Dissertations and Theses

Date of Award


Document Type




First Advisor

Urs Jans

Second Advisor

Barbara Zajc

Third Advisor

Glen Kowach


Hematite, adsorbed Fe(II), adsorbed Fe(II) kinetics


The reaction of hexabromocyclododecane (HBCDD), a widely used brominated flame retardant, was studied in a heterogenous mixture containing reactive Fe(II) adsorbed to the iron oxide hematite. The adsorbed Fe(II)/iron oxide system has shown to be a potent reductant in the transformation of organic contaminants with relatively water soluble organic contaminants. There currently aren’t many studies involving hydrophobic organic contaminants, such as HBCDD, in this reducing Fe(II)/iron oxide system. The results indicate that across the pHs 6.86, 6.95, 7.15 and 7.35 γ and β-HBCDD are degraded within a couple days. The pseudo-first order rate constants at pH 6.95 are 0.049 hr-1 for β-HBCDD and 0.043 hr-1 γ-HBCDD, reaching their half-life within 15 hours of the reaction. These experiments also illustrate the isomers experience slightly different reactivities with different pHs with α-HBCDD reacting the slowest.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.