Quantification of solute-solute interactions in steroidal hormone removal by ultrafiltration membranes

Neale, Peta A. and Schafer, Andrea I. (2012) Quantification of solute-solute interactions in steroidal hormone removal by ultrafiltration membranes. Separation and Purification Technology, 90 31-38. doi:10.1016/j.seppur.2012.02.011


Author Neale, Peta A.
Schafer, Andrea I.
Title Quantification of solute-solute interactions in steroidal hormone removal by ultrafiltration membranes
Journal name Separation and Purification Technology   Check publisher's open access policy
ISSN 1383-5866
1873-3794
Publication date 2012-04-27
Sub-type Article (original research)
DOI 10.1016/j.seppur.2012.02.011
Volume 90
Start page 31
End page 38
Total pages 8
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2013
Language eng
Formatted abstract
Micropollutant removal by membrane filtration is variable and can be influenced by the presence of organic matter. When considering removal mechanisms, many studies have focused on membrane adsorption and solute–foulant interactions; however, little is known regarding the influence of solute–solute interactions as these are typically difficult to quantify. In this study experimental organic matter–water partition coefficients (KOM) were applied to quantify and elucidate the influence of solute–solute interactions for steroidal hormone removal by ultrafiltration. The results indicated that the removal of all hormones increased in the presence of organic matter and this was related to hormone–organic matter interactions. Organic matter did not increase membrane adsorption or cause significant fouling for most molecular weight cut-off (MWCO) membranes, thus solute–solute interactions were the dominant mechanism for hormone removal as expected from previous quantification of such interactions using a specifically developed solid-phase microextraction (SPME) technique. While quantification was only partially successful at low organic carbon concentrations, clear evidence of the importance of solute–solute interactions was demonstrated in concentration studies. Experimental removal and estimated removal due to solute–solute interactions for estrone was comparable at high organic matter concentrations of 25–50 mgC/L for both 10 (48–52%) and 100 kDa (33–38%) membranes, suggesting that organic matter concentration was an important factor in solute–solute interactions. This study represents the first time that experimental organic matter–water partition coefficients have been applied to assess solute–solute interactions in membrane filtration, specifically ultrafiltration.
Keyword Ultrafiltration
Organic matter
Steroidal hormone
Solute-solute interaction
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
National Research Centre for Environmental Toxicology Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 05 Jun 2012, 12:59:01 EST by System User on behalf of National Res Centre For Environmental Toxicology