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|Title: ||Impact of organic matrix compounds on the retention of steroid hormone estrone by a ‘loose’ nanofiltration membrane|
|Authors: ||Schäfer, Andrea|
Nghiem, L. D.
Neale, Peta A.
|Issue Date: ||2010|
|Citation: ||Schäfer, A.I. ; Nghiem, D.L. ; Meier, A. ; Neale, P.A. (2010) Impact of organic matrix compounds on the retention of steroid hormones in loose nanofiltration, Journal of Separation and Purification Technology, 73, 2, 179-187.|
|Abstract: ||The impact of solute-solute interactions on retention and membrane adsorption of the
micropollutant estrone was determined in the presence of surfactant sodium dodecyl sulphate
(SDS), natural organic matter (NOM) and cellulose. A five cycle stirred cell protocol was used to
study progressing saturation of a loose nanofiltration membrane with estrone. Adsorption was
absent at high pH when the estrone molecule was dissociated, while at low and neutral pH the
membrane was saturated after three filtration cycles and breakthrough was obvious. Increased
estrone retention in the presence of cellulose was observed due to estrone-cellulose partitioning.
SDS and NOM reduced estrone retention at low and neutral pH while no significant effect was
visible at alkaline pH when solute-solute interactions were minimal. The adsorption and deposition
of estrone onto the membrane was up to 50% of the total estrone in solution. Using experimental
partition coefficients, the mass of estrone sorbed to organic matter as a function of pH was
estimated. Results were similar to the total mass of estrone adsorbed to the membrane despite the
partition coefficients being quantified at equilibrium (24 hours) while the experiment was
(naturally) not. This study provides first quantifiable evidence of the impact of micropollutantorganic
matter interactions in membrane filtration.|
|Appears in Collections:||Membrane Technology Research Group publications|
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