Recent developments in the removal of metal-based engineered nanoparticles from the aquatic environments by adsorption

Ma, Lifeng; Li, Qinying; Xu, Yuanxi; Jiang, Ming; Xu, Li

doi:10.1016/j.chemosphere.2021.133089

Cited by 6 publications

(2 citation statements)

References 137 publications

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“…The adsorption de Ag(I) and Ag(0) using different materials has been reviewed in [37][38][39]. Adsorption-based processes have obvious advantages, such as selectivity, since the surface can be modified to achieve better removal rates depending on the species adsorbed [40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Fast Procedure for Removing Silver Species in Waters Using a Simple Magnetic Nanomaterial

Vicente-Martínez,

Ruiz-Mendieta,

Caravaca-Garratón

et al. 2023

Separations

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The increase in the production and use of disinfectants containing silver atoms (in both its ionic and nanomeric forms) in their formulation, due to the global pandemic situation caused by COVID-19, has increased the presence of silver species in wastewater. Moreover, silver atoms are now considered as emerging pollutants in water. In this work, we propose a novel method for the instantaneous and simultaneous removal of ionic and nanomeric silver in water samples, using a previously unpublished methodology consisting of the in situ formation of magnetic nanoparticles in the aqueous samples to be treated. While the nanoparticle precursors react to form them, the silver atoms present in the sample are adsorbed onto them due to a strong electrostatic interaction. As the final nanoparticles are magnetic, they can be easily removed from the aqueous medium using a magnet, leaving the samples free of silver species. The innovative feature of the method is that the adsorbent is synthesized in situ, within the sample to be treated, making the approach a low-cost, easy-to-perform solution. Temperature, contact time, dose of Fe3O4, and concentration of nanomeric and ionic silver were investigated. The results showed that at 50 °C, 100% of both silver species were removed from the water samples simultaneously. The surface of Fe3O4 was characterized before and after the application of the removal process using energy-dispersive X-ray spectroscopy and Field Emission scanning electron microscopy. Adsorption kinetics and equilibrium isotherms studied reveal a Langmuir-type physicochemical process. The procedure has been applied to different water samples (river and drinking water) with excellent results, making the method a new standard for the removal of ionic and nanomeric silver. In addition, the nanoparticles formed could be recycled and reused for other analytical and decontamination purposes.

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Section: Introductionmentioning

confidence: 99%

Fast Procedure for Removing Silver Species in Waters Using a Simple Magnetic Nanomaterial

Vicente-Martínez,

Ruiz-Mendieta,

Caravaca-Garratón

et al. 2023

Separations

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“…The recent increase in use and disposal of AuNP seem to increase the risk of their intentional and unintentional release into the natural environment to such an extent that they are considered emerging pollutants [ 22 , 23 , 24 ]; their elevated concentrations can be expected in all environmental compartments [ 25 ]. Despite the increasing risk of exposure, the information on fate and toxicity of AuNP is still very limited [ 26 , 27 ], partly due to the lack of methods suitable for reliable AuNP quantification in complex matrices [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Preconcentration and Separation of Gold Nanoparticles from Environmental Waters Using Extraction Techniques Followed by Spectrometric Quantification

Hagarová

Nemček

Šebesta

et al. 2022

IJMS

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The quantification of gold nanoparticles (AuNP) in environmental samples at ultratrace concentrations can be accurately performed by sophisticated and pricey analytical methods. This paper aims to challenge the analytical potential and advantages of cheaper and equally reliable alternatives that couple the well-established extraction procedures with common spectrometric methods. We discuss several combinations of techniques that are suitable for separation/preconcentration and quantification of AuNP in complex and challenging aqueous matrices, such as tap, river, lake, brook, mineral, and sea waters, as well as wastewaters. Cloud point extraction (CPE) has been successfully combined with electrothermal atomic absorption spectrometry (ETAAS), inductively coupled plasma mass spectrometry (ICP-MS), chemiluminescence (CL), and total reflection X-ray fluorescence spectrometry (TXRF). The major advantage of this approach is the ability to quantify AuNP of different sizes and coatings in a sample with a volume in the order of milliliters. Small volumes of sample (5 mL), dispersive solvent (50 µL), and extraction agent (70 µL) were reported also for surfactant-assisted dispersive liquid–liquid microextraction (SA-DLLME) coupled with electrothermal vaporization inductively coupled plasma mass spectrometry (ETV-ICP-MS). The limits of detection (LOD) achieved using different combinations of methods as well as enrichment factors (EF) varied greatly, being 0.004–200 ng L−1 and 8–250, respectively.

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Flocculants based on responsive polymers and chitosan for removal of metallic nanoparticles as contaminants of emerging concern present in water

De-Paz-Arroyo

Picos-Corrales

Pérez‐Sicairos

et al. 2023

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Recent developments in the removal of metal-based engineered nanoparticles from the aquatic environments by adsorption

Cited by 6 publications

References 137 publications

Fast Procedure for Removing Silver Species in Waters Using a Simple Magnetic Nanomaterial

Fast Procedure for Removing Silver Species in Waters Using a Simple Magnetic Nanomaterial

Preconcentration and Separation of Gold Nanoparticles from Environmental Waters Using Extraction Techniques Followed by Spectrometric Quantification

Flocculants based on responsive polymers and chitosan for removal of metallic nanoparticles as contaminants of emerging concern present in water

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