Study of iron oxide nanoparticles in soil for remediation of arsenic

Shipley, Heather J.; Engates, Karen E.; Guettner, Allison M.

doi:10.1007/s11051-010-9999-x

Cited by 125 publications

(44 citation statements)

References 31 publications

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“…More particularly, in fresh water systems, Hematite is found as one of the most abundant iron sources (Buffle et al 1988;Stumm and Morgan 1996). Iron oxides nanoparticles are also willing to be used in many applications such as nanomedicine and imaging (Gupta and Gupta 2005), food industry (Fidler et al 2004), waste water treatment (Cross et al 2009;Perez 2007), and in soil remediation processes (Watts et al 1997;Zhang 2003;Waychunas et al 2005;Shipley et al 2010) to remove chlorinated organic compound, and highly toxic heavy metals such as lead, cadmium, arsenic, etc. Owing to the multitude of potential environmental nanoparticle applications, manufactured nanoparticle quantities which can enter directly the environment are thus important.…”

Section: Introductionmentioning

confidence: 99%

Fulvic acids concentration and pH influence on the stability of hematite nanoparticles in aquatic systems

Palomino

Stoll

2013

J Nanopart Res

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In aquatic systems, fulvic acids (FAs) are expected to play key roles on the stability and aggregation behavior of manufactured nanoparticles (NPs). The exact conditions under which aggregation or dispersion occurs will depend on the nanoparticle surface charge properties, FAs concentration as well as solution conditions, such as pH and ionic strength. The systematic calculation of stability (aggregation versus disaggregation) diagrams is therefore a key aspect in the prediction of the environmental fate and behavior of manufactured nanoparticles in aquatic systems. In this study, the responses to changes in pH and FAs concentrations on the resulting surface charge of purified iron oxide nanoparticles (53 nm nominal diameter) is investigated. By adjusting the pH, different nanoparticle surface charge electrostatic regions are found, corresponding to positively, neutral, and negatively charged nanoparticle solutions. For each situation, the adsorption of negatively charged FAs at variable concentrations is considered by analyzing surface charge modifications and calculating experimental kinetics aggregation rates. Results show that, under the conditions used, and range of FAs environmental relevant conditions, the nanoparticle aggregation process is promoted only when the nanoparticle positive surface charge (solution pH less than the charge neutralization point) is compensated by the adsorption of FAs. In all the other cases, FAs adsorption and increase of FAs concentration are expected to promote not only the NPs stabilization but also the disaggregation of NPs aggregates. In addition, our study suggest that very low concentrations of FAs [0.1 mg/l are sufficient to rapidly stabilize iron hydroxide NPs solutions at concentration \5 mg/l.

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Section: Introductionmentioning

confidence: 99%

Fulvic acids concentration and pH influence on the stability of hematite nanoparticles in aquatic systems

Palomino

Stoll

2013

J Nanopart Res

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“…Ability of gold nanoparticles supported on alumina to remove Hg from drinking water and reduction of Cr(VI) through sorption by cerium oxide nanoparticles was reported by Lisha and Pradeep ( 2009 ) and Recillas et al ( 2010 ). Shipley et al ( 2011 ) used nZVI impregnated with clays to adsorb and degrade heavy metals like Zn and Cu from wastewater. By adopting this practice of advanced adsorption, limitations of conventional adsorption technology (low effi ciency and high operational cost) could be overcome as the use of nanoparticles is cost-effective in the remediation of various pollutants in aqueous solution including heavy metals, PCBs and nitrocompounds .…”

Section: Nanoremediationmentioning

confidence: 99%

In-Situ Remediation Approaches for the Management of Contaminated Sites: A Comprehensive Overview

Kuppusamy

Thavamani

Megharaj

et al. 2016

Reviews of Environmental Contamination and Toxicology

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Though several in-situ treatment methods exist to remediate polluted sites, selecting an appropriate site-specific remediation technology is challenging and is critical for successful clean up of polluted sites. Hence, a comprehensive overview of all the available remediation technologies to date is necessary to choose the right technology for an anticipated pollutant. This review has critically evaluated the (i) technological profile of existing in-situ remediation approaches for priority and emerging pollutants, (ii) recent innovative technologies for on-site pollutant remediation, and (iii) current challenges as well as future prospects for developing innovative approaches to enhance the efficacy of remediation at contaminated sites.

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“…According to the London-van der Waals theory, the binding formation present in the environmental compounds is the presence of the electrostatic interaction between different charges and the formation of complex compounds between iron nano-oxides and organic ligands (Illes and Tombacz 2006). Iron nano-oxides (magnetite) are used as sorbents of toxic compounds, such as arsenic (Shipley et al 2011), selenium (Gonzalez et al 2012), palladium, rhodium, platinum (Uheida et al 2006), and uranium . Fe x O y -NPs exhibit the greatest ability to bind ions at low pH levels (2-4).…”

Section: Iron Oxide Nanoparticlesmentioning

confidence: 99%

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

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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

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Study of iron oxide nanoparticles in soil for remediation of arsenic

Cited by 125 publications

References 31 publications

Fulvic acids concentration and pH influence on the stability of hematite nanoparticles in aquatic systems

Fulvic acids concentration and pH influence on the stability of hematite nanoparticles in aquatic systems

In-Situ Remediation Approaches for the Management of Contaminated Sites: A Comprehensive Overview

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

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