Paper No. JAWRA-13-0062-P of the Journal of the American Water Resources Association (JAWRA).
Featured Collection: Contaminants of Emerging Concern II William Battaglin and Alan Kolok - Guest Editors
Effect of Light on Biodegradation of Estrone, 17β-Estradiol, and 17α-Ethinylestradiol in Stream Sediment†
Article first published online: 1 APR 2014
© 2014 American Water Resources Association. This article is a U.S. Government work and is in the public domain in the USA
JAWRA Journal of the American Water Resources Association
Volume 50, Issue 2, pages 334–342, April 2014
How to Cite
2014. Effect of Light on Biodegradation of Estrone, 17β-Estradiol, and 17α-Ethinylestradiol in Stream Sediment. Journal of the American Water Resources Association (JAWRA) 50(2):334-342. DOI: 10.1111/jawr.12157and ,
Discussions are open until six months from print publication.
- Issue published online: 1 APR 2014
- Article first published online: 1 APR 2014
- Manuscript Accepted: 13 MAY 2013
- Manuscript Received: 8 MAR 2013
- U.S. Geological Survey Toxic Substances Hydrology Program
- endocrine disruption;
Biodegradation of [A-ring 14C] Estrone (E1), 17β-estradiol (E2), and 17α-ethinylestradiol (EE2) to 14CO2 was investigated under light and dark conditions in microcosms containing epilithon or sediment collected from Boulder Creek, Colorado. Mineralization of the estrogen A-ring was observed in all sediment treatments, but not epilithon treatments. No difference in net mineralization between light and dark treatments was observed for 14C-E2. Net mineralization of 14C-E1 and 14C-EE2 was enhanced in light treatments. Extents of 14CO2 accumulation and rates of mineralization were significantly greater for E2 than E1 under dark conditions, but were comparable under light conditions. These results indicate substantial differences in the uptake and metabolism of E1 and E2 in the environment and suggest biorecalcitrance of E1 relative to E2 in light-limited environments. The extent of 14CO2 accumulation and rate of mineralization for EE2 in dark treatments were less than half of that observed for E2 and generally lower than for E1, consistent with previous reports of EE2 biorecalcitrance. However, 14CO2 accumulation and rates of mineralization were comparable for EE2, E2, and E1 under light conditions. These results indicate photoactivation and/or phototransformation/photodegradation processes can substantially enhance heterotrophic biodegradation of estrogens in sunlit environments and may play an important role in estrogen transport and attenuation.