Water and salt transport through two types of polyamide composite membranes

Eriksson, Peter K.

doi:10.1016/0376-7388(88)80024-3

Cited by 83 publications

(13 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FT30 membrane, consisting of a PA active layer with approximate thickness of 250 nm supported by an asymmetric porous PSf layer with a thickness of 50 m [12,13], was selected to represent commercial NF/RO membranes with PA active layer. RBS analyses were performed to assess the effects of helium ion irradiation on the elemental composition of both active and support layers, and the thickness and roughness of the active layer.…”

Section: Membrane With Pa Active Layermentioning

confidence: 99%

Physico-chemical integrity of nanofiltration/reverse osmosis membranes during characterization by Rutherford backscattering spectrometry

Cahill

Mariñas

2007

Journal of Membrane Science

View full text Add to dashboard Cite

Section: Membrane With Pa Active Layermentioning

confidence: 99%

Physico-chemical integrity of nanofiltration/reverse osmosis membranes during characterization by Rutherford backscattering spectrometry

Cahill

Mariñas

2007

Journal of Membrane Science

View full text Add to dashboard Cite

“…Figure 1 is taken from Eriksson (1986) and shows measured rejection of magnesium sulfate and sodium chloride for a NF40-2514 element. At 20 bar pressure, sodium chloride rejection drops from 60 percent to 20 percent when sodium chloride concentration increases from 2 g/l to 40 g/l.…”

Section: Nanofiltration Membranesmentioning

confidence: 99%

Nanofiltration extends the range of membrane filtration

Eriksson¹

1988

Environ. Prog.

Self Cite

271

View full text Add to dashboard Cite

Nanoflltration is a pressure driven membrane process between reverse osmosis and ultrafiltration. The rejection is low for salts with monovalent anion and nonionized organics with molecular weight below 150 while high for salts with di-and multivalent anions and organics with molecular weight above 300. Examples of applications are removal of color and TOC from Florida surface water, removal of hardness, radium, and sulfate from well water, removal of sulfate from seawater and simultaneous removal of sodium chloride and concentration of organics with molecular weight 300-1 000 in the food and pharmaceutical industries. The investment cost for a nanofiltration plant is about the same as for a brackish water reverse osmosis plant, but the energy savings can be considerable by using nanoflltration instead of reverse osmosis.

show abstract

“…The composite membranes are extensively used in reverse osmosis (RO) desalination processes. [1][2][3][4] These membranes have a thin and dense active layer that controls membrane permeability and rejection, and a much thicker porous substrate provides mechanical support to the active layer. To achieve high permeability and selectivity, the active layer should be ultra-thin and hydrophilic.…”

Section: Introductionmentioning

confidence: 99%

Preparation of reverse osmosis composite membrane with high flux by interfacial polymerization of MPD and TMC

Qiu

Zhang

et al. 2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this study, reverse osmosis (RO) composite membrane with extra-thin separation layer was prepared by the interfacial polymerization (IP) of metaphenylene diamine (MPD) with trimesoyl chloride (TMC) on the surface of polysulfone (PS) support membrane. The properties and structures of skin layer of RO composite membranes were characterized by FTIR and SEM, it was found that IP had occurred and the separation layer was formed. The effects of the monomer concentration on membrane flux and salt rejection were investigated, and the optimum concentration of MPD and TMC were 2 and 0.3% (w/v), respectively. To improve flux, the phase-transfer catalyst was added to the water phase, and the effects were remarkable when the concentration of MPD was low, in which both salt rejection and flux increased by 20% than initial results. When some of the hydrophilic additives such as alcohols and phenols were added into water phase, the flux of the prepared membrane increased from 13.03 to 33.42 L/(m 2 h) without loss in salt rejection.

show abstract

Water and salt transport through two types of polyamide composite membranes

Cited by 83 publications

References 3 publications

Physico-chemical integrity of nanofiltration/reverse osmosis membranes during characterization by Rutherford backscattering spectrometry

Physico-chemical integrity of nanofiltration/reverse osmosis membranes during characterization by Rutherford backscattering spectrometry

Nanofiltration extends the range of membrane filtration

Preparation of reverse osmosis composite membrane with high flux by interfacial polymerization of MPD and TMC

Contact Info

Product

Resources

About