Corrosion Inhibition of Carbon Steel by Anthraquinones Derivatives in 1.0 M HCl: Electrochemical and Quantum Calculations

Saqalli, L.

doi:10.20964/2018.05.40

Cited by 9 publications

(2 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to confirm the contribution of sorption process in Re(VII) removal by Ni/Fe 0 , an additional experiment was conducted with the presence of Fe(II)-chelating agent (Anthrarufin or 1,5dihydroxyanthraquinone), such organic compounds have been previously reported as an effective corrosion inhibitor for metallic materials (Saqalli et al, 2018;Yang et al, 2018). As displayed in Figure 8A, Re(VII) removal by either Fe 0 or Ni/Fe 0 was significantly decreased in the presence of 1,5-dihydroxyanthraquinone.…”

Section: Re(vii) Removal Pathwaysmentioning

confidence: 99%

Improved immobilization of Re(VII) from aqueous solutions via bimetallic Ni/Fe0 nanoparticles: Implications towards Tc(VII) removal

Maamoun,

Tokunaga,

Dohi

et al. 2023

Front. Nucl. Eng.

View full text Add to dashboard Cite

Introduction: In this work, bimetallic nickel/iron nanoparticles (Ni/Fe0) were prepared to enhance rhenium (Re(VII)) immobilization from aqueous solutions, as the surrogate of technetium (Tc(VII)).Methods: Two synthesis approaches of Ni/Fe0, pre-, and post-nucleation, were investigated towards Re(VII) removal. Different characterization techniques were considered to elucidate the physicochemical features of the fresh and reacted materials, such as scanning transmission electron microscopy-energy dispersive X-ray spectroscopy (STEM-EDX), X-ray diffraction (XRD), and X-ray absorption near edge spectroscopy (XANES). The influence of several reaction parameters on Re(VII) removal was investigated, including Ni/Fe0 ratio, dosage, initial pH, temperature, and initial concentration.Results and discussion: Results showed a promising potential of Ni/Fe0, either pre- or post-nucleation synthesized, in Re(VII) removal, especially at the early stage of the reaction, where Ni/Fe0: 0.4 yielded almost full removal efficiency of initial 15.0 μM-Re(VII) within the first 10 min of reaction. Even at low Ni/Fe0 dosages, such as 0.25 and 0.5 g/L, reasonable removal efficiency was achieved after 2 h reaction time of ∼73% and ∼98%, respectively. Unlike acidic/neutral pH, alkaline conditions were not favorable for Re(VII) removal by Ni/Fe0 owing to the delayed aqueous corrosion of Fe0-core resulting in insufficiency of electrons available for Re(VII) reduction. The reductive abilities were confirmed by XANES, revealing Re(VII) reduction to Re(IV)/(III) by the released electrons from Fe0-core in both Fe0 and Ni/Fe0 materials. Pseudo-first- and second-order kinetic models were suitable to describe Re(VII) removal by Ni/Fe0, implying physical and/or chemical processes were involved. Zeta potential measurements depicted the point of zero charge (pHPZC) of Fe0 and Ni/Fe0 to be 8.24 and 7.63, respectively, suggesting the involvement of electrostatic sorption of ReO4− on the positively charged surface of Ni/Fe0. The occurrence of multi- and mono-layer sorption within Re(VII) removal process was implicated, following Freundlich and Sips isotherm models. The presence of Ni0/NiO on Fe0-surface resulted in providing an efficient electron-transfer medium that facilitated Re(VII) reduction, leading to impressive kinetic rates. Overall, our study provided valuable insights into the use of Ni/Fe0 for Re(VII) removal from water and offered guidance for future research in such an aspect towards the pilot-scale applications of Tc(VII) removal from nuclear wastewater.

show abstract

Section: Re(vii) Removal Pathwaysmentioning

confidence: 99%

Improved immobilization of Re(VII) from aqueous solutions via bimetallic Ni/Fe0 nanoparticles: Implications towards Tc(VII) removal

Maamoun,

Tokunaga,

Dohi

et al. 2023

Front. Nucl. Eng.

View full text Add to dashboard Cite

show abstract

“…Many research teams focused on corrosion inhibition as a primary procedure to counter this optic problem. Inhibitors can be divided into three categories that are surfactant inhibitors, organic inhibitors, and inorganic inhibitors 6 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Theoretical and Electrochemical Studies of Pyrazoline Derivatives

Soumane¹,

Baouid²,

Hadrami³

et al. 2020

Mediterr.J.Chem.,

View full text Add to dashboard Cite

The reaction of 1,3-dipolar cycloaddition of trans-anethole and three different diarylnitrilimines bearing different substituents X= {H, CH3, Cl} yield to the creation of three 1,3,4,5-tetrasubstituted pyrazoles. These reactions produce a single regioisomer. These compounds' structures were studied using diverse spectroscopic techniques such as 1H, 13C NMR, and HRMS. Afterwards, X-ray diffraction is performed at 5-(4-methoxyphenyl)-4-methyl-1,3-diphenyl-4,5-dihydro-1H-pyrazole. Also, Density Functional Theory (DFT) is performed to characterize these cycloadducts.Moreover, these synthesized compounds' molecular geometry and electronic structures have been studied using high-level ab initio calculations and DFT using the B3LYP functional. All geometries have been optimized at the B3LYP/6-311+G(d,p) basis set with different kinds of solvents. In the end, the protection against corrosion of copper surface is tested using these pyrazolines. As a result, the experimental analysis proved that the obtained cycloadducts belong to the pyrazoline family. Also, X-ray diffraction determined the stereochemistry of these compounds. DFT-based calculations revealed the existence of three stable conformations of each compound. The theoretical study and the experimental spectroscopic data showed perfect matching. The electrochemical investigation indicates that these pyrazoline compounds exhibit a good inhibition performance, preventing the degradation of copper in NaCl (3%) solution with a high inhibition efficiency of 80%.

show abstract

Colloidal and interface aqueous chemistry of dyes: Past, present and future scenarios in corrosion mitigation

Ganjoo

Verma

Kumar

et al. 2023

Advances in Colloid and Interface Science

View full text Add to dashboard Cite

Corrosion Inhibition of Carbon Steel by Anthraquinones Derivatives in 1.0 M HCl: Electrochemical and Quantum Calculations

Cited by 9 publications

References 69 publications

Improved immobilization of Re(VII) from aqueous solutions via bimetallic Ni/Fe0 nanoparticles: Implications towards Tc(VII) removal

Improved immobilization of Re(VII) from aqueous solutions via bimetallic Ni/Fe0 nanoparticles: Implications towards Tc(VII) removal

Synthesis, Characterization, Theoretical and Electrochemical Studies of Pyrazoline Derivatives

Colloidal and interface aqueous chemistry of dyes: Past, present and future scenarios in corrosion mitigation

Contact Info

Product

Resources

About