A gossypol derivative as an efficient corrosion inhibitor for St2 steel in 1 M HCl + 1 M KCl: An experimental and theoretical investigation

Berdimurodov, Elyor; Kholikov, Abduvali; Akbarov, Khamdam; Guo, Lei; Abdullah, Aboubakr M.; Elik, Mustafa

doi:10.1016/j.molliq.2021.115475

Cited by 81 publications

(20 citation statements)

References 40 publications

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“…2b. The observed results confirmed that Freundlich isotherms are a lower comfortable empirical isotherm for non−ideal adsorption [29]. The correlation coefficients of Langmuir and Freundlich adsorption isotherms for Mg 2+ and Ca 2+ ions in pure water were found and given in Table 3.…”

Section: Batch Adsorption Isothermssupporting

confidence: 77%

Adsorption Equilibrium, Kinetics, Thermodynamics and Dynamic Separation of Magnesium and CalciumIons from Industrial Wastewater by New Strong Acid Cation Resin of SPVC

Berdimurodov

2021

Pak J Anal Environ Chem

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In the research work, the adsorption equilibrium, kinetics, thermodynamics and dynamic separation of magnesium and calcium ions from industrial wastewater by new strong acid cation resin of SPVC (sulphonated polyvinylchloride) were investigated. The sorption capacity of the studied resin was 3.78 mmol/g and 3.74 mmol/g for magnesium and calcium ions, respectively, according to Langmuir isotherm. It was found that the pseudo−first−order model was better fitted for the adsorption kinetics of magnesium and calcium ions on the resin. The dynamic separation results confirmed that the selected resin effectively separated magnesium and calcium ions from industrial wastewater in the dynamic condition. The change of the standard Gibbs free energy (G) and enthalpy (H), and entropy (S) were calculated. The obtained results confirmed that the adsorption of magnesium and calcium ions on the selected resin is endothermic.

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Section: Batch Adsorption Isothermssupporting

confidence: 77%

Adsorption Equilibrium, Kinetics, Thermodynamics and Dynamic Separation of Magnesium and CalciumIons from Industrial Wastewater by New Strong Acid Cation Resin of SPVC

Berdimurodov

2021

Pak J Anal Environ Chem

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“…Evaluation of the anticorrosion capacity of an inhibitor is also accessible in a nondestructive manner by recording EFM spectra. 42 Fig. S2 † (ESI) shows the EFM spectra in the form of current-frequency for C-steel in 1 M HCl solution at 298 K without and with different concentrations of SPRE.…”

Section: Resultsmentioning

confidence: 99%

Efficient corrosion inhibition by sugarcane purple rind extract for carbon steel in HCl solution: mechanism analyses by experimental and in silico insights

et al. 2021

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“…Conversely, the double layer capacitance (Cdl) gradually decreases as the inhibitor concentration increases. This is owing to the continuous displacements of water molecules adsorbed from the steel surface with the inhibitor molecules and therefore to the increase in the thickness of the double layer 12 . The Cdl is calculated from the equation ( 12)at the maximum frequency (fmax) 52 :…”

Section: Electrochemical Impedance Spectroscopic (Eis) Studiesmentioning

confidence: 99%

“…The effectiveness of these compounds as corrosion inhibitors can be assigned to the number of lone pairs present, the p-orbital character of the free electrons, and the electron density around the nitrogen and oxygen atoms 9-11 . Many of these organic inhibitors have been investigated and found to be appropriate for the prevention of corrosion of carbon steel. However, with increasing environmental awareness, emphasis is being placed on using appropriate inhibitors that are non-toxic or less toxic 12 .…”

Section: Introductionmentioning

confidence: 99%

Corrosion protection of carbon steel by methoxy naphthylbithiophene derivatives in acidic medium: Electrochemical, surface characterization and computational approaches

Fouda

Etaiw

Ismail

et al. 2022

Preprint

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The inhibition efficiency and adsorption affinity were investigated for two novel compounds, namely: 6-methoxy-2-naphthyl-[2, 2’-bithiophene]-5-carboxamidine hydrochloride salt (MA-1440) and 5'-(4-chlorophenyl)-2, 2’-bifuran-5-carboxamidine hydrochloride salt (MA-1456). The inhibition study was conducted on carbon steel surface in 1.0 M HCl with different inhibitor doses and different temperature levels, to investigate the optimum dose and preferable temperature. The performed investigation included chemical, electrochemical, instrumental, and quantum computation techniques. A chemical technique was accomplished by using weight-loss measurements. Different factors were studied using weight-loss measurements in order to reach the maximum inhibition efficiency. The adsorption study revealed that the examined inhibitors obey the Langmuir adsorption isotherm and are chemically adsorbed on the steel surface. The electrochemical measurements were accomplished through the electrochemical impedance (EIS) and potentiodynamic polarization (PDP) techniques. Based on the electrochemical measurements, the examined compounds were categorized as mixed inhibitors. The instrumental examination using different techniques namely: scanning electron microscope (SEM), energy dispersive X-ray (EDX), Fourier-transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) confirmed that the considered inhibitors are excellently adsorbed over the carbon steel surface. The extent of the adsorption affinity of these compounds on the carbon steel surface was studied theoretically using quantum computations and Monte Carlo simulation. The theoretical investigation results of quantum chemistry were validated with those obtained by chemical and electrochemical methodologies. All investigations prove that, the tested compounds were adsorbed chemically on the steel surface and achieved maximum inhibition efficiency of, 94.69% and 90.85% for M-1440 and MA-1456, respectively, at the optimum concentration 3010-6 mol. L-1 and temperature 328 K.

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A gossypol derivative as an efficient corrosion inhibitor for St2 steel in 1 M HCl + 1 M KCl: An experimental and theoretical investigation

Cited by 81 publications

References 40 publications

Adsorption Equilibrium, Kinetics, Thermodynamics and Dynamic Separation of Magnesium and CalciumIons from Industrial Wastewater by New Strong Acid Cation Resin of SPVC

Adsorption Equilibrium, Kinetics, Thermodynamics and Dynamic Separation of Magnesium and CalciumIons from Industrial Wastewater by New Strong Acid Cation Resin of SPVC

Efficient corrosion inhibition by sugarcane purple rind extract for carbon steel in HCl solution: mechanism analyses by experimental and in silico insights

Corrosion protection of carbon steel by methoxy naphthylbithiophene derivatives in acidic medium: Electrochemical, surface characterization and computational approaches

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