Removal of Cu2+ and Ni2+ from Aqueous Solution using SnO2 Nanomaterial effect of: pH, Time, Temperature, interfering cations

Authors

Abigail M. Zepeda, The University of Texas Rio Grande Valley
Daisy Gonzalez, The University of Texas Rio Grande Valley
Luis Gonzalez Heredia
Karina Marquez, The University of Texas Rio Grande Valley
Cesar Perez, The University of Texas Rio Grande Valley
Erika Pena, The University of Texas Rio Grande Valley
K. Flores, The University of Texas Rio Grande Valley
Carolina Valdes, The University of Texas Rio Grande Valley
Thomas Eubanks, The University of Texas Rio Grande Valley
Jason Parsons, The University of Texas Rio Grande Valley
J. Cantu, The University of Texas Rio Grande Valley

Document Type

Article

Publication Date

9-2018

Abstract

Tin oxide, SnO2, nanomaterial was synthesized and tested for the removal of Cu2+ and Ni2+ ions from aqueous solutions. Various parameters for the binding were investigated in batch studied, which included pH, time, temperature, and interferences. In addition, isotherm studied were performed to determine the maximum binding capacity for both Cu2+ and Ni2+ ions. The optimal binding pH determined from the effects of pH were to be at pH 5 for both the Cu2+ and Ni2+ ions. The isotherm studies were performed at temperatures of 4°C, 25 °C, and 45 °C for both the Cu2+ and Ni2+ ions and were found to follow the Langmuir isotherm model. The binding capacities for the Cu2+ ions were 2.63 mg/g, 2.95 mg/g and 3.27 mg/g at the aforementioned temperatures, respectively. Whereas the binding capacities for Ni2+ were 0.79 mg/g, 1.07 mg/g, and 1.46 mg/g at the respective temperatures. The determined thermodynamic parameters for the binding showed that the binding processes for the reactions were endothermic, as the ΔG was observed to decrease with decreasing temperatures. As well the ΔH was 28.73 kJ/mol for Cu2+ (III) and 13.37 kJ/mol for Ni2+. The ΔS was observed to be 92.65 J/mol for Cu2+ and 54.53 J/mol for Ni2+. The free energy of adsorption for the Cu2+ was determined to be 13.99 kJ/mol and the activation energy for the binding of Ni2+ was determined to be 8.09 KJ/mol. The activation energy data indicate that the reaction was occurring through chemisorption

Comments

Published by Elsevier B.V. Original published version available at https://www.sciencedirect.com/science/article/pii/S0026265X18305708

Recommended Citation

Zepeda, Abigail M., Daisy Gonzalez, Luis Gonzalez Heredia, Karina Marquez, Cesar Perez, Erika Pena, K. Flores, et al. 2018. “Removal of Cu2+ and Ni2+ from Aqueous Solution Using SnO2 Nanomaterial Effect of: PH, Time, Temperature, Interfering Cations.” Microchemical Journal 141 (September): 188–96. https://doi.org/10.1016/j.microc.2018.05.020.

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.

Publication Title

Microchemical Journal

DOI

10.1016/j.microc.2018.05.020