Abstract—Iron ore as possible adsorbent for metallic salts of fatty acid (Mx+-SFA) oils was investigated. Experimental constants from several kinetic models were used to interpret Mx+-SFA uptake. Mode of diffusion was also studied. Applicability tests for adopted models favors the Pseudo second order kinetics which presented high R2 values > of 0.9; high precision or least qcal/qexp values of ratio within 1.0 for the K+-SFA, Ca 2+ -SFA and Al 3+ -SFA sorption. The Pseudo second order equation also gave least values for the three error function s viz: 9.6×10 -4 to 5.4×10 - 3 , 3.1×10 -2 to 7.4×10 -2 and 4.6×1 0 -3 to 2.5 ×10 - 3 for EAB S, SSE and X2 respectively. Multiple linearity presented by intra-particle diffusio n plots is of three distinct stages of linear initial, linear intermediate and linear last portions. These stages are coupled with the nonpassage of lines throu gh the origin being an indication that other diffusion models such as mass transfer or film diffusion exists and that the intra-particle diffusion is not the only rate factor controlling Mx+-SFA sorption.
Index Terms—Surfactants, ores, kinetics, diffusion, metallic soap, adsorption.
A. U. Itodo is with the Department of Chemical Sciences, Federal University Wukari, Nigeria (e-mail: itodoson2002@gmail.com).
E. E. Etim is with the Department of Chemical Sciences, Federal University Wukari as well is with Department of Inorganic and Physical Chemistry, India Institute of Science, 56012, Bangalore (e-mail: emmaetim@gmail.com).
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Cite:Itodo Adams Udoji and Emmanuel Edet Etim, "Dynamics of Mx+ Salts of Fatty Acids Adsorption onto Metallic Ores," International Journal of Environmental Science and Development vol. 6, no. 3, pp. 205-210, 2015.
