Ternary [Al2O3–electrolyte–Cu2+] species: EPR spectroscopy and surface complexation modeling

Mechanism of heavy metal uptake by a hybrid MCM-41 material: Surface complexation and EPR spectroscopic study

“…Recently, we have demonstrated that by applying EPR spectroscopy in interfacial phenomena, key-information, e.g., on the type and number of coordinating atoms, can be reliably obtained after proper analysis of the spin-Hamiltonian parameters, i.e., such as g tensor and hyperfine coupling tensor, A, components [44,45]. In the present work, EPR spectroscopy was employed in parallel with analytical metal binding studies.…”

“…1A show that the Pb uptake increased at alkaline pH values, for both the hybrid MCM-41 AEDTC and the MCM-41 material. This pH trend is a well-documented phenomenon for the adsorption of metal cations in metal oxides bearing deprotonable surface groups [23,44,46,47] which serve as metal binding sites.…”

“…Electron paramagnetic resonance (EPR) spectroscopy can provide valuable information concerning the local environment of paramagnetic metals, i.e., such as Cu 2+ [43,44]. Recently, we have demonstrated that by applying EPR spectroscopy in interfacial phenomena, key-information, e.g., on the type and number of coordinating atoms, can be reliably obtained after proper analysis of the spin-Hamiltonian parameters, i.e., such as g tensor and hyperfine coupling tensor, A, components [44,45].…”

Hybrid [polysulfone–Zero Valent Iron] membranes: Synthesis, characterization and application for AsIII remediation

“…By analysis of the g // and A // components of the Cu II (I = 3/2, S = 1/2) using the ''Peisach-Blu mberg'' correlation plot [45] we may conclude on the number and type of coordinating atoms on the Cu II center. This methodology was originally developed for Cu complexes in solution or in proteins [33], however we have demonstrated that is can provide valuable information for Cu II ions coordinated on surfaces [29,46,47]. An EPR spectrum for Cu II ions interacting with a polysulfone membrane is shown in Fig.…”

“…Table 3. (B) The relation between g || and A || (a), crosses are reference data from [45,47]. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)…”