Theses and Dissertations

Date of Award

12-2017

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry

First Advisor

Dr. Jason G. Parsons

Second Advisor

Dr. Evangelia Kotsikorou

Third Advisor

Dr. Jose J. Gutierrez

Abstract

Heavy metal contamination in water solutions has been a major concern since many transition metals don’t play a role in any biological function and are actually detrimental to human health. There have been several techniques that have been implemented for the remediation of heavy metal contaminants. For this project, three metal sulfides—Fe7S8, ZnS, TiS 2—were synthesized and studied for their capabilities to remove Pb(II) and Cu(II) from water solutions. Several parameters were investigated to determine the effects of pH, time, temperature, binding capacities, and interfering ions. The room temperature adsorption capacities ranged 6.23–333.3 mg/g for Pb(II) and 1.31–250 mg/g for Cu(II). The thermodynamic parameters determined that the process for the binding of Pb(II) to 7S8, ZnS, TiS2, ZnS (absence of light), and TiS2 was spontaneous whereas the binding with ZnS in ambient light was non-spontaneous. On the other hand, the binding of Cu(II) to 7S8, ZnS, TiS2 and ZnS was non-spontaneous but for TiS2 the reaction was spontaneous.

Comments

Copyright 2017 Jesus M. Cantu Jr. All Rights Reserved.

https://www.proquest.com/dissertations-theses/remediation-lead-copper-ions-water-solutions/docview/2015044869/se-2?accountid=7119

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