N. Bolong et al. / Desalination 239 (2009) 229–246
Table 4
Rejection quantification of EDC through nanofiltration via the sieving (mass transfer) mechanism [79]
Parameter Quantification mode Rejection mechanism
Molecular weight Filtration of solute (e.g PEG, PVP etc) at 90% rejection Sieving effect increases for
larger molecules
Desalting degree Filtration of sodium chloride or magnesium chloride at
varied desalting degree, i.e., 500–2000 mg/L
Higher rejection for higher
desalting degree
Membrane porosity Density of pores or effective number of pores calculation
in membrane using mathematical transport models
Rejection data fitted with
transport model
Surface morphology
microscopy
Physical surface area and surface roughness via atomic
force microscopy and scanning electron microscopy
Discrete-small pore structure
increases selectivity of
membrane