A Proposal for The Mechanism of The Iron-Ascorbate, Fenton, and Hydroxyl Radical-Quenching Series

Authors

Jonathan Velasco, University of Texas-Pan American

Date of Award

5-2010

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Chemistry

First Advisor

Dr. Philip Delassus

Second Advisor

Dr. Elamin E. Ibrahim

Third Advisor

Dr. Narayan Bhat

Abstract

The Fenton reaction between [Fe(II)] and [HOOH] is observed in the presence of ascorbic acid, [AscH-], during [Fe(III)] and HO• reduction; this is done as part of consecutive redox reactions between [Fe(III)] and [Fe(II)]. As a result, the rate orders with respect to [Fe(III)], ascorbic acid, and [HOOH] are of (approximately) 2nd, 1st, and 4 th order, respectively. However, the rate constants for each reaction in this study show patterns when measured against solution pH; empirically, reactions proceed faster at smaller pH and vice versa.

Comments

Copyright 2010 Jonathan Velasco. All Rights Reserved.

https://www.proquest.com/dissertations-theses/proposal-mechanism-iron-ascorbate-fenton-hydroxyl/docview/726027934/se-2

Granting Institution

University of Texas-Pan American