Separation and Determination of Silver Nanoparticles

Yu, Sujuan; Zhou, Xiaoxia; Liu, Jingfu

doi:10.1007/978-3-662-46070-2_2

Cited by 2 publications

(4 citation statements)

References 80 publications

(121 reference statements)

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“…To assess the behaviour, impact and potential risk of AgNPs it is necessary to detect and quantify AgNPs in the different soil matrices (Yu et al, 2015b). As many other analytical techniques, the detection procedure for AgNPs consists of two main steps: first, the separation of the AgNP particles from soil samples and secondly, the characterization and quantification of the AgNPs (Mattarozzi et al, 2017;Peters et al, 2015).…”

Section: Detection and Quantification Of Agnps In Soilmentioning

confidence: 99%

“…However, information concerning nanomaterial concentration in soils is rare due to the lack of techniques that are able to detect nanomaterials in soils effectively (Gottschalk and Nowack, 2011;Peijnenburg et al, 2016). Depending on the matrix, the separation methods that are available for AgNPs are centrifugation, membrane filtration, dialysis, centrifugal ultrafiltration, hydrodynamic chromatography (HDC), and field flow fractionation (FFF) (Peters et al, 2015;Yu et al, 2015b). However, only a few separation techniques, with low recovery rates, are available for soil samples which has resulted in a limited number of studies that study the toxicity of exposure to AgNPs in natural soils (Schwertfeger et al, 2017).…”

Section: Detection and Quantification Of Agnps In Soilmentioning

confidence: 99%

“…Information concerning nanomaterial concentration in the soil is rare due to the lack of techniques that are able to detect nanomaterials effectively (Gottschalk and Nowack 2011). During sample processing, AgNPs need to be separated from the matrix, quantified and characterized using appropriate detection techniques (Yu et al 2015b). Sample processing often consists of an extraction method followed by some physical separation technique such as filtration, centrifugation or dialysis.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, sample processing may lead to partial or even significant changes of the properties of the AgNPs. In soil, AgNPs may also interact with the soil physicochemical structures leading to difficulties in tracking low AgNPs concentration during transport and in determining the final fate of the AgNPs in the soil (Yu et al 2015b). Finally, the anticipated low environmental AgNPs concentrations in soils and sediment (range 1-10 µg kg -1 ) are another problem because they require highly sensitive techniques for detection Nowack 2008, OCED 2014).…”

Section: Introductionmentioning

confidence: 99%

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Transport of silver nanoparticles in the soil-water nexus

Mahdi¹

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Silver nanoparticles (AgNPs) are used in a growing number of applications and products. Previous studies showed AgNPs can leach from these products to the environment. As a result of AgNPs leaching, sediment, soil and sludge-treated soils may be contaminated with AgNPs. Methods to detect, quantify and characterize AgNPs in soil are urgently needed. This study describes the development and validation of a method for the extraction, quantification and particle size determination of AgNPs in soils. The final method consists of pre-wetting the sample followed by an aqueous extraction, using sonication to re-suspend adsorbed AgNPs, and analysis of the aqueous extract with single particle ICP-MS. Validation of the method showed that the recovery of AgNPs spiked to soil was 44% for sandy soil and 42% for clayey soil. Although this recovery is relatively low, the repeatability and reproducibility values of the particle concentration were within the limits of Horwitz ratio, which makes the method suitable for its purpose. Further, the method concentration detection limit, LODc., is 5 µg kg-1 soil. The developed method can be applied in eco-toxicological and risk-assessments studies for AgNP in the soil environment.

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Section: Detection and Quantification Of Agnps In Soilmentioning

confidence: 99%

Section: Detection and Quantification Of Agnps In Soilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transport of silver nanoparticles in the soil-water nexus

Mahdi¹

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Tracking the Transport of Silver Nanoparticles in Soil: a Saturated Column Experiment

Mahdi

Peters

Ploeg

et al. 2018

Water Air Soil Pollut

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Silver nanoparticles (AgNPs) can enter the environment when released from products containing them. As AgNPs enter soil, they are often retained in the soil profile and/or leached to the groundwater. This research assessed the transport of AgNPs in their “particle form” through the soil profile using a series of columns. Three soil types were put into soil columns: LSH (loam with high organic matter (OM)), LSL (loam with low OM), and Sand (no OM). The results showed that AgNP transport and retention in soil as well as particle size changes are affected by soil organic matter (OM) and the cation exchange capacity (CEC) of soil. OM affected the transport and retention of AgNPs. This was evident in the LSH columns where the OM concentration was the highest and the AgNP content the lowest in the soil layers and in the effluent water. The highest transported AgNP content was detected in the Sand columns where OM was the lowest. CEC had an impact on the particle size of the AgNPs that were retained in the soil layers. This was clear in columns packed with high CEC-containing soils (LSL and LSH) where AgNP particle size decreased more substantially than in the columns packed with sand. However, the decrease in AgNP sizes in the effluent water was less than the decrease in particle size of AgNPs transported through but retained in the soil. This means that the AgNPs that reached the effluent were transported directly from the first layer through the soil macropores. This work highlights the ability to track AgNPs at low concentrations (50 μg kg−1) and monitor the changes in particle size potential as the particles leach through soil all of which increases our knowledge about AgNP transport mechanisms in porous media.

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Separation and Determination of Silver Nanoparticles

Cited by 2 publications

References 80 publications

Transport of silver nanoparticles in the soil-water nexus

Transport of silver nanoparticles in the soil-water nexus

Tracking the Transport of Silver Nanoparticles in Soil: a Saturated Column Experiment

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