17α-Ethinylestradiol removal from water by magnetic ion exchange resin

doi:10.1016/j.cjche.2017.08.006

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (4): 864-869.DOI: 10.1016/j.cjche.2017.08.006

• Energy, Resources and Environmental Technology • 上一篇下一篇

17α-Ethinylestradiol removal from water by magnetic ion exchange resin

Liang Wang^1,2, Lu Liu², Zhaohui Zhang^1,2, Bin Zhao^1,2, Junjing Li^1,2, Bingjie Dong², Nian Liu²

1 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China;
2 Department of Environmental Engineering, Tianjin Polytechnic University, Tianjin 300387, China

收稿日期:2017-06-23 修回日期:2017-08-06 出版日期:2018-04-28 发布日期:2018-05-19
通讯作者: Zhaohui Zhang,E-mail address:zzh7448@126.com
基金资助:
Supported by the National Natural Science Foundation of China (51678408, 51478314, 51638011), the National Key Research and Development Program of China (2016YFC0400506), the Natural Science Foundation of Tianjin (14JCQNJC09000), the Research Fund of Tianjin Key Laboratory of Aquatic Science and Technology (TJKLASTZD-2016-06).

17α-Ethinylestradiol removal from water by magnetic ion exchange resin

Liang Wang^1,2, Lu Liu², Zhaohui Zhang^1,2, Bin Zhao^1,2, Junjing Li^1,2, Bingjie Dong², Nian Liu²

1 State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China;
2 Department of Environmental Engineering, Tianjin Polytechnic University, Tianjin 300387, China

Received:2017-06-23 Revised:2017-08-06 Online:2018-04-28 Published:2018-05-19
Contact: Zhaohui Zhang,E-mail address:zzh7448@126.com
Supported by:
Supported by the National Natural Science Foundation of China (51678408, 51478314, 51638011), the National Key Research and Development Program of China (2016YFC0400506), the Natural Science Foundation of Tianjin (14JCQNJC09000), the Research Fund of Tianjin Key Laboratory of Aquatic Science and Technology (TJKLASTZD-2016-06).

摘要/Abstract

摘要： Magnetic ion exchange (MIEX) resins have received considerable attention in drinking water treatment due to their fast and efficient removal of dissolved organic carbon (DOC). Two types of mechanisms, i.e., ion exchange, reversible and irreversible adsorption, may occur during pollutants removal by MIEX. This work examined the removal mechanism of 17α-Ethinylestradiol (EE2) by MIEX. As one of typical estrogen micro-pollutants, EE2 existed as neutral molecule in natural water, and its charge density was close to zero[(0.00000219 ±0.00000015) meq·(μg EE2)^-1] based on the potentiometric titration method. However, the removal of EE2 by MIEX was much higher than that of other micro-pollutants previously reported. Multi-cycle adsorptionregeneration experiments and ion exchange stoichiometry analysis were conducted to elucidate the removal mechanism of EE2 by MIEX resin. The results suggested that the main removal mechanism of EE2 by MIEX was ion exchange instead of reversible micro-pore adsorption. The experimental analysis based on Donnan theory indicated that the internal micro-environment of resin beads was alkaline, in the alkaline environment EE2 would be ionized into negatively charged groups. As a result, ion exchange reaction occurred inside the pore of MIEX resin, and the removal process of EE2 by MIEX was dominated by the ion exchange reaction.

关键词: Magnetic ion exchange resin, Non-ionic micro-pollutants, Ion exchange, 17&alpha, -Ethinylestradiol, Drinking water treatment

Abstract: Magnetic ion exchange (MIEX) resins have received considerable attention in drinking water treatment due to their fast and efficient removal of dissolved organic carbon (DOC). Two types of mechanisms, i.e., ion exchange, reversible and irreversible adsorption, may occur during pollutants removal by MIEX. This work examined the removal mechanism of 17α-Ethinylestradiol (EE2) by MIEX. As one of typical estrogen micro-pollutants, EE2 existed as neutral molecule in natural water, and its charge density was close to zero[(0.00000219 ±0.00000015) meq·(μg EE2)^-1] based on the potentiometric titration method. However, the removal of EE2 by MIEX was much higher than that of other micro-pollutants previously reported. Multi-cycle adsorptionregeneration experiments and ion exchange stoichiometry analysis were conducted to elucidate the removal mechanism of EE2 by MIEX resin. The results suggested that the main removal mechanism of EE2 by MIEX was ion exchange instead of reversible micro-pore adsorption. The experimental analysis based on Donnan theory indicated that the internal micro-environment of resin beads was alkaline, in the alkaline environment EE2 would be ionized into negatively charged groups. As a result, ion exchange reaction occurred inside the pore of MIEX resin, and the removal process of EE2 by MIEX was dominated by the ion exchange reaction.

Key words: Magnetic ion exchange resin, Non-ionic micro-pollutants, Ion exchange, 17&alpha, -Ethinylestradiol, Drinking water treatment

Liang Wang, Lu Liu, Zhaohui Zhang, Bin Zhao, Junjing Li, Bingjie Dong, Nian Liu. 17α-Ethinylestradiol removal from water by magnetic ion exchange resin[J]. Chinese Journal of Chemical Engineering, 2018, 26(4): 864-869.

Liang Wang, Lu Liu, Zhaohui Zhang, Bin Zhao, Junjing Li, Bingjie Dong, Nian Liu. 17α-Ethinylestradiol removal from water by magnetic ion exchange resin[J]. Chin.J.Chem.Eng., 2018, 26(4): 864-869.

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17α-Ethinylestradiol removal from water by magnetic ion exchange resin

17α-Ethinylestradiol removal from water by magnetic ion exchange resin

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