Adsorption of Polyoxyethylenic Nonionic and Anionic Surfactants from Aqueous Solution: Effects Induced by the Addition of NaCl and CaCl2

Effect of adsorption site potential on adsorption of sodium dodecylbenzenesulfonate in highly humic volcanic ash soil

“…The amount of DBS adsorbed increased as the electrolyte concentration increased for both B-DBS and L-DBS. This result is consistent with those of other studies (Nevskaia et al 1998;Paria et al 2005;Li et al 2008). The increase occurred because at higher electrolyte concentrations the repulsive electric potential at the adsorption site became smaller, as shown in the next section, from screening of the electric field.…”

“…They showed that an increase in the electrolyte concentration causes screening of the electric attraction between the surfactant and metal surface and leads to a decrease in adsorption at lower surfactant concentrations. In contrast, an increase in the electrolyte concentration enhances the adsorption of anionic surfactant onto a negatively charged solid (Nevskaia et al 1998;Paria et al 2005;Li et al 2008). However, the theoretical interpretation for those phenomena has not been conducted exactly, although those for the adsorption on oppositely charged surface has been done well.…”

Adsorption of tetradecanoic acid on kaolinite minerals: Using flash pyrolysis to characterise the catalytic efficiency of clay mineral adsorbed fatty acids

“…The presence of Na + ions might enhance the adsorption of carboxylic acids on kaolinite as the Na + metal ions compensate negative surface charge of the basal planes on kaolinite and involve in interaction with the carboxylic acid anions. This synthesis is parallel with those of Nevskaia et al (1998) who have shown an increase in adsorption of anionic surfactant on quartz and kaolin in the presence of NaCl.…”

Transport of TiO2 nanoparticles in soil in the presence of surfactants

“…Repulsive interaction showed to determine the transport of nTiO 2 , as more SDBS led to more nTiO 2 outflow. The adsorption of SDBS on soil depended generally on the adsorption sites, and the positive charges on the surface of soil particles would provide the favorable sites for SDBS sorption (Nevskaia et al, 1998;Saleh et al, 2008). With the time going, more and more SDBS was adsorbed on the surface of soil particles.…”