%

“…Liang et al (2013a) observed a significant retardation in breakthrough curves (BTCs) and hyperexponential RPs of AgNPs in natural (undisturbed) soils. Sagee et al (2012) reported high mobility and early breakthrough of AgNPs in a disturbed sandy clay soil. They found that mechanical straining and chemical interactions between AgNPs and the soil surfaces played key roles in retention of AgNPs.…”

Section: Introductionmentioning

confidence: 99%

“…For example, recent batch studies have shown that the retention of NPs in natural soils is correlated with the clay content (Cornelis et al, 2012). Simple porous media are not able to account for the complexity and heterogeneity (such as a wide particle size distribution, irregular grain shapes, variations in surface chemical heterogeneity, and a complex pore structure) of natural soils (Sagee et al, 2012;Liang et al, 2013a).…”

Section: Introductionmentioning

confidence: 99%

“…The information on the fate and behavior of AgNPs in soils will ultimately determine the environmental risk of AgNPs applications. Only recently, have some studies involving the transport of AgNPs in intact soil columns been conducted (Nowack and Bucheli, 2007;Sagee et al, 2012;Cornelis et al, 2013;Liang et al, 2013a;Braun et al, 2015). Neukum et al (2014) suggested that the transport of AgNPs in sandstones is affected by the pore size distribution, mineralogy, and solution chemistry.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transport of silver nanoparticles in intact columns of calcareous soils: The role of flow conditions and soil texture

et al. 2018

View full text Add to dashboard Cite

A B S T R A C TGrowing production of manufactured nanomaterials has increased the possibility of contamination of groundwater resources and soils by nanoparticles (NPs). It is crucial to study the fate of NPs in subsurface porous media in order to evaluate and control their risks to ecosystems and human health. Hence, this study was conducted to investigate the transport and retention of polyvinylpyrrolidone (PVP) stabilized silver nanoparticles (AgNPs, a diameter of 40 nm) under saturated and unsaturated conditions in intact columns of two calcareous sandy loam (TR) and loam (ZR) soils. Furthermore, similar experiments were conducted using sand quartz as a reference medium. A pulse of the AgNP suspension with an input concentration (C 0 ) of 50 mg L −1 was injected into the columns for 3 pore volumes. The transport of bromide (Br), as a non-reactive inert tracer, was also examined. High mobility of AgNPs was observed through the sand columns due to unfavorable conditions for AgNP deposition on the quartz sand surfaces. Nearly all AgNPs introduced into the columns of both soils were retained in the soil. Percentages of AgNPs leached out of the columns were < 1% of the total injected mass in both soils. Hyperexponential retention profiles (RPs) were observed in both soils and maximum concentrations of 100-130 mg kg −1 were determined near the columns' inlet. However, slightly stronger retention of AgNPs and greater maximum retained concentrations on the solid phase (S max ) in the ZR soil compared with the TR soil may be attributed to smaller grain sizes of the ZR soil. Hydrodynamic forces adjacent to the solid surfaces near the column inlet can provide a viable explanation for the hyperexponential shape of RPs. The one-site kinetic attachment model in HYDRUS-1D, which accounted for time-and depth-dependent retention, was successfully used to analyze the retention of AgNPs. The results showed that the degree of saturation had little effect on the mobility of AgNPs through undisturbed soil columns. Our results suggested the limited transport of AgNPs in neutral/alkaline calcareous soils under both saturated and unsaturated conditions.

show abstract

Predicting colloid transport through saturated porous media: A critical review

et al. 2015

View full text Add to dashboard Cite

Understanding and predicting colloid transport and retention in water‐saturated porous media is important for the protection of human and ecological health. Early applications of colloid transport research before the 1990s included the removal of pathogens in granular drinking water filters. Since then, interest has expanded significantly to include such areas as source zone protection of drinking water systems and injection of nanometals for contaminated site remediation. This review summarizes predictive tools for colloid transport from the pore to field scales. First, we review experimental breakthrough and retention of colloids under favorable and unfavorable colloid/collector interactions (i.e., no significant and significant colloid‐surface repulsion, respectively). Second, we review the continuum‐scale modeling strategies used to describe observed transport behavior. Third, we review the following two components of colloid filtration theory: (i) mechanistic force/torque balance models of pore‐scale colloid trajectories and (ii) approximating correlation equations used to predict colloid retention. The successes and limitations of these approaches for favorable conditions are summarized, as are recent developments to predict colloid retention under the unfavorable conditions particularly relevant to environmental applications. Fourth, we summarize the influences of physical and chemical heterogeneities on colloid transport and avenues for their prediction. Fifth, we review the upscaling of mechanistic model results to rate constants for use in continuum models of colloid behavior at the column and field scales. Overall, this paper clarifies the foundation for existing knowledge of colloid transport and retention, features recent advances in the field, critically assesses where existing approaches are successful and the limits of their application, and highlights outstanding challenges and future research opportunities. These challenges and opportunities include improving mechanistic descriptions, and subsequent correlation equations, for nanoparticle (i.e., Brownian particle) transport through soil, developing mechanistic descriptions of colloid retention in so‐called “unfavorable” conditions via methods such as the “discrete heterogeneity” approach, and employing imaging techniques such as X‐ray tomography to develop realistic expressions for grain topology and mineral distribution that can aid the development of these mechanistic approaches.

show abstract

Transport of silver nanoparticles (AgNPs) in soil

Cited by 144 publications

References 39 publications

Inorganic nanomaterials in the aquatic environment: behavior, toxicity, and interaction with environmental elements

Inorganic nanomaterials in the aquatic environment: behavior, toxicity, and interaction with environmental elements

Transport of silver nanoparticles in intact columns of calcareous soils: The role of flow conditions and soil texture

Predicting colloid transport through saturated porous media: A critical review

Contact Info

Product

Resources

About