—Natural and synthetic estrogens present a potential threat to aquatic life. This is due to their alarming effects on reproduction and developmental processes of aquatic organisms. These estrogens disrupt the organisms’ endocrine systems and decreased their fertility. The estrogens reach the aquatic environment through urban and industrial waste discharges. Irradiation of the wastewater under ultra-violet light showed that these estrogens could be degraded. In this study, Estrone (E1) was chosen as a representative of the estrogens. The photochemical behavior of E1 was investigated under ultra-violet irradiation at 254 nm and 350 nm. The photodegradation of E1 yielded several intermediates. The concentrations of estrone and the intermediates were monitored during photodegradation using a high performance liquid chromatography (HPLC) method. The photodegradation of E1 at both wavelengths followed pseudo-first-order kinetics with respect to E1 concentration. The HPLC chromatograms indicated that three peaks were sequentially formed with time through plausible consecutive reactions. Further study is needed to identify the reaction intermediates/products in order to propose the detailed reaction mechanisms.
—Estrone, photodegradation, steriod estrogens.
The authors are with the Department of Natural Sciences, University of Michigan-Dearborn, MI, 48128 Michigan (e-mail: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org).
Cite:Yiwei Deng, Paul Diven, and Padma Kadiyala, "Effect of Irradiation Wavelength on Kinetics of Direct Photodegradation of Estrone," International Journal of Environmental Science and Development vol. 6, no. 3, pp. 187-190, 2015.