Ionic strength and pH influence the adsorption of cations due to the variation of the electric charge in soils rich in iron (Fe) and aluminum (Al) oxides and hydroxides. The objective of this study was to investigate the influence of pH and ionic strength on zinc (Zn) sorption in a highly weathered Brazilian soil. The equations of Langmuir and Freundlich were adjusted to describe the adsorption. ORDER REPRINTSZinc adsorption increased with the elevation of the pH and with the decrease of the ionic strength. The pH effect, however, surpassed the effect of the ionic strength. The largest variation of adsorption with pH suggests the presence of high-affinity adsorption sites. Langmuir and Freundlich equations were well fitted to zinc adsorption at all pH and ionic strength values. At all ionic strength and pH values, maximum adsorption in the surface layer, with negative balance of charge, was higher than in the subsoil, wherein the zero point of salt effect was higher than the soil pH in CaCl 2 .
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.