Removal of Au³⁺ and Ag⁺ from aqueous media with magnetic nanoparticles functionalized with squaramide derivatives

Abstract

An efficient methodology, based on squaramide-coated magnetite nanoparticles, for the removal of Au3+ and Ag+ by magneto filtration from water.

Gold Recovery from E-Waste by Porous Porphyrin–Phenazine Network Polymers

“…Many adsorbents have been attempted for the purpose of capturing gold species from a complex solution. The literature includes biomaterials such as lignin-based − and chemically modified polysaccharide adsorbents, − chelating resins, − functionalized silica, , nanoparticles, , metal–organic frameworks (MOFs), , and porous organic polymers . In general, a common strategy for designing an adsorbent is to incorporate electron-rich atoms such as oxygen, nitrogen, and sulfur to take advantage of their ability to coordinate or chelate metal ions.…”

High-fidelity detection of picric acid following proton prompted fluorescence quenching by a novel acridine yellow G-based binuclear ZnII-metallacycle

“…Owing to such useful properties with ease of handling, non-toxicity, and diamagnetic nature, Zn II was chosen to develop 1 (probe) for PA detection. 45 To further showcase the novelty of synthesizing Zn II -complex, UV-vis and fluorescence spectra for H 2 L and H 2 L M in the presence of the given metal ions were also obtained, which displayed that fluorescence increased significantly only in the presence of Zn II -ions (Fig. S11, ESI†).…”

Introducing Selectivity on Carbonaceous Material: Removing Noble Salts, Au3+, and Ag+ from Aqueous Media by Nanodiamonds Functionalized with Squaramides

“…The magnetic iron oxide nanoparticles coated with squaramide−dopamine-derived nanoparticles have demonstrated a high capacity for the complexation of heavy metals and transition metals, such as Cr 3+ , Pb 2+ , Hg 2+ , Zn 2+ , Cd 2+ , Co 2+ , or Cu 2+ [16], as well as salts derived from Ag + and Au 3+ [17] in aqueous media. Due to their low diffusion and low toxicity, it is considered that the environmental and health impacts of salts derived from Ag + and Au 3+ in water are minimal.…”