Complete and simultaneous removal of ionic silver and silver nanoparticles by using an ionic liquid supported on a magnetic nanoparticle core

Muñoz-Sandoval, María J.; Caravaca, Manuel; López-Garcı́a, Ignacio; Hernández‐Córdoba, Manuel; Vicente-Martínez, Yésica

doi:10.1016/j.envres.2022.113943

Cited by 5 publications

(4 citation statements)

References 32 publications

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“…At these levels of silver concentration, it is not possible to directly measure aqueous samples because of the sensitivity of the detection technique. In these cases, we have resorted to measuring the concentration of silver retained from its desorption in an acid medium containing thiourea [5]. This desorption is carried out in a small volume (100 µL), which makes it possible to reach an enrichment factor close to 100.…”

Section: Study Of Competition With Other Ions Present In Water Applic...mentioning

confidence: 99%

“…Currently, many products contain ionic and nanomeric silver in their formulation due to the well-known disinfectant and antifungal properties of silver [5]. Nanomeric silvers (AgNPs) have strong inhibitory and bactericidal properties, which have led to the use of not only AgNPs but also Ag(I) salts in catheters, cuts, burns, and wounds to protect against infection [6].…”

Section: Introductionmentioning

confidence: 99%

“…As a result, the presence of these materials in aquatic environments is increasing [14][15][16][17][18]. It is therefore essential to develop and improve methods for eliminating these substances, which are increasingly present in water and can cause irreversible problems in ecosystems [5,19].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, our group introduced the first hybrid method able to remove 100% of both silvers simultaneously, using a mixture of magnetic nanoparticles and ionic liquid (Fe 3 O 4 @IL) as a removal agent [5]. This work introduces some relevant novelties with respect to silver-removal studies.…”

Section: Introductionmentioning

confidence: 99%

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

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et al. 2023

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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: Study Of Competition With Other Ions Present In Water Applic...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%