Removal of cobalt and nickel from water using MnO2 and Mn3O4 nanomaterials

Authors

Maria Dolores Pacheco, University of Texas-Pan American

Date of Award

5-2015

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry

First Advisor

Dr. Jason Parsons

Second Advisor

Dr. John Villarreal

Third Advisor

Dr. Evangelia Kotsikorou

Abstract

Nanomaterials MnO2 and Mn3O4 were synthesized using a titration/precipitation technique and characterized with powder XRD. A pH assay determined the optimum binding for cobalt and nickel occurred at pH 5 for both nanomaterials. A time dependency study determined that cobalt and nickel required more time with MnO2 for maximum adsorption than Mn3O4. The binding capacity study showed cobalt and nickel have good binding capacity with both nanomaterials. Interfering ion assay in the presence of Na+ , Ca2+ and Mg2+ showed minimal difference in the adsorption of cobalt and nickel to MnO2 or Mn3O4. Cobalt and nickel showed a reduction in adsorption with K+ binding to MnO2. The thermodynamic studies showed that the reactions for both cobalt and nickel with MnO2 and Mn3O4 are spontaneous and occur through physical adsorption. The kinetics studies revealed that the adsorption of cobalt and nickel with MnO2 and Mn3O4 follow a first order kinetics reaction.

Comments

Copyright 2015 Maria Dolores Pacheco. All Rights Reserved.

https://www.proquest.com/dissertations-theses/removal-cobalt-nickel-water-using-mno-sub-2-mn-3/docview/1708672630/se-2

Granting Institution

University of Texas-Pan American