Electrostatic and hydrophobic interaction of ions in soil with anionic surfactant micelles in water

Abstract

The purpose of this study was to determine the interaction of carbonic, silicon and calcareous soils on micellar behavior critical micelle concentration of anionic surfactants in water. The sources, that were used in experimental studies, were composed of the activated carbon (AC) as carbon source, foundry mold sand waste (FMSW) as silicon source, marble waste powder (MWP) as a lime source and commercial linear alkyl benzene sulfonic acid (LABSA) as an anionic surfactant. The selected variable parameters were AC amount (0.01, 0.05, 0.1, 0.2 g/100 ml), FMSW amount (0.1, 0.2 and 0.3 g/100 mL), MWP amount (0.1, 0.2 and 0.3 g/100 mL), contact time (10-1,440 min), and concentration of surfactant (100 and 200 ppm) The interaction between C4+, Si2+ and Ca2+ ions, respectively, contained in AC, FMSW, MWP, and micelles were determined through measuring the conductivity, pH and absorbance values. In conclusion, it is thought that the environmental damage might be more because of the fact that the micelles, contained in anionic surfactant solutions released into the environment, could have an uncontrolled dispersion as a result of their transformation into dilute solution with rain effect in time and into monomer structures due to electrostatic and hydrophobic interaction occurring when the micelles contact charged (+) ions in the soil.