Skip to main content

Sorption of steroidal hormones by electrodialysis membranes

Journal Article


Download full-text (Open Access)

Abstract


  • The mechanisms of sorption of four steroidal hormones – estradiol, estrone, progesterone and testosterone – to electrodialysis (ED) membranes were investigated as a function of solution pH and presence of humic acid (HA). Hormone-membrane partition coefficients (log KAEM/CEM) determined through sorption isotherm experiments suggested that hormone sorption was due to hydrogen bonding and cation–π interactions between hormone and membrane functional groups. Progesterone sorption at pH 7 (922 μg/cm3) during ED was greater than estrone sorption (591 μg/cm3) due to its greater cation-exchange membrane (CEM) bonding affinity. Estrone sorption at pH 11 (487 μg/cm3) was reduced due to estrone dissociation and electrostatic repulsion with negatively charged CEMs. Permeation of estrone (30–100 ng/cm2 h) through the anion-exchange membranes (AEMs) was observed. At pH 11, charge repulsion between estrone and HA coupled with AEM electrostatic attraction resulted in increased sorption. Partial membrane desorption was noted in isotherm (20–30%) and ED desorption (3.8%) experiments and was dependent on the initial mass sorbed, solution pH and resultant electrostatic interactions.

UOW Authors


  •   Schäfer, Andrea I. (external author)
  •   Banasiak, Laura

Publication Date


  • 2010

Citation


  • Banasiak, L. & Schafer, A. I. (2010). Sorption of steroidal hormones by electrodialysis membranes. Journal of Membrane Science, 365 (1-2), 198-205.

Scopus Eid


  • 2-s2.0-78049310233

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1606&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/569

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 198

End Page


  • 205

Volume


  • 365

Issue


  • 1-2

Abstract


  • The mechanisms of sorption of four steroidal hormones – estradiol, estrone, progesterone and testosterone – to electrodialysis (ED) membranes were investigated as a function of solution pH and presence of humic acid (HA). Hormone-membrane partition coefficients (log KAEM/CEM) determined through sorption isotherm experiments suggested that hormone sorption was due to hydrogen bonding and cation–π interactions between hormone and membrane functional groups. Progesterone sorption at pH 7 (922 μg/cm3) during ED was greater than estrone sorption (591 μg/cm3) due to its greater cation-exchange membrane (CEM) bonding affinity. Estrone sorption at pH 11 (487 μg/cm3) was reduced due to estrone dissociation and electrostatic repulsion with negatively charged CEMs. Permeation of estrone (30–100 ng/cm2 h) through the anion-exchange membranes (AEMs) was observed. At pH 11, charge repulsion between estrone and HA coupled with AEM electrostatic attraction resulted in increased sorption. Partial membrane desorption was noted in isotherm (20–30%) and ED desorption (3.8%) experiments and was dependent on the initial mass sorbed, solution pH and resultant electrostatic interactions.

UOW Authors


  •   Schäfer, Andrea I. (external author)
  •   Banasiak, Laura

Publication Date


  • 2010

Citation


  • Banasiak, L. & Schafer, A. I. (2010). Sorption of steroidal hormones by electrodialysis membranes. Journal of Membrane Science, 365 (1-2), 198-205.

Scopus Eid


  • 2-s2.0-78049310233

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1606&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/569

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 198

End Page


  • 205

Volume


  • 365

Issue


  • 1-2