Surface structure of finely dispersed iron stabilized by spontaneous adsorption as derived from XPS and ESR evidence

Mikhailik, O.M.; Pankratov, Yu. V.; Bakai, E. A.; Senkevich, A. I.; Shpak, A. P.

doi:10.1016/0368-2048(95)02502-2

Cited by 4 publications

(2 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peak at 282.5 eV corresponds to the C–N bond present in the aliphatic chain of the herbicide. The other peak corresponds to the signal of the delocalized electrons of the aromatic ring of the Atz molecule …”

Section: Resultsmentioning

confidence: 99%

“…The other peak corresponds to the signal of the delocalized electrons of the aromatic ring of the Atz molecule. 52 The Fe 2p spectrum (Figure 3b) displays a maximum energy value at approximately 711 eV for the Fe 2p 3/2 core level, together with a broad satellite peak near 719 eV. The peak at 711 eV suggests the presence of Fe 3+ -O species, while peaks obtained from 712.8 to 715.4 eV correspond to a Fe 3+multiplet.…”

Section: Adsorption Mechanism Of Atz Onto Femmentioning

confidence: 97%

See 1 more Smart Citation

Humic Acid–Fe(Hydr)oxide Composites Supported on Montmorillonite: Synthesis, Characterization, and Atrazine Adsorption

et al. 2017

View full text Add to dashboard Cite

Much progress has been made involving the interaction of atrazine (Atz) with natural geosorbents like Fe(hydr)oxides, organic matter, and clay minerals. However, the properties of the humic acid–Fe(hydr)oxides-clay composites differ from their individual member phases, exerting an influence on the adsorption capacity and stability of the system. In this work, the evaluation of Atz adsorption onto humic acid–Fe(hydr)oxide supported on montmorillonite (HA–FeM) was performed. A combination of the X-ray diffraction pattern and batch adsorption experiments at different pH and ionic strength conditions were performed. The identification of the surface groups involved in the interaction FeM–Atz was carry out using X-ray photoelectron spectroscopy. The presence of Fe(hydr)oxides and humic acid improve the adsorption capacity of montmorillonite. Acidic pH and high ionic strength conditions further increases the adsorption. The heterogeneity of the surface sites and cooperative effect contributes to the adsorption process. However, the hydrophobic character of the herbicide is the key factor controlling adsorption. The results obtained from this work give insights about the adsorption mechanism of Atz onto humic acid Fe(hydr)oxides-clay composites and provide information about the potentiality of this type of material to be used to remove organic pollutants present in the aquatic environment.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Adsorption Mechanism Of Atz Onto Femmentioning

confidence: 97%