Adsorption of 3H-Labeled 17-β Estradiol on Powdered Activated Carbon
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Three source waters, two model waters (Ultrapure (natural organic matter (NOM)-free)) water and Suwannee River NOM isolate by reverse osmosis (SR-NOM)) and a natural water (Colorado River water (CRW)), were tested. Those waters were selected to represent a relatively hydrophobic NOM (SR-NOM) and a relatively hydrophilic NOM (CRW) based on their specific ultraviolet absorbance (SUVA = UVA254/DOC) values. The adsorption of an estrogenic compound, 17β-estradiol (E2), on powdered activated carbons (PACs) was investigated. Kinetic and PAC dose-response experiments were performed with PACs at an initial concentration of 0.1 nM (27 ng L−1). Additional experiments were also performed at various initial concentrations ranging from 0.025 nM (6.8 ng L−1) to 5.0 nM (1360 ng L−1) to determine the effects of initial concentration on E2 adsorption. In separate experiments, 17β-estradiol was introduced to PAC as a pure component, in binary mixtures with other salts (NaCl, Na2SO4, and CaCl2), and under varying pH conditions (4.0, 7.5, and 11.0) to determine the effects of pH and background ions on E2 adsorption. Samples were measured by liquid scintillation counting using 3H radio-labeled E2. Without preconcentration, a method detection limit using the liquid scintillation counter was 0.005 nM (1.36 ng L−1), respectively. Increasing contact time and PAC dose improved compound removal. Activated carbon is a viable technology for water treatment plants.
Keywordsadsorption endocrine disrupting compound powdered activated carbon radio-labeled 17β-estradiol water treatment
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- Behymer, T. D., Bellar, J. S., Ho, J. S. and Budde, W. L.: 1993, Methods for the Determination of Organic Compounds in Drinking Water. US Environmental Protection Agency, Supplement II; Revision 1.1, Cincinnati.Google Scholar
- Belfroid, A. C., Van der Horst, A., Vethaak, A. D., Schafer, A. J., Rijs, G. B. J., Wegener, J. and Cofino, W. P.: 1999, ‘Analysis and occurrence of estrogenic hormones and their glucuronides in surface water and waste water in The Netherlands’, Science of the Total Environment. 225, 101–108.CrossRefPubMedGoogle Scholar
- Carlile, P., Fielding, M., Harding, L., Hart, J., Hutchison, J. and Kanda, R.: 1996, ‘Effect of water treatment processes on oestrogenic chemicals’, in: UK WIR Report 96/DW/05/01.Google Scholar
- Knappe, D. R. U., Matsui, Y., Snoeyink, V. L., Roche, P., Prados, M. J. and Bourbigot, M. M.: 1998, ‘Predicting the capacity of powdered activated carbon for trace organic compounds in natural waters’, Environment Science & Technology 32, 1694–1698.Google Scholar
- Kuch, H. M. and Ballschmiter, K.: 2001, ‘Determination of endocrine-disrupting phenolic compounds and estrogens in surface and drinking water by HRGC-(NCI)-MS in the picogram per liter range’, Environmental Science & Technology 35, 3201–3206.Google Scholar
- Layton, A. C., Gregory, B. W., Seward, J. R., Schultz, T. W. and Sayler, G. S.: 2000, ‘Mineralization of steroidal hormones by biosolids in wastewater treatment systems in Tennessee USA’, Environmental Science & Technology 34, 3925–3931.Google Scholar
- Nasu, M., Goto, M., Kato, H., Oshima, Y. and Tanaka, H.: 2001, ‘Study on endocrine disrupting chemicals in wastewater treatment plants’, Water Science and Technology 43, 101– 108.Google Scholar
- Siddiqui, M., Zhai, W., Amy, G. and Mysore, C.: 1996, ‘Bromate ion removal by activated carbon’, J. American Water Works Association 30, 1651–1660.Google Scholar
- Snyder, S. A., Villeneuve, D. L., Snyder, E. M. and Giesy, J. P.: 2001, ‘Identification and quantification of estrogen receptor agonists in wastewater effluents’, Environmental Science & Technology 35, 3620–3625.Google Scholar
- Snyder, S. A., Keith, T. L., Verbrugge, D. A., Snyder, E. M., Gross, T. S., Kannan, K. and Giesy, J. P.: 1999, ‘Analytical methods for detection of selected estrogenic compounds in aqueous mixtures’, Environmental Science & Technology 33, 2814–2820.Google Scholar
- Witters, H. E., Vangenechten, C. and Berckmans, P.: 2001, ‘Detection of estrogenic activity in Flemish surface waters using an in vitro recombinant assay with yeast cells’, Water Science and Technology. 43, 117–123.Google Scholar