Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 3/6/2006
Publication Date: 6/26/2006
Citation: Shappell, N.W., Ro, K.S., Madsen, P., Horowitz, C., Hunt, P.G., Collins, T.J., Vrabel, M. 2006. Degradation of estradiol and ethinylestradiol with taml oxidant activator and hydrogen peroxide. Meeting Abstract. 10th Annual Green Chemistry & Engineering Conference, Washington, DC, June 26-30, 2006.
Technical Abstract: Endocrine disruptors have been found in our surface waters as a result of incomplete wastewater treatment and contamination from animal rearing facilities. Two identified contaminants with estrogenic activity are 17ß-estradiol (E2, the most potent natural estrogenic hormone) and 17alpha-ethinylestradiol (EE2, the synthetic estrogen found in most birth control pills). A peroxide-activating catalyst Fe-TAML® (TAML® is tetraamido macrocyclic ligand) was evaluated for its capacity to degrade these compounds. While EE2 is resistant to most biological degradation processes, the Fe-TAML catalyst plus hydrogen peroxide (pH 10) resulted in degradation of greater than or equal to 95% within 5 minutes at room temperature (by HPLC analysis). Similar degradation was observed with E2 when the Fe-TAML:E2 ratio was 1:250, while degradation kinetics were measurable using ratios of 1:1000. The reaction closely followed first-order decay kinetics. Using LC MS-MS, neither estrogenic metabolite estrone nor estradiol were detected post-reaction. These results indicate a potential use for Fe-TAML in remediation of municipal and agricultural wastewater containing estrogenic compounds.