Membrane Research Laboratory

Alīgarh, India

Membrane Research Laboratory

Alīgarh, India
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Arsalan M.,Membrane Research Laboratory | Imteyaz S.,Membrane Research Laboratory | Zeeshan M.,Analytical and Polymer Research Laboratory | Rafiuddin,Membrane Research Laboratory
Desalination and Water Treatment | Year: 2015

PVC-supported strontium tungstate composite membrane was prepared by the cast die frame of membrane preparation. The strontium tungstate material was qualitatively synthesized by sol-gel method of material synthesis. The membrane was characterized by SEM, XRD, FTIR, and simultaneous TGA/DTA studies. These characterizations demonstrated the material nature, functional groups, surface texture, porosity, thermal stability, ion-exchange property etc. The electrochemical properties have been studied by TMS theoretical approach which easily determines the important parameters of membranes like transport number, mobility ratio, charge density, charge effectiveness etc. The theoretical and observed electrolyte potential calculations get the values of charge density. The observed ionic potential and graphical fixed-charge density of both the membranes follows CaCl2 < MgCl2 < BeCl2 and CaCl2 > MgCl2 > BeCl2 order, respectively. © 2015 Balaban Desalination Publications. All rights reserved.


Arsalan M.,Membrane Research Laboratory | Zeeshan M.,Analytical and Polymer Research Laboratory
Journal of Molecular Structure | Year: 2015

PVC incorporated ZT/ZM composite materials have been synthesized via qualitative sol-gel method of material synthesis. Both the composite materials have the combination of inorganic ion-exchanger of different metal salt as well as same organic polymers, which is used to design a new class of organic-inorganic composite ion exchange membrane with much better chemical and mechanical properties, good ion-exchange capacity, higher thermal stability, reproducibility, selectivity etc. The physicochemical, electrochemical, mechanical and thermal properties of both the membranes were characterized by SEM, XRD, FTIR and simultaneous TGA-DTA studies were carried out to understand the ion exchange behavior of materials. The above analysis demonstrated the functional groups, material nature, thermal stability, surface structure, porosity, elemental percentages, ion transportation etc. The electrochemical properties have been studied by TMS theoretical approach which easily determined the important parameters of membranes like transport number, mobility ratio, charge density, charge effectiveness etc. The observed ionic potential and graphical fixed-charge density of both the membranes follows KCl < NaCl < LiCl and KCl > NaCl > LiCl order respectively. © 2015 Published by Elsevier B.V.


Ishrat U.,Membrane Research Laboratory | Rafiuddin,Membrane Research Laboratory
Desalination | Year: 2012

The functional properties of the composite membranes prepared by applying different pressures generated from polystyrene and titanium molybdate are described. The fabricated membranes were characterized by using Fourier Transform Infrared, X-ray Diffraction, particle size analyzer and Scanning electron microscopy technique and have been investigated for its functional, diffusive and electrochemical properties. The diffusion of electrolytes as determined by the Torell, Meyer and Sievers (TMS) method reveals dependence of membrane potential on the porosity, charge on the membrane matrix, charge and size of permeating ions. The membrane determines the activity of cations with fairly good accuracy in the higher concentration range and shows a great selectivity for K +. The selectivity for other alkali cations (Na + and Li +) has also been calculated. The fixed charge density of the membrane had been evaluated and was found to be mechanically stable, and can be operated over a wide pH range. Other electrochemical properties like transport number and its ion-exchange capacity have been discussed. © 2012 Elsevier B.V..

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