Adsorption of Monoalkyl Phosphates at the Zircon–Aqueous Solution Interface

Bjelopavlic, Mick; Ralston, John; Reynolds, Geoffrey W.

doi:10.1006/jcis.1998.5778

Cited by 21 publications

(12 citation statements)

References 9 publications

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“…After around 12 h, some adsorbed polymeric molecules were desorbed from the steel surface, resulting in a reduction in the covered areas with polymeric molecules and, thus, decreasing the % IEs. After 16 h, the constancy of the % IE values with time may be ascribed to the compactness of the adsorbed layers on the steel surface [ 51 ].…”

Section: Resultsmentioning

confidence: 99%

Experimental and Computational Exploration of Chitin, Pectin, and Amylopectin Polymers as Efficient Eco-Friendly Corrosion Inhibitors for Mild Steel in an Acidic Environment: Kinetic, Thermodynamic, and Mechanistic Aspects

et al. 2023

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Herein, the inhibition impacts of chitin, pectin, and amylopectin as carbohydrate polymers on the corrosion of mild steel in 0.5 M HCl were researched utilizing various experimental and theoretical tools. The acquired outcomes showed that the inhibition efficiencies (% IEs) of the tested carbohydrate polymers were increased by raising their concentrations and these biopolymers acting as mixed-kind inhibitors with major anodic ones. The acquired % IEs values were reduced with rising temperature. The higher % IEs of the tested polymers were inferred via powerful adsorption of the polymeric molecules on the steel surface and such adsorption obeyed the Langmuir isotherm. The computed thermodynamic and kinetic quantities confirmed the mechanism of physical adsorption. The kinetics and mechanisms of corrosion and its protection by polymeric compounds were illuminated. The results obtained from all the techniques used confirmed that there was good agreement with each other, and that the % of IEs followed the sequence: chitin > amylopectin > pectin.

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Section: Resultsmentioning

confidence: 99%

Experimental and Computational Exploration of Chitin, Pectin, and Amylopectin Polymers as Efficient Eco-Friendly Corrosion Inhibitors for Mild Steel in an Acidic Environment: Kinetic, Thermodynamic, and Mechanistic Aspects

et al. 2023

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“…For Zr-and REE-bearing minerals, chelating collectors like hydroxamic acid or phosphoric acid ester have been recommended. The selectivity of collectors on the basis of phosphoric acid esters has been proven: molecules of mono alkyl phosphate (C8) and Zr on the surface of zircon form a bidentate chelate complex through two hydroxyl groups [17]. Flotation is successful for zircon, baddeleyite, eudialyte, catapleiite, and wöhlerite using isooctyl phosphate [10], for zircon using Flotinor SM 15 [18] and for eudialyte and baddeleyite using SINTAF [8] at acidic pH levels.…”

Section: Literature Reviewmentioning

confidence: 99%

Mineral Processing of Eudialyte Ore from Norra Kärr

Stark

Silin

Wotruba

2016

J. Sustain. Metall.

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Eudialytes are a nonconventional source for rare earth elements (REE). As the total REE content of eudialytes is relatively low, high-grade mineral concentrates have to be produced. The applicability of magnetic separation and direct selective flotation for the processing of eudialyte ore from Norra Kärr (Sweden) was tested. The eudialyte in the used sample contains around 4 % of REE. Magnetic separation is applicable for eudialyte ore processing. The higher the strength of the magnetic field, the higher the recovery. Recovery of around 81 % of REE was achieved in a two-stage process of rougher and scavenger at a mass reduction of 48 %. The concentrate grade of around 0.76 % REE is not sufficient for further hydrometallurgical processing steps. A newly developed reagent regime for the direct selective flotation of eudialyte from eudialyte ore was tested with different samples. The regime consists of oxalic acid and sodium hexametaphosphate as depressants and a mixture of mono/di phosphoric acid esters as collector, at a pH below 4. This new method proved applicable for raw ore as well as magnetic preconcentrate. Concentrates with grades of around 2 % R Y, Ce, La were produced.

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“…Some literatures (16,(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31) reported that the negative charge on a metal surface could be increased by inorganic anions. This negative charge helped cationic surfactant molecules to be easily adsorbed on the surface.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Inhibition Effect of Cationic Surfactant and Synergistic Effect of the Presence of the Chloride Ions

Asefi

Arami²,

Sarabi³

2009

ECS Trans.

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Corrosion inhibition effect of cationic surfactant DTAB (dodecyl threemethyl ammonium bromide) on low carbon steel in 1M HCl was studied using weight loss method. Inhibition efficiency increased with the increase of surfactant concentration. Also, synergistic effect between surfactant and chloride ions in 1M HCl was investigated with the presence of different concentration of NaCl. The inhibition efficiency increased with the increase of NaCl concentration and reached the maximum value near 0.1 M. This composite inhibitor system containing cationic surfactant and chloride ions was efficient and low-cast for steel corrosion inhibition in HCl medium, even when the concentration of DTAB was as low as 0.5x10 -4 M.

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Adsorption of Monoalkyl Phosphates at the Zircon–Aqueous Solution Interface

Cited by 21 publications

References 9 publications

Experimental and Computational Exploration of Chitin, Pectin, and Amylopectin Polymers as Efficient Eco-Friendly Corrosion Inhibitors for Mild Steel in an Acidic Environment: Kinetic, Thermodynamic, and Mechanistic Aspects

Experimental and Computational Exploration of Chitin, Pectin, and Amylopectin Polymers as Efficient Eco-Friendly Corrosion Inhibitors for Mild Steel in an Acidic Environment: Kinetic, Thermodynamic, and Mechanistic Aspects

Mineral Processing of Eudialyte Ore from Norra Kärr

Corrosion Inhibition Effect of Cationic Surfactant and Synergistic Effect of the Presence of the Chloride Ions

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