TY - JOUR
T1 - Characterization of clean and natural organic matter (NOM) fouled NF and UF membranes, and foulants characterization
AU - Cho, Jaeweon
AU - Amy, Gary
AU - Pellegrino, John
AU - Yoon, Yeomin
PY - 1998/9/20
Y1 - 1998/9/20
N2 - Contact angles, zeta potentials, and IR spectra of clean and NOM-fouled membranes were compared to demonstrate differences in hydrophobicity, surface charge, and functional groups, respectively. Contact angle increased and decreased for membranes fouled with hydrophobic and hydrophilic NOM, respectively. Zeta potential decreased negatively (less negative) for membranes fouled with both hydrophobic and hydrophilic NOM, suggesting that ionizable functional groups were coated with non-ionizable NOM components (possibly neutrals). The IR spectra reduced in absorbance intensity for NOM-fouled membranes, suggesting that aromatic groups were coated with non-aromatic or less aromatic NOM components. The results of XAD-8/4 fractionations of foulants (desorbed NOM with NaOH) showed that hydrophilic and hydrophobic NOM components were the major foulants for membranes fouled with hydrophilic and hydrophobic NOM-source waters, respectively.
AB - Contact angles, zeta potentials, and IR spectra of clean and NOM-fouled membranes were compared to demonstrate differences in hydrophobicity, surface charge, and functional groups, respectively. Contact angle increased and decreased for membranes fouled with hydrophobic and hydrophilic NOM, respectively. Zeta potential decreased negatively (less negative) for membranes fouled with both hydrophobic and hydrophilic NOM, suggesting that ionizable functional groups were coated with non-ionizable NOM components (possibly neutrals). The IR spectra reduced in absorbance intensity for NOM-fouled membranes, suggesting that aromatic groups were coated with non-aromatic or less aromatic NOM components. The results of XAD-8/4 fractionations of foulants (desorbed NOM with NaOH) showed that hydrophilic and hydrophobic NOM components were the major foulants for membranes fouled with hydrophilic and hydrophobic NOM-source waters, respectively.
UR - http://www.scopus.com/inward/record.url?scp=0032552515&partnerID=8YFLogxK
U2 - 10.1016/S0011-9164(98)00100-3
DO - 10.1016/S0011-9164(98)00100-3
M3 - Conference article
AN - SCOPUS:0032552515
SN - 0011-9164
VL - 118
SP - 101
EP - 108
JO - Desalination
JF - Desalination
IS - 1-3
T2 - Proceedings of the 1998 Conference on Membranes in Drinking and Industrial Water Production. Part 2 (of 3)
Y2 - 21 September 1998 through 24 September 1998
ER -