Abstract
The effect of ionic charge on the adsorption of sodium-palmitate and sodium-laurate onto galena, hematite and cassiterite surfaces in aqueous media was studied. The adsorption capacities were determined as a function of adsorbate concentration in the presence of various anions and cations at pH 7.31 and 29 °C. Positively charged ions depressed the adsorption capacity in the order: K+> Ba2+> Al3+, showing a reverse correlation with the charge to size ratio of these ions indicating a possible expansion of the double layer that results from predominant diffusion effect and electrostatic effect to some extent. The negatively charged ion enhanced adsorption capacity in the order: PO43-> SO42-> NO3-. This is attributed to the compression of the double layer through electrostatic interaction. In all the studies the adsorption capacities for the adsorbents were in the order: galena > hematite > cassiterite corresponding to the trend in the specific surface area of the adsorbents.
Highlights
In order to determine the role of electrostatic interaction in the adsorption of sodiumpalmitate and sodium-laurate onto galena, hematite and cassiterite in aqueous media, study on the adsorption process in the presence of various ionic charge and ionic concentrations at pH 7.31 and 29 oC was undertaken
Equilibrium sorption study of Al3+, Co2+, Ag+ in aqueous solutions by fluted pumpkin biomass showed that fluted pumpkin waste could be used for the removal of Al3+, Co2+, Ag+ from wastewater and that ionic radius of the ions influenced the rate of metal ion migration to the biomass surface
Calculations from experimental results and sample analysis show that the specific surface area of galena is 128.7 m2/g, hematite is 118.5 m2/g and cassiterite is 88.1 m2/g
Summary
In order to determine the role of electrostatic interaction in the adsorption of sodiumpalmitate and sodium-laurate onto galena, hematite and cassiterite in aqueous media, study on the adsorption process in the presence of various ionic charge and ionic concentrations at pH 7.31 and 29 oC was undertaken. Soap molecule Previous studies on adsorption at different phases suggest that the process depends on factors such as temperature, pressure, effective surface area, pH, concentration, ionic charge, ionic strength, nature of adsorbate and adsorbent[1,2,3,4,5].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
