Abstract
| Language | English |
|---|---|
| Pages | 3233-3240 |
| Journal | Water Research |
| Volume | 38 |
| Issue number | 14-15 |
| Early online date | 22 Jun 2004 |
| DOIs | |
| Publication status | E-pub ahead of print - 22 Jun 2004 |
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Keywords
- Titanium dioxide
- Estrogens
- Photocatalysis
- UVA photolysis
- Recombinant yeast screen
Cite this
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Rapid loss of estrogenicity of steroid estrogens by UVA photolysis and photocatalysis over an immobilised titanium dioxide catalyst. / Coleman, Heather; Routledge, E.J.; Sumpter, J.P.; Eggins, B.R.; Byrne, J.A.
In: Water Research, Vol. 38, No. 14-15, 22.06.2004, p. 3233-3240.Research output: Contribution to journal › Article
TY - JOUR
T1 - Rapid loss of estrogenicity of steroid estrogens by UVA photolysis and photocatalysis over an immobilised titanium dioxide catalyst
AU - Coleman, Heather
AU - Routledge, E.J.
AU - Sumpter, J.P.
AU - Eggins, B.R.
AU - Byrne, J.A.
PY - 2004/6/22
Y1 - 2004/6/22
N2 - The presence of low levels of natural and synthetic steroid estrogens in the aquatic environment, and their biological effects on aquatic organisms, are presently issues of concern. In this study, we investigated the temporal removal of estrogenic activity of several potent and environmentally relevant steroid estrogens by photocatalysis over an immobilised titanium dioxide (TiO2) catalyst. We used a recombinant yeast assay to measure estrogenic activity, which provided detection limits within the reactor of 53 ng/l for 17β-estradiol and 17α-ethinylestradiol, and 100 ng/l for estrone. Pseudo-first-order kinetic data showed that photocatalysis over titanium dioxide was equally effective at removing the estrogenic activity of all three steroid substrates in aqueous solutions (initial concentrations of 10 μg/l) with a 50% reduction in estrogenicity within 10 min. In control experiments without TiO2 catalyst, the rate of UVA photolysis of the steroid substrates varied, but was most effective with 17α-ethinylestradiol followed by estrone, and was least effective with 17β-estradiol (0.42, 0.2 and
AB - The presence of low levels of natural and synthetic steroid estrogens in the aquatic environment, and their biological effects on aquatic organisms, are presently issues of concern. In this study, we investigated the temporal removal of estrogenic activity of several potent and environmentally relevant steroid estrogens by photocatalysis over an immobilised titanium dioxide (TiO2) catalyst. We used a recombinant yeast assay to measure estrogenic activity, which provided detection limits within the reactor of 53 ng/l for 17β-estradiol and 17α-ethinylestradiol, and 100 ng/l for estrone. Pseudo-first-order kinetic data showed that photocatalysis over titanium dioxide was equally effective at removing the estrogenic activity of all three steroid substrates in aqueous solutions (initial concentrations of 10 μg/l) with a 50% reduction in estrogenicity within 10 min. In control experiments without TiO2 catalyst, the rate of UVA photolysis of the steroid substrates varied, but was most effective with 17α-ethinylestradiol followed by estrone, and was least effective with 17β-estradiol (0.42, 0.2 and
KW - Titanium dioxide
KW - Estrogens
KW - Photocatalysis
KW - UVA photolysis
KW - Recombinant yeast screen
U2 - 10.1016/j.watres.2004.04.021
DO - 10.1016/j.watres.2004.04.021
M3 - Article
VL - 38
SP - 3233
EP - 3240
JO - Water Research
T2 - Water Research
JF - Water Research
SN - 0043-1354
IS - 14-15
ER -