Characterization and Evaluation of Reverse Osmosis Membranes Modified with Ag2O Nanoparticles to Improve Performance
, A. S. AL-Hobaib, Kh. M. AL-Sheetan, Mohammed Rafi Shaik*, N. M. Alandis and M. S. Alsuhybani . 2015
The objective of this work was to prepare and characterize a new and highly efficient modified membrane by
in situ interfacial polymerization on porous polysulfone supports. The process used m-phenylenediamine and
trimesoyl chloride in hexane, incorporating silver oxide Ag2O nanoparticles of varied concentrations from 0.001 to
0.1 wt%. Ag2O nanoparticles were prepared at different sizes varying between 20 and 50 nm. The modified membranes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), transmission electron microscopy (TEM), and contact angle measurement. The results showed a smooth membrane surface and average surface roughness from 31 to 74 nm. Moreover, hydrophilicity improved and the contact angle decreased to 41° at 0.009 wt% silver oxide. The performances of the developed membranes were investigated by measuring permeate fluxes and salt rejection capability by passing NaCl solutions (2000 ppm) through the membranes at 225 psi. The results showed that the flux increased from 26 to 40.5 L/m2 h, while the salt rejection was high, at 99 %, with 0.003 wt% Ag2O nanoparticles.
The objective of this work was to prepare and characterize a new and highly efficient modified membrane by
in situ interfacial polymerization on porous polysulfone supports. The process used…
The objective of this work was to develop a suitable and highly efficient reverse osmosis membrane incorporating a co-solvent system. A polyamide thin-film composite membrane has been prepared by…
The synthesis of 2,6-bis(hydroxy(phenyl)methyl)cyclohexanone 1 is described. The molecular structure of the title compound 1 was confirmed by NMR, FT-IR, MS, CHN…