An Experimental Investigation of Pristine Barite Adsorption on Sodium Oleate and Sodium Palmitate
American Journal of Physical Chemistry
Volume 7, Issue 4, December 2018, Pages: 63-72
Received: Dec. 15, 2018;
Accepted: Jan. 9, 2019;
Published: Jan. 28, 2019
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Nwoko Christopher Ikpe Amadi, Department of Chemistry, School of Physical Sciences, Federal University of Technology, Owerri, Nigeria
Nkwoada Amarachi Udoka, Department of Chemistry, School of Physical Sciences, Federal University of Technology, Owerri, Nigeria
Okoji Josephine, Department of Chemistry, School of Physical Sciences, Federal University of Technology, Owerri, Nigeria
Opah Solomon, Department of Chemistry, School of Physical Sciences, Federal University of Technology, Owerri, Nigeria
Characterization of the pristine barite mineral was established using a scanning electron microscope (SEM) and Fourier Transform Infra-Red (FTIR). Barite was applied for sodium oleate and sodium palmitate adsorption in aqueous solutions. Equilibrium adsorption data were fitted into two adsorption isotherms, three kinetic models and thermodynamic study. The concentration of the ion and pH in the solution proved to be a controlling factor in the adsorption process. Sodium oleate and sodium palmitate soaps adsorbed strongly onto the barite mineral at pH 9 and a temperature of 293k. They result was affected by the high bulk density and chemical resistance nature of barite indicated by successive increase in dosage amount. The effect of concentration and time typically gave a C-type adsorption isotherm. Adsorptive isotherm showed that sodium palmitate adsorption over natural barite was better described by the Langmuir adsorption isotherm while oleate desorption gave a good fitting with Freundlich isotherm. The adsorptive kinetics of sodium palmitate fitted well into pseudo 1 st order and 2nd order kinetics. Intra particle diffusion was not the rate-determining step. Thermodynamic study showed a physio-sorption that was exothermic. Hence the findings showed that pristine barite absorbs at optimum pH and temperature of 9 and 293K.
Nwoko Christopher Ikpe Amadi,
Nkwoada Amarachi Udoka,
An Experimental Investigation of Pristine Barite Adsorption on Sodium Oleate and Sodium Palmitate, American Journal of Physical Chemistry.
Vol. 7, No. 4,
2018, pp. 63-72.
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