Issue 2, 2010
From the journal:

Journal of Environmental Monitoring

Electrochemical degradation of 17-alpha-ethinylestradiol (EE2) and estrogenic activity changes

Yujie Feng,*a   Ce Wang,a   Junfeng Liuab  and  Zhaohan Zhanga  

* Corresponding authors

a State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No 73 Huanghe Road, Nangang District, Harbin, China
E-mail: Yujief@hit.edu.cn
Fax: +86-451-82373516
Tel: +86-451-86283068

b Exprimental Center, School of Municipal & Environmental Engineering, Harbin Institute of Technology, No 73 Huanghe Road, Nangang District, Harbin, China

Abstract

17-α-ethinylestradiol (EE2) as one of typical representatives of steroid estrogens is detrimental to endocrine systems of animals and humans due to its potential estrogenic activity. The degradation of EE2 in aquatic solution by electrocatalytic oxidation applying Ti-based SnO2 (Ti/SnO2) electrode as the anode was investigated. A pseudo-first-order kinetics under various initial concentrations of EE2 was obtained and it was found that the calculated kinetic constant was determined as 0.112 min−1, 0.053 min−1, 0.023 min−1 and 0.019 min−1, which tended to rise in inverse proportion to EE2 concentration within selected content of EE2 as 0.5 mg L−1, 2.0 mg L−1, 5 mg L−1 and 10 mg L−1. Frozen recombinant yeast was introduced to evaluate estrogenic activities of an aqueous solution of 2.0 mg L−1 EE2 and oxidation products. The concentration of EE2 and EE2 equivalents (EEEQs) decayed 96.5%, 96.3% respectively in 15 min and 78.5% reduction of TOC in 8 h was observed under current density conditions of 10 mA cm−2 and 0.2 M Na2SO4 as the electrolyte in the process of electrolysis. On the basis of the results obtained, it indicates that the estrogenic activities of the intermediate products can be negligible.

Graphical abstract: Electrochemical degradation of 17-alpha-ethinylestradiol (EE2) and estrogenic activity changes

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Article information

DOI
https://doi.org/10.1039/B923495K
Article type
Communication
Submitted
10 Nov 2009
Accepted
14 Dec 2009
First published
20 Jan 2010

J. Environ. Monit., 2010,12, 404-408

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Electrochemical degradation of 17-alpha-ethinylestradiol (EE2) and estrogenic activity changes

Y. Feng, C. Wang, J. Liu and Z. Zhang, J. Environ. Monit., 2010, 12, 404 DOI: 10.1039/B923495K

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