Sorption of steroidal hormones by electrodialysis membranes

نویسندگان

  • Laura J. Banasiak
  • Andrea I. Schafer
چکیده

14 The mechanisms of sorption of four steroidal hormones – estradiol, estrone, progesterone and 15 testosterone – to electrodialysis (ED) membranes were investigated as a function of solution pH 16 and presence of humic acid (HA). Hormone-membrane partition coefficients (log KAEM/CEM) 17 determined through sorption isotherm experiments suggested that hormone sorption was due to 18 hydrogen bonding and cation–π interactions between hormone and membrane functional groups. 19 Progesterone sorption at pH 7 (922 μg/cm 3 ) during ED was greater than estrone sorption (591 20 μg/cm 3 ) due to its greater cation-exchange membrane (CEM) bonding affinity. Estrone sorption at 21 pH 11 (487 μg/cm 3 ) was reduced due to estrone dissociation and electrostatic repulsion with 22

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تاریخ انتشار 2010