Adsorption of Estrone on nanofiltration and reverse osmosis membranes in water and wastewater treatment
Nghiem, D. L.
Waite, T. D.
- Publisher: IWA Publishing
estrone | adsorption | Endocrine disrupter | wastewater treatment | reverse osmosis | natural organic matter | nanofiltration | hormone
Adsorption of the trace contaminant estrone, a natural hormone and commonly abundant in
surface waters and in treated as well as untreated wastewaters, to eight commercial
nanofiltration (NF) and reverse osmosis (RO) membranes was investigated under welldefined
conditions. Experiments were conducted in stainless steel stirred cells by spiking trace
levels (100ng.L-1) of estrone into five different matrices, namely MilliQ water, a bicarbonate
solution, synthetic natural waters containing natural organics, and secondary effluent. Results
show that estrone is adsorbed to the membranes to varying degrees with extent of adsorption
influenced by the feedwater composition with different mechanisms of association controlling
adsorption to different membrane types. Increase in membrane resistance is typically
observed to result in decrease in extent of estrone adsorption.
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