Comparison of adsorptive features between silver ion and silver nanoparticles on nanoporous materials

Sim, Jae Hoon; Umh, Ha Nee; Shin, Hyeon Ho; Sung, Hwa Kyung; Oh, Seung Yeon; Lee, Byung Cheun; Selvaraj, Rengaraj; Kim, Younghun

doi:10.1016/j.jiec.2013.11.019

Cited by 15 publications

(1 citation statement)

References 26 publications

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“…However, the adsorption efficiency of these materials is relatively low in some cases [30][31][32]. In addition, modified sludge [33], active carbon [34], organometallic framework materials [35], and porous silica [36] have been used as adsorbents for silver, but these processes are more cumbersome and slower and again do not achieve 100% removal efficiency.…”

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for the instantaneous and simultaneous removal of ionic and nanomeric silver in water samples, using a previously unpublished methodology consisting of the in situ formation of magnetic nanoparticles in the aqueous samples to be treated.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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Preparation of Fluorescent Thiol Group‐Functionalized Silica Microspheres for the Detection and Removal of Silver Ions in Aqueous Solutions

Shen

Liu

et al. 2018

J Chinese Chemical Soc

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We demonstrate that silica microspheres can act as a sensitive fluorescent sensor and adsorbent of Ag+ in aqueous media. These thiol‐functionalized silica microspheres are doped with quantum dots (QDs) using organosilane chemistry in a one‐step preparation. Ligand exchange takes place between the thiolated organosilane and acid‐capped QDs, making the doping easy. Ag+ adsorption by the silica microspheres causes the decrease of fluorescence intensity of the QDs. The detection limit for Ag+ is found to be 10 μmol/L. The abundance of thiol groups on the surface of the microspheres could effectively remove Ag+ through strong interaction. When microspheres with a diameter of 1.1 μm are used as the adsorbents, the adsorption capacity for Ag+ reached 102 mg/g. This excellent adsorption ability is due to the abundance of thiol groups that act as the active sites, facilitating the adsorption of the massive metal ions on the surface of the microspheres. Furthermore, the adsorption isotherm data follows the Freundlich model. The structure and content of the silica microspheres were investigated by scanning and high‐resolution transmission electron microscopy, energy dispersive X‐ray spectroscopy, and Raman analysis, and the fluorescence properties were characterized by fluorescence microscopy.

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Silver nanoparticles adsorption by the synthetic and natural adsorbent materials: an exclusive review

Syafiuddin

Fulazzaky

Salmiati

et al. 2020

Nanotechnol. Environ. Eng.

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Comparison of adsorptive features between silver ion and silver nanoparticles on nanoporous materials

Cited by 15 publications

References 26 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

Preparation of Fluorescent Thiol Group‐Functionalized Silica Microspheres for the Detection and Removal of Silver Ions in Aqueous Solutions

Silver nanoparticles adsorption by the synthetic and natural adsorbent materials: an exclusive review

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