We summarize the procedures applied for total metal content, extraction/separation and/or preconcentration of NPs from the matrix, separation of metallic NPs from their ions or from larger particles and NPs' size fractionation.
Bimetallic silicate-derived samples show features similar to those of the pristine MCM-41, regardless of the total metal content.
Surprisingly, the speciation for a given pond appears to be very homogenous, with the homogeneity being independent of total metal content, particle size or location within the pond.
Furthermore, the effects of metal weight ratio, total metal content, different hole scavengers and pH value of the solution are also investigated.
Scanning electron microscopy was used to study the deposit of nickel and vanadium, and the total metal content was determined by atomic absorption.
PtAu catalysts with a total metal content of 0.4 wt% were prepared, with different Pt Au molar ratios: 1 1; 2:1 and 1 2.
EDDS-promoted mineral dissolution, on the other hand, was more significant in multi-metal contaminated soils as a result of the higher EDDS concentration applied to the soils of higher total metal content.
The highest hydrogen yield and purity were achieved in the case of Pt-Ru/DND catalysts at total metal content of 0.3% and atomic Pt/Ru ratio of 9/1.
The PANI/metal composites are characterized using FTIR spectroscopy, thermal gravimetric analysis, and conductivity measurements to evaluate the interactions between the metal and polymer, the total metal content, and the electronic properties of the composites.
Geochemical analysis of this site revealed that even though total metal content in mine tailings was relatively low (e.g. Cu = 1000 mg kg−1), metals including Mn, Ba, Zn, and Cu were all found at significantly higher levels in efflorescence salts formed by evaporation on the tailings impoundment surface following the rainy season (e.g. Cu = 68,000 mg kg−1).
