Organic nanocolloid fouling in UF membranes

被引:19
作者
Kwon, Boksoon
Cho, Jaeweon
Park, Noeon
Pellegrino, John [1 ]
机构
[1] Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA
[2] Gwangju Inst Sci & Technol, Adv Environm Monitoring Res Ctr, Dept Environm Sci & Engn, Kwangju 500712, South Korea
关键词
dialysis; fouling; natural organic matter; organic nanocolloids; polyethersulfone; regenerated cellulose; ultrafiltration;
D O I
10.1016/j.memsci.2005.12.007
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Ultrafiltration (UF) membranes may be used as both a primary water treatment and/or as a pretreatment for reverse osmosis or nanofiltration during desalination. Important operational issues continue to revolve around the choices of materials., nominal molecular mass cutoff (MWCO), and filtration hydrodynamics. To study the former two points, we isolated a fraction of natural organic matter, which we refer to as organic nanocolloids, from a drinking water source using a dialysis membrane with a MWCO of 2000 g/mol. We measured the physico-chemical properties of these nanocolloids and four high-quality UF membranes and performed short-time filtration measurements. The organic nanocolloids had a relatively higher molecular mass compared to typical NOM and an effective diffusion coefficient of similar to 3.20 x 10(-6) cm(2)/s. Under the same filtration conditions, the organic nanocolloids were shown to have different transport and theoretical surface interaction characteristics through regenerated cellulose (RC) than through polyethersulfone (PES) membranes. These differences made minimal difference in the filtration figures-of-merit - these were the observed total organic carbon (TOC) rejection and solution flux decline - when the two materials were in membranes with MWCO smaller than the nanocolloids, but not when the membranes' MWCO was on the same order as that of the nanocolloids. The RC had greater flux but rejected significantly less TOC and experienced more percentage flux decline over time. even though it theoretically would have less favorable interaction potentials with the organic nanocolloids. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:209 / 219
页数:11
相关论文
共 54 条
[1]  
AMY G, 2001, 90837 AM WAT WORKS A
[2]  
[Anonymous], 1999, FORMATION CONTROL DI
[3]  
Baker R.W., 2000, Membrane Technology and Applications, DOI DOI 10.1039/c3ee42350f
[4]   STEPS OF MEMBRANE BLOCKING IN FLUX DECLINE DURING PROTEIN MICROFILTRATION [J].
BOWEN, WR ;
CALVO, JI ;
HERNANDEZ, A .
JOURNAL OF MEMBRANE SCIENCE, 1995, 101 (1-2) :153-165
[5]   Assessing short-range membrane-colloid interactions using surface energetics [J].
Brant, JA ;
Childress, AE .
JOURNAL OF MEMBRANE SCIENCE, 2002, 203 (1-2) :257-273
[6]   The fouling of microfiltration membranes by NOM after coagulation treatment [J].
Carroll, T ;
King, S ;
Gray, SR ;
Bolto, BA ;
Booker, NA .
WATER RESEARCH, 2000, 34 (11) :2861-2868
[7]   Fluorescence excitation - Emission matrix regional integration to quantify spectra for dissolved organic matter [J].
Chen, W ;
Westerhoff, P ;
Leenheer, JA ;
Booksh, K .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2003, 37 (24) :5701-5710
[8]  
CHIN Y, 1994, ENVIRON SCI TECHNOL, V36, P3864
[9]   Membrane filtration of natural organic matter: factors and mechanisms affecting rejection and flux decline with charged ultrafiltration (UF) membrane [J].
Cho, J ;
Amy, G ;
Pellegrino, J .
JOURNAL OF MEMBRANE SCIENCE, 2000, 164 (1-2) :89-110
[10]   Membrane filtration of natural organic matter: Initial comparison of rejection and flux decline characteristics with ultrafiltration and nanofiltration membranes [J].
Cho, JW ;
Amy, G ;
Pellegrino, J .
WATER RESEARCH, 1999, 33 (11) :2517-2526