Impacts of Surface Modification on Isotherm and Kinetics of Collector Adsorption

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Salmani Nuri Omid; Irannajd Mehdi; Mehdilo Akbar

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Journal: IRANIAN JOURNAL OF MINING ENGINEERING (IRJME) Year:2018 | Volume:13 | Issue:39 Page(s): 68-81

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Title

Impacts of Surface Modification on Isotherm and Kinetics of Collector Adsorption

Author(s)

Salmani Nuri Omid | Irannajd Mehdi | Mehdilo Akbar | Issue Writer Certificate

Keywords

Surface dissolutionQ1

Adsorption isothermQ1

Adsorption kineticsQ1

IlmeniteQ1

Sodium oleateQ1

Abstract

Surface dissolution is one of the surface modification methods which has been used prior to the flotation process to improve minerals flotability. In this study, the effect of Surface dissolution has been investigated on isotherm and Adsorption kinetics of Sodium oleate as a collector on the surface of Ilmenite, olivine-pyroxene and quartz. Conditioning time, pH, temperature, activation energy, specific area and contact angle were the parameters which were studied before and after Surface dissolution. The results of Adsorption isotherms of Langmuir, Freundlich and Temkin, and kinetic models of elovich, lagergerin and pseudo second-order showed that the collector adsorption on the minerals surfaces can be well described by Langmuir isotherm and pseudo second-order kinetic model. The collector adsorption on the minerals surfaces is occurred mainly based on adsorption capacity from solution and single layer. Results indicated that the Surface dissolution increases of the collector adsorption on Ilmenite surface while decreasing it in gangue minerals. Also, the activation energy of Ilmenite is reduced form 57255. 4 J/mol to 42437. 9 J/mol after Surface dissolution which indicates a more favorable collector adsorption on Ilmenite. Furthermore, after Surface dissolution the activation energies of quartz and olivine-pyroxene are increased from 5746. 5 J/mol to 5816. 5 J/mol, and from 8326. 6 J/mol to 12523. 3 J/mol, respectively. Results of contact angle measurements showed that the contact angle of Ilmenite is increased and while it is decreased in gangue minerals after Surface dissolution. These results were in good agreement with the results of UV-Vis spectroscopy, collector adsorption and ICP analysis.

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APA: Copy

Salmani Nuri, Omid, Irannajd, Mehdi, & Mehdilo, Akbar. (2018). Impacts of Surface Modification on Isotherm and Kinetics of Collector Adsorption. IRANIAN JOURNAL OF MINING ENGINEERING (IRJME), 13(39 ), 68-81. SID. https://sid.ir/paper/117083/en

Vancouver: Copy

Salmani Nuri Omid, Irannajd Mehdi, Mehdilo Akbar. Impacts of Surface Modification on Isotherm and Kinetics of Collector Adsorption. IRANIAN JOURNAL OF MINING ENGINEERING (IRJME)[Internet]. 2018;13(39 ):68-81. Available from: https://sid.ir/paper/117083/en

IEEE: Copy

Omid Salmani Nuri, Mehdi Irannajd, and Akbar Mehdilo, “Impacts of Surface Modification on Isotherm and Kinetics of Collector Adsorption,” IRANIAN JOURNAL OF MINING ENGINEERING (IRJME), vol. 13, no. 39 , pp. 68–81, 2018, [Online]. Available: https://sid.ir/paper/117083/en

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