Investigation into the thermodynamics and kinetics of the binding of Cu2+ and Pb2+ to TiS2 nanoparticles synthesized using a solvothermal process

Authors

Jesus Cantu, The University of Texas Rio Grande Valley
John Valle, The University of Texas Rio Grande Valley
Kenneth Flores, The University of Texas Rio Grande Valley
Diego Gonzalez, The University of Texas Rio Grande Valley
Carolina Valdes, The University of Texas Rio Grande Valley
Jorge Lopez, The University of Texas Rio Grande Valley
Victoria Padilla, The University of Texas Rio Grande Valley
Mataz Alcoutlabi, The University of Texas Rio Grande ValleyFollow
Jason Parsons, The University of Texas Rio Grande ValleyFollow

Document Type

Article

Publication Date

12-2019

Abstract

In the present study, titanium (IV) sulfide (TiS2) was synthesized and investigated for the removal of Cu2+ and Pb2+ ions from aqueous solutions. TiS2 nanoparticles synthesized through a solvothermal synthesis were characterized using x-ray diffraction (XRD) and scanning electron microscopy (SEM). The average particle size for the TiS2 material was determined to be 8.03 ± 0.98 nm from the diffraction pattern. Studies were performed to examine the effects of pH, temperature, time, and interfering ions on the binding of Cu2+ and Pb2+ to the TiS2. As well isotherm studies were performed to determine the binding capacity of TiS2 for both Cu2+ and Pb2+ ions. The pH profile studies showed optimal binding occurred at pH 2 for the sorption of both Cu2+ and Pb2+ to the TiS2. The isotherm studies showed the adsorption capacities at temperatures of 4, 22, and 45 °C for Cu2+ were 243, 222, and 153 mg/g, respectively. An opposite trend in the adsorption was observed for Pb2+ binding to the TiS2. The observed binding capacities for Pb2+ were 32, 166, and 357 mg/g, at temperatures of 4, 22, and 45 °C, respectively. The thermodynamic parameters for binding showed a non-spontaneous process for the sorption of Cu2+ whereas a spontaneous binding process was observed for the sorption of Pb2+. Additionally, the binding of Cu2+ on TiS2 in the presence of interfering ions (Na+, K+, Mg2+, and/or Ca2+) was observed to decrease at high concentrations; however, the binding of Pb2+ was unaffected by the presence of the same cations.

Comments

© 2019, Elsevier B.V. Original published version available at https://doi.org/10.1016/j.jece.2019.103463

Recommended Citation

Cantu, J., Valle, J., Flores, K., Gonzalez, D., Valdes, C., Lopez, J., Padilla, V., Alcoutlabi, M., & Parsons, J. (2019). Investigation into the thermodynamics and kinetics of the binding of Cu2+ and Pb2+ to TiS2 nanoparticles synthesized using a solvothermal process. Journal of Environmental Chemical Engineering, 7(6), 103463. https://doi.org/10.1016/j.jece.2019.103463

Creative Commons License

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

Publication Title

Journal of Environmental Chemical Engineering

DOI

10.1016/j.jece.2019.103463