Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/14515
Title: Reverse osmosis and nanofiltration membrane rejection of endocrine disrupting chemicals
Authors: TAN XIN
Keywords: Endocrine disrupting chemicals, rejection affecting factors, reverse osmosis, nanofiltration.
Issue Date: 29-Dec-2004
Source: TAN XIN (2004-12-29). Reverse osmosis and nanofiltration membrane rejection of endocrine disrupting chemicals. ScholarBank@NUS Repository.
Abstract: Effects of competition among EDCs on their rejection, pH, ionic strength, adsorption, and 24-hour operation were investigated using cellulous acetate and polyamide membranes. RO process was observed more effectively at trace EDC removal, compared with NF process. Physical sieving and adsorption were likely the cause of high estrone rejection by membranes. Adsorption contributed to the early stages of 24-hour operation while physical sieving would have been the dominant mechanism over the 24-hour operation. Membrane adsorption of EDCs was very competitive for EDCs mixed in water, which resulted in a decreased rejection of EDC. Electro-repulsion does not contribute to a higher estrone rejection by membranes. It contributed to a high removal of estrone by cellulose acetate ST-28 and SP-28 membranes while a sharply decreased removal of estrone by polyamide AG membrane, which was attributed to membrane surface characteristics.
URI: http://scholarbank.nus.edu.sg/handle/10635/14515
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