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

Liang Wang; Lu Liu; Zhaohui Zhang; Bin Zhao; Junjing Li; Bingjie Dong; Nian Liu

doi:10.1016/j.cjche.2017.08.006

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

Energy, Resources and Environmental Technology | Updated：2026-01-06

- 17α-Ethinylestradiol removal from water by magnetic ion exchange resin
- Chinese Journal of Chemical Engineering Vol. 26, Issue 4, Pages: 864-869(2018)
- Affiliations：
  
  2 Department of Environmental Engineering, Tianjin Polytechnic University,Tianjin,China,300387
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.08.006
  CLC：
- Published：2018
- Accepted：
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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.
DOI：

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. DOI： 10.1016/j.cjche.2017.08.006.

摘要

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 charg

ed 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.

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