TY - GEN
T1 - Removal of bisphenol A and 17β-estradiol in carbon nanotube-UF membrane system for drinking water treatment
AU - Heo, Jiyong
AU - Flora, Joseph R.V.
AU - Her, Namguk
AU - Park, Yong Gyun
AU - Yoon, Yeomin
PY - 2010
Y1 - 2010
N2 - Retention and adsorption of endocrine disrupting compounds such as bisphenol A (BPA) and 17β-estradiol (E2) was examined using a commercially available ultrafiltration (UF) membrane. A stirred cell operated in a batch dead-end stirred-cell was employed to study solute retention and the membrane flux of solutions in the absence and presence of natural organic matter (NOM) and single-walled carbon nanotubes (CNTs) under different pH conditions. Both batch adsorption and stirred-cell filtration experiments indicated that adsorption is an important mechanism for the retention of hydrophobic compounds and is related to the octanol-water partition coefficient. The results also indicated that BPA and E2 transport is influenced by NOM because it fouls the membrane by causing pore blockage and cake/gel formation. The percentage retention of BPA/E2 during the UF filtration in the absence and presence of NOM and CNTs (at pH 7.5 and cumulative permeate volume of 500 mL) were 20.2/10.3 (membrane only), 8.6/6.3 (NOM), 77.6/95.2 (CNTs), and 62.8/80.6 (NOM+CNTs). Although retention and adsorption showed similar relationships at pH 4 and 7.5, their rate decreased at pH 11. 2010
AB - Retention and adsorption of endocrine disrupting compounds such as bisphenol A (BPA) and 17β-estradiol (E2) was examined using a commercially available ultrafiltration (UF) membrane. A stirred cell operated in a batch dead-end stirred-cell was employed to study solute retention and the membrane flux of solutions in the absence and presence of natural organic matter (NOM) and single-walled carbon nanotubes (CNTs) under different pH conditions. Both batch adsorption and stirred-cell filtration experiments indicated that adsorption is an important mechanism for the retention of hydrophobic compounds and is related to the octanol-water partition coefficient. The results also indicated that BPA and E2 transport is influenced by NOM because it fouls the membrane by causing pore blockage and cake/gel formation. The percentage retention of BPA/E2 during the UF filtration in the absence and presence of NOM and CNTs (at pH 7.5 and cumulative permeate volume of 500 mL) were 20.2/10.3 (membrane only), 8.6/6.3 (NOM), 77.6/95.2 (CNTs), and 62.8/80.6 (NOM+CNTs). Although retention and adsorption showed similar relationships at pH 4 and 7.5, their rate decreased at pH 11. 2010
UR - http://www.scopus.com/inward/record.url?scp=84873513782&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84873513782
SN - 9781617823404
T3 - Water Quality Technology Conference and Exposition 2010
SP - 2106
EP - 2120
BT - Water Quality Technology Conference and Exposition 2010
T2 - Water Quality Technology Conference and Exposition 2010
Y2 - 14 November 2010 through 18 November 2010
ER -