Initial predictions of the concentrations and distribution of 17β-oestradiol, oestrone and ethinyl oestradiol in 3 English rivers
Williams, R.J.; Juergens, M.D. ORCID: https://orcid.org/0000-0002-6526-589X; Johnson, A.C.
ORCID: https://orcid.org/0000-0003-1570-3764.
1999
Initial predictions of the concentrations and distribution of 17β-oestradiol, oestrone and ethinyl oestradiol in 3 English rivers.
Water Research, 33 (7).
1663-1671.
https://doi.org/10.1016/S0043-1354(98)00386-8
Abstract/Summary
The application of the EXAMS model to estimate the likely distribution of the steroid oestrogens, 17β-oestradiol, oestrone and ethinyl-oestradiol in the Rivers Thames, Calder and Aire, U.K. is described. The model uses parameters estimated from laboratory measurements using material collected from each of the three rivers or from the literature. Total concentrations in the water column were predicted to be similar for 17β-oestradiol and oestrone and an order of magnitude less for ethinyl-oestradiol, reflecting the difference in the sewage input loads of the chemicals used in the models. Concentrations under average conditions were predicted to (a) be found mainly in the dissolved phase and (b) to vary between 0.21 and 0.37 ng l−1 for 17β-oestradiol, 0.27 and 0.44 ng l−1 for oestrone and 0.024 and 0.038 ng l−1 for ethinyl-oestradiol. Under low-flow conditions, predicted concentrations increased by a factor of 4 to 10 times the average concentrations at the point of discharge. Predicted degradation processes in the water column were only significant under low-flow conditions and volatilization was negligible. A simple assessment of the model sensitivity to selected parameters identified those that were most significant in determining the distribution of the chemicals.
Item Type: | Publication - Article |
---|---|
Digital Object Identifier (DOI): | https://doi.org/10.1016/S0043-1354(98)00386-8 |
UKCEH and CEH Sections/Science Areas: | _ Pre-2000 sections |
ISSN: | 0043-1354 |
Additional Keywords: | 7β-oestradiol, oestrone, ethinyl-oestradiol, oestrogens, steroid, rivers, EXAMS, modelling, fate, exposure, Thames, Calder, Aire, U.K. |
NORA Subject Terms: | Ecology and Environment Health Biology and Microbiology |
Date made live: | 19 Aug 2015 09:28 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/511494 |
Actions (login required)
![]() |
View Item |
Document Downloads
Downloads for past 30 days
Downloads per month over past year