Determination of Silver Nanoparticles in Liquid Environmental Samples

Gajec, Monika; Kukulska–Zając, Ewa; Król, A.

doi:10.15666/aeer/1804_57755788

Cited by 4 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, one of the analytical methodologies that has been gaining in popularity over the years is single particle inductively coupled plasma mass spectrometry (SP-ICPMS), which allows the identification, characterization, and determination of the mass and particle number concentration of AgNPs at low concentrations (ng·L −1 level) [ 21 ]. In fact, SP-ICPMS has been employed to obtain quantitative and qualitative information on AgNPs present in spiked or non-spiked lake waters [ 26 , 27 , 28 , 29 ], river waters [ 28 , 30 , 31 ], tap waters [ 30 , 32 ], seawaters [ 33 , 34 , 35 , 36 ], and wastewaters [ 36 , 37 , 38 ]. Despite the advantages of these sophisticated methods, they also present some drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles and Ionic Silver Separation Using a Cation-Exchange Resin. Variables Affecting Their Separation and Improvements of AgNP Characterization by SP-ICPMS

Iglesías

Torrent

2021

Nanomaterials

View full text Add to dashboard Cite

Silver nanoparticles (AgNPs) are frequently found in everyday products and, as a consequence, their release into the environment cannot be avoided. Once in aquatic systems, AgNPs interact with natural constituents and undergo different transformation processes. Therefore, it is important to characterize and quantify AgNPs in environmental waters in order to understand their behavior, their transformation, and their associated toxicological risks. However, the coexistence of ionic silver (Ag+) with AgNPs in aquatic systems is one of the greatest challenges for the determination of nanosilver. Ion-exchange resins can be used to separate Ag+ from AgNPs, taking advantage of the different charges of the species. In this work, Dowex 50W-X8 was used to separate Ag+ and AgNPs in order to easily determine AgNP concentrations using inductively coupled plasma optical emission spectroscopy. The separation methodology was successfully applied to river water samples with different ratios of Ag+ and AgNPs. However, the methodology is not useful for wastewater samples. The described methodology also demonstrated an improvement in the determination of the particle size of AgNPs present in river waters by single particle inductively coupled plasma mass spectrometry when a significant amount of Ag+is also present.

show abstract

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles and Ionic Silver Separation Using a Cation-Exchange Resin. Variables Affecting Their Separation and Improvements of AgNP Characterization by SP-ICPMS

Iglesías

Torrent

2021

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…For the separation of nanoparticles, among others, ultrafiltration, cloud point extraction (CPE) centrifugation, solid phase extraction (SPE), and flow fractionation in an asymmetric force field (AF4) are used [31].…”

Section: Introductionmentioning

confidence: 99%

“…The second separation method, CPE, was chosen because it is easy to use, nontoxic, and resistant to silver ions in the matrix. This technique has been successfully used by other researchers to separate NPs from environmental samples (e.g., wastewater, surface water, or sewage sludge) [31].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Silver Nanoparticle Separation Method from Drilling Waste Matrices

2021

View full text Add to dashboard Cite

Significant amounts of produced water, spent drilling fluid, and drill cuttings, which differ in composition and characteristics in each drilling operation, are generated in the oil and gas industry. Moreover, the oil and gas industry faces many technological development challenges to guarantee a safe and clean environment and to meet strict environmental standards in the field of processing and disposal of drilling waste. Due to increasing application of nanomaterials in the oil and gas industry, drilling wastes may also contain nanometer-scale materials. It is therefore necessary to characterize drilling waste in terms of nanomaterial content and to optimize effective methods for their determination, including a key separation step. The purpose of this study is to select the appropriate method of separation and pre-concentration of silver nanoparticles (AgNPs) from drilling wastewater samples and to determine their size distribution along with the state of aggregation using single-particle inductively coupled plasma mass spectrometry (spICP-MS). Two AgNP separation methods were compared: centrifugation and cloud point extraction. The first known use of spICP-MS for drilling waste matrices following mentioned separation methods is presented.

show abstract