Modification of a polyamide reverse osmosis membrane by heat treatment for enhanced fouling resistance

Modification of a polyamide reverse osmosis membrane by heat treatment for enhanced fouling resistance

The use of heat treatment to improve solute rejection and fouling resistance of a polyamide reverse osmosis (RO) membrane was investigated in this study. Heat treatment was carried out by immersing the membrane samples in Milli-Q water at 70 degrees celcius for a specific duration. Heat treatment reduced the pure water permeability from 4.1 to 2.8 L/m2 bar but improved conductivity rejection fr...

Fouling reduction of reverse osmosis membrane by surface modification via layer-by-layer assembly

1383-5866/$ see front matter 2012 Elsevier B.V. A http://dx.doi.org/10.1016/j.seppur.2012.08.002 ⇑ Corresponding author. Tel./fax: +81 78 803 6180. E-mail address: [email protected] (H. Matsu To reduce membrane fouling of reverse osmosis (RO) membrane, we adopted layer-by-layer (LbL) assembly. LbL assembly has received attention as a means of preparing ultrathin layers of composite membrane...

Fouling Prediction in Reverse Osmosis Processes

In recent years, membrane separation processes have successfully established footholds in all areas of chemical separations. Semipermeable membranes are now enhancing and even replacing long-time standard techniques such as distillation and solvent extraction (1). They are also being used in the preparation of purified chemical and biological products as well as the treatment and recovery of ma...

Effects of feed solution characteristics and membrane fouling on N-nitrosamine rejection by reverse osmosis membranes

Augmentation of potable water sources with reclaimed municipal wastewater is an option of increasing importance for water security in regions and countries where severe water stress occurs. Consequently, the presence of emerging trace contaminants in reclaimed water has been recognised as a critical issue due to their potential adverse health effects. Notable examples of these trace organic che...

Effects of membrane fouling and scaling on boron rejection by nanofiltration and reverse osmosis membranes